从零开始学android<Button组件的使用.四.>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >


   	?	
<Button 
    android:id="@+id/button"
    android:textColor="#ff00ffff"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:text="我是一个按钮"
    />
</RelativeLayout>

package com.example.helloworld;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {
private  Button button=null;//声明TextView
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	this.button=(Button)super.findViewById(R.id.button);//找到textview
	
	button.setTextSize(30);
	button.setBackgroundColor(Color.parseColor("#F5F5DC"));//设置别经颜色，将其转换为int型数据
	
	
	}

	

}