菜鸟之路-Volume、Brightness调节

本人是一个刚刚入行3月的新码农，从Hello World开始的那种，现在已经被分在项目组里做项目，可是由于能力原因只能做些打杂的模块，开始的比较坎坷，还要多谢博客里各位先行者的指引，现在我也要把我的收获写下来，<span style="color:#ff0000;">如果有什么不对或者更完美的方法非常感谢能帮我提出来，在此感激不尽！！！</span>

<span style="color:#ff0000;">   </span>

我做的音量和亮度调节是用简单的用seekbar调节音量和亮度，关键的代码为：

seekbar.setMax(205);

<span style="color:#ff0000;">           </span><span style="background-color: rgb(255, 255, 255);">int currentLight = Settings.System.getInt(getContext()
                .getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, 255);</span>

                       seekbar.setProgress(currentLight - 50);

     为seekbar绑定最大值、获取系统当前亮度，然后将seekbar设置为当前亮度。

                     AudioManager mMgr = (AudioManager) getContext().getSystemService(getContext().AUDIO_SERVICE);

                     int currentMusic = mMgr.getStreamVolume(AudioManager.STREAM_MUSIC);

                     seekbar.setMax(15);

                     seekbar.setProgress(currentMusic);

    原理同上但获取音量需要getSystemService(getContext().AUDIO_SERVICE)来调用系统。

下面上代码

首先是亮度：

                seekbar.setMax(205); int currentLight = Settings.System.getInt(getContext()
.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, 255);
seekbar.setProgress(currentLight - 50);
seekbar
.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
public void onStopTrackingTouch(SeekBar seekBar) {

}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}

@Override
public void onProgressChanged(SeekBar seekBar,
int progress, boolean fromUser) {
int tmpInt = seekBar.getProgress() + 50;
Settings.System.putInt(getContext()
.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS, tmpInt);
tmpInt = Settings.System.getInt(getContext()
.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS, -1);
WindowManager.LayoutParams wl = ((Activity) getContext())
.getWindow().getAttributes();

float tmpFloat = (float) tmpInt / 255;
if (tmpFloat > 0 && tmpFloat <= 1) {
wl.screenBrightness = tmpFloat;
}
((Activity) getContext()).getWindow().setAttributes(wl);
}
});

然后是音量<pre name="code" class="html">final AudioManager mMgr = (AudioManager) getContext().getSystemService(
getContext().AUDIO_SERVICE);
int currentMusic = mMgr.getStreamVolume(AudioManager.STREAM_MUSIC);
seekbar.setMax(15);
seekbar.setProgress(currentMusic);
seekbar
.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar,
int progress, boolean fromUser) {
mMgr.setStreamVolume(AudioManager.STREAM_MUSIC,
progress, 0);

//这里有个特殊，<span style="font-family: Arial, Helvetica, sans-serif;">STREAM_VOICE_CALL指的是电话音量，他和其他音量的最大值不同所以进行一下运算</span>
mMgr.setStreamVolume(AudioManager.STREAM_VOICE_CALL,
（int）（progress*2.5）, 0);
mMgr.setStreamVolume(AudioManager.STREAM_SYSTEM,
progress, 0);
mMgr.setStreamVolume(AudioManager.STREAM_RING,
progress, 0);
mMgr.setStreamVolume(AudioManager.STREAM_ALARM,
progress, 0);
mMgr.setStreamVolume(AudioManager.STREAM_NOTIFICATION,
progress, 0);
mMgr.setStreamVolume(AudioManager.STREAM_DTMF,
progress, 0);
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});

这样就好了~~~