图片按钮ImageButton可以把一张图片设为一个按钮,代替Button组件功能,以增加程序美感。 如上图,点击图片按钮后触发OnClickListener事件,在标题栏显示文字 xml:
<?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"
>
<ImageButton android:id="@+id/ib"
android:src="@drawable/bookmark_001"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
程序代码:
package com.pocketdigi;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
public class main extends Activity {
/** Called when the activity is first created. */
ImageButton ib;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ib=(ImageButton)findViewById(R.id.ib);
ib.setOnClickListener(ibLis);
}
private OnClickListener ibLis=new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
setTitle("图片按钮被点了");
}
};
}