长按按钮让EditText中的数字递增

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#长按

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本文介绍了一个Android应用程序中如何处理触摸和长按事件的具体实现方法。详细展示了如何使用onTouch方法识别不同类型的触摸事件，并通过onLongClick方法实现长按操作，包括开启新线程定时更新UI等。

private boolean onTouched = false;
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch (v.getId()) {

            case R.id.iv_plus:
                if (event.getAction() == MotionEvent.ACTION_BUTTON_PRESS ||
                        event.getAction() == MotionEvent.ACTION_DOWN||
                        event.getAction() == MotionEvent.ACTION_HOVER_ENTER||
                        event.getAction() == MotionEvent.ACTION_MASK||
                        event.getAction() == MotionEvent.ACTION_POINTER_DOWN||
                        event.getAction() == MotionEvent.ACTION_MOVE) {
                    onTouched = true;
                    onLongClicked = true;
                } else {
                    onTouched = false;
                    onLongClicked = false;
                }

                break;

            case R.id.iv_minus:
                if (event.getAction() == MotionEvent.ACTION_BUTTON_PRESS ||
                        event.getAction() == MotionEvent.ACTION_DOWN||
                        event.getAction() == MotionEvent.ACTION_HOVER_ENTER||
                        event.getAction() == MotionEvent.ACTION_MASK||
                        event.getAction() == MotionEvent.ACTION_POINTER_DOWN||
                        event.getAction() == MotionEvent.ACTION_MOVE) {
                    onTouched = true;
                    onLongClicked = true;
                } else {
                    onTouched = false;
                    onLongClicked = false;
                }
                break;
        }
        return false;
    }

private boolean onLongClicked = false;
@Override
public boolean onLongClick(View v) {
switch (v.getId()) {
case R.id.iv_plus:
Thread t = new Thread() {
public void run() {
while (onLongClicked) {
try {
Thread.sleep(500);

                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }

                        changePrice1(true);
                        handler.sendEmptyMessage(0x01); //新开启的线程中不能修改UI界面，通过handler与UI线程交互
                    }
                }
            };
            t.start();
            break;
        case R.id.iv_minus:
            Thread t2 = new Thread() {
                public void run() {
                    while (onLongClicked) {
                        try {
                            Thread.sleep(500);

                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }

                        changePrice1(false);
                        handler.sendEmptyMessage(0x01); //新开启的线程中不能修改UI界面，通过handler与UI线程交互

                    }
                }
            };
            t2.start();
            break;

        default:
            break;
    }

// 这里返回true表示不触发onclick事件
return true;
}