我有一个问题，即平板电脑上的FragmentActivity加载Fragment view，但除非与之互动，否则不会显示该问题。所以视图是通过onActivityResult()函数中的主要活动加载的，Fragment中的所有代码都加载正常，因为我可以看到log cat记录了所有信息。但由于某些原因，Fragment不可见，但如果我按下有按钮的区域，即后退按钮，Fragment会出现然后消失（如果后退按钮被调用，则这应该）。事件更奇怪的是，如果我从onActivityResult()中取出片段并在按下按钮中调用它，它工作正常，所以我知道它不是片段中的xml问题或java问题。我认为是onActivityResult()函数，但我无法弄清楚的事实是，当我开始开发这个应用程序时，我按照我的方式实现它，它运行正常。
该函数的代码低于此函数中导致问题的片段，应用程序中的所有其他片段都正常工作。另一件事是应用程序（包括此功能中的片段）在手机上工作正常，这也向我表明它是一个平板电脑问题（也在两个不同的平板电脑上测试，三星Galaxy标签运行2.2.3和nexus 7运行4.3），所以如果有人可以帮助我，我会非常感激：
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
System.out.println("ACTIVITY RESULT");
System.out.println("REQUEST CODE >>>>> " + requestCode);
if (requestCode == webview) {
if (resultCode == RESULT_OK) {
System.out.println("RESULT WEBVIEW");
System.out.println(data.getStringExtra("URL"));
Bundle args = new Bundle();
args.putString("URL", data.getStringExtra("URL"));
args.putString("List Name", currentList);
args.putInt("List Position", pos);
Fragment newFrag = new URLFragment();
// newFrag.setArguments(args);
FragmentTransaction transaction = MainActivity.this
.getSupportFragmentManager().beginTransaction();
transaction.setCustomAnimations(R.anim.in_from_right,
R.anim.out_from_left);
System.out.println("FRAG CONTAINER >>>> "
+ findViewById(R.id.fragment_container));
System.out.println("ARTICLE FRAG >>>> "
+ findViewById(R.id.article_fragment));
if (MainActivity.this.findViewById(R.id.fragment_container) != null) {
transaction.add(R.id.fragment_container, newFrag,
"URL Fragment");
transaction.addToBackStack(null);
} else {
System.out.println("IS THIS TABLET?");
transaction.add(R.id.article_fragment, newFrag,
"URL Fragment");
}
transaction.commit();
}
if (resultCode == RESULT_CANCELED) {
// Write your code if there's no result
System.out.println("CANCELED WEBVIEW");
}
} else if (requestCode == camera) {
if (resultCode == RESULT_OK) {
System.out.println("RESULT CAMERA");
System.out.println(data.getData());
if (data.getData().toString().contains("picasa")) {
System.out.println("UNABLE TO LOAD IMAGE");
Toast.makeText(
getApplicationContext(),
"We are unable to load this image, please select a different one",
Toast.LENGTH_LONG).show();
} else {
if (getSupportFragmentManager().findFragmentByTag(
"Image Fragment") == null) {
GatherGalleryImages gatherImage = new GatherGalleryImages();
Uri selectedImageUri = data.getData();
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(selectedImageUri,
projection, null, null, null);
String selectedImagePath = gatherImage.getPath(cursor);
System.out.println(selectedImagePath);
Bundle args = new Bundle();
args.putString("List Name", currentList);
args.putInt("List Position", pos);
args.putString("Image Location", selectedImagePath);
CameraItemFragment newFragment = new CameraItemFragment();
newFragment.setArguments(args);
FragmentTransaction transaction = getSupportFragmentManager()
.beginTransaction();
transaction.setCustomAnimations(R.anim.in_from_right,
R.anim.out_from_left);
if (findViewById(R.id.fragment_container) != null) {
transaction.add(R.id.fragment_container,
newFragment, "Image Fragment");
transaction.addToBackStack(null);
transaction.commit();
} else {
transaction.add(R.id.article_fragment, newFragment,
"Image Fragment");
// transaction.addToBackStack(null);
transaction.commit();
}
}
}
}
if (resultCode == RESULT_CANCELED) {
// Write your code if there's no result
System.out.println("CANCELED CAMERA");
}
} else if (requestCode == IntentIntegrator.REQUEST_CODE) {
if (resultCode != RESULT_CANCELED) {
IntentResult scanResult = IntentIntegrator.parseActivityResult(
requestCode, resultCode, data);
if (scanResult != null) {
String upc = scanResult.getContents();
// put whatever you want to do with the code here
System.out.println("UPC >>>> " + upc);
Intent mainIntent = new Intent(MainActivity.this,
Webview_Activity.class);
mainIntent.putExtra("upc", upc);
mainIntent.putExtra("listName", currentList);
MainActivity.this.startActivityForResult(mainIntent, 1);
}
}
} else if (requestCode == cam) {
System.out.println("CAMERA INTENT 0");
if (resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
// CALL THIS METHOD TO GET THE URI FROM THE BITMAP
Uri tempUri = getImageUri(getApplicationContext(), photo);
// CALL THIS METHOD TO GET THE ACTUAL PATH
File finalFile = new File(getRealPathFromURI(tempUri));
String selectedImagePath = finalFile.getAbsolutePath();
Bundle args = new Bundle();
args.putString("List Name", currentList);
args.putInt("List Position", pos);
args.putString("Image Location", selectedImagePath);
CameraItemFragment newFragment = new CameraItemFragment();
newFragment.setArguments(args);
FragmentTransaction transaction = getSupportFragmentManager()
.beginTransaction();
transaction.setCustomAnimations(R.anim.in_from_right,
R.anim.out_from_left);
if (findViewById(R.id.fragment_container) != null) {
transaction.add(R.id.fragment_container, newFragment,
"Image Fragment");
transaction.addToBackStack(null);
transaction.commit();
} else {
transaction.add(R.id.article_fragment, newFragment,
"Image Fragment");
// transaction.addToBackStack(null);
transaction.commit();
}
}
if (resultCode == RESULT_CANCELED) {
// Write your code if there's no result
}
} else if (resultCode == RESULT_CANCELED) {
}
}
// EDIT
好的，所以我做了一点发现，片段加载得很好，但是我发现它正在主片段后面加载（xml中设置的片段，如下所示），但只有从{{1功能。该函数指向onActivityResult()，但如果我将其指向headlines_fragment_two，则片段会在前面加载。现在我已经从headlines_fragment更改了headlines_fragment_two的名称，看看是否会产生任何影响（遗憾的是它没有）。因此，如果有人有任何想法为什么会这样，请帮助。平板电脑上片段布局的xml代码如下：
activity_fragment答案 0 :(得分：0)
解决了这个问题，在我的一个片段中，我有一个调用listFragment的onResume()函数，由于某些原因导致我出现问题