package cc.ab;

import android.os.Bundle;

import android.provider.Settings;

import android.app.Activity;

/**

* Demo描述:

* 设置设备在睡眠期间始终保持WLAN开启.

*

* 参考资料:

* 1 http://stackoverflow.com/questions/8652031/how-to-modify-wi-fi-sleep-policy-programmatically/8655070#8655070

* 2 http://blog.csdn.net/mrlixirong/article/details/24938637

* Thank you very much

*

* 注意事项:

* 1 这里使用的是android.provider.Settings.System.WIFI_SLEEP_POLICY

* 而不是Settings.System.WIFI_SLEEP_POLICY!!!!!!!!!!!!!!!!!!!!!!!

*

* 2 权限

*

* 3 在实际项目中,这么强制性地设置WIFI在休眠时永不断开有些粗鲁了.

* 可以先记录下WIFI原本的策略,待我们的逻辑完成后再还原回去为好.

*/

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

setWifiNeverSleep();

}

private void setWifiNeverSleep(){

int wifiSleepPolicy=0;

wifiSleepPolicy=Settings.System.getInt(getContentResolver(),

android.provider.Settings.System.WIFI_SLEEP_POLICY,

Settings.System.WIFI_SLEEP_POLICY_DEFAULT);

System.out.println("---> 修改前的Wifi休眠策略值 WIFI_SLEEP_POLICY="+wifiSleepPolicy);

Settings.System.putInt(getContentResolver(),

android.provider.Settings.System.WIFI_SLEEP_POLICY,

Settings.System.WIFI_SLEEP_POLICY_NEVER);

wifiSleepPolicy=Settings.System.getInt(getContentResolver(),

android.provider.Settings.System.WIFI_SLEEP_POLICY,

Settings.System.WIFI_SLEEP_POLICY_DEFAULT);

System.out.println("---> 修改后的Wifi休眠策略值 WIFI_SLEEP_POLICY="+wifiSleepPolicy);

}

}

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

>

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/hello_world" />