1.在layout下建立一個selector樣式的xml
<selector xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<item
android:drawable="@drawable/toggle_btn_checked"
/>
<item
android:drawable="@drawable/toggle_btn_unchecked"
/>
</selector>
2.在活動的main.xml下添加ImageButton
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imb"
android:layout_below="@+id/radioGroup"
android:layout_centerHorizontal="true"
android:layout_marginTop="100dp"
android:background="@layout/image_btn_press"/>
3,在MainActivity裡面寫
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content_main);
imb = (ImageButton) findViewById(R.id.imb);
imb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (i) {
((ImageButton) v).setImageDrawable(getResources().getDrawable(R.drawable.toggle_btn_unchecked));
i = false;
} else {
((ImageButton) v).setImageDrawable(getResources().getDrawable(R.drawable.toggle_btn_checked));
i = true;
}
}
});
}
或者
(不需要用selector)
1. res / layout / activity_main.xml
<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="com.example.mybackgroundmusic.MainActivity" >
<ImageButton
android:id="@+id/btnC"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:layout_marginLeft="33dp"
android:layout_marginTop="112dp"
/>
</RelativeLayout>
2. MainActivity.class
public class MainActivity extends Activity {
private ImageButton btnC;
private MediaPlayer mp; //背景音樂
boolean is=true;//設定一個ImageButton标志位
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mp=MediaPlayer.create(MainActivity.this, R.raw.jiandanai);
btnC=(ImageButton) findViewById(R.id.btnC);
btnC.setBackgroundResource(R.drawable.deng);//更改按鍵狀态圖示
btnC.setOnClickListener(new ImageButton.OnClickListener(){
@Override
public void onClick(View arg0) {
if(is)
{
btnC.setBackgroundResource(R.drawable.dengliang); //更改按鍵狀态圖示
mp.start();
is=false;
}else{
btnC.setBackgroundResource(R.drawable.deng);
//更改按鍵狀态圖示
mp.pause();
is=true;
}
}
});
}
}