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
一个简单的例子:registerForActivityResult和requestmultiplepermission from Activity和Fragment
请求活动以获得活动的结果
registerForActivityResult(
ActivityResultContracts.StartActivityForResult()
) { activityResult ->
if (activityResult.resultCode == Activity.RESULT_OK) {
//...
}
}
检查ActivityResult
向活动请求许可?
registerForActivityResult(
ActivityResultContracts.RequestMultiplePermissions()
) {
//it: Map<String, Boolean>
}
从片段?
使用相同的方法,但确保将这些实现放在初始化中,onAttach()或onCreate()
其他回答
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!:)
如果您正在使用SMS同意API,则使用以下代码(Kotlin):
resultLauncher.launch( consentIntent
)
var resultLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
if (result.resultCode == Activity.RESULT_OK) {
// There are no request codes
// val data: Intent? = result.data
val message = result.data?.getStringExtra(SmsRetriever.EXTRA_SMS_MESSAGE)
getOtpFromMessage(message)
}
}
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);
onActivityResult, startActivityForResult, requestPermissions和onRequestPermissionsResult从1.3.0-alpha04开始在androidx.fragment上被弃用,android.app.Activity上没有。 相反,你可以使用registerForActivityResult的活动结果api。
dor506回答为我工作,因为我在我的大多数项目中使用BaseActivity,所以对我来说更容易在单个文件中更改代码,而不是我所有的活动。我已经写了这个代码的java版本。
BaseActivity代码:
private int requestCode = -1;
private ActivityResultLauncher<Intent> resultHandler = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = this;
registerForActivityResult();
}
private final void registerForActivityResult() {
if (shouldRegisterForActivityResult()) {
this.resultHandler = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(),
new ActivityResultCallback() {
public void onActivityResult(Object var1) {
this.onActivityResult((ActivityResult)var1);
}
public final void onActivityResult(ActivityResult result) {
Intrinsics.checkNotNullExpressionValue(result, "result");
AppActivityClass.onActivityResult(result.getData(), AppActivityClass.this.requestCode, result.getResultCode());
AppActivityClass.this.requestCode = -1;
}
});
}
}
public final void startActivityForResult(int requestCode, Intent intent) {
this.requestCode = requestCode;
if (resultHandler != null) {
resultHandler.launch(intent);
}
}
protected static void onActivityResult(Intent intent, int requestCode, int resultCode) {
}
protected Boolean shouldRegisterForActivityResult() {
return false;
}
现在在任何活动中使用这样的代码:
@Override
protected Boolean shouldRegisterForActivityResult() {
return true; // this will override the baseactivity method and we can use onactivityresult
}
private void someMethod(){
Intent i = new Intent(mContext,SomeOtherClassActivity.class);
startActivityForResult(101,i);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 101) {
if (resultCode == RESULT_OK) {
//revert from called class
}
}
}