MyFragment.java
public class MyFragment extends Fragment {
private onItemSelectedListener listener;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment, container,
false);
btn_myButton = (Button) view.findViewById(R.id.btn_new_client);
btn_myButton .setOnClickListener(new OnClickListener() {
public void onClick(View v) {
updateDetail("New Layout");
}
});
return view;
}
Button btn_myButton;
public interface onItemSelectedListener {
public void onItemSelected(String link);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (activity instanceof onItemSelectedListener) {
listener = (onItemSelectedListener) activity;
} else {
throw new ClassCastException(activity.toString()
+ " must implemenet OnItemSelectedListener");
}
}
public void updateDetail(String s) {
listener.onItemSelected(s);
}
}
MainActivity.java
public class MainActivity extends Activity implements
onItemSelectedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
setContentView(R.layout.main_activity);
super.onCreate(savedInstanceState);
}
public void onItemSelected(String link) {
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
Fragment fragment;
if ("New Layout".equals(link)) {
fragment = new Fragment1();
transaction.replace(R.id.detailFragment, fragment);
transaction.commit();
}
}
}
Fragment1.java
public class Fragment1 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.newfragmentt, container,
false);
return v;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
}
fragment.xml之
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btn_new_client"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:ems="8"
android:gravity="center|center_vertical"
android:padding="2dp"
android:text="@string/new_client"
android:textColor="#FFFFFF" >
</Button>
</LinearLayout>
main_activity.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#4B6C9E"
android:baselineAligned="false"
android:orientation="horizontal" >
<fragment
android:id="@+id/FragmentId"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
class="com.examples.MyProject.MyFragment" >
</fragment>
<FrameLayout
android:id="@+id/detailFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2" >
</FrameLayout>
</LinearLayout>
LogCat错误：
FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.elintsys.iCaseDiary/com.examples.MyProject.MainActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
at android.app.Activity.setContentView(Activity.java:1862)
at com.examples.MyProject.MainActivity.onCreate(CaseEntryActivity.java:15)
at android.app.Activity.performCreate(Activity.java:4492)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
... 11 more
Caused by: java.lang.IllegalStateException: Fragment com.elintsys.iCaseDiary.CaseEntryFragment did not create a view.
at android.app.Activity.onCreateView(Activity.java:4293)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:673)
... 21 more
Sending signal. PID: 16275 SIG: 9
请帮帮我朋友。
答案 0 :(得分：17)
你需要扭转这一点：
setContentView(R.layout.main_activity);
super.onCreate(savedInstanceState).
进入这个：
super.onCreate(savedInstanceState).
setContentView(R.layout.main_activity);
在您的活动中onCreate。
答案 1 :(得分：2)
我也遇到了这个错误，即使我在super.onCreate之后调用了setContentView。在我的例子中，我在我的超类'onCreate方法中设置了一个工作片段，该方法在setContentView之前被调用并触发了此处记录的错误：
https://code.google.com/p/android/issues/detail?id=22564
我不得不将工作片段的初始化移动到稍后在活动生命周期中调用的单独方法中来解决此问题。
根据请求，这是代码的样子：
public class BaseActivity extends ActionBarActivity {
private static final String TAG_TASK_FRAGMENT = "task_fragment";
protected TaskFragment taskFragment; // Used to hold a reference to the active activity between config changes
protected void setupTaskFragment() {
// It would be great if we could just do this in onCreate, but setting up the task fragment
// before calling setContentView() triggers the bug described here:
//
// https://code.google.com/p/android/issues/detail?id=22564
//
// So we just need to make sure Activities that run async tasks call this setup function
// before they do.
FragmentManager fm = getSupportFragmentManager();
taskFragment = (TaskFragment) fm.findFragmentByTag(TAG_TASK_FRAGMENT);
// If the Fragment is non-null, then it is currently being
// retained across a configuration change.
if (taskFragment == null) {
taskFragment = new TaskFragment();
fm.beginTransaction().add(taskFragment, TAG_TASK_FRAGMENT).commit();
fm.executePendingTransactions();
}
}
}
public class ChildActivity extends BaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); // If this call adds a fragment, you will have problems
setContentView(R.layout.activity_child);
setupTaskFragment(); // So we have to add our task fragment here, after we've called setContentView()
// further initialization here
}
}
/**
*
* TaskFragment
*
* We use this fragment to manage async tasks between configuration changes. The fragment calls
* setRetainInstance(true) in its constructor, which makes it so that it will not be recreated
* between configuration events (like screen rotation). Async tasks running from the fragment
* can then be kept up to date on which activity they belong to.
*/
public class TaskFragment extends Fragment {
private ArrayList<AsyncTask> asyncTasks = new ArrayList<AsyncTask>();
public TaskFragment() {
super();
setRetainInstance(true);
}
public void addTask(AsyncTask task) {
asyncTasks.add(task);
}
public void removeTask(AsyncTask task) {
asyncTasks.remove(task);
}
public Application getApplication() {
Activity activity = getActivity();
if (activity != null)
return activity.getApplication();
else
return null;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
for (AsyncTask task : asyncTasks) {
task.onAttach(activity);
}
}
@Override
public void onDetach() {
super.onDetach();
for (AsyncTask task : asyncTasks) {
task.onDetach();
}
}
}
答案 2 :(得分：1)
除了Mel Stanley所说的，你还需要确保将android：标签添加到加载片段的xml活动中：
<fragment
android:id="@+id/fragment_container"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:name="com.your_app.name.fragments.NameOfFragment"
android:tag="fragment_tag"
tools:layout="@layout/layout_fragment"
/>
这确保了在第一次使用xml加载片段时，不会使用Mel的代码重新加载。如果你把它遗漏了，你将在第一次运行时有2个片段加载 - 如果你有完成后改变布局的异步请求，这就是一个问题。
答案 3 :(得分：0)
我遇到了同样的问题，但是已经有@Override
public void onClick(View v) {
if (v == Save) {
boolean isInserted = myDb.insertData(e_Txn.getText().toString(),
e_Name.getText().toString(),
e_Amount.getText().toString(),
Display_date.getText().toString().trim(),
e_Description.getText().toString(),
Description.getSelectedItem().toString());
if (isInserted == true) {
Toast.makeText(Donation.this, "Data Inserted", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(Donation.this, "Data not Inserted", Toast.LENGTH_LONG).show();
}
}
else if {v == New) {
e_Name.getText().clear();
e_Amount.getText().clear();
e_Txn.getText().clear();
e_Description.getText().clear();
}
}
和setContentView。在我的片段活动中添加以下内容解决了该问题：
super.onCreate进一步进入我的项目后，这个问题仍然存在，第二个解决方案正在取代：
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
使用：
<fragment
android:id="@+id/output"
class=".Fragment_1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
显然，“您不能替换静态放置在xml布局文件中的片段”，此问题的答案是：Android - fragment .replace() doesn't replace content - puts it on top