男生带项链:【转】android?系统设置的权限(背光设置)
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android 系统设置的权限(背光设置)
(2010-01-18 15:28:51)
转载▼ 标签: android
背光
权限
it
分类: android系统 在ANDROID中,系统设置的权限一大堆,让我一直很头痛,今天我以背光调节为例子,来讲解一下相关权限,要调节背光设置,先把设置前光的JAVA源码写上:
初始化:
public void InitBrightness()
{
//相关控件,用SEEKBAR来调节背光
mChangeBtName =(TextView)this.findViewById(R.id.play_bt_change_name);
mChangeBar = (SeekBar)this.findViewById(R.id.bt_set_seekbar);
//mChangeBar.setOnFocusChangeListener(this);
//获取当前背光亮度并在SEEKBAR上呈现
try {
mOldBrightness = Settings.System.getInt(getContentResolver(),Settings.System.SCREEN_BRIGHTNESS);
} catch(SettingNotFoundException snfe) {
mOldBrightness = MAXIMUM_BACKLIGHT;
}
Log.v("Brightness", "number" + mOldBrightness);
mChangeBar.setMax(MAXIMUM_BACKLIGHT - MINIMUM_BACKLIGHT);
Log.v("Brightness max", "setmax:" + (MAXIMUM_BACKLIGHT -MINIMUM_BACKLIGHT));
mChangeBar.setProgress(mOldBrightness - MINIMUM_BACKLIGHT);
mChangeBtName.setText(String.valueOf((mOldBrightness -MINIMUM_BACKLIGHT)/25));
//进度条控制
mChangeBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener(){
public voidonStartTrackingTouch(SeekBar bar) {
}
public voidonProgressChanged(SeekBar bar, int progress,boolean fromtouch){
Log.v("Progress", "num:" + progress);
int step =25;
Settings.System.putInt(getContentResolver(),Settings.System.SCREEN_BRIGHTNESS,progress + MINIMUM_BACKLIGHT);
Log.v("Progress", "putINTOK");
setBrightness(progress + MINIMUM_BACKLIGHT);
mChangeBtName.setText(String.valueOf(progress/step));
}
public voidonStopTrackingTouch(SeekBar bar) {
}
});
}
设置背光函数:
private void setBrightness(int brightness) {
try {
Log.v("Progress", "set brightness");
IHardwareService hardware = IHardwareService.Stub
.asInterface(ServiceManager.getService("hardware"));
if (hardware!= null) {
hardware.setBacklights(brightness);