黑马安全卫士

Posted 2020-06-22 笔记

SplashActivity.java

package com.itheima62.mobileguard.activities;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.view.Menu;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.itheima62.mobileguard.R;
import com.itheima62.mobileguard.domain.UrlBean;
import com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;

public class SplashActivity extends Activity {

    private static final int LOADMAIN = 1;//加载主界面
    private static final int SHOWUPDATEDIALOG = 2;//显示是否更新的对话框
    protected static final int ERROR = 3;//错误统一代号
    private RelativeLayout rl_root;// 界面的根布局组件
    private int versionCode;// 版本号
    private String versionName;// 版本名
    private TextView tv_versionName;// 显示版本名的组件
    private UrlBean parseJson;//url信息封装bean
    private long startTimeMillis;//记录开始访问网络的时间
    private ProgressBar pb_download;//下载最新版本apk的进度条

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 初始化界面
        initView();
        // 初始化数据
        initData();
        // 初始化动画
        initAnimation();
        // 检测服务器的版本
        checkVerion();

    }

    private void initData() {
        // 获取自己的版本信息
        PackageManager pm = getPackageManager();
        try {
            PackageInfo packageInfo = pm.getPackageInfo(getPackageName(), 0);
            // 版本号            
            versionCode = packageInfo.versionCode;
            // 版本名        
            versionName = packageInfo.versionName;

            // 设置textview
            tv_versionName.setText(versionName);
        } catch (NameNotFoundException e) {
            // can not reach 异常不会发生
        }
    }

    private void checkVerion() {
        // 耗时操作都要放到子线程中执行
        new Thread(new Runnable() {

            

            

            @Override
            public void run() {
                BufferedReader bfr = null;
                HttpURLConnection conn = null;
                int errorCode = -1;//正常，没有错误
                try {
                    startTimeMillis = System.currentTimeMillis();
                    
                    URL url = new URL("http://10.0.2.2:8080/guardversion.json");
                    conn = (HttpURLConnection) url
                            .openConnection();
                    // 读取数据的超时时间
                    conn.setReadTimeout(5000);
                    // 网络连接超时
                    conn.setConnectTimeout(5000);
                    // 设置请求方式
                    conn.setRequestMethod("GET");
                    // 获取相应结果
                    int code = conn.getResponseCode();
                    
                    if (code == 200) {// 数据获取成功
                        // 获取读取的字节流
                        InputStream is = conn.getInputStream();
                        // 把字节流转换成字符流
                        bfr = new BufferedReader(
                                new InputStreamReader(is));
                        // 读取一行信息
                        String line = bfr.readLine();
                        // json字符串数据的封装
                        StringBuilder json = new StringBuilder();
                        while (line != null) {
                            json.append(line);
                            line = bfr.readLine();
                        }
                        parseJson = parseJson(json);//返回数据封装信息
    
                    } else {
                        errorCode = 404;
                    }
                } catch (MalformedURLException e) {//4002
                    errorCode = 4002;
                    e.printStackTrace();
                } catch (IOException e) {// 4001
                    // TODO Auto-generated catch block
                    //
                    errorCode = 4001;
                    e.printStackTrace();
                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    errorCode = 4003;
                    e.printStackTrace();
                } finally {
                    /*if (errorCode == -1){
                        isNewVersion(parseJson);// 是否有新版本
                    } else {
                        Message msg = Message.obtain();
                        msg.what = ERROR;
                        msg.arg1 = errorCode;
                        handler.sendMessage(msg);//发送错误信息
                    }*/
                    Message msg = Message.obtain();
                    if (errorCode == -1){
                        msg.what = isNewVersion(parseJson);//检测是否有新版本
                    } else {
                        msg.what = ERROR;
                        msg.arg1 = errorCode;
                    }
                    long endTime = System.currentTimeMillis();
                    if (endTime - startTimeMillis < 3000){
                        SystemClock.sleep(3000 - (endTime - startTimeMillis));//时间不超过3秒，补足3秒
                    }
                    handler.sendMessage(msg);//发送消息
                    try {
                        //关闭连接资源
                        if (bfr == null || conn == null){
                            return;
                        }
                        bfr.close();
                        conn.disconnect();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    
                }

