您可以使用startActivityForResult，传入一个 Intent 来描述您想要完成的操作以及执行该操作的数据源.

You can usestartActivityForResult, passing in an Intent that describes an action you want completed and and data source to perform the action on.

幸运的是，Android 包含一个用于挑选东西的 Action:Intent.ACTION__PICK 和一个包含图片的数据源:android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI 用于本地设备上的图像或android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI 用于 SD 卡上的图像.

Luckily for you, Android includes an Action for picking things: Intent.ACTION__PICK and a data source containing pictures: android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI for images on the local device or android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI for images on the SD card.

调用 startActivityForResult 传入选择操作和您希望用户从中选择的图像，如下所示:

Call startActivityForResult passing in the pick action and the images you want the user to select from like this:

startActivityForResult(new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI), SELECT_IMAGE);

然后覆盖 onActivityResult 以监听用户进行了选择.

Then override onActivityResult to listen for the user having made a selection.

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  if (requestCode == SELECT_IMAGE)
    if (resultCode == Activity.RESULT_OK) {
      Uri selectedImage = data.getData();
      // TODO Do something with the select image URI
    } 
}

获得图像 Uri 后，您可以使用它来访问图像并执行任何您需要的操作.

Once you have the image Uri you can use it to access the image and do whatever you need to do with it.