android打開關(guān)閉屏幕

打開和關(guān)閉手機(jī)屏幕方法：

1.關(guān)閉屏幕

//設(shè)備管理者

private DevicePolicyManager mDevicePolicyManager;

//關(guān)屏組件

private ComponentName mCompName;

onCreate()

{

mDevicePolicyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);

// 申請權(quán)限

mCompName = new ComponentName(this, YNAdminReceiver.class);

}

//點(diǎn)擊按鈕關(guān)閉屏幕

public void onScreenOff(View view) {

// 判斷該組件是否有系統(tǒng)管理員的權(quán)限

if (!mDevicePolicyManager.isAdminActive(mCompName)) {//這一句一定要有...

Intent intent = new Intent();

//指定動(dòng)作

intent.setAction(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);

//指定給那個(gè)組件授權(quán)

intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mCompName);

startActivity(intent);

} else {

//立即關(guān)閉屏幕

mDevicePolicyManager.lockNow();

//                    devicePolicyManager.resetPassword("123321", 0);

Log.i(TAG, "具有權(quán)限,將進(jìn)行鎖屏....");

Log.i(TAG, "going to shutdown screen");

}

}

其中，組件mCompName是一個(gè)DeviceAdminReceiver:

package com.yn.receivers;

public class YNAdminReceiver extends DeviceAdminReceiver {

}

以上就是關(guān)屏的代碼部分，剩下還需配置：

//res/xml/yndeviceadmin.xml

<?xml version="1.0" encoding="utf-8"?>

<device-admin xmlns:android="http://schemas.android.com/apk/res/android" >

<uses-policies>

<force-lock />

</uses-policies>

</device-admin>

//AndroidMainfest.xml

<!-- 配置權(quán)限 -->

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

<!-- 聲明關(guān)屏組件 -->

<receiver android:name="com.yn.receivers.YNAdminReceiver" >

<meta-data android:name="android.app.device_admin"

<!-- 指定組件配置 -->

android:resource="@xml/yndeviceadmin/>

<intent-filter >

<action android:name="android.app.action.DEVICE_ADMIN_ENABLED"/>

</intent-filter>

</receiver>

通過以上配置，就可以實(shí)現(xiàn)關(guān)屏了。

2.打開屏幕(打開屏幕，只需一個(gè)wakelock即可）

private PowerManager mPowerManager;

private PowerManager.WakeLock mScreenLock;

onCreate()

{

mPowerManager = ((PowerManager) getSystemService(POWER_SERVICE));

mScreenLock = mPowerManager.newWakeLock(

PowerManager.ACQUIRE_CAUSES_WAKEUP //該flag使能屏幕關(guān)閉時(shí)，也能點(diǎn)亮屏幕（通常的wakelock只能維持屏幕處于一直開啟狀態(tài)，如果滅屏?xí)r，是不會(huì)自動(dòng)點(diǎn)亮的）

| PowerManager.SCREEN_DIM_WAKE_LOCK

| PowerManager.ON_AFTER_RELEASE, "screenOnWakeLock");

}

//點(diǎn)擊按鈕，5s后獲取鎖（如果此時(shí)屏幕處于關(guān)閉狀態(tài)，5s后獲取鎖時(shí)，會(huì)點(diǎn)亮屏幕)

public void onScreenOn(View View) {

new Handler().postDelayed(new Runnable() {

@Override

public void run() {

//isHeld()，判斷是否獲取鎖，false未獲取鎖

if (!mScreenLock.isHeld()) {

mScreenLock.acquire();

Toast.makeText(MainActivity.this, "acquire", Toast.LENGTH_SHORT).show();

} else {

mScreenLock.release();

Toast.makeText(MainActivity.this, "release", Toast.LENGTH_SHORT).show();

}

}

}, 5000);

}

最后，還需要在AndroidManifest.xml中配置權(quán)限

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

通過以上步驟，就可以實(shí)現(xiàn)開啟屏幕了。