            }
        }).start();
    }
    
    private Handler handler = new Handler(){
        public void handleMessage(android.os.Message msg) {
            //处理消息
            switch (msg.what) {
            case LOADMAIN://加载主界面
                loadMain();
                break;
            case ERROR://有异常
                switch (msg.arg1) {
                case 404://资源找不到
                    Toast.makeText(getApplicationContext(), "404资源找不到", 0).show();
                    break;
                case 4001://找不到网络
                    Toast.makeText(getApplicationContext(), "4001没有网络", 0).show();
                    break;
                case 4003://json格式错误
                    Toast.makeText(getApplicationContext(), "4003json格式错误", 0).show();
                    break;
                default:
                    break;
                }
                loadMain();//进入主界面
                break;
            case SHOWUPDATEDIALOG://显示更新版本的对话框
                showUpdateDialog();
                break; 
            default:
                break;
            }
        }

    };
    

    private void loadMain() {
        Intent intent = new Intent(SplashActivity.this,HomeActivity.class);
        startActivity(intent);//进入主界面
        finish();//关闭自己
    };
    /**
     * 在子线程中执行
     * @param parseJson
     */
    protected int isNewVersion(UrlBean parseJson) {
        int serverCode = parseJson.getVersionCode();// 获取服务器的版本
        
        if (serverCode == versionCode){//版本一致
            return LOADMAIN;
            /*//进入主界面
            Message msg = Message.obtain();
            msg.what = LOADMAIN;
            handler.sendMessage(msg);*/
        } else {//有新版本  
            return SHOWUPDATEDIALOG;
        }
    }



    /**
     * 显示是否更新新版本的对话框
     */
    protected void showUpdateDialog() {
        // TODO Auto-generated method stub
        //对话框的上下文 是Activity的class,AlertDialog是Activity的一部分
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        //让用户禁用取消操作
        //builder.setCancelable(false);
        builder.setOnCancelListener(new OnCancelListener() {
            
            @Override
            public void onCancel(DialogInterface dialog) {
                //取消的事件处理
                //进入主界面
                loadMain();
            }
        })
               .setTitle("提醒")
               .setMessage("是否更新新版本？新版本的具有如下特性：" + parseJson.getDesc())
               .setPositiveButton("更新", new OnClickListener() {
                
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    //更新apk
                    System.out.println("更新apk");
                    //访问网络，下载新的apk
                    downLoadNewApk();//下载新版本
                }
            }).setNegativeButton("取消", new OnClickListener() {
                
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    //进入主界面
                    loadMain();
                }
            });
        builder.show();//显示对话框
    }

    /**
     * 新版本的下载安装
     */
    protected void downLoadNewApk() {
        HttpUtils utils = new HttpUtils();
        //parseJson.getUrl() 下载的url
        // target  本地路径
        System.out.println(parseJson.getUrl());
        //先删除掉xx.apk
        File file = new File("/mnt/sdcard/xx.apk");
        file.delete();//删除文件
        utils.download(parseJson.getUrl(), "/mnt/sdcard/xx.apk", new RequestCallBack<File>() {
            
            @Override
            public void onLoading(long total, long current, boolean isUploading) {
                // TODO Auto-generated method stub
                pb_download.setVisibility(View.VISIBLE);//设置进度的显示
                pb_download.setMax((int) total);//设置进度条的最大值
                pb_download.setProgress((int) current);//设置当前进度
                super.onLoading(total, current, isUploading);
            }

            @Override
            public void onSuccess(ResponseInfo<File> arg0) {
                // TODO Auto-generated method stub
                //下载成功
                //在主线程中执行
                Toast.makeText(getApplicationContext(), "下载新版本成功", 1).show();
                //安装apk
                installApk();//安装apk
                pb_download.setVisibility(View.GONE);//隐藏进度条
            }
            
