如何调用android的拍照或本地相册选取，然后再实现相片上传服务器
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参考技术A 首先是拍照:使用Intent即可，[java] view plaincopyprint?
01.final String start = Environment.getExternalStorageState();
02.private static final String PHOTOPATH = "/photo/";
03.
04.if(start.equals(Environment.MEDIA_MOUNTED))
05.Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
06.File file = new File(Environment.getExternalStorageDirectory()+PHOTOPATH);
07.if(!file.exists())
08.file.mkdirs();
09.
10.tempphontname = System.currentTimeMillis()+".jpg";
11.buffer.append(Environment.getExternalStorageDirectory()+PHOTOPATH).append(tempphontname);
12.intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(buffer.toString())));
13.startActivityForResult(intent, 1);
14.
final String start = Environment.getExternalStorageState();
private static final String PHOTOPATH = "/photo/";
if(start.equals(Environment.MEDIA_MOUNTED))
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File file = new File(Environment.getExternalStorageDirectory()+PHOTOPATH);
if(!file.exists())
file.mkdirs();
tempphontname = System.currentTimeMillis()+".jpg";
buffer.append(Environment.getExternalStorageDirectory()+PHOTOPATH).append(tempphontname);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(buffer.toString())));
startActivityForResult(intent, 1);
其次是从本地相册选：依旧是Intent.
如下代码：
[java] view plaincopyprint?
01.if(start.equals(Environment.MEDIA_MOUNTED))
02. Intent getImage = new Intent(Intent.ACTION_GET_CONTENT);
03. getImage.addCategory(Intent.CATEGORY_OPENABLE);
04. getImage.setType("image/jpeg");
05. startActivityForResult(getImage, 0);
06.
if(start.equals(Environment.MEDIA_MOUNTED))
Intent getImage = new Intent(Intent.ACTION_GET_CONTENT);
getImage.addCategory(Intent.CATEGORY_OPENABLE);
getImage.setType("image/jpeg");
startActivityForResult(getImage, 0);
接下来是主要的：因为调用完系统的方法后，回返回到回调方法onActivityResult(int, int, Intent)中，
在里面进行主要的照片上传服务器的操作，
见代码：
[java] view plaincopyprint?
01.@Override
02. protected void onActivityResult(int requestCode, int resultCode, Intent data)
03. ContentResolver resolver = getContentResolver();
04. if(requestCode==1)//
05.
06. if(resultCode==Activity.RESULT_OK)
07.
08. if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
09.
10.ew Thread(new Runnable()
11.
12. @Override
13. public void run()
14.//进行上传操作
15.
16..start();
转载本回答被提问者和网友采纳
Android获取本地相册图片拍照获取图片
需求：从本地相册找图片，或通过调用系统相机拍照得到图片。
容易出错的地方：
1，当我们指定了照片的uri路径，我们就不能通过data.getData();来获取uri，而应该直接拿到uri(用全局变量或者其他方式)然后设置给imageView
imageView.setImageURI(uri);
2，我发现手机前置摄像头拍出来的照片只有几百KB，直接用imageView.setImageURI(uri);没有很大问题，但是后置摄像头拍出来的照片比较大，这个时候使用imageView.setImageURI(uri);就容易出现 out of memory（oom）错误，我们需要先把URI转换为Bitmap,再压缩bitmap，然后通过imageView.setImageBitmap(bitmap);来显示图片。
3，将照片存放到SD卡中后，照片不能立即出现在系统相册中，因此我们需要发送广播去提醒相册更新照片。
4，这里用到了sharepreference，要注意用完之后移除缓存。
代码：
MainActivity:
package com.sctu.edu.test;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import com.sctu.edu.test.tools.ImageTools;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
private static final int PHOTO_FROM_GALLERY = 1;
private static final int PHOTO_FROM_CAMERA = 2;
private ImageView imageView;
private File appDir;
private Uri uriForCamera;
private Date date;
private String str = "";
private SharePreference sharePreference;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Android不推荐使用全局变量，我在这里使用了sharePreference
sharePreference = SharePreference.getInstance(this);
imageView = (ImageView) findViewById(R.id.imageView);
}
//从相册取图片
public void gallery(View view) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, PHOTO_FROM_GALLERY);
}
//拍照取图片
public void camera(View view) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
uriForCamera = Uri.fromFile(createImageStoragePath());
sharePreference.setCache("uri", String.valueOf(uriForCamera));
/**
* 指定了uri路径，startActivityForResult不返回intent，
* 所以在onActivityResult()中不能通过data.getData()获取到uri;
*/
intent.putExtra(MediaStore.EXTRA_OUTPUT, uriForCamera);
startActivityForResult(intent, PHOTO_FROM_CAMERA);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//第一层switch
switch (requestCode) {
case PHOTO_FROM_GALLERY:
//第二层switch
switch (resultCode) {
case RESULT_OK:
if (data != null) {
Uri uri = data.getData();
imageView.setImageURI(uri);
}
break;
case RESULT_CANCELED:
break;
}
break;
case PHOTO_FROM_CAMERA:
if (resultCode == RESULT_OK) {
Uri uri = Uri.parse(sharePreference.getString("uri"));
updateDCIM(uri);
try {
//把URI转换为Bitmap，并将bitmap压缩，防止OOM(out of memory)
Bitmap bitmap = ImageTools.getBitmapFromUri(uri, this);
imageView.setImageBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
removeCache("uri");
} else {
Log.e("result", "is not ok" + resultCode);
