在新的嵌套片段API中未调用onActivityResult()
在新的嵌套片段API中未调用onActivityResult()
提问于 2012-11-27 16:28:26
我一直在使用Android在支持库中包含的新的nested fragment API。
我在处理嵌套片段时遇到的问题是，如果一个嵌套片段(即通过getChildFragmentManager()返回的FragmentManager添加到另一个片段中的片段)调用startActivityForResult()，则不会调用该嵌套片段的onActivityResult()方法。但是，父片段的onActivityResult()和活动的onActivityResult()都会被调用。
我不知道我是否遗漏了嵌套片段的某些内容，但我没有预料到所描述的行为。下面是重现这个问题的代码。如果有人能给我指出正确的方向，并向我解释我做错了什么，我将不胜感激：
package com.example.nestedfragmentactivityresult;
import android.media.RingtoneManager;
import android.os.Bundle;
import android.content.Intent;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends FragmentActivity
{
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
this.getSupportFragmentManager()
.beginTransaction()
.add(android.R.id.content, new ContainerFragment())
.commit();
}
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
// This is called
Toast.makeText(getApplication(),
"Consumed by activity",
Toast.LENGTH_SHORT).show();
}
public static class ContainerFragment extends Fragment
{
public final View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState)
{
View result = inflater.inflate(R.layout.test_nested_fragment_container,
container,
false);
return result;
}
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
getChildFragmentManager().beginTransaction()
.add(R.id.content, new NestedFragment())
.commit();
}
public void onActivityResult(int requestCode,
int resultCode,
Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
// This is called
Toast.makeText(getActivity(),
"Consumed by parent fragment",
Toast.LENGTH_SHORT).show();
}
}
public static class NestedFragment extends Fragment
{
public final View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState)
{
Button button = new Button(getActivity());
button.setText("Click me!");
button.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
startActivityForResult(intent, 0);
}
});
return button;
}
public void onActivityResult(int requestCode,
int resultCode,
Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
// This is NOT called
Toast.makeText(getActivity(),
"Consumed by nested fragment",
Toast.LENGTH_SHORT).show();
}
}
}test_nested_fragment_container.xml是：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>回答 4
Stack Overflow用户
发布于 2013-12-12 20:13:33
我用下面的代码解决了这个问题(使用了支持库)：
在容器片段中，以这种方式覆盖onActivityResult：
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
List<Fragment> fragments = getChildFragmentManager().getFragments();
if (fragments != null) {
for (Fragment fragment : fragments) {
fragment.onActivityResult(requestCode, resultCode, data);
}
}
}现在，嵌套片段将接收对onActivityResult方法的调用。
同样，正如noted Eric Brynsvold在类似的问题中所说的，嵌套片段应该使用其父片段而不是简单的startActivityForResult()调用来启动活动。因此，在嵌套片段中，活动的开头为：
getParentFragment().startActivityForResult(intent, requestCode);Stack Overflow用户
发布于 2013-11-16 08:32:53
下面是我如何解决这个问题的。
在活动中：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
List<Fragment> frags = getSupportFragmentManager().getFragments();
if (frags != null) {
for (Fragment f : frags) {
if (f != null)
handleResult(f, requestCode, resultCode, data);
}
}
}
private void handleResult(Fragment frag, int requestCode, int resultCode, Intent data) {
if (frag instanceof IHandleActivityResult) { // custom interface with no signitures
frag.onActivityResult(requestCode, resultCode, data);
}
List<Fragment> frags = frag.getChildFragmentManager().getFragments();
if (frags != null) {
for (Fragment f : frags) {
if (f != null)
handleResult(f, requestCode, resultCode, data);
}
}
}Stack Overflow用户
发布于 2016-06-02 18:06:08
对于主活动，可以使用超类编写OnActivityForResult，如下所示
@Override
public void onActivityResult(int requestCode, int resultCode, Intent result) {
super.onActivityResult(requestCode, resultCode, result);
if (requestCode == Crop.REQUEST_PICK && resultCode == RESULT_OK) {
beginCrop(result.getData());
} }对于不带getActivity()的活动写意图，如
Intent pickContactIntent = new Intent(Intent.ACTION_PICK, Uri.parse("content://contacts"));
pickContactIntent.setType(ContactsContract.CommonDataKinds.Phone.CONTENT_TYPE); // Show user only contacts w/ phone numbers
startActivityForResult(pickContactIntent, 103);片段的OnActivityResult
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 101 && resultCode == getActivity().RESULT_OK && null != data) {}}
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原文链接：
https://stackoverflow.com/questions/13580075
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