            @Override
            public void onFailure(HttpException arg0, String arg1) {
                // TODO Auto-generated method stub
                //下载失败
                Toast.makeText(getApplicationContext(), "下载新版本失败", 1).show();
                pb_download.setVisibility(View.GONE);//隐藏进度条
            }
        });
    }

    /**
     * 安装下载的新版本
     */
    protected void installApk() {
        /*<intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <data android:scheme="content" />
        <data android:scheme="file" />
        <data android:mimeType="application/vnd.android.package-archive" />
    </intent-filter>*/
        Intent intent = new Intent("android.intent.action.VIEW");
        intent.addCategory("android.intent.category.DEFAULT");
        String type = "application/vnd.android.package-archive";
        Uri data = Uri.fromFile(new File("/mnt/sdcard/xx.apk"));
        intent.setDataAndType(data , type);
        startActivityForResult(intent,0);
        
        
    }
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        //如果用户取消更新apk，那么直接进入主界面
        loadMain();
        super.onActivityResult(requestCode, resultCode, data);
    }

    /**
     * @param jsonString
     *            url的json数据
     * @return url信息封装对象
     * @throws JSONException 
     */
    protected UrlBean parseJson(StringBuilder jsonString) throws JSONException {
        UrlBean bean = new UrlBean();
        JSONObject jsonObj;
        
        // {"version":"2","url":"http://10.0.2.2:8080/xxx.apk","desc":"增加了防病毒功能"}
        jsonObj = new JSONObject(jsonString + "");
        int versionCode = jsonObj.getInt("version");
        String url = jsonObj.getString("url");
        String desc = jsonObj.getString("desc");
        // 封装结果数据
        bean.setDesc(desc);
        bean.setUrl(url);
        bean.setVersionCode(versionCode);
        

        return bean;
    }

    /**
     * 初始化界面
     */
    private void initView() {
        setContentView(R.layout.activity_main);
        rl_root = (RelativeLayout) findViewById(R.id.rl_splash_root);
        tv_versionName = (TextView) findViewById(R.id.tv_splash_version_name);
        pb_download = (ProgressBar) findViewById(R.id.pb_splash_download_progress);
    }

    /**
     * 动画显示
     */
    private void initAnimation() {
        // showAlpha();
        // Alpha动画0.0完全透明
        AlphaAnimation aa = new AlphaAnimation(0.0f, 1.0f);
        // 设置动画播放的时间 毫秒为单位
        aa.setDuration(3000);
        // 界面停留在动画结束状态
        aa.setFillAfter(true);

        RotateAnimation rotate = new RotateAnimation(0, 360,
                // 设置锚点
                Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
                0.5f);
        // 显示时间
        rotate.setDuration(3000);
        // 界面停留在结束状态
        rotate.setFillAfter(true);

        ScaleAnimation sa = new ScaleAnimation(0.0f, 1.0f, 0.0f, 1.0f,
                // 设置锚点
                Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
                0.5f);
        // 显示时间
        sa.setDuration(3000);
        // 界面停留在结束状态
        sa.setFillAfter(true);

        // 创建动画
        AnimationSet as = new AnimationSet(true);

        as.addAnimation(sa);
        as.addAnimation(rotate);
        as.addAnimation(aa);
        // 同时播放动画
        rl_root.startAnimation(as);

    }

    /**
     * Alpha显示
     */
    private void showAlpha() {
        // Alpha动画0.0完全透明
        AlphaAnimation aa = new AlphaAnimation(0.0f, 1.0f);
        // 设置动画播放的时间毫秒为单位
        aa.setDuration(3000);
        // 界面停留在动画结束状态
        aa.setFillAfter(true);
        // 给组件设置动态
        rl_root.startAnimation(aa);
    }

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

}

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