將數據從片段傳遞到Android中的活動

Question

我正在使用片段作爲我的第一個屏幕，我有一個Onclick必須帶給我不同活動的按鈕。

這裏是我的代碼：

HomeFragment.Java：

package info.androidhive.navigationdrawer.fragment; 

import android.content.Context; 
import android.net.Uri; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 

import info.androidhive.navigationdrawer.R; 


public class HomeFragment extends Fragment { 
    // TODO: Rename parameter arguments, choose names that match 
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER 
    private static final String ARG_PARAM1 = "param1"; 
    private static final String ARG_PARAM2 = "param2"; 

    // TODO: Rename and change types of parameters 
    private String mParam1; 
    private String mParam2; 

    private OnFragmentInteractionListener mListener; 

    public HomeFragment() { 
     // Required empty public constructor 
    } 

    /** 
    * Use this factory method to create a new instance of 
    * this fragment using the provided parameters. 
    * 
    * @param param1 Parameter 1. 
    * @param param2 Parameter 2. 
    * @return A new instance of fragment HomeFragment. 
    */ 
    // TODO: Rename and change types and number of parameters 
    public static HomeFragment newInstance(String param1, String param2) { 
     HomeFragment fragment = new HomeFragment(); 
     Bundle args = new Bundle(); 
     args.putString(ARG_PARAM1, param1); 
     args.putString(ARG_PARAM2, param2); 
     fragment.setArguments(args); 
     return fragment; 
    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     if (getArguments() != null) { 
      mParam1 = getArguments().getString(ARG_PARAM1); 
      mParam2 = getArguments().getString(ARG_PARAM2); 
     } 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     // Inflate the layout for this fragment 
     return inflater.inflate(R.layout.fragment_home, container, false); 
    } 

    // TODO: Rename method, update argument and hook method into UI event 
    public void onButtonPressed(Uri uri) { 
     if (mListener != null) { 
      mListener.onFragmentInteraction(uri); 
     } 
    } 

    @Override 
    public void onAttach(Context context) { 
     super.onAttach(context); 
//  if (context instanceof OnFragmentInteractionListener) { 
//   mListener = (OnFragmentInteractionListener) context; 
//  } else { 
//   throw new RuntimeException(context.toString() 
//     + " must implement OnFragmentInteractionListener"); 
//  } 
    } 

    @Override 
    public void onDetach() { 
     super.onDetach(); 
     mListener = null; 
    } 

    /** 
    * This interface must be implemented by activities that contain this 
    * fragment to allow an interaction in this fragment to be communicated 
    * to the activity and potentially other fragments contained in that 
    * activity. 
    * <p> 
    * See the Android Training lesson <a href= 
    * "http://developer.android.com/training/basics/fragments/communicating.html" 
    * >Communicating with Other Fragments</a> for more information. 
    */ 
    public interface OnFragmentInteractionListener { 
     // TODO: Update argument type and name 
     void onFragmentInteraction(Uri uri); 
    } 
} 

HomeFragment.XML

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context="info.androidhive.navigationdrawer.fragment.HomeFragment"> 

    <ImageView 
     android:layout_width="100dp" 
     android:layout_height="100dp" 
     android:layout_gravity="center" 
     android:alpha="0.3" 
     android:src="@drawable/ic_home_black_24dp" /> 

    <Button 
     android:id="@+id/button" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Button" /> 

</FrameLayout> 

Activity.JAVA

package info.androidhive.navigationdrawer.activity; 

import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.MenuItem; 

import info.androidhive.navigationdrawer.R; 

public class ChoseFoodCourt extends AppCompatActivity { 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_about_us); 
     getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == android.R.id.home) { 
      // finish the activity 
      onBackPressed(); 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
} 

我還增加了活動在男人中ifest文件。 請幫我在HomeFragment.JAVA中添加onclick監聽器。不知道在哪裏調用onclick監聽器。

在此先感謝。

Answer 1

只需使用developers.android.com中的以下代碼即可。在那裏你還會找到OnClickListener如何工作的解釋。

public class MyActivity extends Activity { 
protected void onCreate(Bundle icicle) { 
    super.onCreate(icicle); 

    setContentView(R.layout.content_layout_id); 

    final Button button = (Button) findViewById(R.id.button_id); 
    button.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      // Perform action on click 
     } 
    }); 
} 

}