请注意,此问题与以下问题不重复:
- https://stackoverflow.com/questions/19006776/onactivityresult-not-working-with-fragments https://stackoverflow.com/questions/19006776/onactivityresult-not-working-with-fragments
- onActivityResult 不适用于片段 https://stackoverflow.com/questions/19005193/onactivityresult-not-working-on-fragments
另外,还有一个类似的问题 https://stackoverflow.com/questions/17270594/activity-result-no-fragment-exists-for-index-after-facebook-publish之前被问过,但没有提到方向变化(并且尚未解决)。
My onActivityResult
方法中的Fragment
如果我不改变方向,就会被叫到。但是,如果我按照以下步骤操作,则不会调用它:
- 在 FragmentActivity 中加载片段。
- 从片段来看:
startActivityForResult(new Intent(MediaStore.ACTION_IMAGE_CAPTURE), Constants.REQ_CODE_IMAGE_CAPTURE);
- 等待相机加载。
- 切换方向。
- 拍照并单击复选标记。
onActivityResult
仍然在父 FragmentActivity 中被调用。但是,由于此警告,我收到:
W/FragmentActivity(4418): Activity result no fragment exists for index: 0x22d73
...我的猜测是,由于方向变化,父级被破坏,并且在重新创建后,找不到Fragment
那个叫startActivityForResult
首先。
这是一个框架错误吗?如何解决这个问题?
EDIT:由于大众的需求添加了更多代码。
FragmentActivity.java:
...
fragment = new ExampleFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace (R.id.mainContentView, fragment);
if (clearBackStack) {
// clear the back stack
while (getSupportFragmentManager().popBackStackImmediate ());
// add the current transaction to the back stack
transaction.addToBackStack (null);
}
else {
transaction.addToBackStack(null);
}
transaction.commit();
...
@Override
public void onActivityResult(int reqCode, int resultCode, Intent data) {
super.onActivityResult(reqCode, resultCode, data);
}
示例Fragment.java:
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePicture, Constants.REQ_CODE_IMAGE_CAPTURE);
...
@Override
public void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch (requestCode) {
case Constants.REQ_CODE_IMAGE_CAPTURE:
// handle added image
}
}