单击和双击android中的按钮 [英] Single click and double click of a button in android

问题描述

在我的应用程序中，我有一个按钮.单击按钮和双击按钮后将执行单独的操作.我怎样才能做到这一点?谢谢

In my application i have a button. After single and double clicking of the button will perform separate operation. How can i do that? Thanks

推荐答案

您可能需要创建一个延迟变量来区分单击和双击.

You may need to create a delay variable which will differenciate between single click and double click.

看到这个代码，

private static final long DOUBLE_PRESS_INTERVAL = 250; // in millis
private long lastPressTime;

private boolean mHasDoubleClicked = false;

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {    

        // Get current time in nano seconds.
        long pressTime = System.currentTimeMillis();


        // If double click...
        if (pressTime - lastPressTime <= DOUBLE_PRESS_INTERVAL) {
            Toast.makeText(getApplicationContext(), "Double Click Event", Toast.LENGTH_SHORT).show();
            mHasDoubleClicked = true;
        }
        else {     // If not double click....
            mHasDoubleClicked = false;
            Handler myHandler = new Handler() {
                 public void handleMessage(Message m) {
                      if (!mHasDoubleClicked) {
                            Toast.makeText(getApplicationContext(), "Single Click Event", Toast.LENGTH_SHORT).show();
                      }
                 }
            };
            Message m = new Message();
            myHandler.sendMessageDelayed(m,DOUBLE_PRESS_INTERVAL);
        }
        // record the last time the menu button was pressed.
        lastPressTime = pressTime;      
        return true;
    }

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