标签: android-fragments

我尝试了Android兼容包提供的示例.FragmentTabsPager崩溃并出现以下错误:

11-17 19:00:27.414: E/AndroidRuntime(5401): FATAL EXCEPTION: main
11-17 19:00:27.414: E/AndroidRuntime(5401): java.lang.NoClassDefFoundError: com.example.android.supportv4.app.LoaderCustomSupport$AppListFragment
11-17 19:00:27.414: E/AndroidRuntime(5401):     at com.example.android.supportv4.app.FragmentTabsPager.onCreate(FragmentTabsPager.java:60)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2633)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2685)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at android.app.ActivityThread.access$2300(ActivityThread.java:126)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2038)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at android.os.Looper.loop(Looper.java:123)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at android.app.ActivityThread.main(ActivityThread.java:4633)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at java.lang.reflect.Method.invokeNative(Native Method)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at java.lang.reflect.Method.invoke(Method.java:521)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
11-17 19:00:27.414: E/AndroidRuntime(5401):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
11-17 …

我在我的所有应用程序片段中使用此代码,如果我使用静态方法应该会更好.我该怎么做？这种静态方法也适用于片段,而不仅仅是活动.

我的非静态showToast方法:

public void showToast(String msg){
    Toast.makeText(getActivity().getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
}

使用这种静态方法解决了感谢@KishanDhamat

public static void showToast(Context context, String text) {
Toast.makeText(context, text, Toast.LENGTH_LONG).show();

}

我如何从片段中清除共享偏好？谢谢

 @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
       sharedPreferences = getActivity().getSharedPreferences("login.conf", Context.MODE_PRIVATE);

        editor = sharedPreferences.edit();
        editor.clear();
        editor.commit();
        Intent logout = new Intent(getActivity(), LoginActivity.class);
        startActivity(logout);
        Log.d(TAG, sharedPreferences.getString("username", ""));
        Log.d(TAG, sharedPreferences.getString("password", ""));
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_fragment_logout, container, false);
    }

那是我的片段

我有两个不同的活动,我想在另一个活动中同时显示它们.有没有办法做到这一点？

提前致谢!

我想将 my_fragment1 实现到 tab1 片段中，如何将片段组合成片段。

表1

 public class Tab1 extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.tab1, container, false);
    list_fragment fm = (list_fragment)getActivity().getSupportFragmentManager().findFragmentById(R.id.My_Container_1_ID);
}

表1.xml

 <FrameLayout
        android:id="@+id/My_Container_1_ID"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:layout_alignParentTop="true"
        android:layout_toLeftOf="@+id/button"
        android:layout_toStartOf="@+id/button">
    </FrameLayout>

我有一个数字字符串，我想将字符串的前三个字符更改为另一个字符

假设我有一个像0333XXXXXXXand的字符串 +38333XXXXXXX。如果字符串的第一个字符是+38我想用“0”替换它，而其余的字符串保持不变这是我的代码

        private String modifyNumber(String num) {
                if (num.startsWith("+38")) {
                    num.replaceFirst("+38", "0");}
                   return num;}

“+38”在num.replaceFirst.