Intent intent = new Intent(MainActivity.this, PhotoPickerActivity.class);//图片选择页面
intent.putExtra(PhotoPickerActivity.EXTRA_SHOW_CAMERA, showCamera);//是否显示相机按钮
intent.putExtra(PhotoPickerActivity.EXTRA_SELECT_MODE, selectedMode);//选择模式：单选 | 多选
intent.putExtra(PhotoPickerActivity.EXTRA_MAX_MUN, maxNum);//多选模式最大选择图片数
startActivityForResult(intent, PICK_PHOTO);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == PICK_PHOTO){
        if(resultCode == RESULT_OK){
            ArrayList<String> result = data.getStringArrayListExtra(PhotoPickerActivity.KEY_RESULT);//如果模式是单选，集合只有一条记录
           //do what you want to to.
        }
    }
}