android PowerManager亮灭屏（实现篇）

网上查了好多资料 不是讲原理就是讲原理呀！ 你Tm到是实现呀！！！墨迹一大篇文章，都是看的官文档然后加上自己的理解一顿墨迹。

具体讲下我要实现的功能：

Android 6.0实现自动亮灭屏幕，按下电源键屏幕灭屏5s后自动亮屏，时间可以自己设置

用到的知识有 1：powermanger的基础知识  

 2：超级管理员权限  重中之重呀！！！！

参考超级管理员链接点击打开链接

 3：Handler的基础知识

 4：BroadcastReceiver的广播通知的基础知识 

 5：基础知识相信大家找网上一大堆

 6：基础链接我就不给大家发了  相信你们比我找的好

 据说4.0以后为了安全,谷歌兄做了很多安全设施。power电池管理就很难搞了，整了一周费劲巴力的弄了出来

 

废话不多说了直接上代码。 放心代码一定要全部。

首先是MainActivity 的代码

package com.example.unruly_zhao.powermanager_wakelock;import android.app.Activity;import android.app.KeyguardManager;import android.app.KeyguardManager.KeyguardLock;import android.app.admin.DevicePolicyManager;import android.content.BroadcastReceiver;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.graphics.Color;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.os.PowerManager;import android.util.Log;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener {    private Button startBtn = null;    private Button stopBtn = null;    private EditText timeEditText = null;    private EditText delayEditText = null;    private TextView textviewResult = null;    private TextView textviewVersion = null;    /**     * 设备管理     */    public DevicePolicyManager mDPM;    /**     * 次数     */    int time;    /**     * 延迟时间     */    int delay;    /**     * 计数     */    int timeCount;    /**     * 中间数     */    int timemid;    /**     * 组件     */    ComponentName devAdmReceiver;    protected String tag = getClass().getSimpleName();    protected static final int REQUEST_ENABLE = 0;    protected static final int GUI_DOING = 0;    protected static final int GUI_FINISH = 1;    private KeyguardManager km;    private KeyguardLock kl;    private PowerManager pm;    private PowerManager.WakeLock wl;    LockScreen lockScreen = new LockScreen();    int sucCount;    int failCount;    String versionName = "2016_10_14_WakeUp_1.0";    /**     * handler  deal with msg     */    Handler handler = new Handler() {        public void handleMessage(android.os.Message msg) {            switch (msg.what) {                case GUI_DOING:                    Log.e(tag, "doing-->执行");                    String string = (String) msg.obj;                    textviewResult.setText(string);                    textviewResult.setGravity(Gravity.CENTER);                    break;                case GUI_FINISH:                    Log.e(tag, "doing-->完成");                    String string1 = (String) msg.obj;                    textviewResult.setText(string1);                    textviewResult.setGravity(Gravity.CENTER);                    break;                default:                    break;            }        }        ;    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        final IntentFilter filter = new IntentFilter();        filter.addAction(Intent.ACTION_SCREEN_OFF);        filter.addAction(Intent.ACTION_SCREEN_ON);        registerReceiver(mBatInfoReceiver, filter);        Log.e(tag, "wake up oncreate");        init();    }    private final BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver() {        @Override        public void onReceive(final Context context, final Intent intent) {            final String action = intent.getAction();            if(Intent.ACTION_SCREEN_ON.equals(action)){                Log.d("lyj", "-----------------screen is on...");            }else if(Intent.ACTION_SCREEN_OFF.equals(action)){                Log.d("lyj", "----------------- screen is off...");                handler.postDelayed(wakelockRunnable, 1000);            }        }    };    /**     * init初始化     */    private void init() {// TODO Auto-generated method stub        this.startBtn = (Button) findViewById(R.id.button1);        startBtn.setOnClickListener(this);        this.stopBtn = (Button) findViewById(R.id.button2);        stopBtn.setOnClickListener(this);        stopBtn.setEnabled(false);        this.timeEditText = (EditText) findViewById(R.id._time);        timeEditText.setText("1");        timeEditText.setGravity(Gravity.CENTER);        this.delayEditText = (EditText) findViewById(R.id.jiangeshuzi);        delayEditText.setText("3");        delayEditText.setGravity(Gravity.CENTER);        this.textviewResult = (TextView) findViewById(R.id.ttextviewResult);        this.textviewVersion = (TextView) findViewById(R.id.textView2);        textviewVersion.setTextColor(Color.RED);// textviewVersion.setText("2016-9-30_QKLabTestV1.0");        textviewVersion.setText(versionName);        Log.e(tag, "wake up init");    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stub        if (REQUEST_ENABLE == requestCode) {            super.onActivityResult(requestCode, resultCode, data);        }    }    /**     * 唤醒 解锁     */    private void wakeAndUnlock(boolean b) {        if (b) {// 获取电源管理器对象            pm = (PowerManager) getSystemService(Context.POWER_SERVICE);// 获取PowerManager.WakeLock对象，后面的参数|表示同时传入两个值，最后的是调试用的Tag            wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP                    | PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "bright");// 点亮屏幕            wl.acquire();// 