Android自定义控件——自定义控件双击事件

本文介绍给自定义的控件加统一的双击监听事件，当然也可以对原生控件加

本文通过一个Button来演示

原理很简单，自定义一个接口 DoubleClickListener，定义抽象方法  onDoubleClick(View view)；在touch事件中对 Button做具体的计算，通过两次计算系统时间的毫秒数的差值来判断是否是是双击。

自定义Button：

继承Button，构造方法中初始化clicktime的值，touch事件计算，定义接口和方法，定义给Button设置接口的方法

public class DoubleButton extends Button {

	DoubleClickListener mDoubleClickListener;
	private long mClick_time;

	public DoubleButton(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		init();
	}

	public DoubleButton(Context context, AttributeSet attrs) {
		super(context, attrs);
		init();
	}

	public DoubleButton(Context context) {
		super(context);
		init();
	}

	private void init() {
		mClick_time = System.currentTimeMillis();
		Log.i("ABC", "mClick_time=" + System.currentTimeMillis());
	}
        //<span style="font-family: 'Microsoft YaHei';font-size:14px;">给Button监听接口的方法</span>
	public void setOnDoubleClickListener(
			final DoubleClickListener mDoubleClickListener) {
		this.mDoubleClickListener = mDoubleClickListener;
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		if (event.getAction() == MotionEvent.ACTION_DOWN) {
			long newClickTime = System.currentTimeMillis();
			Log.i("ABC", "newClickTime=" + System.currentTimeMillis());
			Log.i("ABC", "cha=" + (newClickTime - mClick_time));
			if (newClickTime - mClick_time < 1000) {//调用双击事件
				mDoubleClickListener.onDoubleClick(this);

			}
			mClick_time = newClickTime;
		}
		return super.onTouchEvent(event);
	}
        //接口
	interface DoubleClickListener {
		public abstract void onDoubleClick(View view);
	}
}

在界面中使用

Xml中:

<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" >

    <com.example.test.DoubleButton
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="30dp"
        android:layout_marginTop="26dp"
        android:text="Button" />

</RelativeLayout>

Activity中:

public class MainActivity extends ActionBarActivity {

	DoubleButton mButton;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mButton = (DoubleButton) findViewById(R.id.button1);//监听，是不是和onclick一样啊好用啊
		mButton.setOnDoubleClickListener(new DoubleClickListener() {

			@Override
			public void onDoubleClick(View view) {
				// TODO Auto-generated method stub
				Toast.makeText(getBaseContext(), "Down", Toast.LENGTH_SHORT)
						.show();
			}
		});
	}

}

顺便加一个好用的防止连续点击的方法,加在点击事件中就可以用了。麻麻再也不用担心你的按钮被人狂点了

private static boolean isClick() {
		long time = System.currentTimeMillis();
		long timeDur = time - mLastTime;

		if (timeDur > 500) {
			mLastTime = time;
			return true;
		} else {
			return false;
		}

	}