如何檢測一個片段內的動態創建的按鈕被點擊，從活動？

Question

我有一個Fragment類，它動態地創建一個按鈕的網格。然後在顯示網格的主活動中創建該片段的一個實例。這裏是我的代碼：

Grid.java

public class Grid extends Fragment { 

    LinearLayout myLayout; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     myLayout = new LinearLayout(getActivity()); 
     LayoutParams lparams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); 
     myLayout.setLayoutParams(lparams); 
     myLayout.setOrientation(LinearLayout.VERTICAL); 

     for (int i = 0; i < 4; i++) { 
      LinearLayout row = new LinearLayout(getActivity()); 
      LayoutParams rowParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); 
      row.setLayoutParams(rowParams); 

      for (int j = 0; j < 4; j++) { 
       final Button btnTag = new Button(getActivity()); 
       LayoutParams btnParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); 

       btnTag.setLayoutParams(btnParams); 
       btnTag.setText(" " + (j + 1 + (i * 4))); 
       btnTag.setId(j + 1 + (i * 4)); 
       row.addView(btnTag); 
      } 

      myLayout.addView(row); 
     } 
     return myLayout; 
    } 
} 

MainActivity.java

public class MainActivity extends AppCompatActivity { 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.content_mainactivity); 
     Grid grid = new Grid(); 
     FragmentManager manager = getSupportFragmentManager(); 
     FragmentTransaction transaction = manager.beginTransaction(); 
     transaction.add(R.id.grid, grid); 
     transaction.commit(); 
    } 
} 

而且除了這裏是我的content_mainactivity.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:orientation="vertical" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:id="@+id/content_mainactivity" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" 
    tools:context="com.example.owner.tables.MainActivity" 
    tools:showIn="@layout/activity_mainactivity"> 

    <FrameLayout 
     android:layout_width="320dp" 
     android:layout_height="320dp" 
     android:id="@+id/grid" 
     android:layout_centerHorizontal="true"> 
    </FrameLayout> 

</RelativeLayout> 

所以我的問題是，我該如何檢測是否和哪個按鈕在活動的片段中被點擊？或者如果我可以在片段中做到這一點，如何將信息傳遞給活動？

Answer 1

使用界面將點擊事件傳遞給您的活動。在OnClickListener中調用它的方法。

Answer 2

在MainActivity

public void doSomethingAtClick() {...} 

在片段

((MainActivity)getActivity()).doSomethingAtClick() 

Answer 3

創建的接口：

public interface MyGridInterface { 
    void myAction(<Params...>); 
} 

集偵聽在片段：

MainActivity mActivity = new MainActivity(); 
setEleListener(mActivity); 

public void setMyListener(MyGridInterface listener) { 
     this.gListener = listener; 
    } 

在MainActivity中實現監聽器

public class MainActivity extends AppCompatActivity implements MyGridInterface{ 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.content_mainactivity); 
     Grid grid = new Grid(); 
     FragmentManager manager = getSupportFragmentManager(); 
     FragmentTransaction transaction = manager.beginTransaction(); 
     transaction.add(R.id.grid, grid); 
     transaction.commit(); 
    } 


    @Override 
    public void myAction(<Params..>) { 

     //Here do whatever you want 
    } 

}