Android 手勢相關(一)

夏沫琅琊發表於2024-03-29

Android

Android 手勢相關(一)

本篇文章主要記錄下android 手勢相關的一些內容.

Android 提供了一套強大的手勢識別框架,可以用來檢測和處理使用者的手勢操作.

1: 手勢識別

Android 提供了GestureDetector類來識別手勢,透過GestureDetector可以檢測使用者的滑動,長按,雙擊等手勢操作.

2: 手勢監聽器

android 中處理手勢操作,需要我們實現GestureDetector.OnGestureListener介面,或者繼承GestureDetector.SimpleOnGestureListener.

這裡我們分開來講述下這兩種方式.

3: OnGestureListener介面

我們先實現下介面,新增列印日誌:

public class MyGesture implements GestureDetector.OnGestureListener {
    private static final String TAG = "MyGesture";

    @Override
    public boolean onDown(MotionEvent e) {
        Log.i(TAG, "onDown: "+e);
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        Log.i(TAG, "onShowPress: "+e);
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        Log.i(TAG, "onSingleTapUp: "+e);
        return false;
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        Log.i(TAG, "onScroll: " +e1+" "+e2);
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {
        Log.i(TAG, "onLongPress: "+e);
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        Log.i(TAG, "onFling: "+e1 +" "+e2);
        return false;
    }
}

onDown(): 手勢按下 MotionEvent.ACTION_DOWN
onShowPress(): 使用者已經按下,但是還沒有執行移動/向上的移動操作.(這裡我們可以給出高亮顯示,增強顯示效果) MotionEvent.ACTION_DOWN
onSingleTapUp(): 使用者手勢抬起時的動作. MotionEvent.ACTION_UP
onScroll(): 螢幕滑動包括兩個MotionEvent.ACTION_DOWN,MotionEvent.ACTION_MOVE
onLongPress(): 長按 ACTION_DOWN
onFling():迅速滑動

測試:

1: 手勢按下->抬起

onDown->onSingleTapUp

2024-03-27 11:22:18.236 6675-6675/? I/MyGesture: onDown: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=359.5007, y[0]=444.70743, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=175867619, downTime=175867619, deviceId=2, source=0x1002, displayId=0 }

2024-03-27 11:22:18.294 6675-6675/? I/MyGesture: onSingleTapUp: 
    MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=359.5007, y[0]=444.70743, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=175867683, downTime=175867619, deviceId=2, source=0x1002, displayId=0 }

2: 長按不抬起

onDown->onShowPress->onLongPress

2024-03-27 11:24:31.611 6675-6675/? I/MyGesture: onDown: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=550.2358, y[0]=541.6437, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176000997, downTime=176000997, deviceId=2, source=0x1002, displayId=0 }

2024-03-27 11:24:31.706 6675-6675/? I/MyGesture: onShowPress: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=550.2358, y[0]=541.6437, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176000997, downTime=176000997, deviceId=2, source=0x1002, displayId=0 }

2024-03-27 11:24:32.008 6675-6675/? I/MyGesture: onLongPress: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=550.2358, y[0]=541.6437, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176000997, downTime=176000997, deviceId=2, source=0x1002, displayId=0 }

3: 螢幕上來回滑動

onDown->onShowPress->onScroll->onScroll

2024-03-27 11:26:18.190 6675-6675/? I/MyGesture: onDown: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=146.79613, y[0]=707.53455, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176107576, downTime=176107576, deviceId=2, source=0x1002, displayId=0 }

2024-03-27 11:26:18.285 6675-6675/? I/MyGesture: onShowPress: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=146.79613, y[0]=707.53455, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176107576, downTime=176107576, deviceId=2, source=0x1002, displayId=0 }

2024-03-27 11:26:18.345 6675-6675/? I/MyGesture: onScroll: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=146.79613, y[0]=707.53455, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176107576, downTime=176107576, deviceId=2, source=0x1002, displayId=0 } 
    MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=195.22885, y[0]=706.0355, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=2, eventTime=176107730, downTime=176107576, deviceId=2, source=0x1002, displayId=0 }


2024-03-27 11:26:18.361 6675-6675/? I/MyGesture: onScroll: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=146.79613, y[0]=707.53455, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176107576, downTime=176107576, deviceId=2, source=0x1002, displayId=0 } 
    MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=245.15952, y[0]=705.03613, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=2, eventTime=176107747, downTime=176107576, deviceId=2, source=0x1002, displayId=0 }

