设置屏幕常亮 switch

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首先要在AndroidManifest中加权限

    
    

import android.os.BatteryStats.Uid.Wakelock;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;

由于 Class是Fragment ，所以用

getActivity()去获取
getActivity().getSystemService









public class DoovTimerFragment extends DeskClockFragment



		mPowerManager = (PowerManager)getActivity().getSystemService(Context.POWER_SERVICE);
		mWakelock= mPowerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, "My Lock");
		
		screenOn=(Switch)v.findViewById(R.id.ScreenOn);
		if(screenOn.isChecked())
		{
			mWakelock.acquire();
		}
		screenOn.setOnCheckedChangeListener(new OnCheckedChangeListener() {
			
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				// TODO Auto-generated method stub
				
				if(screenOn.isChecked())
				{
					mWakelock.acquire();
				}else
				{
					mWakelock.release();
				}
			}
		});