好的，所以这就是事情，我看了很多视频并阅读了大量的文章，但我找不到解决方案......
基本上，我的应用程序崩溃了，因为我正在膨胀，我无法找到解决方案。
JAVA：
package com.iweto;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.InflateException;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
public class TestScreen extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
MyFragment frag = new MyFragment();
transaction.add(R.id.fragment_container, frag);
transaction.commit();
setContentView(R.layout.test_screen);
}
@Override
protected void onStart() {
super.onStart();
}
public static class MyFragment extends Fragment {
private View view;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (view != null) {
ViewGroup parent = (ViewGroup) view.getParent();
if (parent != null)
parent.removeView(view);
}
try {
return inflater.inflate(R.layout.main, container, false);
} catch (InflateException e) {
/* map is already there, just return view as it is */
e.getStackTrace();
}
return view;
}
}
}
XMLS：
test_screen.xml：
<?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"
>
<LinearLayout
android:orientation="vertical"
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</LinearLayout>
</LinearLayout>
最后是main.xml文件：
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/main" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="350sp"
android:height="350sp"
android:layout_gravity="center"
android:text="testestestest"
></Button>
</LinearLayout>
</fragment>
更多的是，这是logcat：
02-15 09:45:59.566: D/AndroidRuntime(1086): Shutting down VM
02-15 09:45:59.566: W/dalvikvm(1086): threadid=1: thread exiting with uncaught exception (group=0xa628d288)
02-15 09:45:59.570: E/AndroidRuntime(1086): FATAL EXCEPTION: main
02-15 09:45:59.570: E/AndroidRuntime(1086): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.iweto/com.iweto.TestScreen}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.ActivityThread.access$600(ActivityThread.java:130)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.os.Handler.dispatchMessage(Handler.java:99)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.os.Looper.loop(Looper.java:137)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.ActivityThread.main(ActivityThread.java:4745)
02-15 09:45:59.570: E/AndroidRuntime(1086): at java.lang.reflect.Method.invokeNative(Native Method)
02-15 09:45:59.570: E/AndroidRuntime(1086): at java.lang.reflect.Method.invoke(Method.java:511)
02-15 09:45:59.570: E/AndroidRuntime(1086): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
02-15 09:45:59.570: E/AndroidRuntime(1086): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-15 09:45:59.570: E/AndroidRuntime(1086): at dalvik.system.NativeStart.main(Native Method)
02-15 09:45:59.570: E/AndroidRuntime(1086): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
02-15 09:45:59.570: E/AndroidRuntime(1086): at com.iweto.TestScreen$MyFragment.onCreateView(TestScreen.java:44)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:829)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.BackStackRecord.run(BackStackRecord.java:635)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1397)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.Activity.performStart(Activity.java:5017)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2032)
02-15 09:45:59.570: E/AndroidRuntime(1086): ... 11 more
02-15 09:45:59.570: E/AndroidRuntime(1086): Caused by: java.lang.NullPointerException: name == null
02-15 09:45:59.570: E/AndroidRuntime(1086): at java.lang.VMClassLoader.findLoadedClass(Native Method)
02-15 09:45:59.570: E/AndroidRuntime(1086): at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:354)
02-15 09:45:59.570: E/AndroidRuntime(1086): at java.lang.ClassLoader.loadClass(ClassLoader.java:491)
02-15 09:45:59.570: E/AndroidRuntime(1086): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.support.v4.app.Fragment.isSupportFragmentClass(Fragment.java:436)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:255)
02-15 09:45:59.570: E/AndroidRuntime(1086): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
02-15 09:45:59.570: E/AndroidRuntime(1086): ... 20 more
答案 0 :(得分：2)
在setContentView：
的setContentView（R.layout.test_screen）;
setContentView初始化您的test_screen，之后您才能访问其内容fragment container
答案 1 :(得分：0)
移动setContentView(R.layout.test_screen);
在行super.onCreate(savedInstanceState);