Android studio 自动熄灭屏幕的时间控制（自动锁屏）

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• 下面是设置自动锁屏的图片

下面实现通过代码来控制锁屏的时间

• 权限 android.Manifest.permission.WRITE_SETTINGS
• 我这里是动态获取权限的参考
• PERMISSIONS_STORAGE 可以加入其他权限
• 我这里只写了读和写的权限，根据自己需求添加即可
• 例：android.Manifest.permission.需要的权限

 private static String[] PERMISSIONS_STORAGE = {android.Manifest.permission.READ_EXTERNAL_STORAGE,//读取外部存储
            android.Manifest.permission.WRITE_EXTERNAL_STORAGE};//写入外部存储
 private static int REQUEST_PERMISSION_CODE = 3;

• 在onCreate中调用即可

public class MainActivity extends AppCompatActivity {

    private static String[] PERMISSIONS_STORAGE = {android.Manifest.permission.READ_EXTERNAL_STORAGE,//读取外部存储
            android.Manifest.permission.WRITE_EXTERNAL_STORAGE};//写入外部存储
    private static int REQUEST_PERMISSION_CODE = 3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getPermission(this);

    }

    public void getPermission(Activity obj) {
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP) {
            for (int i = 0; i < PERMISSIONS_STORAGE.length; i++) {
                if (ActivityCompat.checkSelfPermission(obj,
                        PERMISSIONS_STORAGE[i]) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(obj, PERMISSIONS_STORAGE, REQUEST_PERMISSION_CODE);
                }
            }
        }
    }

}

注：永不的毫秒值为：2147483647

• 下面两种方法，一个是获取当前休眠的时间，一个是去设置休眠时间

  //获取休眠时间
    private int getScreenOffTime() {
        int screenOffTime = 0;
        try {
                screenOffTime = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT);
        } catch (Exception localException) {
        }
        return screenOffTime;
    }
    //设置休眠时间 （paramInt：毫秒值）
    private void setScreenOffTime(int paramInt) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            //判断是否可以写入数据到系统
            if (!Settings.System.canWrite(this)) {
                Intent i = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
                i.setData(Uri.parse("package:" + this.getPackageName()));
                i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                this.startActivity(i);
            } else {
                Settings.System.putInt(this.getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT, paramInt);
            }
        } else {
            Settings.System.putInt(this.getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT,  paramInt);
        }

    }

整体代码如下

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;

public class MainActivity extends AppCompatActivity {

    private static String[] PERMISSIONS_STORAGE = {android.Manifest.permission.READ_EXTERNAL_STORAGE,//读取外部存储
            android.Manifest.permission.WRITE_EXTERNAL_STORAGE};//写入外部存储
    private static int REQUEST_PERMISSION_CODE = 3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getPermission(this);

    }

    public void getPermission(Activity obj) {
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP) {
            for (int i = 0; i < PERMISSIONS_STORAGE.length; i++) {
                if (ActivityCompat.checkSelfPermission(obj,
                        PERMISSIONS_STORAGE[i]) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(obj, PERMISSIONS_STORAGE, REQUEST_PERMISSION_CODE);
                }
            }
        }
    }
    
    //获取休眠时间
    private int getScreenOffTime() {
        int screenOffTime = 0;
        try {
            screenOffTime = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT);
        } catch (Exception localException) {
        }
        return screenOffTime;
    }
    //设置休眠时间 （paramInt：毫秒值）
    private void setScreenOffTime(int paramInt) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            //判断是否可以写入数据到系统
            if (!Settings.System.canWrite(this)) {
                Intent i = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
                i.setData(Uri.parse("package:" + this.getPackageName()));
                i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                this.startActivity(i);
            } else {
                Settings.System.putInt(this.getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT, paramInt);
            }
        } else {
            Settings.System.putInt(this.getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT,  paramInt);
        }

    }