Android札记-事件监听

Android笔记-事件监听

package com.testui;

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

public class TestActivty extends Activity {
    /** Called when the activity is first created. */
	private TextView textView = null;
	private EditText editStr = null;
	private Button btn = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        textView = (TextView)findViewById(R.id.view1);
        editStr = (EditText)findViewById(R.id.textbox1);

        btn = (Button)findViewById(R.id.widget39);
        //添加事件监听的方法
        
        //1.直接调用Button的OnClickListener()方法返回一个OnClickListener对象
//      OnClickListener ocl = new Button.OnClickListener(){
//        public void onClick(View arg0) {
//			textView.setTextColor(Color.MAGENTA);
//		 	textView.setText(editStr.getText().toString());
//		  }
// 		};
        //2.直接创建OnClickListener监听对象，然后调用Button的setOnClickListener(OnClickListener a)
        //  方法设置监听对象
//      OnClickListener ocl = new android.view.View.OnClickListener(){
//    	  public void onClick(View arg0) {
//    		  textView.setTextColor(Color.MAGENTA);
//    		  textView.setText(editStr.getText().toString());
//    	  }
//      };
//		btn.setOnClickListener(ocl);
        btn.setOnClickListener(
        	new OnClickListener(){
	    	  public void onClick(View arg0) {
	    		  textView.setTextColor(Color.MAGENTA);
	    		  textView.setText(editStr.getText().toString());
	    	  }
        	}
        );
    }
}