得到键盘锁管理器对象            km = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);            kl = km.newKeyguardLock("unLock");// 解锁            kl.disableKeyguard();            sucCount++;        } else {// 锁屏            kl.reenableKeyguard();// 释放wakeLock，关灯            wl.release();// failCount++;        }    }    @Override    public void onClick(View v) {// TODO Auto-generated method stub        switch (v.getId()) {            case R.id.button1:                String timeString = timeEditText.getText().toString();                String delayString = delayEditText.getText().toString();                Log.e(tag, "time-->" + timeString + ",delay--->" + delayString);                sucCount = 0;                failCount = 0;                if (timeString.equals("") || (timeString.length() < 0)) {                    Toast.makeText(MainActivity.this, "请输入正确的次数",                            Toast.LENGTH_SHORT).show();                    return;                } else {                    startBtn.setEnabled(false);                    stopBtn.setEnabled(true);                    time = Integer.parseInt(timeString);                    delay = Integer.parseInt(delayString);                    Log.e(tag, "time-->" + time + ",delay--->" + delay);                    timeCount = time;                    handler.postDelayed(wakelockRunnable, 1000);                }                break;            case R.id.button2:                handler.removeCallbacks(wakelockRunnable);                startBtn.setEnabled(true);                stopBtn.setEnabled(false);                Log.e(tag, "stopbutton点击停止");                break;            default:                break;        }    }    Runnable wakelockRunnable = new Runnable() {        @Override        public void run() {// TODO Auto-generated method stub            ScreenLock();            startBtn.setEnabled(false);            stopBtn.setEnabled(true);            timemid = time - 1;            time = timemid;            if (time > 0) { // 不是执行一次                startBtn.setEnabled(false);                stopBtn.setEnabled(true);                handler.removeCallbacks(wakelockRunnable);                Log.e(tag, "time >0 >>>>执行次数:" + timeCount + ";当前执行:" + timemid + "\n成功次数:" + sucCount + ";失败次数:" + failCount);                String string = "执行次数:" + timeCount + ";当前执行:" + timemid + "\n成功次数:" + sucCount + ";失败次数:" + failCount;                int msgwhat = GUI_DOING;                sendmsg(msgwhat, string);                handler.postDelayed(wakelockRunnable, 2000);            } else {// 一次执行完成                startBtn.setEnabled(true);                stopBtn.setEnabled(false);//send mesg                Log.e(tag, "time <0 >>>>执行次数:" + timeCount + ";当前执行:" + timemid + "\n成功次数:" + sucCount + ";失败次数:" + failCount);                String string = "执行次数:" + timeCount + ";当前执行:" + timemid + "\n成功次数:" + sucCount + ";失败次数:" + failCount;                int msgwhat = GUI_FINISH;                sendmsg(msgwhat, string);                handler.removeCallbacks(wakelockRunnable);            }        }    };    @Override    protected void onDestroy() {// TODO Auto-generated method stub        super.onDestroy();        handler.removeCallbacks(wakelockRunnable);        MainActivity.this.finish();        Log.e(tag, "finish");    }    protected void sendmsg(int meswhat, String string) {// TODO Auto-generated method stub        Message msg = new Message();        msg.what = GUI_FINISH;        msg.obj = string;        handler.sendMessage(msg);        Log.e(tag, "send message");    }    @Override    protected void onPause() {// TODO Auto-generated method stub        super.onPause();    }    @Override    protected void onResume() {// TODO Auto-generated method stub        super.onResume();    }    private void ScreenLock() {// TODO Auto-generated method stub        devAdmReceiver = new ComponentName(MainActivity.this, Darclass.class);        mDPM = (DevicePolicyManager) getSystemService(DEVICE_POLICY_SERVICE);        if (!mDPM.isAdminActive(devAdmReceiver)) {            Intent intent = new Intent(                    DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);            intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,                    devAdmReceiver);            intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,                    "设备管理涉及的管理权限,下面是清单,一次性激活!");            Log.e(tag, "添加设备权限");            startActivityForResult(intent, REQUEST_ENABLE);        } else {            mDPM.lockNow();            long locknow = System.currentTimeMillis();            Log.e(tag, "locknow---syscurrenttime>>>" + locknow);            try {                Thread.sleep(delay * 1000L);                Log.e(tag, " 延迟" + delay + "s后亮屏");            } catch (InterruptedException e) {// TODO Auto-generated catch block                e.printStackTrace();            }            Log.e(tag, "wakeandunlock");            wakeAndUnlock(true);            Log.e(tag, "wakeandunlock---间隔时间>>>"                    + (System.currentTimeMillis() - locknow));        }    }}

