Android中 视频屏幕左半部分上下滑动改变亮度右半部分上下滑动改变声音
说明:
实现功能:
(1)屏幕右半部分上滑,声音变大,下滑,声音变小 屏幕左半部分上滑,亮度变大,下滑,亮度变小
(2)如果亮度>1或者小于0.2时,手机震动
private float startY;//记录手指按下时的Y坐标 private float startX;//记录手指按下时的Y坐标 private int downVol;//记录手指按下时的音量 private Vibrator vibrator;//手机震动器 //不要忘记震动权限<uses-permission android:name="android.permission.VIBRATE" /> /* * 设置屏幕亮度 lp = 0 全暗 ,lp= -1,根据系统设置, lp = 1; 最亮 */ public void setBrightness(float brightness) { WindowManager.LayoutParams lp = getWindow().getAttributes(); // if (lp.screenBrightness <= 0.1) { // return; // } lp.screenBrightness = lp.screenBrightness + brightness / 255.0f; if (lp.screenBrightness > 1) { lp.screenBrightness = 1; vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); long[] pattern = { 10, 200 }; // OFF/ON/OFF/ON... 关闭10秒震动200毫秒,不停切换 vibrator.vibrate(pattern, -1); } else if (lp.screenBrightness < 0.2) { lp.screenBrightness = (float) 0.2; vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); long[] pattern = { 10, 200 }; // OFF/ON/OFF/ON... vibrator.vibrate(pattern, -1); } getWindow().setAttributes(lp); } @Override public boolean onTouchEvent(MotionEvent event) { //把事件传递给手势识别器(注:对事件只进行了解析处理,没有拦截,解析成手势识别的单击、双击、长按) detector.onTouchEvent(event); switch (event.getAction()) { case MotionEvent.ACTION_DOWN : startY=event.getY(); startX=event.getX(); downVol=audioManager.getStreamVolume(AudioManager.STREAM_MUSIC); handler.removeMessages(HIDE_CONTROL); break; case MotionEvent.ACTION_MOVE : float endY=event.getY(); float distanceY=startY-endY; if(startX>screenWidth/2){ //屏幕右半部分上滑,声音变大,下滑,声音变小 int touchRang=Math.min(screenWidth,screenHeight); //int curvol= (int) (downVol+(distance/screenHeight)*maxVolume); int curvol= (int) (downVol+(distanceY/touchRang)*maxVolume);//考虑到横竖屏切换的问题 int volume=Math.min(Math.max(0,curvol),maxVolume); updateVolume(volume); }else{ //屏幕左半部分上滑,亮度变大,下滑,亮度变小 final double FLING_MIN_DISTANCE = 0.5; final double FLING_MIN_VELOCITY = 0.5; if (distanceY > FLING_MIN_DISTANCE && Math.abs(distanceY) > FLING_MIN_VELOCITY) { setBrightness(20); } if (distanceY < FLING_MIN_DISTANCE && Math.abs(distanceY) > FLING_MIN_VELOCITY) { setBrightness(-20); } } break; case MotionEvent.ACTION_UP : handler.sendEmptyMessageDelayed(HIDE_CONTROL,5000); break; } return super.onTouchEvent(event); }
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