黑马Android(11）音乐播放器/视频播放器/照相机/常见对话框/notification通知/样式和主题/帧动画/传感器/应用程序反编译与安装

Posted 2020-07-13 吴英强

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了黑马Android(11）音乐播放器/视频播放器/照相机/常见对话框/notification通知/样式和主题/帧动画/传感器/应用程序反编译与安装相关的知识，希望对你有一定的参考价值。

音乐播放器api

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/et_path"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="请输入要播放文件的路径" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/bt_play"
            android:onClick="play"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="播放" />
        <Button
              android:id="@+id/bt_pause"
            android:onClick="pause"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="暂停" />
        <Button
              android:id="@+id/bt_stop"
            android:onClick="stop"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="停止" />
        <Button
              android:id="@+id/bt_replay"
            android:onClick="replay"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="重播" />
    </LinearLayout>

</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.musicplayer"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itheima.musicplayer.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

package com.itheima.musicplayer;

import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
	private EditText et_path;

	private MediaPlayer mediaPlayer;

	private Button bt_play, bt_pause, bt_stop, bt_replay;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		et_path = (EditText) findViewById(R.id.et_path);
		bt_play = (Button) findViewById(R.id.bt_play);
		bt_pause = (Button) findViewById(R.id.bt_pause);
		bt_stop = (Button) findViewById(R.id.bt_stop);
		bt_replay = (Button) findViewById(R.id.bt_replay);
	}

	/**
	 * 播放
	 * 
	 * @param view
	 */
	public void play(View view) {
		String filepath = et_path.getText().toString().trim();
		File file = new File(filepath);
		if (file.exists()) {
			try {
				mediaPlayer = new MediaPlayer();
				mediaPlayer.setDataSource(filepath);// 设置播放的数据源。
				mediaPlayer.setAudiostreamType(AudioManager.STREAM_MUSIC);
				mediaPlayer.prepare();// 准备开始播放 播放的逻辑是c代码在新的线程里面执行。
				mediaPlayer.start();
				bt_play.setEnabled(false);
				mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
					@Override
					public void onCompletion(MediaPlayer mp) {
						bt_play.setEnabled(true);
					}
				});
			} catch (Exception e) {
				e.printStackTrace();
				Toast.makeText(this, "播放失败", 0).show();
			}
		} else {
			Toast.makeText(this, "文件不存在，请检查文件的路径", 0).show();
		}
	}

	/**
	 * 暂停
	 * 
	 * @param view
	 */
	public void pause(View view) {
		if ("继续".equals(bt_pause.getText().toString())) {
			mediaPlayer.start();
			bt_pause.setText("暂停");
			return;
		}
		if (mediaPlayer != null && mediaPlayer.isPlaying()) {
			mediaPlayer.pause();
			bt_pause.setText("继续");
		}
	}

	/**
	 * 停止
	 * 
	 * @param view
	 */
	public void stop(View view) {
		if (mediaPlayer != null && mediaPlayer.isPlaying()) {
			mediaPlayer.stop();
			mediaPlayer.release();
			mediaPlayer = null;
		}
		bt_pause.setText("暂停");
		bt_play.setEnabled(true);
	}

	/**
	 * 重播
	 * 
	 * @param view
	 */
	public void replay(View view) {
		if (mediaPlayer != null && mediaPlayer.isPlaying()) {
			mediaPlayer.seekTo(0);
		} else {
			play(view);
		}
		bt_pause.setText("暂停");
	}

}

网络音乐播放器

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <EditText
        android:text="http://192.168.1.100:8080/hd.mp3"
        android:id="@+id/et_path"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="请输入要播放文件的路径" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/bt_play"
            android:onClick="play"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="播放" />
        <Button
              android:id="@+id/bt_pause"
            android:onClick="pause"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="暂停" />
        <Button
              android:id="@+id/bt_stop"
            android:onClick="stop"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="停止" />
        <Button
              android:id="@+id/bt_replay"
            android:onClick="replay"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="重播" />
    </LinearLayout>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.musicplayer"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itheima.musicplayer.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

package com.itheima.musicplayer;

import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
	private EditText et_path;
	
	private MediaPlayer mediaPlayer;
	
