创建滑块来改变android音量?

时间:2011-09-18 03:03:29

标签: android slider

有人可以给我一个通过滑块改变音量的示例代码吗? 我搜索过,很多教程都要求我创建一个全新的课程。有更简单的方法吗?

谢谢!

3 个答案:

答案 0 :(得分:19)

将此添加到OnCreate,您必须将搜索栏放入布局xml文件中:

    audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
    int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    int curVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
    SeekBar volControl = (SeekBar)findViewById(R.id.volbar);
    volControl.setMax(maxVolume);
    volControl.setProgress(curVolume);
    volControl.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
        @Override
        public void onStopTrackingTouch(SeekBar arg0) {
        }

        @Override
        public void onStartTrackingTouch(SeekBar arg0) {
        }

        @Override
        public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
            audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, arg1, 0);
        }
    });

答案 1 :(得分:1)

新波士顿的特拉维斯在这里有一个很棒的视频教程: http://www.youtube.com/watch?v=8sr2Y6Aff6Y

教程的源代码可以在这里找到:http://www.mybringback.com/bringers/android/thenewboston-android-series/828/thenewboston-sample-projects/

答案 2 :(得分:0)

六年后,这个略有改动的版本适用于Android Studio 3.1。 IDE说我必须声明AudioManager final:

        /* volume slider*/
final AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
int curVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
SeekBar volControl = (SeekBar)findViewById(R.id.volControl);
volControl.setMax(maxVolume);
volControl.setProgress(curVolume);
volControl.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
    @Override
    public void onStopTrackingTouch(SeekBar arg0) {
    }

    @Override
    public void onStartTrackingTouch(SeekBar arg0) {
    }

    @Override
    public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
        audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, arg1, 0);
    }
});

//end Volume slider