}
break;
default:
break;
}
}
/**
* 设置相片存放路径，先将照片存放到SD卡中，再操作
*
* @return
*/
private File createImageStoragePath() {
if (hasSdcard()) {
appDir = new File("/sdcard/testImage/");
if (!appDir.exists()) {
appDir.mkdirs();
}
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
date = new Date();
str = simpleDateFormat.format(date);
String fileName = str + ".jpg";
File file = new File(appDir, fileName);
return file;
} else {
Log.e("sd", "is not load");
return null;
}
}
/**
* 将照片插入系统相册，提醒相册更新
*
* @param uri
*/
private void updateDCIM(Uri uri) {
Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intent.setData(uri);
this.sendBroadcast(intent);
Bitmap bitmap = BitmapFactory.decodeFile(uri.getPath());
MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, "", "");
}
/**
* 判断SD卡是否可用
*
* @return
*/
private boolean hasSdcard() {
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
return true;
} else {
return false;
}
}
/**
* 移除缓存
*
* @param cache
*/
private void removeCache(String cache) {
if (sharePreference.ifHaveShare(cache)) {
sharePreference.removeOneCache(cache);
} else {
Log.e("this cache", "is not exist.");
}
}
}
ImageTools:
package com.sctu.edu.test.tools;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
public class ImageTools {
/**
* 通过uri获取图片并进行压缩
*
* @param uri
* @param activity
* @return
* @throws IOException
*/
public static Bitmap getBitmapFromUri(Uri uri, Activity activity) throws IOException {
InputStream inputStream = activity.getContentResolver().openInputStream(uri);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
options.inDither = true;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
BitmapFactory.decodeStream(inputStream, null, options);
inputStream.close();
int originalWidth = options.outWidth;
int originalHeight = options.outHeight;
if (originalWidth == -1 || originalHeight == -1) {
return null;
}
float height = 800f;
float width = 480f;
int be = 1; //be=1表示不缩放
if (originalWidth > originalHeight && originalWidth > width) {
be = (int) (originalWidth / width);
} else if (originalWidth < originalHeight && originalHeight > height) {
be = (int) (originalHeight / height);
}
if (be <= 0) {
be = 1;
}
BitmapFactory.Options bitmapOptinos = new BitmapFactory.Options();
bitmapOptinos.inSampleSize = be;
bitmapOptinos.inDither = true;
bitmapOptinos.inPreferredConfig = Bitmap.Config.ARGB_8888;
inputStream = activity.getContentResolver().openInputStream(uri);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream, null, bitmapOptinos);
inputStream.close();
return compressImage(bitmap);
}
/**
* 质量压缩方法
*
* @param bitmap
* @return
*/
public static Bitmap compressImage(Bitmap bitmap) {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);
int options = 100;
while (byteArrayOutputStream.toByteArray().length / 1024 > 100) {
byteArrayOutputStream.reset();
//第一个参数 ：图片格式 ，第二个参数： 图片质量，100为最高，0为最差 ，第三个参数：保存压缩后的数据的流
bitmap.compress(Bitmap.CompressFormat.JPEG, options, byteArrayOutputStream);
options -= 10;
}
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
Bitmap bitmapImage = BitmapFactory.decodeStream(byteArrayInputStream, null, null);
return bitmapImage;
}
}
AndroidMainfest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.sctu.edu.test"
xmlns:android="http://schemas.android.com/apk/res/android">
<uses-feature
android:name="android.hardware.camera"
android:required="true"
/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="com.miui.whetstone.permission.ACCESS_PROVIDER"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-feature android:name="android.hardware.camera.autofocus" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<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:background="#fff"
android:orientation="vertical"
tools:context="com.sctu.edu.test.MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="从图库找图片"
android:id="@+id/gallery"
android:onClick="gallery"
android:background="#ccc"
android:textSize="20sp"
android:padding="10dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="40dp"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="拍照获取图片"
android:id="@+id/camera"
android:onClick="camera"
android:background="#ccc"
android:textSize="20sp"
android:padding="10dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="40dp"
/>
<ImageView
android:layout_width="300dp"
android:layout_height="300dp"
android:id="@+id/imageView"
android:scaleType="fitXY"
android:background="@mipmap/ic_launcher"
android:layout_marginTop="40dp"
android:layout_marginLeft="30dp"
/>
</LinearLayout>
效果图：
或许有人会问，在Android6.0上面怎么点击拍照就出现闪退，那是因为我设置的最高SDK版本大于23，而我现在还没对运行时权限做处理，也许我会在下一篇博客里处理这个问题。谢谢浏览，希望对你有帮助！
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