相关疑难解决方法(0)

我试图在同一活动中实现导航抽屉和视图寻呼机.导航抽屉工作正常,但视图寻呼机不工作,我也在导航抽屉打开时右侧滑动指针(空指针在android.支持.v4.小部件.GrawerLayout.isContentView(DrawerLayout.java:840).我我附加了主要的xml布局和代码.

<android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
</android.support.v4.view.ViewPager>

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >     
    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="#111"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp" />
</android.support.v4.widget.DrawerLayout>

活动类如下

public class MainActivity extends Activity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;

private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mPlanetTitles;
private MainActivity mContext;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mContext = this;
    ViewPager vp = (ViewPager) findViewById(R.id.viewpager);
    CustomPagerAdapter adapter = new CustomPagerAdapter(mContext);
    vp.setAdapter(adapter);
    vp.setPageTransformer(false, new ViewPager.PageTransformer() {

        @Override
        public …