手机图片获取、裁剪、上传

/** * 图片获取、裁剪、上传 * @author jiatao * */public class MainActivity extends Activity {private String TAG = "MainActivity";private static int CAMERA_REQUEST_CODE = 1;private static int ALBUM_REQUEST_CODE = 2;private static int CROP_REQUEST_CODE = 3;private ImageView iv_pic;private Button btn_camera, btn_album;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();}private void initView() {iv_pic = (ImageView) findViewById(R.id.iv_pic);btn_camera = (Button) findViewById(R.id.btn_camera);btn_album = (Button) findViewById(R.id.btn_album);btn_camera.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);startActivityForResult(intent, CAMERA_REQUEST_CODE);}});btn_album.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent(Intent.ACTION_GET_CONTENT);intent.setType("image/*");startActivityForResult(intent, ALBUM_REQUEST_CODE);}});}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if(requestCode == CAMERA_REQUEST_CODE){if(data == null){return;}else{Bundle extras = data.getExtras();if(extras != null){Bitmap bm = extras.getParcelable("data");//iv_pic.setImageBitmap(bm);Uri uri = saveBitmap(bm);startImageZoom(uri);}}}else if(requestCode == ALBUM_REQUEST_CODE){if(data == null){//如果用户没有选择图片，返回return;}Uri uri;uri = data.getData();//有两种Uri,判断现在获取的是哪一种：content类型的uri不能直接进行复制操作；file类型的uri能直接进行复制操作；Log.e(TAG, uri.toString());Uri fileUri = convertUri(uri);//iv_pic.setImageURI(fileUri); startImageZoom(fileUri);}else if(requestCode == CROP_REQUEST_CODE)        {            if(data == null)            {                return;            }            Bundle extras = data.getExtras();            if(extras == null){                return;            }            Bitmap bm = extras.getParcelable("data");            iv_pic.setImageBitmap(bm);//            sendImage(bm);//向服务器上传图片        }}/** * 传入content类型的uri，返回file类型的uri */private Uri convertUri(Uri uri){InputStream is = null;try {is = getContentResolver().openInputStream(uri);Bitmap bm = BitmapFactory.decodeStream(is);is.close();return saveBitmap(bm);//将Bitmap文件转为file类型的uri} catch (FileNotFoundException e) {e.printStackTrace();return null;} catch (IOException e) {e.printStackTrace();return null;}}/** * 传入Bitmap，返回file类型的uri */private Uri saveBitmap(Bitmap bm){//获得图片在SD卡中保存的文件夹目录，如果文件夹不存在，则创建这个文件夹File tmpDir = new File(Environment.getExternalStorageDirectory() + "/com.jiatao.avater");        if(!tmpDir.exists())        {            tmpDir.mkdir();        }        //创建要保存的图片对象        File img = new File(tmpDir.getAbsolutePath() + "avater.png");        try {            FileOutputStream fos = new FileOutputStream(img);            bm.compress(Bitmap.CompressFormat.PNG, 85, fos);//图片格式、压缩比例、图片源            fos.flush();//刷新输出流            fos.close();//关闭输出流            return Uri.fromFile(img);//从写入的文件中返回一个file类型的uri作为返回值返回        } catch (FileNotFoundException e) {            e.printStackTrace();            return null;        } catch (IOException e) {            e.printStackTrace();            return null;        }}/** * 裁剪图片 */private void startImageZoom(Uri uri)    {        Intent intent = new Intent("com.android.camera.action.CROP");        intent.setDataAndType(uri, "image/*");        intent.putExtra("crop", "true");        intent.putExtra("aspectX", 1);        intent.putExtra("aspectY", 1);        intent.putExtra("outputX", 150);        intent.putExtra("outputY", 150);        intent.putExtra("return-data", true);        startActivityForResult(intent, CROP_REQUEST_CODE);    }/** * 上传图片 */private void sendImage(Bitmap bm)    {        ByteArrayOutputStream stream = new ByteArrayOutputStream();        bm.compress(Bitmap.CompressFormat.PNG, 60, stream);        byte[] bytes = stream.toByteArray();        String img = new String(Base64.encodeToString(bytes, Base64.DEFAULT));//要上传的参数        //调用接口上传图片即可            }}

activity_main.xml

<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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.cctvjiatao.screenshots.MainActivity" >    <ImageView        android:id="@+id/iv_pic"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="28dp"        android:src="@drawable/ic_launcher" />    <Button        android:id="@+id/btn_camera"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/iv_pic"        android:layout_centerHorizontal="true"        android:text="拍照" />    <Button        android:id="@+id/btn_album"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/btn_camera"        android:layout_below="@+id/btn_camera"        android:text="相册" /></RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.cctvjiatao.screenshots"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="14"        android:targetSdkVersion="21" />        <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".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>