作业

package project.animalsound;

 

import android.app.ListFragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ListView;

 

public class TabFirst extends ListFragment {

 

      private AnimalListAdapter adapter = null;

     

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

       

        adapter = new AnimalListAdapter (getActivity());

        setListAdapter(adapter); 

    }

 

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

            Bundle savedInstanceState) {

        View v = inflater.inflate(R.layout.tab_first, container, false);

        return v;

    }

   

      @Override

      public void onListItemClick(ListView l, View v, int position, long id) {

           System.out.println("Click On List Item!!!");

           super.onListItemClick(l, v, position, id);

      }

}

使用Tabs+ListFragment作为表现形式

在onCreateView中增加View v = inflater.inflate(R.layout.tab_first, container, false);

R.layout.tab_first为：

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

 

    <ListView

        android:id="@+id/android:list"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

         />

 

</RelativeLayout>

布局：<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/animal"
        android:layout_width="wrap_content"
        android:layout_height="80dp"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:layout_margin="1dp" />

  <LinearLayout
        android:layout_height="fill_parent"
        android:layout_width="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_toRightOf="@id/animal"
        android:layout_centerVertical="true"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/cn_word"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:textColor="#191970"
            android:textSize="30sp" />

        <TextView
            android:id="@+id/en_word"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:textColor="#800080" 
            android:textSize="30sp"/>
    </LinearLayout>
    
      <ImageView
        android:id="@+id/speaker"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        
        android:layout_alignParentRight="true"
        android:layout_margin="15dp"
        android:layout_centerVertical="true"
        
        
        android:src="@drawable/speaker"
        />

</RelativeLayout>

但需要从user.xml获得对象信息。

这里可以使用Adapter完成注册Listener的过程。我们继承BaseAdapter，然后在getView中实现整个初始化的过程。

package project.animalsound;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

class ViewHolder {  
public ImageView animal;
public TextView cn_word;
public TextView en_word;
public ImageView speaker;  
}  

public class AnimalListAdapter extends BaseAdapter {  
private LayoutInflater mInflater = null;
public AnimalListAdapter(Context context){
super();
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return 50;
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

ViewHolder holder = null;  
if (convertView == null) {  
holder = new ViewHolder();  
convertView = mInflater.inflate(R.layout.user, null);
holder.animal = (ImageView) convertView.findViewById(R.id.animal);  
holder.cn_word = (TextView) convertView.findViewById(R.id.cn_word);  
holder.en_word = (TextView) convertView.findViewById(R.id.en_word);  
holder.speaker = (ImageView) convertView.findViewById(R.id.speaker);  

convertView.setTag(holder);  
} else {  
holder = (ViewHolder) convertView.getTag();  
}

holder.animal.setImageResource(R.drawable.ic_launcher);
holder.cn_word.setText("xxxxx");
holder.en_word.setText("ssssss");
holder.speaker.setImageResource(R.drawable.speaker);

holder.speaker.setOnClickListener(new OnClickListener(){