“双指轻扫”的姿态？ [英] “Two Finger Swipe” gesture?
本文介绍了“双指轻扫”的姿态？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我要实现我的Android应用两指滑动手势。我用下面的code：
无效handleTouch（MotionEvent米）{
//触及数
INT pointerCount = m.getPointerCount（）;
如果（pointerCount == 2）{
INT行动= m.getActionMasked（）;
INT的actionIndex = m.getActionIndex（）;
串actionString;
TextView的电视=（的TextView）findViewById（R.id.testDiffText）;
开关（动作）
{
案例MotionEvent.ACTION_DOWN：
GLOBAL_TOUCH_POSITION_X =（int）的m.getX（1）;
actionString =DOWN+当前+ GLOBAL_TOUCH_CURRENT_POSITION_X +preV+ GLOBAL_TOUCH_POSITION_X;
tv.setText（actionString）;
打破;
案例MotionEvent.ACTION_UP：
GLOBAL_TOUCH_CURRENT_POSITION_X = 0;
actionString =UP+当前+ GLOBAL_TOUCH_CURRENT_POSITION_X +preV+ GLOBAL_TOUCH_POSITION_X;
tv.setText（actionString）;
打破;
案例MotionEvent.ACTION_MOVE：
GLOBAL_TOUCH_CURRENT_POSITION_X =（int）的m.getX（1）;
INT差异= GLOBAL_TOUCH_POSITION_X，GLOBAL_TOUCH_CURRENT_POSITION_X;
actionString =差别+ DIFF +当前+ GLOBAL_TOUCH_CURRENT_POSITION_X +preV+ GLOBAL_TOUCH_POSITION_X;
tv.setText（actionString）;
打破;
案例MotionEvent.ACTION_POINTER_DOWN：
GLOBAL_TOUCH_POSITION_X =（int）的m.getX（1）;
actionString =DOWN+当前+ GLOBAL_TOUCH_CURRENT_POSITION_X +preV+ GLOBAL_TOUCH_POSITION_X;
tv.setText（actionString）;
打破;
默认：
actionString =;
} pointerCount = 0;
}
其他{
GLOBAL_TOUCH_POSITION_X = 0;
GLOBAL_TOUCH_CURRENT_POSITION_X = 0;
}
}
我得到在向上或向下轻扫执行相同的操作。它仅执行Action_up任务。任何人都可以请帮我实现这两个由上至下滑动和自下而上刷卡。
解决方案
私有静态最终诠释NONE = 0;
私有静态最终诠释SWIPE = 1;
私人INT模式=无;
私人浮动startY;
私人浮动stopY;
//我们将只检测一个滑动如果该差值为至少100个像素
//将此值更改为您的需求
私有静态最终诠释TRESHOLD = 100;公共布尔onTouch（视图V，MotionEvent事件）
{
开关（event.getAction（）及MotionEvent.ACTION_MASK）
{
案例MotionEvent.ACTION_POINTER_DOWN：
//这发生在你触摸屏幕用两个手指
模式= SWIPE;
//也可以使用event.getY（1）或两者的平均
startY = event.getY（0）;
打破; 案例MotionEvent.ACTION_POINTER_UP：
//出现这种情况，当你松开第二根手指
模式=无;
如果（Math.abs（startY - stopY）GT; TRESHOLD）
{
如果（startY＆GT; stopY）
{
//向上滑动
}
其他
{
//向下滑动
}
}
this.mode =无;
打破; 案例MotionEvent.ACTION_MOVE：
如果（==模式SWIPE）
{
stopY = event.getY（0）;
}
打破;
} 返回true;
}
我希望这有助于。
i want to implement two finger swipe gesture in my android app. I have used the following code:
void handleTouch(MotionEvent m){
//Number of touches
int pointerCount = m.getPointerCount();
if(pointerCount == 2){
int action = m.getActionMasked();
int actionIndex = m.getActionIndex();
String actionString;
TextView tv = (TextView) findViewById(R.id.testDiffText);
switch (action)
{
case MotionEvent.ACTION_DOWN:
GLOBAL_TOUCH_POSITION_X = (int) m.getX(1);
actionString = "DOWN"+" current "+GLOBAL_TOUCH_CURRENT_POSITION_X+" prev "+GLOBAL_TOUCH_POSITION_X;
tv.setText(actionString);
break;
case MotionEvent.ACTION_UP:
GLOBAL_TOUCH_CURRENT_POSITION_X = 0;
actionString = "UP"+" current "+GLOBAL_TOUCH_CURRENT_POSITION_X+" prev "+GLOBAL_TOUCH_POSITION_X;
tv.setText(actionString);
break;
case MotionEvent.ACTION_MOVE:
GLOBAL_TOUCH_CURRENT_POSITION_X = (int) m.getX(1);
int diff = GLOBAL_TOUCH_POSITION_X-GLOBAL_TOUCH_CURRENT_POSITION_X;
actionString = "Diff "+diff+" current "+GLOBAL_TOUCH_CURRENT_POSITION_X+" prev "+GLOBAL_TOUCH_POSITION_X;
tv.setText(actionString);
break;
case MotionEvent.ACTION_POINTER_DOWN:
GLOBAL_TOUCH_POSITION_X = (int) m.getX(1);
actionString = "DOWN"+" current "+GLOBAL_TOUCH_CURRENT_POSITION_X+" prev "+GLOBAL_TOUCH_POSITION_X;
tv.setText(actionString);
break;
default:
actionString = "";
}
pointerCount = 0;
}
else {
GLOBAL_TOUCH_POSITION_X = 0;
GLOBAL_TOUCH_CURRENT_POSITION_X = 0;
}
}
I'm getting same action performed in up or down swipe . it perform only Action_up task. can anyone please help me to implement both up to bottom swipe and bottom to up swipe.
解决方案
private static final int NONE = 0;
private static final int SWIPE = 1;
private int mode = NONE;
private float startY;
private float stopY;
// We will only detect a swipe if the difference is at least 100 pixels
// Change this value to your needs
private static final int TRESHOLD = 100;
public boolean onTouch(View v, MotionEvent event)
{
switch (event.getAction() & MotionEvent.ACTION_MASK)
{
case MotionEvent.ACTION_POINTER_DOWN:
// This happens when you touch the screen with two fingers
mode = SWIPE;
// You can also use event.getY(1) or the average of the two
startY = event.getY(0);
break;
case MotionEvent.ACTION_POINTER_UP:
// This happens when you release the second finger
mode = NONE;
if(Math.abs(startY - stopY) > TRESHOLD)
{
if(startY > stopY)
{
// Swipe up
}
else
{
//Swipe down
}
}
this.mode = NONE;
break;
case MotionEvent.ACTION_MOVE:
if(mode == SWIPE)
{
stopY = event.getY(0);
}
break;
}
return true;
}
I hope this helped.
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