gridview和導航抽屜在android中不能一起工作

我已經下載了gridview代碼和導航欄的代碼。這兩個代碼單獨工作正常，但是當我試圖將它們結合給它一個運行時錯誤「不幸的應用程序已停止」。gridview和導航抽屜在android中不能一起工作

下面是我的代碼：

MainActivity.java

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

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

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    mTitle = mDrawerTitle = getTitle(); 
    mPlanetTitles = getResources().getStringArray(R.array.planets_array); 
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
    mDrawerList = (ListView) findViewById(R.id.left_drawer); 

    // set a custom shadow that overlays the main content when the drawer opens 
    mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); 
    // set up the drawer's list view with items and click listener 
    mDrawerList.setAdapter(new ArrayAdapter<String>(this, 
      R.layout.drawer_list_item, mPlanetTitles)); 
    mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); 

    // enable ActionBar app icon to behave as action to toggle nav drawer 
    getActionBar().setDisplayHomeAsUpEnabled(true); 
    getActionBar().setHomeButtonEnabled(true); 

    // ActionBarDrawerToggle ties together the the proper interactions 
    // between the sliding drawer and the action bar app icon 
    mDrawerToggle = new ActionBarDrawerToggle(
      this,     /* host Activity */ 
      mDrawerLayout,   /* DrawerLayout object */ 
      R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ 
      R.string.drawer_open, /* "open drawer" description for accessibility */ 
      R.string.drawer_close /* "close drawer" description for accessibility */ 
      ) { 
     public void onDrawerClosed(View view) { 
      getActionBar().setTitle(mTitle); 
      invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() 
     } 

     public void onDrawerOpened(View drawerView) { 
      getActionBar().setTitle(mDrawerTitle); 
      invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() 
     } 
    }; 
    mDrawerLayout.setDrawerListener(mDrawerToggle); 

    if (savedInstanceState == null) { 
     selectItem(0); 
    } 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    MenuInflater inflater = getMenuInflater(); 
    inflater.inflate(R.menu.main, menu); 
    return super.onCreateOptionsMenu(menu); 
} 

/* Called whenever we call invalidateOptionsMenu() */ 
@Override 
public boolean onPrepareOptionsMenu(Menu menu) { 
    // If the nav drawer is open, hide action items related to the content view 
    boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); 
    menu.findItem(R.id.action_websearch).setVisible(!drawerOpen); 
    return super.onPrepareOptionsMenu(menu); 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // The action bar home/up action should open or close the drawer. 
    // ActionBarDrawerToggle will take care of this. 
    if (mDrawerToggle.onOptionsItemSelected(item)) { 
     return true; 
    } 
    // Handle action buttons 
    switch(item.getItemId()) { 
    case R.id.action_websearch: 
     // create intent to perform web search for this planet 
     Intent intent = new Intent(Intent.ACTION_WEB_SEARCH); 
     intent.putExtra(SearchManager.QUERY, getActionBar().getTitle()); 
     // catch event that there's no activity to handle intent 
     if (intent.resolveActivity(getPackageManager()) != null) { 
      startActivity(intent); 
     } else { 
      Toast.makeText(this, R.string.app_not_available, Toast.LENGTH_LONG).show(); 
     } 
     return true; 
    default: 
     return super.onOptionsItemSelected(item); 
    } 
} 

/* The click listner for ListView in the navigation drawer */ 
private class DrawerItemClickListener implements ListView.OnItemClickListener { 
    @Override 
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
     selectItem(position); 
    } 
} 

private void selectItem(int position) { 
    // update the main content by replacing fragments 
    Fragment fragment = new PlanetFragment(); 
    Bundle args = new Bundle(); 
    args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position); 
    fragment.setArguments(args); 

    FragmentManager fragmentManager = getFragmentManager(); 
    fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); 

    // update selected item and title, then close the drawer 
    mDrawerList.setItemChecked(position, true); 
    setTitle(mPlanetTitles[position]); 
    mDrawerLayout.closeDrawer(mDrawerList); 
} 
@Override 
protected void onPostCreate(Bundle savedInstanceState) { 
    super.onPostCreate(savedInstanceState); 
    // Sync the toggle state after onRestoreInstanceState has occurred. 
    mDrawerToggle.syncState(); 
} 

@Override 
public void onConfigurationChanged(Configuration newConfig) { 
    super.onConfigurationChanged(newConfig); 
    // Pass any configuration change to the drawer toggls 
    mDrawerToggle.onConfigurationChanged(newConfig); 
} 

/** 
* Fragment that appears in the "content_frame", shows a planet 
*/ 
public static class PlanetFragment extends Fragment { 
    public static final String ARG_PLANET_NUMBER = "planet_number"; 
    GridView gridview; 
    public PlanetFragment() { 
     // Empty constructor required for fragment subclasses 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 
     View rootView = inflater.inflate(R.layout.fragment_planet, container, false); 
     gridview=(GridView) rootView.findViewById(R.id.gridview); 
     ImageAdapter i= new ImageAdapter(this); 
     gridview.setAdapter(i); 
     return rootView; 
    } 
}