	private Button bt_play,bt_pause,bt_stop,bt_replay;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		et_path = (EditText) findViewById(R.id.et_path);
		bt_play = (Button) findViewById(R.id.bt_play);
		bt_pause = (Button) findViewById(R.id.bt_pause);
		bt_stop = (Button) findViewById(R.id.bt_stop);
		bt_replay = (Button) findViewById(R.id.bt_replay);
	}
	/**
	 * 播放
	 * @param view
	 */
	public void play(View view) {
		String filepath = et_path.getText().toString().trim();
		//http://
		if(filepath.startsWith("http://")){
			try {
				mediaPlayer = new MediaPlayer();
				mediaPlayer.setDataSource(filepath);//设置播放的数据源。
				mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
				//mediaPlayer.prepare();//同步的准备方法。
				mediaPlayer.prepareAsync();//异步的准备
				mediaPlayer.setOnPreparedListener(new OnPreparedListener() {
					@Override
					public void onPrepared(MediaPlayer mp) {
						mediaPlayer.start();
						bt_play.setEnabled(false);
					}
				});
				mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
					@Override
					public void onCompletion(MediaPlayer mp) {
						bt_play.setEnabled(true);
					}
				});
			} catch (Exception e) {
				e.printStackTrace();
				Toast.makeText(this, "播放失败", 0).show();
			}
		}else{
			Toast.makeText(this, "请检查文件的路径", 0).show();
		}
	}
	/**
	 * 暂停
	 * @param view
	 */
	public void pause(View view) {
		if("继续".equals(bt_pause.getText().toString())){
			mediaPlayer.start();
			bt_pause.setText("暂停");
			return;
		}
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.pause();
			bt_pause.setText("继续");
		}
	}
	/**
	 * 停止
	 * @param view
	 */
	public void stop(View view) {
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.stop();
			mediaPlayer.release();
			mediaPlayer = null;
		}
		bt_pause.setText("暂停");
		bt_play.setEnabled(true);
	}
	/**
	 * 重播
	 * @param view
	 */
	public void replay(View view) {
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.seekTo(0);
		}else{
			play(view);
		}
		bt_pause.setText("暂停");
	}

}

媒体播放器的生命周期

SurfaceView

surfaceview ：完成单位时间内大量的界面变化。

视频播放器。

游戏。

双缓冲机制：内部有两个子线程。

A 解码图像--->前台显示--->解码图像---> 前台显示

B 解码图像--->前台显示---> 解码图像

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.musicplayer"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itheima.musicplayer.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/et_path"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="请输入要播放文件的路径" />

    <SeekBar
        android:id="@+id/seekBar1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/bt_play"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="play"
            android:text="播放" />

        <Button
            android:id="@+id/bt_pause"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="pause"
            android:text="暂停" />

        <Button
            android:id="@+id/bt_stop"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="stop"
            android:text="停止" />

        <Button
            android:id="@+id/bt_replay"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="replay"
            android:text="重播" />
    </LinearLayout>

    <SurfaceView
        android:id="@+id/sv"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</LinearLayout>

package com.itheima.musicplayer;

import java.io.File;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Toast;

public class MainActivity extends Activity {
	private EditText et_path;
	private MediaPlayer mediaPlayer;
	
	private Button bt_play,bt_pause,bt_stop,bt_replay;
	
	private SurfaceView sv;
	private SurfaceHolder holder;
	
	private int position;
	private String filepath;

	private SeekBar seekBar1;
	
	private Timer timer;
	private TimerTask task;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		et_path = (EditText) findViewById(R.id.et_path);
		bt_play = (Button) findViewById(R.id.bt_play);
		bt_pause = (Button) findViewById(R.id.bt_pause);
		bt_stop = (Button) findViewById(R.id.bt_stop);
		bt_replay = (Button) findViewById(R.id.bt_replay);
		
		seekBar1 = (SeekBar) findViewById(R.id.seekBar1);
		seekBar1.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
			
			@Override
			public void onStopTrackingTouch(SeekBar seekBar) {
				int postion = seekBar.getProgress();
				mediaPlayer.seekTo(postion);
			}
			
			@Override
			public void onStartTrackingTouch(SeekBar seekBar) {
				
			}
			
			@Override
			public void onProgressChanged(SeekBar seekBar, int progress,
					boolean fromUser) {
				
			}
		});
		
		//得到surfaceview
		sv = (SurfaceView) findViewById(R.id.sv);
		//得到显示界面内容的容器
		holder = sv.getHolder();
		//在低版本模拟器上运行记得加上下面的参数。不自己维护双缓冲区，而是等待多媒体播放框架主动的推送数据。
		holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		holder.addCallback(new Callback() {
			
