安卓开发选择图片并裁剪

 chooseFromAlbum.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                File outputImage = new File(Environment.getExternalStorageDirectory(),
                        "output_image.jpg");
                try {
                    if (outputImage.exists()) {
                        outputImage.delete();
                    }
                    outputImage.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                imageUri = Uri.fromFile(outputImage);
                Intent intent = new Intent(Intent.ACTION_PICK,null);
                //此处调用了图片选择器
                //如果直接写intent.setDataAndType("image/*");
                //调用的是系统图库
                intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
                intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                startActivityForResult(intent, CUT_PICTURE);
            }
        });

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case CUT_PICTURE:
                if (resultCode == RESULT_OK) {
                    //此处启动裁剪程序
                    Intent intent = new Intent("com.android.camera.action.CROP");
                    intent.setDataAndType(data.getData(), "image/*");
                    intent.putExtra("scale", true);
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                    startActivityForResult(intent, SHOW_PICTURE);
                }
                break;
            case SHOW_PICTURE:
                if (resultCode == RESULT_OK) {
                    try {
                        //将output_image.jpg对象解析成Bitmap对象，然后设置到ImageView中显示出来
                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver()
                                .openInputStream(imageUri));
                        picture.setImageBitmap(bitmap);
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                }
                break;
            default:
                break;
        }
    }