从我的 Android 应用程序中的图片应用程序访问图片 [英] Access pictures from Pictures app in my android app

问题描述

就像 iPhone 有一个 UIImagePickerController 来让用户访问存储在设备上的图片，我们在 Android SDK 中有类似的控件吗?

Just like the iPhone has a UIImagePickerController to let the user access pictures stored on the device, do we have a similar control in the Android SDK?

谢谢.

推荐答案

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.

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