android调用系统相机拍照并裁剪

public class WelcomActivity extends Activity {
/** Called when the activity is first created. */
private Button btnTake = null;
private ImageView lblImage = null;


private static final int PHOTO_PICKED_WITH_DATA = 3021;
private static final int CAMERA_WITH_DATA = 3023;


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);


btnTake = (Button) findViewById(R.id.btnTake);
lblImage = (ImageView) findViewById(R.id.lblImage);
btnTake.setOnClickListener(new View.OnClickListener() {


@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_WITH_DATA);
}
});


}


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if (resultCode != RESULT_OK)
return;
switch (requestCode) {
case CAMERA_WITH_DATA:
final Bitmap photo = data.getParcelableExtra("data");
if (photo != null) {
doCropPhoto(photo);
}
case PHOTO_PICKED_WITH_DATA:
Bitmap photo1 = data.getParcelableExtra("data");
if (photo1 != null) {
lblImage.setImageBitmap(photo1);
}


}
}


protected void doCropPhoto(Bitmap data) {
Intent intent = getCropImageIntent(data);
startActivityForResult(intent, PHOTO_PICKED_WITH_DATA);
}


public static Intent getCropImageIntent(Bitmap data) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setType("image/*");
intent.putExtra("data", data);
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 128);
intent.putExtra("outputY", 128);
intent.putExtra("return-data", true);
return intent;
}
}