			@Override
			public void surfaceDestroyed(SurfaceHolder holder) {
				System.out.println("destoryed");
				if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
					position = mediaPlayer.getCurrentPosition();
					mediaPlayer.stop();
					mediaPlayer.release();
					mediaPlayer = null;
					timer.cancel();
					task.cancel();
					timer = null;
					task = null;
				}
			}
			
			@Override
			public void surfaceCreated(SurfaceHolder holder) {
				System.out.println("created");
				if(position>0){//记录的有播放进度。
					try {
						mediaPlayer = new MediaPlayer();
						mediaPlayer.setDataSource(filepath);//设置播放的数据源。
						mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
						mediaPlayer.setDisplay(holder);
						mediaPlayer.prepare();//准备开始播放 播放的逻辑是c代码在新的线程里面执行。
						mediaPlayer.start();
						mediaPlayer.seekTo(position);
						bt_play.setEnabled(false);
						mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
							@Override
							public void onCompletion(MediaPlayer mp) {
								bt_play.setEnabled(true);
							}
						});
						int max = mediaPlayer.getDuration();
						seekBar1.setMax(max);
						timer = new Timer();
						task = new TimerTask() {
							@Override
							public void run() {
								seekBar1.setProgress(mediaPlayer.getCurrentPosition());
							}
						};
						timer.schedule(task, 0, 500);
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
			
			@Override
			public void surfaceChanged(SurfaceHolder holder, int format, int width,
					int height) {
				System.out.println("changed");
			}
		});
		
	}
	/**
	 * 播放
	 * @param view
	 */
	public void play(View view) {
		filepath = et_path.getText().toString().trim();
		File file = new File(filepath);
		if(file.exists()){
			try {
				mediaPlayer = new MediaPlayer();
				mediaPlayer.setDataSource(filepath);//设置播放的数据源。
				mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
				mediaPlayer.setDisplay(holder);
				mediaPlayer.prepare();//准备开始播放 播放的逻辑是c代码在新的线程里面执行。
				mediaPlayer.start();
				//设置拖动进度条的最大值
				int max = mediaPlayer.getDuration();
				seekBar1.setMax(max);
				timer = new Timer();
				task = new TimerTask() {
					@Override
					public void run() {
						seekBar1.setProgress(mediaPlayer.getCurrentPosition());
					}
				};
				timer.schedule(task, 0, 500);
				
				bt_play.setEnabled(false);
				mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
					@Override
					public void onCompletion(MediaPlayer mp) {
						bt_play.setEnabled(true);
					}
				});
			} catch (Exception e) {
				e.printStackTrace();
				Toast.makeText(this, "播放失败", 0).show();
			}
		}else{
			Toast.makeText(this, "文件不存在，请检查文件的路径", 0).show();
		}
	}
	/**
	 * 暂停
	 * @param view
	 */
	public void pause(View view) {
		if("继续".equals(bt_pause.getText().toString())){
			mediaPlayer.start();
			bt_pause.setText("暂停");
			return;
		}
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.pause();
			bt_pause.setText("继续");
		}
	}
	/**
	 * 停止
	 * @param view
	 */
	public void stop(View view) {
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.stop();
			mediaPlayer.release();
			mediaPlayer = null;
		}
		bt_pause.setText("暂停");
		bt_play.setEnabled(true);
	}
	/**
	 * 重播
	 * @param view
	 */
	public void replay(View view) {
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.seekTo(0);
		}else{
			play(view);
		}
		bt_pause.setText("暂停");
	}

}

版本兼容问题

//在低版本模拟器上运行记得加上下面的参数。不自己维护双缓冲区，而是等待多媒体播放框架主动的推送数据。
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

在线视频播放器

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.musicplayer"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itheima.musicplayer.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

package com.itheima.musicplayer;

import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
	private EditText et_path;
	
	private MediaPlayer mediaPlayer;
	
	private Button bt_play,bt_pause,bt_stop,bt_replay;
	
	private SurfaceView sv;
	private SurfaceHolder holder;
	
	private int position;
	private String filepath;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		et_path = (EditText) findViewById(R.id.et_path);
		bt_play = (Button) findViewById(R.id.bt_play);
		bt_pause = (Button) findViewById(R.id.bt_pause);
		bt_stop = (Button) findViewById(R.id.bt_stop);
		bt_replay = (Button) findViewById(R.id.bt_replay);
		//得到surfaceview
		sv = (SurfaceView) findViewById(R.id.sv);
		//得到显示界面内容的容器
		holder = sv.getHolder();
		//在低版本模拟器上运行记得加上下面的参数。不自己维护双缓冲区，而是等待多媒体播放框架主动的推送数据。
		holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		holder.addCallback(new Callback() {
			
