Android开发 通过2个按钮来控制一个文本框的背景颜色

java源代码

package com.example.helloactivitydemo;

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

public class MainActivity extends Activity {
private static final String TAG="TestEvent1";
public MainActivity()
{
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final TextView Text=(TextView)findViewById(R.id.text1);
        final Button Button1=(Button)findViewById(R.id.Button1);
        final Button Button2=(Button)findViewById(R.id.Button2);
        Button1.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Text.setBackgroundColor(Color.RED);
            }
        } );
        Button2.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Text.setBackgroundColor(Color.GREEN);
            }
        });    
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}

页面布局

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:id="@+id/LinearLayout1"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical"     tools:context=".MainActivity" >     <!--   <TextView         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/hello_world" /> -->     <TextView android:id="@+id/text1"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_gravity="center"          android:textSize="24sp"          android:text="@string/text1" />           <Button             android:id="@+id/Button2"             android:layout_width="80sp"             android:layout_height="wrap_content"             android:text="@string/green" />           <Button             android:id="@+id/Button1"             android:layout_width="80sp"             android:layout_height="wrap_content"             android:text="@string/red" />   </LinearLayout>