Android 选择图片 相册选择 马上拍照

public class MainActivity extends Activity implements OnClickListener {     private ImageView iv;   private int SELECT_PICTURE = 1; // 从图库中选择图片   private int SELECT_CAMER = 2; // 用相机拍摄照片   private Bitmap bmp;     @Override   protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);      init();     }     private void init() {    iv = (ImageView) findViewById(R.id.imageView1);    iv.setOnClickListener(this);   }     @Override   protected void onActivityResult(int requestCode, int resultCode, Intent data) {    // TODO Auto-generated method stub    super.onActivityResult(requestCode, resultCode, data);    if (resultCode == RESULT_OK) {     Uri uri = data.getData();     ContentResolver cr = this.getContentResolver();     try {      if (bmp != null) {       bmp.recycle();       bmp = BitmapFactory.decodeStream(cr.openInputStream(uri));      }     } catch (FileNotFoundException e) {      // TODO Auto-generated catch block      e.printStackTrace();     }     iv.setImageURI(uri);    } else {     Toast.makeText(MainActivity.this, "选择图片失败,请重新选择", Toast.LENGTH_SHORT)       .show();    }   }     @Override   public void onClick(View v) {    // TODO Auto-generated method stub    switch (v.getId()) {    case R.id.imageView1:     showChoosePhotoDialog();     break;      default:     break;    }   }     private void showChoosePhotoDialog() {    CharSequence[] items = { "相册", "相机" };    AlertDialog dialog = new AlertDialog.Builder(this)      .setTitle("选择图片来源")      .setItems(items, new DialogInterface.OnClickListener() {         @Override       public void onClick(DialogInterface dialog, int which) {        // TODO Auto-generated method stub        if (which == SELECT_PICTURE) {         Intent intent = new Intent(           MediaStore.ACTION_IMAGE_CAPTURE);         startActivityForResult(intent, SELECT_CAMER);        } else {         Intent intent = new Intent(           Intent.ACTION_GET_CONTENT);         intent.addCategory(Intent.CATEGORY_OPENABLE);         intent.setType("image/*");         startActivityForResult(intent, SELECT_PICTURE);        }       }      })      .setNegativeButton("取消", new DialogInterface.OnClickListener() {         @Override       public void onClick(DialogInterface dialog, int which) {        // TODO Auto-generated method stub        dialog.cancel();       }      }).create();    dialog.show();   }    }