Android简单的Button事件处理

res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    android:id="@+id/tvText"/>
<Button 
	android:layout_height="wrap_content" 
	android:layout_width="wrap_content" 
	android:text="Button" 
	android:id="@+id/mBtn">
	</Button>
</LinearLayout>

src/EX03_07.java

package gphone.ex03_07;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class EX03_07 extends Activity {
    /** Called when the activity is first created. */
	TextView tvText=null;
	Button mBtn=null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        tvText=(TextView)this.findViewById(R.id.tvText);
        mBtn=(Button)this.findViewById(R.id.mBtn);
        
        mBtn.setOnClickListener(new OnClickListener(){

			public void onClick(View v) {
				// TODO Auto-generated method stub
				tvText.setText("Hi,Every Body!!!!");
			}});

    }
}

运行结果