Android事件

 1、Java

package com.fish.helloworld;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {

    private TextView m_TextView;
    private backButton_OnClickListener backButtonListener = new backButton_OnClickListener();
    private clearButton_OnClickListener clearButtonListener = new clearButton_OnClickListener();
    
    class backButton_OnClickListener implements OnClickListener{
        public void onClick(View v){
            m_TextView.setText("back");
        }
    }
    
    class clearButton_OnClickListener implements OnClickListener{
        public void onClick(View v){
            m_TextView.setText("clear");
        }
    }
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.skeleton_activity);
        
        m_TextView = (TextView)findViewById(R.id.text1);
        final Button backButton = (Button)findViewById(R.id.back);
        final Button clearButton = (Button)findViewById(R.id.clear);
        
        backButton.setOnClickListener(backButtonListener);
        clearButton.setOnClickListener(clearButtonListener);
    }

}

2、XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/text1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/text1" />
        
    <Button
        android:id="@+id/back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/back" />

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

</LinearLayout>