			@Override
			public void surfaceDestroyed(SurfaceHolder holder) {
				System.out.println("destoryed");
				if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
					position = mediaPlayer.getCurrentPosition();
					mediaPlayer.stop();
					mediaPlayer.release();
					mediaPlayer = null;
				}
			}
			
			@Override
			public void surfaceCreated(SurfaceHolder holder) {
				System.out.println("created");
				if(position>0){//记录的有播放进度。
					try {
						mediaPlayer = new MediaPlayer();
						mediaPlayer.setDataSource(filepath);//设置播放的数据源。
						mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
						mediaPlayer.setDisplay(holder);
						mediaPlayer.prepare();//准备开始播放 播放的逻辑是c代码在新的线程里面执行。
						mediaPlayer.start();
						mediaPlayer.seekTo(position);
						bt_play.setEnabled(false);
						mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
							@Override
							public void onCompletion(MediaPlayer mp) {
								bt_play.setEnabled(true);
							}
						});
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
			
			@Override
			public void surfaceChanged(SurfaceHolder holder, int format, int width,
					int height) {
				System.out.println("changed");
			}
		});
		
	}
	/**
	 * 播放
	 * @param view
	 */
	public void play(View view) {
		filepath = et_path.getText().toString().trim();
		//File file = new File(filepath);
		if(filepath.startsWith("http://")){
			try {
				mediaPlayer = new MediaPlayer();
				mediaPlayer.setDataSource(filepath);//设置播放的数据源。
				mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
				mediaPlayer.setDisplay(holder);
				mediaPlayer.prepare();//准备开始播放 播放的逻辑是c代码在新的线程里面执行。
				mediaPlayer.start();
				bt_play.setEnabled(false);
				mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
					@Override
					public void onCompletion(MediaPlayer mp) {
						bt_play.setEnabled(true);
					}
				});
			} catch (Exception e) {
				e.printStackTrace();
				Toast.makeText(this, "播放失败", 0).show();
			}
		}else{
			Toast.makeText(this, "文件不存在，请检查文件的路径", 0).show();
		}
	}
	/**
	 * 暂停
	 * @param view
	 */
	public void pause(View view) {
		if("继续".equals(bt_pause.getText().toString())){
			mediaPlayer.start();
			bt_pause.setText("暂停");
			return;
		}
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.pause();
			bt_pause.setText("继续");
		}
	}
	/**
	 * 停止
	 * @param view
	 */
	public void stop(View view) {
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.stop();
			mediaPlayer.release();
			mediaPlayer = null;
		}
		bt_pause.setText("暂停");
		bt_play.setEnabled(true);
	}
	/**
	 * 重播
	 * @param view
	 */
	public void replay(View view) {
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.seekTo(0);
		}else{
			play(view);
		}
		bt_pause.setText("暂停");
	}

}

播放器的进度条

package com.itheima.musicplayer;

import java.io.File;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Toast;

public class MainActivity extends Activity {
	private EditText et_path;
	private MediaPlayer mediaPlayer;
	
	private Button bt_play,bt_pause,bt_stop,bt_replay;
	
	private SurfaceView sv;
	private SurfaceHolder holder;
	
	private int position;
	private String filepath;

	private SeekBar seekBar1;
	
	private Timer timer;
	private TimerTask task;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		et_path = (EditText) findViewById(R.id.et_path);
		bt_play = (Button) findViewById(R.id.bt_play);
		bt_pause = (Button) findViewById(R.id.bt_pause);
		bt_stop = (Button) findViewById(R.id.bt_stop);
		bt_replay = (Button) findViewById(R.id.bt_replay);
		
		seekBar1 = (SeekBar) findViewById(R.id.seekBar1);
		seekBar1.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
			
			@Override
			public void onStopTrackingTouch(SeekBar seekBar) {
				int postion = seekBar.getProgress();
				mediaPlayer.seekTo(postion);
			}
			
