android - 改变 fragment

Question

我试图根据是否启用 GPS 来显示不同的 fragment 。但是我收到了这个错误:-

Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f0e00a1 

请告诉我如何做到这一点:

这是我的 MainActivity 类:

public class MainActivity extends Activity {

Fragment fr;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final LocationManager mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    if (!mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
        fr = new FragmentTwo();
        getFragment();
    } else {
        fr = new FragmentOne();
        getFragment();
    }
}

public void getFragment() {
    FragmentManager fm = getFragmentManager();
    FragmentTransaction fragmentTransaction = fm.beginTransaction();
    fragmentTransaction.replace(R.id.fragment_place, fr);
    fragmentTransaction.commit();
  }
}

fragment 一:-

public class FragmentOne extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_one, container, false);
   }
}

fragment 二:-

public class FragmentTwo extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_two, container, false);
    } 
 }

我的 activity_main:-

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<fragment
    android:id="@+id/fragment_place"
    android:name="com.test.FragmentTwo"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>
</LinearLayout>

fragment_one.xml 和 fragment_two.xml 是相同的，只是文本不同:-

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<TextView
    android:id="@+id/textView1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:text="GPS IS ENABLE"/>
 </RelativeLayout>

提前致谢。

Answer 1

替换

<fragment
    android:id="@+id/fragment_place"
    android:name="com.test.FragmentTwo"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

与

<FrameLayout
    android:id="@+id/fragment_place"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

作为静态Fragment 无法在运行时替换。但您可以在 FrameLayout 中添加或替换 fragment 。