Android编程实现简单设置按钮颜色的方法

<?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"
  />
  <ImageButton
  android:id="@+id/button"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:background="#000000"
  android:src="@drawable/sy"
  />
</LinearLayout>

package com.YANSE;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageButton;
public class YANSE extends Activity {
  private ImageButton Image =null;
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Image=(ImageButton)findViewById(R.id.button);
  }
}