自由手記

屏幕待机时间的读取，不需要任何权限。

float result = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT);
Log.i(TAG, "result = " + result);
屏幕待机时间的设置，需要权限。

Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT, 10*60*1000);

添加权限： 

<uses-permission android:name="android.permission.WRITE_SETTINGS" />

完整的代码： 

try {
float result = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT);
Log.i(TAG, "result = " + result);

Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT, 10*60*1000);

} catch (SettingNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
来自：http://blog.csdn.net/android_ls/article/details/8678618