4: 快速劃過

onDown->onScroll->onScroll->onFling

2024-03-27 11:28:58.135 6675-6675/? I/MyGesture: onDown: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=185.74203, y[0]=596.6075, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176267521, downTime=176267521, deviceId=2, source=0x1002, displayId=0 }
2024-03-27 11:28:58.170 6675-6675/? I/MyGesture: onScroll: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=185.74203, y[0]=596.6075, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176267521, downTime=176267521, deviceId=2, source=0x1002, displayId=0 } 
    MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=361.2865, y[0]=554.5809, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=3, eventTime=176267556, downTime=176267521, deviceId=2, source=0x1002, displayId=0 }
2024-03-27 11:28:58.187 6675-6675/? I/MyGesture: onScroll: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=185.74203, y[0]=596.6075, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176267521, downTime=176267521, deviceId=2, source=0x1002, displayId=0 } 
    MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=519.8522, y[0]=535.2958, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=2, eventTime=176267573, downTime=176267521, deviceId=2, source=0x1002, displayId=0 }
2024-03-27 11:28:58.204 6675-6675/? I/MyGesture: onScroll: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=185.74203, y[0]=596.6075, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176267521, downTime=176267521, deviceId=2, source=0x1002, displayId=0 } 
    MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=681.7713, y[0]=530.18, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=2, eventTime=176267589, downTime=176267521, deviceId=2, source=0x1002, displayId=0 }
2024-03-27 11:28:58.210 6675-6675/? I/MyGesture: onScroll: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=185.74203, y[0]=596.6075, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176267521, downTime=176267521, deviceId=2, source=0x1002, displayId=0 } 
    MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=718.0028, y[0]=530.6509, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176267593, downTime=176267521, deviceId=2, source=0x1002, displayId=0 }
2024-03-27 11:28:58.210 6675-6675/? I/MyGesture: onFling: 
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=185.74203, y[0]=596.6075, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176267521, downTime=176267521, deviceId=2, source=0x1002, displayId=0 } 
    MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=718.0028, y[0]=530.6509, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=176267600, downTime=176267521, deviceId=2, source=0x1002, displayId=0 }

4: SimpleOnGestureListener類

繼承SimpleOnGestureListener,程式碼如下:

public class MyGesture2 extends GestureDetector.SimpleOnGestureListener {
    private static final String TAG = "MyGesture2";
    @Override
    public boolean onDown(MotionEvent e) {
        Log.i(TAG, "onDown:\n"+e);
        return super.onDown(e);
    }

    @Override
    public void onShowPress(MotionEvent e) {
        Log.i(TAG, "onShowPress:\n"+e);
        super.onShowPress(e);
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        Log.i(TAG, "onSingleTapUp:\n"+e);
        return super.onSingleTapUp(e);
    }

    @Override
    public void onLongPress(MotionEvent e) {
        Log.i(TAG, "onLongPress:\n"+e);
        super.onLongPress(e);
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        Log.i(TAG, "onScroll:\n"+e1+"\n"+e2+"\n");
        return super.onScroll(e1, e2, distanceX, distanceY);
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        Log.i(TAG, "onFling:\n"+e1+"\n"+e2+"\n");
        return super.onFling(e1, e2, velocityX, velocityY);
    }

    @Override
    public boolean onDoubleTap(MotionEvent e) {
        Log.i(TAG, "onDoubleTap:\n"+e);
        return super.onDoubleTap(e);
    }

    @Override
    public boolean onDoubleTapEvent(MotionEvent e) {
        Log.i(TAG, "onDoubleTapEvent:\n"+e);
        return super.onDoubleTapEvent(e);
    }

    @Override
    public boolean onContextClick(MotionEvent e) {
        Log.i(TAG, "onContextClick:\n"+e);
        return super.onContextClick(e);
    }

    @Override
    public boolean onSingleTapConfirmed(MotionEvent e) {
        Log.i(TAG, "onSingleTapConfirmed:\n"+e);
        return super.onSingleTapConfirmed(e);
    }

}

SimpleOnGestureListener類實際上繼承了OnGestureListener, OnDoubleTapListener, OnContextClickListener這三個介面.

