简述
将自己的视频播放器的屏幕界面平分为左右两部分,其中在屏幕左部分上下滑动改变亮度,在屏幕右部分上下滑动改变声音。
滑动屏幕左边改变亮度滑动右边改变声音
参考博客:http://blog.csdn.net/piaozhiye/article/details/6544450
www.2cto.com/kf/201609/551320.html
在SystemVideoPlayer以及VitamioVideoPlayer的onTouchEvent方法中,根据手指滑动的X轴的值endX进行判断手指滑动在左边还是右边,然后在Y轴上做具体的调节亮度或声音的操作即可,同时当的屏幕达到最亮或最暗(20%)的时候,设备会震动,因此需要添加设备振动的权限。
<uses-permission android:name="android.permission.VIBRATE" />
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private float startY;//手指刚开始滑动时记录点 Y轴
private float startX;//手指刚开始滑动时记录点 X轴
private Vibrator vibrator;//振动
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public boolean onTouchEvent(MotionEvent event) {
detectlor.onTouchEvent(event);//把事件传递给手势识别器
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN://手指按下
//1.按下时记录相关值
startY = event.getY();
startX = event.getX();
mVolume = am.getStreamVolume(AudioManager.STREAM_MUSIC);
touchRang = Math.min(screenWidth, screenHeight);//固定为横屏 则屏幕高度小于屏幕宽度
handler.removeMessages(HIDE_MEDIACONTROLLER);//移除隐藏控制面板的消息
break;
case MotionEvent.ACTION_MOVE://手指滑动
//2.滑动时记录相关值
float endY = event.getY();
float endX = event.getX();
float distanceY = startY - endY;//滑动距离
if (endX < screenWidth/2){
//左边屏幕 调节亮度
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) {
// Log.e(TAG, "up");
setBrightness(20);
}
if (distanceY < FLING_MIN_DISTANCE
&& Math.abs(distanceY) > FLING_MIN_VELOCITY) {
// Log.e(TAG, "down");
setBrightness(-20);
}
}else {
//右边屏幕 调节声音
//改变的音量= (滑动屏幕的距离/屏幕宽度 )* 音量的最大值
float changedVolume = (distanceY / touchRang) * maxVolume;
//最终音量= 原来的音量 + 改变的音量
int volume = (int) Math.min(Math.max(mVolume + changedVolume, 0), maxVolume);
if (changedVolume != 0) {
isMute = false;
updateVolume(volume, isMute);
}
}
break;
case MotionEvent.ACTION_UP://手指离开
handler.sendEmptyMessageDelayed(HIDE_MEDIACONTROLLER, 3000);//延迟3秒发送隐藏控制面板的消息
break;
}
return super.onTouchEvent(event);
}
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/*
*
* 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...
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);
}
// Log.e(TAG, "lp.screenBrightness= " + lp.screenBrightness);
getWindow().setAttributes(lp);
}