首先创建一个空的接收者起名为Darlass 

package com.example.unruly_zhao.powermanager_wakelock;import android.app.admin.DeviceAdminReceiver;import android.app.admin.DevicePolicyManager;import android.content.ComponentName;import android.content.Context;import android.util.Log;/** * Created by Unruly_Zhao on 2017/9/16. */public class Darclass extends DeviceAdminReceiver {    @Override    public DevicePolicyManager getManager(Context context) {        Log.i("XiaoMaGuo", "调用了getManager()方法");        return super.getManager(context);    }    @Override    public ComponentName getWho(Context context) {        Log.i("XiaoMaGuo", "调用了getWho()方法");        return super.getWho(context);    }}

创建一个广播接收器LockScreen

package com.example.unruly_zhao.powermanager_wakelock;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;/** * Created by Unruly_Zhao on 2017/9/16. */public class LockScreen extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {    }}

Layout xml  布局 activity_main

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.unruly_zhao.powermanager_wakelock.MainActivity">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <TextView            android:id="@+id/textView1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="       次数:"            android:textAppearance="?android:attr/textAppearanceMedium" />        <EditText            android:id="@+id/_time"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:ems="10"            android:inputType="number" >            <requestFocus />        </EditText>    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <TextView            android:id="@+id/_jiange"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="       间隔:"            android:textAppearance="?android:attr/textAppearanceMedium" />        <EditText            android:id="@+id/jiangeshuzi"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:ems="10"            android:inputType="number" />    </LinearLayout>    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="match_parent" >        <Button            android:id="@+id/button2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignLeft="@+id/button1"            android:layout_below="@+id/button1"            android:layout_marginTop="30dp"            android:text="      停止      " />        <TextView            android:id="@+id/ttextviewResult"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentLeft="true"            android:layout_alignParentRight="true"            android:layout_alignParentTop="true"            android:layout_marginTop="71dp"            android:textAppearance="?android:attr/textAppearanceMedium" />        <TextView            android:id="@+id/textView2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentBottom="true"            android:layout_alignParentRight="true"            />        <Button            android:id="@+id/button1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="       开始      "            android:layout_centerVertical="true"            android:layout_centerHorizontal="true"/>        <TextView            android:id="@+id/textView3"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentLeft="true"            android:layout_alignParentRight="true"            android:layout_below="@+id/button2"            android:layout_marginTop="14dp"            android:text="使用说明:第一次使用请点击开始,激活设备."            android:textAppearance="?android:attr/textAppearanceMedium" />    </RelativeLayout></LinearLayout>

创建一个xml文件不会的可以查下资料如何创建

在res/xml下新建一个xml文件,填入如下代码（需要什么功能填什么功能,<force-lock />这个是，不用全写）想要深入理解的可以都查查其他的

powermanager.xml 

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

清单文件所加的权限和配置

第二个回报红色 alt+Enter 解决掉它  很多博客都写可能需要第二个  我可以明确告诉你第二个不在绝对实现不了 

他们那个可能版低 ，反正我是没实现

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

最后在清单文件中不要忘记这两个接收器实现下

这是我的名字改成自己的  

 <receiver android:name=".LockScreen"></receiver>        <receiver            android:name=".Darclass"            android:permission="android.permission.BIND_DEVICE_ADMIN">            <meta-data                android:name="android.app.device_admin"                android:resource="@xml/powermanager"/>            <intent-filter>                <action android:name="android.app.action.DEVICE_ADMIN_ENABLED"/>            </intent-filter>        </receiver>