			@Override
			public void onStartTrackingTouch(SeekBar seekBar) {
				
			}
			
			@Override
			public void onProgressChanged(SeekBar seekBar, int progress,
					boolean fromUser) {
				
			}
		});
		
		//得到surfaceview
		sv = (SurfaceView) findViewById(R.id.sv);
		//得到显示界面内容的容器
		holder = sv.getHolder();
		//在低版本模拟器上运行记得加上下面的参数。不自己维护双缓冲区，而是等待多媒体播放框架主动的推送数据。
		holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		holder.addCallback(new Callback() {
			
			@Override
			public void surfaceDestroyed(SurfaceHolder holder) {
				System.out.println("destoryed");
				if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
					position = mediaPlayer.getCurrentPosition();
					mediaPlayer.stop();
					mediaPlayer.release();
					mediaPlayer = null;
					timer.cancel();
					task.cancel();
					timer = null;
					task = null;
				}
			}
			
			@Override
			public void surfaceCreated(SurfaceHolder holder) {
				System.out.println("created");
				if(position>0){//记录的有播放进度。
					try {
						mediaPlayer = new MediaPlayer();
						mediaPlayer.setDataSource(filepath);//设置播放的数据源。
						mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
						mediaPlayer.setDisplay(holder);
						mediaPlayer.prepare();//准备开始播放 播放的逻辑是c代码在新的线程里面执行。
						mediaPlayer.start();
						mediaPlayer.seekTo(position);
						bt_play.setEnabled(false);
						mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
							@Override
							public void onCompletion(MediaPlayer mp) {
								bt_play.setEnabled(true);
							}
						});
						int max = mediaPlayer.getDuration();
						seekBar1.setMax(max);
						timer = new Timer();
						task = new TimerTask() {
							@Override
							public void run() {
								seekBar1.setProgress(mediaPlayer.getCurrentPosition());
							}
						};
						timer.schedule(task, 0, 500);
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
			
			@Override
			public void surfaceChanged(SurfaceHolder holder, int format, int width,
					int height) {
				System.out.println("changed");
			}
		});
		
	}
	/**
	 * 播放
	 * @param view
	 */
	public void play(View view) {
		filepath = et_path.getText().toString().trim();
		File file = new File(filepath);
		if(file.exists()){
			try {
				mediaPlayer = new MediaPlayer();
				mediaPlayer.setDataSource(filepath);//设置播放的数据源。
				mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
				mediaPlayer.setDisplay(holder);
				mediaPlayer.prepare();//准备开始播放 播放的逻辑是c代码在新的线程里面执行。
				mediaPlayer.start();
				//设置拖动进度条的最大值
				int max = mediaPlayer.getDuration();
				seekBar1.setMax(max);
				timer = new Timer();
				task = new TimerTask() {
					@Override
					public void run() {
						seekBar1.setProgress(mediaPlayer.getCurrentPosition());
					}
				};
				timer.schedule(task, 0, 500);
				
				bt_play.setEnabled(false);
				mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
					@Override
					public void onCompletion(MediaPlayer mp) {
						bt_play.setEnabled(true);
					}
				});
			} catch (Exception e) {
				e.printStackTrace();
				Toast.makeText(this, "播放失败", 0).show();
			}
		}else{
			Toast.makeText(this, "文件不存在，请检查文件的路径", 0).show();
		}
	}
	/**
	 * 暂停
	 * @param view
	 */
	public void pause(View view) {
		if("继续".equals(bt_pause.getText().toString())){
			mediaPlayer.start();
			bt_pause.setText("暂停");
			return;
		}
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.pause();
			bt_pause.setText("继续");
		}
	}
	/**
	 * 停止
	 * @param view
	 */
	public void stop(View view) {
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.stop();
			mediaPlayer.release();
			mediaPlayer = null;
		}
		bt_pause.setText("暂停");
		bt_play.setEnabled(true);
	}
	/**
	 * 重播
	 * @param view
	 */
	public void replay(View view) {
		if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
			mediaPlayer.seekTo(0);
		}else{
			play(view);
		}
		bt_pause.setText("暂停");
	}

}

调用系统照相机录像和拍照

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.camera"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itheima.camera.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <Button
        android:onClick="click"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="拍照" />