這裡我們只需要關注OnDoubleTapListener以及OnContextClickListener即可.

onSingleTapConfirmed():使用者在螢幕上進行了單擊操作
onDoubleTap(): 發生雙擊時 , 引數MotionEvent代表的是第一次向下點選的事件
onDoubleTapEvent():雙擊手勢發生時發出的通知, MotionEvent可以是向下,移動,向上.
onContextClick():

測試:

1.手勢按下->抬起

onDown->onSingleTapUp->onSingleTapConfirmed

2024-03-27 11:53:46.537 9897-9897/? I/MyGesture2: onDown:
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=380.4716, y[0]=401.73572, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177755922, downTime=177755922, deviceId=2, source=0x1002, displayId=0 }
2024-03-27 11:53:46.596 9897-9897/? I/MyGesture2: onSingleTapUp:
    MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=380.4716, y[0]=401.73572, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177755985, downTime=177755922, deviceId=2, source=0x1002, displayId=0 }
2024-03-27 11:53:46.837 9897-9897/? I/MyGesture2: onSingleTapConfirmed:
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=380.4716, y[0]=401.73572, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177755922, downTime=177755922, deviceId=2, source=0x1002, displayId=0 }

2: 雙擊

onDown->onSingleTapUp->onDoubleTap(ACTION_DOWN)->onDoubleTapEvent(ACTION_DOWN)

->onDown->onDoubleTapEvent(ACTION_MOVE)->onDoubleTapEvent(ACTION_MOVE)->onDoubleTapEvent(ACTION_UP)

2024-03-24 11:48:03.028 9897-9897/? I/MyGesture2: onDown:
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=387.46185, y[0]=547.6397, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177412412, downTime=177412412, deviceId=2, source=0x1002, displayId=0 }
2024-03-24 11:48:03.071 9897-9897/? I/MyGesture2: onSingleTapUp:
    MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=387.46185, y[0]=547.6397, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177412459, downTime=177412412, deviceId=2, source=0x1002, displayId=0 }
2024-03-24 11:48:03.311 9897-9897/? I/MyGesture2: onDoubleTap:
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=387.46185, y[0]=547.6397, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177412412, downTime=177412412, deviceId=2, source=0x1002, displayId=0 }
2024-03-24 11:48:03.312 9897-9897/? I/MyGesture2: onDoubleTapEvent:
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=384.46603, y[0]=527.6529, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177412698, downTime=177412698, deviceId=2, source=0x1002, displayId=0 }
2024-03-24 11:48:03.313 9897-9897/? I/MyGesture2: onDown:
    MotionEvent { action=ACTION_DOWN, actionButton=0, id[0]=0, x[0]=384.46603, y[0]=527.6529, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177412698, downTime=177412698, deviceId=2, source=0x1002, displayId=0 }
2024-03-24 11:48:03.332 9897-9897/? I/MyGesture2: onDoubleTapEvent:
    MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=384.46603, y[0]=527.6529, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=2, eventTime=177412715, downTime=177412698, deviceId=2, source=0x1002, displayId=0 }
2024-03-24 11:48:03.348 9897-9897/? I/MyGesture2: onDoubleTapEvent:
    MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=384.46603, y[0]=527.6529, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=2, eventTime=177412733, downTime=177412698, deviceId=2, source=0x1002, displayId=0 }
2024-03-24 11:48:03.355 9897-9897/? I/MyGesture2: onDoubleTapEvent:
    MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=384.46603, y[0]=527.6529, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177412738, downTime=177412698, deviceId=2, source=0x1002, displayId=0 }
2024-03-24 11:48:03.356 9897-9897/? I/MyGesture2: onDoubleTapEvent:
    MotionEvent { action=ACTION_UP, actionButton=0, id[0]=0, x[0]=384.46603, y[0]=527.6529, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, classification=NONE, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=177412744, downTime=177412698, deviceId=2, source=0x1002, displayId=0 }

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Android 手勢相關(一)

Android 手勢相關(一)

1: 手勢識別

2: 手勢監聽器

3: OnGestureListener介面

1: 手勢按下->抬起

2: 長按不抬起

3: 螢幕上來回滑動

4: 快速劃過

4: SimpleOnGestureListener類

1.手勢按下->抬起

2: 雙擊

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