在 android 上使用 com.android.camera.action.CROP 裁剪保存的图像

我读过很多关于此的问题，但我仍然无法使用此代码...也许任何人都可以纠正我的代码...我想从我知道使用 com.android.camera.action.CROP 位置的文件中裁剪图像像这样...

    mImageCaptureUri = Uri.fromFile(f);
    Intent intent = new Intent("com.android.camera.action.CROP");
    intent.setType("image/*");

    intent.setData(mImageCaptureUri); 
    intent.putExtra("crop", true);
    intent.putExtra("outputX", 200);
    intent.putExtra("outputY", 200);
    intent.putExtra("aspectX", 1);
    intent.putExtra("aspectY", 1);
    intent.putExtra("scale", true);
    intent.putExtra("return-data", true);

    Bundle extras = intent.getExtras();

    if (extras != null) {               
        Bitmap photo = extras.getParcelable("intent");

        tampilan.setImageBitmap(photo);
    }

    File f = new File(mImageCaptureUri.getPath());            

    if (f.exists()) f.delete();

但是当我运行代码时，什么也没有发生......T.T 谁能帮我？？

我修改了我的代码并且它成功运行，这是我的代码..

Intent intent = new Intent("com.android.camera.action.CROP");
    intent.setType("image/*");
    List<ResolveInfo> list = getPackageManager().queryIntentActivities( intent, 0 );
    int size = list.size();
    if (size == 0) {            
        Toast.makeText(this, "Can not find image crop app", Toast.LENGTH_SHORT).show();

        return;
    } else {
        intent.setData(selectImageUri);        
        intent.putExtra("outputX", 300);
        intent.putExtra("outputY", 300);
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        intent.putExtra("scale", true);
        intent.putExtra("return-data", true);
        if (size == 1) {
            Intent i        = new Intent(intent);
            ResolveInfo res = list.get(0);

            i.setComponent( new ComponentName(res.activityInfo.packageName, res.activityInfo.name));

            startActivityForResult(i, CROP_RESULT);
        } else {

        }

    }

和 ActivityResult 像这样

if (resultCode == RESULT_OK){
        switch (requestCode){
        case SELECT_PICTURE :
            selectImageUri = data.getData();
            doCrop();
        break;
        case CROP_RESULT :
            Bundle extras = data.getExtras();

            if (extras != null) {               
                bmp = extras.getParcelable("data");
                temporary.setBitmap(bmp);

            }
            File f = new File(selectImageUri.getPath());            

            if (f.exists()) f.delete();
            Intent inten3 = new Intent(this, tabActivity.class);
            startActivity(inten3);
        break;
        case CAMERA_IMAGE :
            doCrop();
        break;
        }
    }

也许它有用：D