当我在 android 3.0 及更高版本中运行我的应用程序时，我正在处理 android 片段，它工作正常，但是当我尝试在 3.0 以下运行时，它给出了 forceclose 错误，我不明白出了什么问题。下面是日志猫错误和我的代码。
如果在智能手机中运行我的应用程序，那么我需要在另一个窗口中显示视图而不打开新活动。你能指导我如何做到这一点。它在平板电脑上运行良好。我正在发送平板电脑的工作屏幕截图。
01-21 09:29:24.272: E/AndroidRuntime(398): FATAL EXCEPTION: main
01-21 09:29:24.272: E/AndroidRuntime(398): java.lang.NoSuchMethodError: com.example.fragment_demo.MainActivity.getFragmentManager
01-21 09:29:24.272: E/AndroidRuntime(398): at com.example.fragment_demo.MainActivity.onCreate(MainActivity.java:19)
01-21 09:29:24.272: E/AndroidRuntime(398): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-21 09:29:24.272: E/AndroidRuntime(398): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
01-21 09:29:24.272: E/AndroidRuntime(398): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
01-21 09:29:24.272: E/AndroidRuntime(398): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
01-21 09:29:24.272: E/AndroidRuntime(398): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
01-21 09:29:24.272: E/AndroidRuntime(398): at android.os.Handler.dispatchMessage(Handler.java:99)
01-21 09:29:24.272: E/AndroidRuntime(398): at android.os.Looper.loop(Looper.java:123)
01-21 09:29:24.272: E/AndroidRuntime(398): at android.app.ActivityThread.main(ActivityThread.java:3683)
01-21 09:29:24.272: E/AndroidRuntime(398): at java.lang.reflect.Method.invokeNative(Native Method)
01-21 09:29:24.272: E/AndroidRuntime(398): at java.lang.reflect.Method.invoke(Method.java:507)
01-21 09:29:24.272: E/AndroidRuntime(398): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-21 09:29:24.272: E/AndroidRuntime(398): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-21 09:29:24.272: E/AndroidRuntime(398): at dalvik.system.NativeStart.main(Native Method)
public class MainActivity extends Activity {
Button b1, b2, b3;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main_fdemo);
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
StartFragment sf = new StartFragment();
ft.add(R.id.myFragment, sf);
ft.commit();
b1 = (Button) findViewById(R.id.button1);
b2 = (Button) findViewById(R.id.button2);
b3 = (Button) findViewById(R.id.button3);
b1.setOnClickListener(onButtonClick);
b2.setOnClickListener(onButtonClick);
b3.setOnClickListener(onButtonClick);
}
Button.OnClickListener onButtonClick = new Button.OnClickListener(){
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
Fragment fragment = null;
if(v == b1){
fragment = new Fragment1();
}else if(v == b2){
fragment = new Fragment2();
}else if(v == b3){
fragment = new Fragment3();
}
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.myFragment, fragment);
ft.commit();
}
};
}
main_fdemo.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="horizontal" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fragment 1" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fragment 2" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fragment 3" />
</LinearLayout>
<LinearLayout
android:id="@+id/myFragment"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_weight="3" >
</LinearLayout>
</LinearLayout>
public class StartFragment extends Fragment
{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
// TODO Auto-generated method stub
return inflater.inflate(R.layout.start_fragment, container, false);
}
}
start_fragment.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:background="#ffffff"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="Select the Fragments"
android:textSize="20dp" />
</LinearLayout>
public class Fragment1 extends Fragment
{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment_1, container, false);
}
}
fragment_1.xml code:-
<?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:background="#F97C7C"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="Select the Fragments"
android:textSize="20dp" />
</LinearLayout>
