我最近发现onActivityResult已弃用。我们该怎么处理呢?
有什么替代方案吗?
我最近发现onActivityResult已弃用。我们该怎么处理呢?
有什么替代方案吗?
当前回答
在Java 8中,它可以这样写:
ActivityResultLauncher<Intent> startActivityForResult = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
result -> {
if (result.getResultCode() == AppCompatActivity.RESULT_OK) {
Intent data = result.getData();
// ...
}
}
);
Intent intent = new Intent( ... );
startActivityForResult.launch(intent);
其他回答
这就是我如何替换多个requestCodes(把这段代码放在你的活动中):
ActivityResultLauncher<Intent> launchCameraActivity = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result) {
if (result.getResultCode() == Activity.RESULT_OK) {
Intent data = result.getData();
Bitmap photoBitmap;
if(data != null && data.getExtras() != null){
photoBitmap = (Bitmap) data.getExtras().get("data");
if (photoBitmap != null) {
dataModel.setPhoto(ImageUtil.convert(photoBitmap));
imageTaken.setVisibility(View.VISIBLE);
imageTaken.setImageBitmap(photoBitmap);
}
}
}
}
});
ActivityResultLauncher<Intent> launchCameraAndGalleryActivity = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result) {
if (result.getResultCode() == Activity.RESULT_OK) {
Intent data = result.getData();
Uri imageUri;
if (data != null) {
imageUri = data.getData();
InputStream imageStream;
try {
imageStream = getContentResolver().openInputStream(imageUri);
Bitmap photoBitmap = BitmapFactory.decodeStream(imageStream);
dataModel.setOtherImage(ImageUtil.convert(photoBitmap));
documentImageTaken.setVisibility(View.VISIBLE);
documentImageTaken.setImageBitmap(photoBitmap);
}catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
}
});
我是这样开展活动的:
Intent photoIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
launchCameraAndGalleryActivity.launch(photoIntent );
Intent galleryIntent= new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
launchCameraActivity.launch(galleryIntent);
在Java 8中,它可以这样写:
ActivityResultLauncher<Intent> startActivityForResult = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
result -> {
if (result.getResultCode() == AppCompatActivity.RESULT_OK) {
Intent data = result.getData();
// ...
}
}
);
Intent intent = new Intent( ... );
startActivityForResult.launch(intent);
在芬兰湾的科特林 我改变了我的代码
startActivityForResult(intent, Constants.MY_CODE_REQUEST)
and
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
super.onActivityResult(requestCode, resultCode, data)
if (resultCode == Activity.RESULT_OK) {
when (requestCode) {
Constants.MY_CODE_REQUEST -> {
...
}
to
registerForActivityResult(StartActivityForResult()) { result ->
onActivityResult(Constants.MY_CODE_REQUEST, result)
}.launch(intent)
and
private fun onActivityResult(requestCode: Int, result: ActivityResult) {
if(result.resultCode == Activity.RESULT_OK) {
val intent = result.data
when (requestCode) {
Constants.MY_CODE_REQUEST -> {
...
我希望这对你有用。: D
在替换已弃用的方法startActivityForResult(…)时,需要遵循4个简单的步骤。
In place of overridden method onActivityResult(..) - ActivityResultLauncher<Intent> activityResultLaunch = registerForActivityResult( new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback<ActivityResult>() { @Override public void onActivityResult(ActivityResult result) { if (result.getResultCode() == 123) { // ToDo : Do your stuff... } else if(result.getResultCode() == 321) { // ToDo : Do your stuff... } } });
对于多个自定义请求,将条件附加为
if (result.getResultCode() == 123) {
..
} else if(result.getResultCode() == 131){
..
} // so on..
Imports : import androidx.activity.result.ActivityResult; import androidx.activity.result.ActivityResultCallback; import androidx.activity.result.ActivityResultLauncher; import androidx.activity.result.contract.ActivityResultContracts; In place of startActivityForResult(intent, 123), use Intent intent = new Intent(this, SampleActivity.class); activityResultLaunch.launch(intent); In SampleActivity.java class, while returning back to source activity, code will remain the same like - Intent intent = new Intent(); setResult(123, intent); finish();
编码快乐!:)
您可以为Koltin使用扩展函数。例如:
//random utils file
fun Fragment.buildGetContentRequest(function: (Uri) -> Unit): ActivityResultLauncher<String> {
return this.registerForActivityResult(ActivityResultContracts.GetContent()) {
function(it)
}
}
fun Fragment.buildTakePhotoRequest(function: (Boolean) -> Unit): ActivityResultLauncher<Uri> {
return this.registerForActivityResult(ActivityResultContracts.TakePicture()) {
function(it)
}
}
fun Fragment.buildSelectMultipleContentRequest(function: (MutableList<Uri>?) -> Unit): ActivityResultLauncher<String> {
return this.registerForActivityResult(ActivityResultContracts.GetMultipleContents()) {
function(it)
}
}
然后在你的片段中像这样
//your actual fragment logic
class YourFragment : Fragment() {
//we can assign our request in init process
private val mRequestSelectFiles = buildSelectMultipleContentRequest {
onFilesSelected(it)
}
fun onSelectFiles() {
val mime = "*/*"
mRequestSelectFiles.launch(mime)
}
fun onFilesSelected(list: MutableList<Uri>?) {
//your logic
}
}