应用程序启动时，我在 XML 文件中收到“错误膨胀类片段”错误。我不明白为什么？
我尝试用类似的文件替换导致错误的类文件，该文件用于另一个没有出现此错误的项目，但我没有帮助，所以也许问题不在类文件中，而是在某个地方别的？
错误：
01-09 23:16:52.054: E/AndroidRuntime(558): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.exempelfragmentsgrund/com.example.exempelfragmentsgrund.MainActivity}: android.view.InflateException: Binary XML file line #15: Error inflating class fragment
Line XML-文件第 15 行：
<fragment android:name="com.example.exempelfragmentgrund.VisaFragment"
android:id="@+id/fragment_container_stor"
android:layout_weight="3"
android:layout_width="0dp"
android:layout_height="match_parent" />
VisaFragment.java onCreateView：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState){
if (savedInstanceState != null){
mCurrentPosition = savedInstanceState.getInt(ARG_POSITION);
}
return inflater.inflate(R.layout.om_sida, container, false);
}
以下是整个文件：
错误日志：
01-09 23:39:24.804: D/dalvikvm(595): GC_FOR_ALLOC freed 46K, 3% free 8843K/9027K, paused 38ms
01-09 23:39:24.815: I/dalvikvm-heap(595): Grow heap (frag case) to 9.232MB for 513744-byte allocation
01-09 23:39:24.884: D/dalvikvm(595): GC_FOR_ALLOC freed <1K, 3% free 9344K/9543K, paused 43ms
01-09 23:39:24.974: D/dalvikvm(595): GC_CONCURRENT freed <1K, 3% free 9344K/9543K, paused 3ms+3ms
01-09 23:39:25.014: D/AndroidRuntime(595): Shutting down VM
01-09 23:39:25.014: W/dalvikvm(595): threadid=1: thread exiting with uncaught exception (group=0x40014760)
01-09 23:39:25.034: E/AndroidRuntime(595): FATAL EXCEPTION: main
01-09 23:39:25.034: E/AndroidRuntime(595): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.exempelfragmentsgrund/com.example.exempelfragmentsgrund.MainActivity}: android.view.InflateException: Binary XML file line #15: Error inflating class fragment
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1748)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1764)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.ActivityThread.access$1500(ActivityThread.java:122)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1002)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.os.Handler.dispatchMessage(Handler.java:99)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.os.Looper.loop(Looper.java:132)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.ActivityThread.main(ActivityThread.java:4025)
01-09 23:39:25.034: E/AndroidRuntime(595): at java.lang.reflect.Method.invokeNative(Native Method)
01-09 23:39:25.034: E/AndroidRuntime(595): at java.lang.reflect.Method.invoke(Method.java:491)
01-09 23:39:25.034: E/AndroidRuntime(595): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
01-09 23:39:25.034: E/AndroidRuntime(595): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
01-09 23:39:25.034: E/AndroidRuntime(595): at dalvik.system.NativeStart.main(Native Method)
01-09 23:39:25.034: E/AndroidRuntime(595): Caused by: android.view.InflateException: Binary XML file line #15: Error inflating class fragment
01-09 23:39:25.034: E/AndroidRuntime(595): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:688)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.view.LayoutInflater.rInflate(LayoutInflater.java:724)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.view.LayoutInflater.inflate(LayoutInflater.java:391)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.view.LayoutInflater.inflate(LayoutInflater.java:347)
01-09 23:39:25.034: E/AndroidRuntime(595): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:223)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.Activity.setContentView(Activity.java:1780)
01-09 23:39:25.034: E/AndroidRuntime(595): at com.example.exempelfragmentsgrund.MainActivity.onCreate(MainActivity.java:13)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1712)
01-09 23:39:25.034: E/AndroidRuntime(595): ... 11 more
01-09 23:39:25.034: E/AndroidRuntime(595): Caused by: android.app.Fragment$InstantiationException: Unable to instantiate fragment com.example.exempelfragmentgrund.VisaFragment: make sure class name exists, is public, and has an empty constructor that is public
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.Fragment.instantiate(Fragment.java:500)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.Fragment.instantiate(Fragment.java:468)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.Activity.onCreateView(Activity.java:4132)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:664)
