Question

我正在解决一个问题，即在屏幕轮换时修复活动重启，我正在实施the 2nd part of this answer，它在setContentView(R.layout.fragment_introduction)中给出了错误。

方法setContentView（int）未定义类型IntroductionFragment。

public class IntroductionFragment extends Fragment {

public IntroductionFragment(){}

@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState)
{
    View rootView = inflater.inflate(R.layout.fragment_introduction,container,false);

    return rootView;
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
  super.onConfigurationChanged(newConfig);
  setContentView(R.layout.fragment_introduction);
}

}

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.indianconstitution"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="18" />

<application
    android:configChanges="keyboardHidden|orientation|screenSize"
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.indianconstitution.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>
</application>

</manifest>

如何解决此错误？

提前致谢

Answer 1

setContentView是Activity的一种方法。你在Fragment里面。片段的View层次结构基于onCreateView

的返回值构建

Answer 2

您的onConfigurationChanged()方法应如下所示：

@Override
public void onConfigurationChanged(Configuration newConfig) {

    super.onConfigurationChanged(newConfig);
    LayoutInflater inflater = (LayoutInflater)getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view = inflater.inflate(R.layout.fragment_introduction, null);
    ViewGroup rootView = (ViewGroup) getView();
    rootView.removeAllViews();
    rootView.addView(view);

}

setContentView（）在onConfigurationChanged（）中给出错误

2 个答案: