グリッドメニュー内の別のインテントを開き、それらの間のナビゲーション

Question

こんにちは私はアクティビティのグリッドメニューを作っています。問題は、特定のイメージをクリックすると、他のインテントを開くべきであり、エラーを出すことも、他のインテントを開くこともないということです。親切のAndroidManifest.xmlにbないにも

public class Mood extends Activity { 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 

     super.onCreate(savedInstanceState); 
     setContentView(R.layout.mood); 

     GridView gridview = (GridView) findViewById(R.id.gridview); 
     gridview.setAdapter(new ImageAdapter(this)); 

     gridview.setOnItemClickListener(new OnItemClickListener() { 
      public void onItemClick(AdapterView<?> parent, View v, int position, long id) { 
       switch (position) { 
       case 0:  
        Intent intent = new Intent(v.getContext(),a.class); 
         startActivity(intent); 
       break; 

       case 1:  
        Intent intent4 = new Intent(v.getContext(),b.class); 
         startActivity(intent4); 
       break; 



       default:  
       break; 
      } 

     } 


     }); 
    } 

    public class ImageAdapter extends BaseAdapter { 
     private Context mContext; 

     public ImageAdapter(Context c) { 
      mContext = c; 
     } 

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

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

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

     // create a new ImageView for each item referenced by the Adapter 
     public View getView(int position, View convertView, ViewGroup parent) { 
      View grid; 

      if (convertView == null) { // if it's not recycled, initialize some 
       // attributes 
       grid = new View(mContext); 
       LayoutInflater inflater = getLayoutInflater(); 
       grid = inflater.inflate(R.layout.moodcus, parent, false); 

      } else { 
       grid = (View) convertView; 

      } 
      ImageView imageView = (ImageView) grid.findViewById(R.id.imgview); 
      TextView textView = (TextView) grid.findViewById(R.id.txtview); 
      imageView.setImageResource(mThumbIds[position]); 
      textView.setText(mMoodnames[position]); 
      return grid; 
     } 

     // references to our images 
     private Integer[] mThumbIds = { R.drawable.icon, 
       R.drawable.icon }; 

     private String[] mMoodnames = { "Angry", "Bored"}; 
    } 


} 

XMLです

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" android:layout_height="fill_parent" 
    android:orientation="vertical"> 
    <ImageView android:id="@+id/imgview" android:layout_width="60dip" 
     android:layout_height="60dip" android:layout_gravity="center" /> 


    <TextView android:id="@+id/txtview" android:layout_width="wrap_content" 
     android:textColor="#ffffff" android:layout_height="wrap_content" 
     android:layout_gravity="center" /> 

</LinearLayout> 

と

<?xml version="1.0" encoding="utf-8"?> 
<GridView 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/gridview" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:padding="5dp" 
android:verticalSpacing="5dp" 
android:horizontalSpacing="10dp" 
android:numColumns="auto_fit" 
android:columnWidth="80dp" 
android:stretchMode="columnWidth" 
android:gravity="center_horizontal" 
    android:scaleType="fitXY" 
android:background="@drawable/ac" 
/> 

logcat

07-13 05:16:17.642: ERROR/AndroidRuntime(28966): Uncaught handler: thread main exiting due to uncaught exception 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966): android.content.ActivityNotFoundException: Unable to find explicit activity class {Dynamicgrid.test/Dynamicgrid.test.a}; have you declared this activity in your AndroidManifest.xml? 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.app.Activity.startActivityForResult(Activity.java:2789) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.app.Activity.startActivity(Activity.java:2895) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at Dynamicgrid.test.Mood$1.onItemClick(Mood.java:39) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.widget.AdapterView.performItemClick(AdapterView.java:284) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.widget.AbsListView.onKeyUp(AbsListView.java:1757) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.widget.GridView.commonKey(GridView.java:1470) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.widget.GridView.onKeyUp(GridView.java:1382) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.view.KeyEvent.dispatch(KeyEvent.java:1249) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.view.View.dispatchKeyEvent(View.java:3683) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:758) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:760) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:760) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:760) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1691) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1111) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.app.Activity.dispatchKeyEvent(Activity.java:2045) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1667) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.view.ViewRoot.deliverKeyEventToViewHierarchy(ViewRoot.java:2390) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2360) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1658) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.os.Looper.loop(Looper.java:123) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at android.app.ActivityThread.main(ActivityThread.java:4595) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at java.lang.reflect.Method.invoke(Method.java:521) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
07-13 05:16:17.782: ERROR/AndroidRuntime(28966):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

宣言活動aを導きますRES /メニューフォルダでのthatsそれ

メニューからonother活動を開くため、このファイルを置くyourmenu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"> 
    <item 
     android:id="@+id/menuitem1" 
     android:title="Option1" 
     android:orderInCategory="1" 
     android:icon="@drawable/_icon1"> 
    </item> 
    <item 
     android:id="@+id/menuitem2" 
     android:title="Option2" 
     android:orderInCategory="2" 
     android:icon="@drawable/_icon2"> 
    </item> 
    <item 
     android:id="@+id/menuitem3" 
     android:title="Option3" 
     android:orderInCategory="3" 
     android:icon="@drawable/_icon3"> 
    </item> 
</menu> 

...

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 

    // SELECTING MENU FROM RESOURCE 
    getMenuInflater().inflate(R.menu.ypurmenu, menu); 

    // RETURN TRUE TO DISPLAY MENU 
    return true; 

} 
@Override 
public boolean onOptionsItemSelected(MenuItem item) { 

    if(item.getTitle().equals("Option1")){ 

     startActivity(new Intent(getApplicationContext(), AnotherActivityX.class)); // It Can be your GridViewActivity 
     finish(); 

    } 
    else if(item.getTitle().equals("Option2")){ 

     startActivity(new Intent(getApplicationContext(), AnotherActivityY.class)); 
     finish(); 

    } 
    else if(item.getTitle().equals("Option3")){ 

     startActivity(new Intent(getApplicationContext(), AnotherActivityZ.class)); 
     finish(); 

    } 

    return super.onOptionsItemSelected(item); 

} 

それとも、時にユーザーを押して直接任意の活動を開きたい場合メニューボタンは単純な解決策よりも簡単です...

@Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     startActivity(new Intent(this, AnyActivity.class));//Also you can write finish() here if if you want to back at previous activity 
     return super.onCreateOptionsMenu(menu); 
    }