我知道这里有很多关于这个话题的内容，但我似乎并没有找到问题的根源。问题是我在MainActivity中有一个Fragment，当我按下操作栏溢出中的设置按钮时，我想用其他片段替换它。这很好用，但是如果我再次按下设置按钮，或者再次尝试再次尝试，我的应用程序将崩溃（不幸的是MyApp已停止）所以我想知道是什么问题。非常感谢，如果你可以帮助我，或者你只是花时间阅读它，我是Android编程的新手，我想了解很多。
09-27 17:53:16.364: W/System.err(15060): android.view.InflateException: Binary XML file line #9: Error inflating class fragment
09-27 17:53:16.364: W/System.err(15060): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:719)
09-27 17:53:16.364: W/System.err(15060): at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
09-27 17:53:16.364: W/System.err(15060): at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
09-27 17:53:16.364: W/System.err(15060): at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
09-27 17:53:16.364: W/System.err(15060): at com.example.myfirstapp.FragmentOpAdv.onCreateView(FragmentOpAdv.java:14)
09-27 17:53:16.364: W/System.err(15060): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1504)
09-27 17:53:16.364: W/System.err(15060): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:942)
09-27 17:53:16.364: W/System.err(15060): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1121)
09-27 17:53:16.364: W/System.err(15060): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
09-27 17:53:16.364: W/System.err(15060): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1484)
09-27 17:53:16.364: W/System.err(15060): at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:450)
09-27 17:53:16.364: W/System.err(15060): at android.os.Handler.handleCallback(Handler.java:733)
09-27 17:53:16.364: W/System.err(15060): at android.os.Handler.dispatchMessage(Handler.java:95)
09-27 17:53:16.364: W/System.err(15060): at android.os.Looper.loop(Looper.java:136)
09-27 17:53:16.364: W/System.err(15060): at android.app.ActivityThread.main(ActivityThread.java:5579)
09-27 17:53:16.364: W/System.err(15060): at java.lang.reflect.Method.invokeNative(Native Method)
09-27 17:53:16.364: W/System.err(15060): at java.lang.reflect.Method.invoke(Method.java:515)
09-27 17:53:16.364: W/System.err(15060): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
09-27 17:53:16.364: W/System.err(15060): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
09-27 17:53:16.364: W/System.err(15060): at dalvik.system.NativeStart.main(Native Method)
09-27 17:53:16.364: W/System.err(15060): Caused by: java.lang.IllegalArgumentException: Binary XML file line #9: Duplicate id 0x7f050041, tag null, or parent id 0x0 with another fragment for com.example.myfirstapp.FragmentA
09-27 17:53:16.364: W/System.err(15060): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:297)
09-27 17:53:16.364: W/System.err(15060): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:691)
09-27 17:53:16.364: W/System.err(15060): ... 19 more
09-27 17:53:16.364: I/System.out(15060): Binary XML file line #9: Error inflating class fragment
09-27 17:53:16.364: E/ViewRootImpl(15060): sendUserActionEvent() mView == null
这是堆栈跟踪，也可以查看我的MainActivity.class
package com.example.myfirstapp;
import android.app.AlertDialog;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
private FragmentOpAdv fragmentOpAdv;
private FragmentA fragmentA;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(findViewById(R.id.mainact)!=null)
{
if (savedInstanceState!=null)
{
return;
}
fragmentA= new FragmentA();
getSupportFragmentManager().beginTransaction().add(R.id.mainact, fragmentA).commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (R.id.action_search==id)
{
openSearch();
return true;
}
if (R.id.action_settings==id)
{
openSettings();
return true;
}
else
{
return super.onOptionsItemSelected(item);
}
}
/**
* Called when the user clicks the Settings item
*/
public void openSettings() {
fragmentOpAdv = new FragmentOpAdv();
getSupportFragmentManager().beginTransaction().replace(R.id.mainact, fragmentOpAdv).addToBackStack(null).setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE).commit();
}
/**
* Called when the user clicks the Search item
*/
public void openSearch() {
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Inserte algo");
alert.setMessage("Oiga en serio");
alert.show();
}
/** Called when the user clicks the Send button */
public void sendMessage(View view)
{
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
}
和我的片段类
package com.example.myfirstapp;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class FragmentOpAdv extends Fragment{
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState)
{
try {
View view = inflater.inflate(R.layout.fragment_op_adv, container, false);
return view;
} catch (Exception e) {
e.printStackTrace();
System.out.println(e.getMessage());
return null;
}
}
}
这是主要活动的xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/mainact"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg"
android:paddingTop="?attr/actionBarSize" >
答案 0 :(得分：1)
我刚刚发现的问题是，当布局包含a时，我无法将布局扩展为片段。只有动态添加到片段时才支持嵌套片段。
答案 1 :(得分：0)
如果所有内容与谷歌代码相同，请在我的情况下检查清单文件，我添加了地理位置密钥和地图密钥，这就是发生异常的原因，
注意 - 请勿在清单文件中添加两个键删除地图密钥
meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="@string/google_maps_key"/>
上面的代码并添加此代码。
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/auto_location"/>
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version"/>