android - MXPlayer 之类的音量控制

Question

我在屏幕右侧有一个 View :

<View
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:layout_weight="1"
    android:id="@+id/right_scroll">
</View>

我已经使用以下方法为其连接了一个滚动事件监听器:

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        AudioManager audioManager = (AudioManager) getApplicationContext().getSystemService(Context.AUDIO_SERVICE);
        Log.d("Gesture ", " onScroll");
        if (e1.getY() < e2.getY()){
            audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI);
        }
        if(e1.getY() > e2.getY()) {
            audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);
        }
        return false;
    }

但这改变音量的方式太快了。有什么办法可以像 MXPlayer 一样减缓这种音量变化吗？

Answer 1

我找到了一种方法。不能完美地工作，但可以完成工作!

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        if (e1.getY() < e2.getY() ){
            volumeUp = 0;
            volumeDown += 1;
            if(volumeDown > 7) {
                Log.i("Increased", "Vol decrease");
                audioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI);
                volumeDown = 0;
            }
        }
        if(e1.getY() > e2.getY()) {
            volumeDown = 0;
            volumeUp += 1;
            if(volumeUp > 7){
                Log.i("Increased", "Vol increase");
                audioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);
                volumeUp = 0;
            }

        }
        return false;
    }