    <ImageView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/iv"
        />
</LinearLayout>

package com.itheima.camera;

import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends Activity {
	private ImageView iv;
	private File file ;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		iv = (ImageView) findViewById(R.id.iv);
	}

	public void click(View view) {
		Intent intent = new Intent();
		// 指定拍照的意图。
		intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
		file =  new File(Environment.getExternalStorageDirectory(),System.currentTimeMillis()+".jpg");
		intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file)); // 指定保存文件的路径
		startActivityForResult(intent, 100);												
	}
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if(requestCode==100){
			iv.setImageURI(Uri.fromFile(file));
		}
		super.onActivityResult(requestCode, resultCode, data);
	}
}

照相机

偷拍神器

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.camera2"
    android:versionCode="1"
    android:versionName="1.0" >
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itheima.camera2.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <Button
        android:onClick="click"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="拍照" />

     <FrameLayout
         android:id="@+id/camera_preview"
         android:layout_width="100dip"
         android:layout_height="100dip"
         />

    <ImageView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/iv"
        />
</LinearLayout>

package com.itheima.camera2;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.os.Bundle;
import android.os.Environment;
import android.os.SystemClock;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {
	private ImageView iv;
	private Camera mCamera;
	private CameraPreview mPreview;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		iv = (ImageView) findViewById(R.id.iv);
		 // Create an instance of Camera
        mCamera = getCameraInstance();
        // Create our Preview view and set it as the content of our activity.
        mPreview = new CameraPreview(this, mCamera);
        FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
        preview.addView(mPreview);
	}
	public void click(View view){
		mCamera.autoFocus(new AutoFocusCallback() {
			@Override
			public void onAutoFocus(boolean success, Camera camera) {
				mCamera.takePicture(null, null, new PictureCallback() {
					@Override
					public void onPictureTaken(byte[] data, Camera camera) {
						try {
							File file = new File(Environment.getExternalStorageDirectory(),SystemClock.uptimeMillis()+".jpg");
							FileOutputStream fos = new FileOutputStream(file);
							fos.write(data);
							fos.close();
							Toast.makeText(getApplicationContext(), "成功", 0).show();
							mCamera.startPreview();
						} catch (Exception e) {
							e.printStackTrace();
						}
					}
				});
			}
		});
		
        
	}
	/** 获取一个照相机实例 */
	public static Camera getCameraInstance(){
	    Camera c = null;
	    try {
	        c = Camera.open(); // attempt to get a Camera instance
	    }
	    catch (Exception e){
	        // Camera is not available (in use or does not exist)
	    }
	    return c; // returns null if camera is unavailable
	}
	@Override
	protected void onDestroy() {
		mCamera.stopPreview();
		mCamera.release();
		mCamera = null;
		super.onDestroy();
	}
}

常见对话框

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.dialog"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itheima.dialog.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:onClick="click1"
        android:text="确定取消对话框" />

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:onClick="click2"
        android:text="单选对话框" />

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:onClick="click3"
        android:text="多选对话框" />
    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:onClick="click4"
        android:text="进度条对话框" />
    
      <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:onClick="click5"
        android:text="带进度的进度条对话框" />
</LinearLayout>

package com.itheima.dialog;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.DialogInterface.OnMultiChoiceClickListener;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}

	public void click1(View view){
		//对话框的创建器
		AlertDialog.Builder builder = new Builder(this);
		builder.setTitle("我是对话框");
		builder.setMessage("对话框显示的内容");
		builder.setPositiveButton("确定", new OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				Toast.makeText(getApplicationContext(), "确定被点击了", 0).show();
			}
		});
		builder.setNegativeButton("取消", new OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				//什么都不写默认实现就是关闭掉对话框
			}
		});
		builder.setCancelable(false);
		builder.create().show();
	}
	/**
	 * 单选对话框
	 * @param view
	 */
	public void click2(View view){
		//对话框的创建器
		AlertDialog.Builder builder = new Builder(this);
		builder.setTitle("请选择您的性别");
		final String[] items = {"男","女","未知"};
		builder.setSingleChoiceItems(items, 2, new OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				Toast.makeText(getApplicationContext(), "您的性别："+items[which], 0).show();
				dialog.dismiss();
			}
		});
		builder.create().show();
	}
	/**
	 * 多选对话框
	 * @param view
	 */
	public void click3(View view){
		//对话框的创建器
		AlertDialog.Builder builder = new Builder(this);
		builder.setTitle("请选择你最爱吃的水果");
		final String[] items={"苹果","梨","菠萝","香蕉","黄瓜"};
		final boolean[] result =new boolean[]{true,false,true,false,false};
		builder.setMultiChoiceItems(items, result, new OnMultiChoiceClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which, boolean isChecked) {
				Toast.makeText(getApplicationContext(), items[which]+isChecked, 0).show();
				result[which] = isChecked;
			}
		});
		builder.setPositiveButton("提交", new OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				StringBuffer sb = new StringBuffer();
				for(int i=0;i<result.length;i++){
					if(result[i]){
						sb.append(items[i]+",");
					}
				}
				Toast.makeText(getApplicationContext(), "您选中了，"+sb.toString(), 0).show();
			}
		});
		//builder.create().show();
		
