android學習案例2——ToggleButton

                                                        (圖片來源慕課網)

Demo效果：

activity_main.xml代碼：

    <ToggleButton
        android:id="@+id/toggle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textOff="關"
        android:textOn="開" />

    <ImageView
        android:id="@+id/iv"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

Java代碼：

public class MainActivity extends ActionBarActivity implements CompoundButton.OnCheckedChangeListener {
    private ToggleButton tb;
    private ImageView iv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tb = (ToggleButton) findViewById(R.id.toggle);
        iv = (ImageView) findViewById(R.id.iv);
        tb.setOnCheckedChangeListener(this);//監聽器
    }
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        iv.setBackgroundColor(isChecked?Color.BLACK:Color.WHITE);//非黑即白
    }
}