01-09 23:39:25.034: E/AndroidRuntime(595): ... 20 more
01-09 23:39:25.034: E/AndroidRuntime(595): Caused by: java.lang.ClassNotFoundException: com.example.exempelfragmentgrund.VisaFragment in loader dalvik.system.PathClassLoader[/data/app/com.example.exempelfragmentsgrund-1.apk]
01-09 23:39:25.034: E/AndroidRuntime(595): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:251)
01-09 23:39:25.034: E/AndroidRuntime(595): at java.lang.ClassLoader.loadClass(ClassLoader.java:540)
01-09 23:39:25.034: E/AndroidRuntime(595): at java.lang.ClassLoader.loadClass(ClassLoader.java:500)
01-09 23:39:25.034: E/AndroidRuntime(595): at android.app.Fragment.instantiate(Fragment.java:490)
01-09 23:39:25.034: E/AndroidRuntime(595): ... 23 more
（布局大/）activity_main.XML：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:baselineAligned="false"
android:orientation="horizontal"
android:background="@color/menyBGColor"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment android:name="com.example.exempelfragmentsgrund.MenyFragment"
android:id="@+id/meny_fragment"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="match_parent" />
<fragment android:name="com.example.exempelfragmentgrund.VisaFragment"
android:id="@+id/fragment_container_stor"
android:layout_weight="3"
android:layout_width="0dp"
android:layout_height="match_parent" />
</LinearLayout>
VisaFragment.java：
package com.example.exempelfragmentsgrund;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class VisaFragment extends Fragment {
static final String ARG_POSITION = "position";
int mCurrentPosition = -1;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState){
if (savedInstanceState != null){
mCurrentPosition = savedInstanceState.getInt(ARG_POSITION);
}
return inflater.inflate(R.layout.om_sida, container, false);
}
@Override
public void onStart(){
super.onStart();
System.out.println("VisaFragment onStart");
Bundle argument = getArguments();
if (argument != null){
visaFragmentArgument(argument.getInt(ARG_POSITION));
}else if (mCurrentPosition != -1){
visaFragmentArgument(mCurrentPosition);
}
}
public void visaFragmentArgument(int position) {
System.out.println("VisaFragment VisaFragmentArgument");
TextView infoText = (TextView) getActivity().findViewById(R.id.fragmentTextView);
infoText.setText(getResources().getStringArray(R.array.adressLista)[position]);
//ArrayLista.infoText[position]);
TextView infoTitel = (TextView) getActivity().findViewById(R.id.fragmentTextViewTitel);
infoTitel.setText(getResources().getStringArray(R.array.infoTextTitel)[position]);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(ARG_POSITION, mCurrentPosition);
}
}
om_sida.XML：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="@dimen/infoTextPadding"
android:background="@color/visaSidaBGColor" >
<TextView
android:id="@+id/fragmentTextViewTitel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="left"
android:layout_marginTop="16dp"
android:textSize="36sp" />
<TextView
android:id="@+id/fragmentTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/fragmentTextViewTitel"
android:layout_marginTop="20dp"
android:textSize="18sp" />
</RelativeLayout>
MainActivity.java
package com.example.exempelfragmentsgrund;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
public class MainActivity extends FragmentActivity implements MenyFragment.onMenyKnappClickListener{
@Override
public void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (findViewById(R.id.fragment_container_liten) != null){
if (savedInstanceState != null){
return;
}
MenyFragment menyFragment = new MenyFragment();
menyFragment.setArguments(getIntent().getExtras());
getSupportFragmentManager().beginTransaction()
.add(R.id.fragment_container, menyFragment).commit();
}
}
public void onMenyKnappVald (int position){
VisaFragment visaFrag = (VisaFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_container_stor);
if (visaFrag != null) {
visaFrag.visaFragmentArgument(position);
}else{
VisaFragment nyttFragment = new VisaFragment();
Bundle argument = new Bundle ();
argument.putInt(VisaFragment.ARG_POSITION, position);
nyttFragment.setArguments(argument);
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container, nyttFragment);
transaction.addToBackStack(null);
transaction.commit();
}
}
}