Как перейти на другую активность при нажатии на Gridviewpager?

Question

Я пытаюсь запустить новое определенное действие, основанное на том, какую страницу я нажимаю в Gridview. Я попытался понять образец GridViewPager, который идет вместе с sdk и пытается адаптировать given explanation. Но я действительно не знаю, как объединить эти две вещи и даже с чего начать.

Первый java.file Выбор

public class Selection extends Activity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState){ 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.selection_grid); 
     final GridViewPager pager = (GridViewPager) findViewById(R.id.pager); 

     pager.setAdapter(new Workers(this, getFragmentManager())); 
     DotsPageIndicator dotsPageIndicator = (DotsPageIndicator) findViewById(R.id.page_indicator); 
     dotsPageIndicator.setPager(pager); 
    } 
} 

и второй java.file пользователей:

public class Users extends FragmentGridPagerAdapter { 

    private static final int TRANSITION_DURATION_MILLIS = 100; 

    private final Context mContext; 
    private List<Row> mRows; 
    private ColorDrawable mDefaultBg; 

    private ColorDrawable mClearBg; 

    public Users (Context ctx, FragmentManager fm) { 
     super(fm); 
     mContext = ctx; 

     mRows = new ArrayList<Workers.Row>(); 

     mRows.add(new Row(cardFragment(R.string.title, R.string.user1))); 
     mRows.add(new Row(cardFragment(R.string.title, R.string.user2))); 
     mRows.add(new Row(cardFragment(R.string.title, R.string.user3))); 
     mRows.add(new Row(cardFragment(R.string.title, R.string.user4))); 

//  In case in one row several cardFragments are needed 
//  mRows.add(new Row(
//    cardFragment(R.string.cards_title, R.string.cards_text), 
//    cardFragment(R.string.expansion_title, R.string.expansion_text))); 

     mDefaultBg = new ColorDrawable(R.color.dark_grey); 
     mClearBg = new ColorDrawable(android.R.color.transparent); 
    } 


    LruCache<Integer, Drawable> mRowBackgrounds = new LruCache<Integer, Drawable>(3) { 
     @Override 
     protected Drawable create(final Integer row) { 
      int resid = BG_IMAGES[row % BG_IMAGES.length]; 
      new DrawableLoadingTask(mContext) { 
       @Override 
       protected void onPostExecute(Drawable result) { 
        TransitionDrawable background = new TransitionDrawable(new Drawable[] { 
          mDefaultBg, 
          result 
        }); 
        mRowBackgrounds.put(row, background); 
        notifyRowBackgroundChanged(row); 
        background.startTransition(TRANSITION_DURATION_MILLIS); 
       } 
      }.execute(resid); 
      return mDefaultBg; 
     } 
    }; 


    private Fragment cardFragment(int titleRes, int textRes) { 
     Resources res = mContext.getResources(); 
     CardFragment fragment = 
       CardFragment.create(res.getText(titleRes), res.getText(textRes)); 
     // Add some extra bottom margin to leave room for the page indicator 
     fragment.setCardMarginBottom(
       res.getDimensionPixelSize(R.dimen.card_margin_bottom)); 
     return fragment; 

-----------------Changed part - Start (deleted the above part of the method)---------------- 
//  Resources res = mContext.getResources(); 
//  MyCardFragment.create(res.getText(titleRes), res.getText(textRes)); 
-----------------Changed part - End------------------ 
     } 


static final int[] BG_IMAGES = new int[] { 
      R.drawable.user1, 
      R.drawable.user2, 
      R.drawable.user3, 
      R.drawable.user4 
    }; 


    /** A convenient container for a row of fragments. */ 
    private class Row { 
     final List<Fragment> columns = new ArrayList<Fragment>(); 

     public Row(Fragment... fragments) { 
      for (Fragment f : fragments) { 
       add(f); 
      } 
     } 

     public void add(Fragment f) { 
      columns.add(f); 
     } 

     Fragment getColumn(int i) { 
      return columns.get(i); 
     } 

     public int getColumnCount() { 
      return columns.size(); 
     } 
    } 


    @Override 
    public Fragment getFragment(int row, int col) { 
     Row adapterRow = mRows.get(row); 
     return adapterRow.getColumn(col); 
    } 

    @Override 
    public Drawable getBackgroundForRow(final int row) { 
     return mRowBackgrounds.get(row); 
    } 


