我向用户展示了一个选择器，让用户在图库或相机之间进行选择以选择照片。如果我选择相机，那么一旦相机加载完毕，我会旋转拍摄一张风景照片，拍摄照片并单击完成，它会返回到我的应用程序，但返回的图像为空。如果我不旋转相机，图像会很好地返回。我错过了什么？我知道轮换会导致 Activity 被重建，但为什么 onActivityResult 不包含正确的信息？这是我的 openImage 意图：
public void openImageIntent() {
// Determine Uri of camera image to save.
final File root = new File(Environment.getExternalStorageDirectory() + File.separator + "MyAppImages"
+ File.separator);
root.mkdirs();
SimpleDateFormat sdf = new SimpleDateFormat("ddMMyy-hhmmss");
final String fname = String.format("%s.jpg", sdf.format(new Date()));
final File sdImageMainDirectory = new File(root, fname);
outputFileUri = Uri.fromFile(sdImageMainDirectory);
// Camera.
final List<Intent> cameraIntents = new ArrayList<Intent>();
final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
final PackageManager packageManager = getPackageManager();
final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
for (ResolveInfo res : listCam) {
final String packageName = res.activityInfo.packageName;
final Intent intent = new Intent(captureIntent);
intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
intent.setPackage(packageName);
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
cameraIntents.add(intent);
}
// Filesystem.
final Intent galleryIntent = new Intent();
galleryIntent.setType("image/*");
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
// Chooser of filesystem options.
final Intent chooserIntent = Intent.createChooser(galleryIntent, "Select Source");
// Add the camera options.
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[] {}));
startActivityForResult(chooserIntent, SELECT_PICTURE_REQUEST);
}
和 onActivityResult 方法：
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE_REQUEST) {
final boolean isCamera;
if (data == null) {
isCamera = true;
} else {
final String action = data.getAction();
if (action == null) {
isCamera = false;
} else {
isCamera = true;
}
}
Uri selectedImageUri;
if (isCamera) {
selectedImageUri = outputFileUri;
} else {
selectedImageUri = data == null ? null : data.getData();
}
if (imageDelegate != null) {
Log.e(TAG, "imageDelegate not null: " + imageDelegate);
imageDelegate.gotNewImageUri(selectedImageUri);
imageDelegate = null;
} else if (getSupportFragmentManager().findFragmentByTag("addofferdialog") != null) {
imageDelegate = (AddOfferFragment) getSupportFragmentManager().findFragmentByTag("addofferdialog");
Log.e(TAG, "imageDelegate is null but found fragment: " + imageDelegate);
Log.e(TAG, "Activity image: " + selectedImageUri);
imageDelegate.gotNewImageUri(selectedImageUri);
imageDelegate = null;
} else {
Log.e(TAG, "cannot find imageDelegate!!!!");
}
Log.e(TAG, "selectedImageUri: " + selectedImageUri);
}
}
}