我一直在使用片段标签，我还没弄清楚我的代码有什么问题。因为它没有错误但是当我在模拟器上运行它总是崩溃请帮助我tnx
我的主要活动代码：
public class MainActivity extends SherlockFragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActionBar actionbar = getSupportActionBar();
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionbar.setTitle("Dancing Fountain Master Control");
ActionBar.Tab Frag1Tab = actionbar.newTab().setText("Song List");
ActionBar.Tab Frag2Tab = actionbar.newTab().setText("About Us");
Fragment Fragment1 = new Fragment_1();
Fragment Fragment2 = new Fragment_2();
Frag1Tab.setTabListener(new MyTabListener(Fragment1));
Frag2Tab.setTabListener(new MyTabListener(Fragment2));
actionbar.addTab(Frag1Tab);
actionbar.addTab(Frag2Tab);
}
class MyTabListener implements ActionBar.TabListener {
public Fragment fragment;
public MyTabListener(Fragment fragment){
this.fragment = fragment;
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
ft.replace(R.id.fragment_container, fragment);
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
}
activity_main.xml中
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<FrameLayout
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
Fragment_1
public class Fragment_1 extends SherlockFragment implements OnClickListener {
Button button1;
Button button2;
Button button3;
Button button4;
Button button5;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_1, container, false);
button1 = (Button) v.findViewById(R.id.bttn1);
button1.setOnClickListener(this);
button2 = (Button) v.findViewById(R.id.bttn2);
button2.setOnClickListener(this);
button3 = (Button) v.findViewById(R.id.bttn3);
button3.setOnClickListener(this);
button4 = (Button) v.findViewById(R.id.bttn4);
button4.setOnClickListener(this);
button5 = (Button) v.findViewById(R.id.bttn5);
button5.setOnClickListener(this);
return v;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int id = v.getId();
if(id == R.id.bttn1){
Intent intent = new Intent(v.getContext(), Rock.class);
startActivityForResult(intent, 0);
}
else if(id == R.id.bttn2){
Intent intent = new Intent(v.getContext(), Punk.class);
startActivityForResult(intent, 0);
}
else if(id == R.id.bttn3){
Intent intent = new Intent(v.getContext(), Classical.class);
startActivityForResult(intent, 0);
}
else if(id == R.id.bttn4){
Intent intent = new Intent(v.getContext(), OPM.class);
startActivityForResult(intent, 0);
}
else if(id == R.id.bttn5){
Intent intent = new Intent(v.getContext(), Pop.class);
startActivityForResult(intent, 0);
}
}
}
和我的Logcat
09-30 22:17:45.680: E/AndroidRuntime(934): FATAL EXCEPTION: main
09-30 22:17:45.680: E/AndroidRuntime(934): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{ph.timskie.dancingfountain/ph.timskie.dancingfountain.MainActivity}: java.lang.ClassNotFoundException: ph.timskie.dancingfountain.MainActivity
09-30 22:17:45.680: E/AndroidRuntime(934): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1883)
09-30 22:17:45.680: E/AndroidRuntime(934): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1984)
09-30 22:17:45.680: E/AndroidRuntime(934): at android.app.ActivityThread.access$600(ActivityThread.java:126)
09-30 22:17:45.680: E/AndroidRuntime(934): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1150)
09-30 22:17:45.680: E/AndroidRuntime(934): at android.os.Handler.dispatchMessage(Handler.java:99)
09-30 22:17:45.680: E/AndroidRuntime(934): at android.os.Looper.loop(Looper.java:137)
09-30 22:17:45.680: E/AndroidRuntime(934): at android.app.ActivityThread.main(ActivityThread.java:4456)
09-30 22:17:45.680: E/AndroidRuntime(934): at java.lang.reflect.Method.invokeNative(Native Method)
09-30 22:17:45.680: E/AndroidRuntime(934): at java.lang.reflect.Method.invoke(Method.java:511)
09-30 22:17:45.680: E/AndroidRuntime(934): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
09-30 22:17:45.680: E/AndroidRuntime(934): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
09-30 22:17:45.680: E/AndroidRuntime(934): at dalvik.system.NativeStart.main(Native Method)
09-30 22:17:45.680: E/AndroidRuntime(934): Caused by: java.lang.ClassNotFoundException: ph.timskie.dancingfountain.MainActivity
09-30 22:17:45.680: E/AndroidRuntime(934): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
09-30 22:17:45.680: E/AndroidRuntime(934): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
09-30 22:17:45.680: E/AndroidRuntime(934): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
09-30 22:17:45.680: E/AndroidRuntime(934): at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
09-30 22:17:45.680: E/AndroidRuntime(934): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1874)
09-30 22:17:45.680: E/AndroidRuntime(934): ... 11 more
Androidmanifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ph.timskie.dancingfountain"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="ph.timskie.dancingfountain.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Rock"></activity>
<activity android:name=".Punk"></activity>
<activity android:name=".Classical"></activity>
<activity android:name=".OPM"></activity>
<activity android:name=".Pop"></activity>
</application>
</manifest>
答案 0 :(得分：1)
您需要将MainActivity添加到Android清单文件中。
<activity
android:name="ph.timskie.dancingfountain.MainActivity"
android:label="@string/app_name"
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
编辑：
以下是使用ActionBarSherlock的应用程序中的AndroidManifest：
<?xml version="1.0" encoding="utf-8"?>
<uses-sdk
android:minSdkVersion="7"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/Theme.Sherlock.Light" >
<activity
android:name=".ERGProActivity"
android:screenOrientation="portrait"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
确保您使用的是ActionBarSherlock主题。