【Android 电量优化】电量优化 ( 唤醒锁定 | 使用 WeakLock 保持服务唤醒 | 屏幕唤醒 )

PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);

powerManager.isWakeLockLevelSupported(PowerManager.PARTIAL_WAKE_LOCK)

mWakeLock.acquire();

mWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WAKE_LOCK");

mWakeLock.acquire();

mWakeLock.release();

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="kim.hsl.bp">
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <!-- WeakLock 保持 CPU 唤醒的 Service 服务 -->
        <service
            android:name=".WeakLockService"
            android:process=":weaklock" />
    </application>
</manifest>

package kim.hsl.bp;
import android.annotation.SuppressLint;
import android.app.Service;
import android.content.Intent;
import android.os.Build;
import android.os.IBinder;
import android.os.PowerManager;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
public class WeakLockService extends Service {
    public static final String TAG = "WeakLockService";
    /**
     * 唤醒锁定 服务
     */
    private PowerManager.WakeLock mWakeLock;
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
    @SuppressLint("InvalidWakeLockTag")
    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    @Override
    public void onCreate() {
        super.onCreate();
        // 跨进程获取 PowerManager 服务
        PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
        // 判断是否支持 CPU 唤醒
        boolean isWakeLockLevelSupported = powerManager.
          isWakeLockLevelSupported(PowerManager.PARTIAL_WAKE_LOCK);
        // 支持 CPU 唤醒 , 才保持唤醒
        if(isWakeLockLevelSupported){
            // 创建只唤醒 CPU 的唤醒锁
            mWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WAKE_LOCK");
            // 开始唤醒 CPU
            mWakeLock.acquire();
        }
    }
    @Override
    public void onDestroy() {
        super.onDestroy();
        // 释放 CPU 唤醒锁
        if(mWakeLock != null){
            mWakeLock.release();
        }
    }
}

package kim.hsl.bp;
import android.os.Bundle;
import android.view.WindowManager;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
    public static final String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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:keepScreenOn="true"
    tools:context=".MainActivity">
</androidx.constraintlayout.widget.ConstraintLayout>