当相机活动返回时，承载这个片段的活动有它的onActivityResult被调用。
我的片段开始一个活动的结果与意图发送给相机拍照。图片应用程序加载正常，拍摄照片并返回。然而onActivityResult从未被击中。我设置了断点，但什么都没有触发。一个片段可以有onActivityResult吗?我想是的，因为它是一个已提供的函数。为什么这个没有被触发?
ImageView myImage = (ImageView)inflatedView.findViewById(R.id.image);
myImage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, 1888);
}
});
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if( requestCode == 1888 ) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
((ImageView)inflatedView.findViewById(R.id.image)).setImageBitmap(photo);
}
}
我在使用ChildFragmentManager时有同样的问题。管理器不会将结果传递给嵌套片段，您必须在基本片段中手动执行此操作。
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
Fragment fragment = (Fragment) getChildFragmentManager().findFragmentByTag(childTag);
if (fragment != null) {
fragment.onActivityResult(requestCode, resultCode, intent);
}
}
如果你不知道活动中的片段，只需要枚举它们并发送活动结果参数:
/ / Java
// In your activity
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
for (Fragment fragment : getSupportFragmentManager().getFragments()) {
fragment.onActivityResult(requestCode, resultCode, data);
}
}
科特林
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
for (fragment in supportFragmentManager.fragments) {
fragment.onActivityResult(requestCode, resultCode, data)
}
}
原来的帖子。
FragmentActivity用修改过的requestCode替换requestCode。之后，当onActivityResult()将被调用时，FragmentActivity将解析较高的16位并恢复原始Fragment的索引。看看这个方案:
如果在根级别上有一些片段，就没有问题。但是如果你有嵌套的片段，比如在ViewPager里面有几个标签的片段，你肯定会遇到问题(或者已经遇到了)。
因为只有一个索引存储在requestCode中。这是Fragment在FragmentManager中的索引。当我们使用嵌套片段时，会有子片段管理器，它们有自己的片段列表。因此，有必要保存从根FragmentManager开始的整个索引链。
我们如何解决这个问题?在这篇文章中有一个常见的变通方案。
GitHub: https://github.com/shamanland/nested-fragment-issue
You can simply override BaseActivity onActivityResult on fragment baseActivity.startActivityForResult .
On BaseActivity add interface and override onActivityResult.
private OnBaseActivityResult baseActivityResult;
public static final int BASE_RESULT_RCODE = 111;
public interface OnBaseActivityResult{
void onBaseActivityResult(int requestCode, int resultCode, Intent data);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(getBaseActivityResult() !=null && requestCode == BASE_RESULT_RCODE){
getBaseActivityResult().onBaseActivityResult(requestCode, resultCode, data);
setBaseActivityResult(null);
}
On Fragment implements OnBaseActivityResult
@Override
public void onBaseActivityResult(int requestCode, int resultCode, Intent data) {
Log.d("RQ","OnBaseActivityResult");
if (data != null) {
Log.d("RQ","OnBaseActivityResult + Data");
Bundle arguments = data.getExtras();
}
}
这个变通方法会奏效。
Kotlin版本(在你的活动onActivityResult()中)
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
//add following lines in your activity
if(supportFragmentManager?.fragments!=null && supportFragmentManager?.fragments!!.size>0)
for (i in 0..supportFragmentManager?.fragments!!.size-1) {
val fragment= supportFragmentManager?.fragments!!.get(i)
fragment.onActivityResult(requestCode, resultCode, data)
}
}
