registerForActivityResult能像ACTION_CHOOSER一样工作吗

Question

我正在使用registerForActivityResult来启动相机或画廊，但是registerForActivityResult能像Intent.ACTION_CHOOSER那样做吗？

cameraLauncher =
    registerForActivityResult(ActivityResultContracts.TakePicture()) { success ->
        if (success) {
           // do somthing
        }
    }
galleryLauncher =
    registerForActivityResult(ActivityResultContracts.GetContent()) {
          // do somthing
    }

以旧的方式

val galleryIntent = Intent(Intent.ACTION_GET_CONTENT)
galleryIntent.addCategory(Intent.CATEGORY_OPENABLE)
galleryIntent.type = "image/*"

val cameraIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)

val chooserIntent = Intent(Intent.ACTION_CHOOSER)
chooserIntent.putExtra(Intent.EXTRA_INTENT, galleryIntent)
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, arrayOf(cameraIntent))
startActivity(chooserIntent)

Answer 1

我确实通过实现ActivityResultContracts.StartActivityForResult()来实现它，它使用与so相同的参数调用现有的onActivityResult (Java中的示例)：

ActivityResultLauncher<Intent> activityForResult = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback<ActivityResult>() {
    @Override
    public void onActivityResult(ActivityResult result) {
        YourActivity.this.onActivityResult(PICK_IMAGE_ID, result.getResultCode(), result.getData());
    }
});

然后，您只需按如下方式开始：

Intent pickIntent = new Intent(Intent.ACTION_PICK,     
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
takePhotoIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageURI);
Intent chooserIntent = Intent.createChooser(pickIntent, "Choose");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[]{takePhotoIntent});
if(SDK_INT > Build.VERSION_CODES.Q) {
   activityForResult.launch(chooserIntent);
} else {
   //support for older than android 11
   startActivityForResult(chooserIntent, PICK_IMAGE_ID);
}

您的AndroidManifest.xml还需要以下查询：

<queries>
    <intent>
        <action android:name="android.media.action.IMAGE_CAPTURE" />
    </intent>
    <intent>
        <action android:name="android.intent.action.PICK" />
        <data android:mimeType="image/*" />
    </intent>
</queries>

请注意，startActivityForResult和onActivityResult已被弃用，并将在将来的某个时候删除。