    @Override 
    public int getRowCount() { 
     return mRows.size(); 
    } 

    @Override 
    public int getColumnCount(int rowNum) { 
     return mRows.get(rowNum).getColumnCount(); 
    } 

    class DrawableLoadingTask extends AsyncTask<Integer, Void, Drawable> { 
     private static final String TAG = "Loader"; 
     private Context context; 

     DrawableLoadingTask(Context context) { 
      this.context = context; 
     } 

     @Override 
     protected Drawable doInBackground(Integer... params) { 
      Log.d(TAG, "Loading asset 0x" + Integer.toHexString(params[0])); 
      return context.getResources().getDrawable(params[0]); 
     } 
    } 
} 

EDIT: Третий java.file MyCardFragment

public class MyCardFragment extends CardFragment { 

private View fragmentView; 

@Override 
protected View onCreateContentView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { 
    fragmentView = super.onCreateContentView(inflater, container, savedInstanceState); 
    return fragmentView; 
} 

public void setOnClickListener(final View.OnClickListener listener) { 
    this.fragmentView.setOnClickListener(listener); 
    } 

} 

UPDATE LogCat:

02-24 13:53:18.149 3104-3104/de.denjo.fragmentapplication E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    Process: de.denjo.fragmentapplication, PID: 3104 
    java.lang.IllegalStateException: Could not execute method of the activity 
      at android.view.View$1.onClick(View.java:4007) 
      at android.view.View.performClick(View.java:4756) 
      at android.view.View$PerformClick.run(View.java:19749) 
      at android.os.Handler.handleCallback(Handler.java:739) 
      at android.os.Handler.dispatchMessage(Handler.java:95) 
      at android.os.Looper.loop(Looper.java:135) 
      at android.app.ActivityThread.main(ActivityThread.java:5221) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:372) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
    Caused by: java.lang.reflect.InvocationTargetException 
      at java.lang.reflect.Method.invoke(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:372) 
      at android.view.View$1.onClick(View.java:4002) 
            at android.view.View.performClick(View.java:4756) 
            at android.view.View$PerformClick.run(View.java:19749) 
            at android.os.Handler.handleCallback(Handler.java:739) 
            at android.os.Handler.dispatchMessage(Handler.java:95) 
            at android.os.Looper.loop(Looper.java:135) 
            at android.app.ActivityThread.main(ActivityThread.java:5221) 
            at java.lang.reflect.Method.invoke(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:372) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
    Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {de.denjo.fragmentapplication/android.text.Selection}; have you declared this activity in your AndroidManifest.xml? 
      at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1761) 
      at android.app.Instrumentation.execStartActivity(Instrumentation.java:1485) 
      at android.app.Activity.startActivityForResult(Activity.java:3736) 
      at android.app.Activity.startActivityForResult(Activity.java:3697) 
      at android.app.Activity.startActivity(Activity.java:4007) 
      at android.app.Activity.startActivity(Activity.java:3975) 
      at de.denjo.fragmentapplication.MainActivity.OnClickSelection(MainActivity.java:35) 
            at java.lang.reflect.Method.invoke(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:372) 
            at android.view.View$1.onClick(View.java:4002) 
            at android.view.View.performClick(View.java:4756) 
            at android.view.View$PerformClick.run(View.java:19749) 
            at android.os.Handler.handleCallback(Handler.java:739) 
            at android.os.Handler.dispatchMessage(Handler.java:95) 
            at android.os.Looper.loop(Looper.java:135) 
            at android.app.ActivityThread.main(ActivityThread.java:5221) 
            at java.lang.reflect.Method.invoke(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:372) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 

Answer 1

Вот как я бы это сделать

Продлить CardFragment: (!, А также посмотреть на обновленный MyCardFragment или вы получите NullPointerException)

class MyCardFragment extends CardFragment { 

    private View fragmentView;  
    private OnClickListener listener; 

    @Override 
    protected View onCreateContentView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { 
     fragmentView = super.onCreateContentView(inflater, container, savedInstanceState); 
     fragmentView.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(final View view) { 
       if (listener != null) { 
        listener.onClick(view); 
       } 
      }  

     } 
     return fragmentView; 
    } 

    public void setOnClickListener(final OnClickListener listener) { 
     this.listener = listener; 
    } 

} 

Это все :)

UPD:

private Fragment cardFragment(int titleRes, int textRes) { 
     Resources res = mContext.getResources(); 
     final MyCardFragment fragment = MyCardFragment.create(res.getText(titleRes), res.getText(textRes)); 
     fragment.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(final View view) { 
        //do everything you want 
        //here you've got access to clicked fragment 
      } 

     } 
     return fragment; 
}