android 按钮置灰效果

通过设置可点击  和颜色实现

package com.yqy.yqy_button;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {
	Button btn1,btn2;
	boolean flag = false;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		btn1 = (Button) findViewById(R.id.button1);
		btn1.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				Log.e("YQY", "---");
				
			}
		});
		btn2 = (Button) findViewById(R.id.button2);
		btn2.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				if(flag){
					flag = false;
					btn1.setTextColor(0xFFFFFFFF);
					btn1.setEnabled(true);
				}else{
					flag = true;
	                btn1.setTextColor(0xFFD0EFC6);
					btn1.setEnabled(false);
				}
			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

xml