		builder.show();
	}
	
	//进度条对话框
	public void click4(View view){
		ProgressDialog pd = new ProgressDialog(this);
		pd.setTitle("提醒");
		pd.setMessage("正在加载数据...请稍等。");
		pd.show();
	}
	//带进度的进度条对话框
	public void click5(View view){
		final ProgressDialog pd = new ProgressDialog(this);
		pd.setTitle("提醒");
		pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
		pd.setMax(100);
		pd.setMessage("正在加载数据...请稍等。");
		pd.show();
		new Thread(){
			public void run() {
				for(int i = 0;i<100;i++){
					try {
						Thread.sleep(40);
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
					pd.setProgress(i);
				}
				pd.dismiss();
			};
		}.start();
	}
}

notification通知

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.notification"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <uses-permission android:name="android.permission.CALL_PHONE"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itheima.notification.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <Button
        android:onClick="click"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="点击显示通知" />
<Button
        android:onClick="click2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="新版点击显示通知" />
    
</RelativeLayout>

package com.itheima.notification;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}
	public void click(View view){
		NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
		Notification notification = new Notification(R.drawable.notification, "我是一个通知", System.currentTimeMillis());
		notification.flags = Notification.FLAG_AUTO_CANCEL;
		Intent intent = new Intent();
		intent.setAction(Intent.ACTION_CALL);
		intent.setData(Uri.parse("tel:110"));
		PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, 0);
		notification.setLatestEventInfo(this, "我是标题", "我是内容", contentIntent);
		nm.notify(0, notification);
	}
	/**
	 * 新版本的notification
	 * @param view
	 */
	@SuppressLint("NewApi")
	public void click2(View view){
		 Notification noti = new Notification.Builder(this)
         .setContentTitle("我是标题")
         .setContentText("我是内容")
         .setSmallIcon(R.drawable.notification)
         .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher))
         .build();
		 NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
		 nm.notify(0, noti);
	}
}

样式和主题

样式和主题的区别，作用范围不同，样式都是作用在一个小控件，

主题作用一个activity，或者整个应用程序

样式都在布局文件里面配置，主题都在清单文件配置

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.styletheme"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:theme="@style/red_bg_theme"
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        >
        <activity
          
            android:name="com.itheima.styletheme.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

package com.itheima.styletheme;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

    <TextView
        style="@style/text_content_style"
        android:text="你好啊" />

</LinearLayout>

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <!--
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
    -->
    <style name="AppBaseTheme" parent="android:Theme.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>
    <style name="text_content_style">
        <item name="android:layout_width">wrap_content</item>
        <item name="android:layout_height">wrap_content</item>
        <item name="android:textColor">#0000ff</item>
        <item name="android:textSize">20sp</item>
    </style>
    
<!--     样式和主题的区别，作用范围不同，样式都是作用在一个小控件，
         主题作用一个activity，或者整个应用程序
  样式都在布局文件里面配置，主题都在清单文件配置   -->
     <style name="red_bg_theme">
         <item name="android:background">#33ff0000</item>
     </style>
    
</resources>

自定义样式和主题

D:\\tools\\AndroidSdk1119\\adt-bundle-windows-x86-20140702\\sdk\\platforms\\android-20\\data\\res\\values\\styles.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itheima.styleexample"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:theme="@style/BLUE_NoTitleBar.GREEN_NoTitleBar"
            android:name="com.itheima.styleexample.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<RelativeLayout xmlns:andro以上是关于黑马Android(11）音乐播放器/视频播放器/照相机/常见对话框/notification通知/样式和主题/帧动画/传感器/应用程序反编译与安装的主要内容，如果未能解决你的问题，请参考以下文章 
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