ImageAdapter.java

public class ImageAdapter extends BaseAdapter { 

private static final Context PlanetFragment = null; 
private PlanetFragment mContext; 
public ImageAdapter(PlanetFragment c) { 
mContext = c; 
} 

public int getCount() { 
return mThumbIds.length; 
} 

public Object getItem(int position) { 
return null; 
} 

public long getItemId(int position) { 
return 0; 
} 

public View getView(int position, View convertView, ViewGroup parent) { 
ImageView imageView; 
    if (convertView == null) { // if it's not recycled, initialize some attributes 
     imageView = new ImageView(PlanetFragment); 
     imageView.setLayoutParams(new GridView.LayoutParams(150, 150)); 
     imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 
     imageView.setPadding(4, 4, 4, 4); 
    } else { 
     imageView = (ImageView) convertView; 
    } 

    imageView.setImageResource(mThumbIds[position]); 
    return imageView; 
} 

private Integer[] mThumbIds = { 
    R.drawable.snehalaya , R.drawable.prayas_11, 
    R.drawable.vs , R.drawable.adr, 
    R.drawable.anandvan , R.drawable.bgbb, 
    R.drawable.bngvn , R.drawable.dilasa , 
    R.drawable.hohk , R.drawable.jivan, 
    R.drawable.mahan,R.drawable.vishva, 
    R.drawable.saraswati , R.drawable.samaj, 
    R.drawable.atma 

}; 
}

activity_main.xml中

<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"> 

<FrameLayout 
    android:id="@+id/content_frame" 
    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:choiceMode="singleChoice" 
    android:divider="@android:color/transparent" 
    android:dividerHeight="0dp" 
    android:background="#111"/> 
</android.support.v4.widget.DrawerLayout>

drawer_list_item.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@android:id/text1" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:textAppearance="?android:attr/textAppearanceListItemSmall" 
android:gravity="center_vertical" 
android:paddingLeft="16dp" 
android:paddingRight="16dp" 
android:textColor="#fff" 
android:background="?android:attr/activatedBackgroundIndicator" 
android:minHeight="?android:attr/listPreferredItemHeightSmall"/>

fragment_planet.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_weight="6" 
    android:background="#000000" 
    > 
<GridView 
    android:id="@+id/gridview" 
    android:layout_width="fill_parent" 
    android:layout_height="424dp" 
    android:layout_marginTop="10dp" 
    android:background="#000000" 
    android:columnWidth="120dp" 
    android:horizontalSpacing="10dp" 
    android:numColumns="3" 
    android:stretchMode="spacingWidthUniform" 
    android:verticalSpacing="10dp" /> 
</LinearLayout>

的logcat：

01-25 17:27:48.637: E/Trace(892): error opening trace file: No such file or directory (2) 
01-25 17:27:49.558: E/AndroidRuntime(892): FATAL EXCEPTION: main 
01-25 17:27:49.558: E/AndroidRuntime(892): java.lang.NullPointerException 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewConfiguration.get(ViewConfiguration.java:318) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.View.<init>(View.java:3234) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.ImageView.<init>(ImageView.java:105) 
01-25 17:27:49.558: E/AndroidRuntime(892): at com.example.android.navigationdrawerexample.ImageAdapter.getView(ImageAdapter.java:35) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.AbsListView.obtainView(AbsListView.java:2159) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.GridView.onMeasure(GridView.java:1040) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.View.measure(View.java:15513) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1052) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.LinearLayout.onMeasure(LinearLayout.java:590) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.View.measure(View.java:15513) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.View.measure(View.java:15513) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:615) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.View.measure(View.java:15513) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.View.measure(View.java:15513) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.LinearLayout.measureVertical(LinearLayout.java:847) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.View.measure(View.java:15513) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
01-25 17:27:49.558: E/AndroidRuntime(892): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2176) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.View.measure(View.java:15513) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1874) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1089) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1265) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.Choreographer.doCallbacks(Choreographer.java:562) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.Choreographer.doFrame(Choreographer.java:532) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.os.Handler.handleCallback(Handler.java:725) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.os.Handler.dispatchMessage(Handler.java:92) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.os.Looper.loop(Looper.java:137) 
01-25 17:27:49.558: E/AndroidRuntime(892): at android.app.ActivityThread.main(ActivityThread.java:5039) 
01-25 17:27:49.558: E/AndroidRuntime(892): at java.lang.reflect.Method.invokeNative(Native Method) 
01-25 17:27:49.558: E/AndroidRuntime(892): at java.lang.reflect.Method.invoke(Method.java:511) 
01-25 17:27:49.558: E/AndroidRuntime(892): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
01-25 17:27:49.558: E/AndroidRuntime(892): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
01-25 17:27:49.558: E/AndroidRuntime(892): at dalvik.system.NativeStart.main(Native Method)

來源

2014-01-24 user3228219

顯示你的崩潰日誌？ –

嗨阿米特我已經添加logcat的代碼 – user3228219

檢查我的答案，你必須使用活力或上下文實例。 –

待辦事項ImageAdapter初始化喜歡這個 -

ImageAdapter i= new ImageAdapter(getActivity());

和ImageAdapter類，更改喜歡這 -

private Activity mContext; 
public ImageAdapter(Activity c) 
{ 
    mContext = c; 
}

，然後在getView（） -

imageView = new ImageView(mContext);

來源

2014-01-24 19:45:38

做完上面的代碼後，在ImageAdapter這一行改變它提供一個錯誤「沒有可以在範圍內訪問MainActivity類型的封閉實例」（new ImageAdapter（MainActivity.this））。 – user3228219

@ user3228219查看我在答案中所做的更改。 –

按照您的建議進行更改後，應用程序在運行時不幸停止。 – user3228219

gridview和導航抽屜在android中不能一起工作

回答

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