Android修改媒体音量以及修改屏幕亮度

铃声：STREAM_RING
闹钟：STREAM_ALARM
系统：STREAM_SYSTEM
通话：STREAM_VOICE_CALL
通知：STREAM_NOTIFICATION
媒体音量：STREAM_MUSIC

// 获取当前媒体音量
public static int getCurrentVolume(Context context){
    if (context == null){
        return -1;
    }
    AudioManager audioManager = (AudioManager)context.getSystemService(context.AUDIO_SERVICE);
    return audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
}

// 获// 获取最大媒体音量
public static int getMaxVolume(Context context){
    if (context == null){
        return -1;
    }
    AudioManager audioManager = (AudioManager)context.getSystemService(context.AUDIO_SERVICE);
    return audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
}

// 设置媒体音量
public static void setVolume(Context context){
    if (context == null){
        return;
    }
    AudioManager audioManager = (AudioManager)context.getSystemService(context.AUDIO_SERVICE);
    int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    /**
     * setStreamVolume
     *      streamType：音量类型
     *      index：需设置的音量值
     *      flags：附加参数：
     *              AudioManager.FLAG_SHOW_VIBRATE_HINT：震动提示
     *              AudioManager.FLAG_SHOW_SILENT_HINT：静音提示
     *              AudioManager.FLAG_PLAY_SOUND：调整音量时播放声音
     *              AudioManager.FLAG_SHOW_UI：调整音量时显示系统音量进度条；0则不显示
     */
    audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,((int)maxVolume / 2 + 1),0);
}

// 获取当前屏幕亮度
public static int getCurrentScreenBrightness(Context context) throws Settings.SettingNotFoundException {
    if (context == null){
        return -1;
    }
    return Settings.System.getInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS);
}

// 获取系统亮度模式(自动亮度：1  手动亮度：0)
public static int getBrightnessMode(Context context) throws Settings.SettingNotFoundException {
    if (context == null){
        return -1;
    }
    return Settings.System.getInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE);
}

// 获取最大屏幕亮度
public static int getMaxScreenBrightness(Context context) throws Settings.SettingNotFoundException {
    if (context == null){
        return -1;
    }
    int brightnessSettingMaximumId = context.getResources().getIdentifier("config_screenBrightnessSettingMaximum", "integer", "android");
    return context.getResources().getInteger(brightnessSettingMaximumId);
}

<!-- 修改系统屏幕亮度 -->
<uses-permission android:name="android.permission.WRITE_SETTINGS" tools:ignore="ProtectedPermissions" /> 

package cn.com.lttc.loginui;

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.view.View;
import android.widget.Toast;

import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;

import cn.com.lttc.loginui.util.SystemServiceUtil;

public class TextActivity extends AppCompatActivity {

    public static final int REQUEST_CODE = 100;

    @RequiresApi(api = Build.VERSION_CODES.M)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_register_step_one);

        setScreenBrightness();
    }

    // 设置屏幕亮度
    @RequiresApi(api = Build.VERSION_CODES.M)
    public void setScreenBrightness(){
        if (Settings.System.canWrite(this)){
            Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, 0);//设置手动亮度
            int brightnessSettingMaximumId = getResources().getIdentifier("config_screenBrightnessSettingMaximum", "integer", "android");
            int brightnessSettingMaximum = getResources().getInteger(brightnessSettingMaximumId);//获取系统亮度最大值
            Settings.System.putInt(getContentResolver(),Settings.System.SCREEN_BRIGHTNESS, brightnessSettingMaximum);//修改系统的亮度
        }else {
            // 进入设置页面手动添加权限
            Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse("package:" + getPackageName()));
            startActivityForResult(intent,REQUEST_CODE);
        }
    }

    @RequiresApi(api = Build.VERSION_CODES.M)
    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_CODE) {
            if (Settings.System.canWrite(this)) {
                setScreenBrightness();
            } else {
                Toast.makeText(this, "拒绝了权限", Toast.LENGTH_SHORT).show();
            }
        }
    }

}

package cn.com.lttc.loginui.util;

import android.content.Context;
import android.media.AudioManager;
import android.os.Build;
import android.provider.Settings;
import androidx.annotation.RequiresApi;

public class SystemServiceUtil {

    // 获取当前媒体音量
    public static int getCurrentVolume(Context context){
        if (context == null){
            return -1;
        }
        AudioManager audioManager = (AudioManager)context.getSystemService(context.AUDIO_SERVICE);//获取音频管理器
        return audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
    }

    // 获取最大媒体音量
    public static int getMaxVolume(Context context){
        if (context == null){
            return -1;
        }
        AudioManager audioManager = (AudioManager)context.getSystemService(context.AUDIO_SERVICE);
        return audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    }

    // 设置媒体音量
    public static void setVolume(Context context){
        if (context == null){
            return;
        }
        AudioManager audioManager = (AudioManager)context.getSystemService(context.AUDIO_SERVICE);
        int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
        /**
         * setStreamVolume
         *      streamType：音量类型
         *      index：需设置的音量值
         *      flags：附加参数：
         *              AudioManager.FLAG_SHOW_VIBRATE_HINT：震动提示
         *              AudioManager.FLAG_SHOW_SILENT_HINT：静音提示
         *              AudioManager.FLAG_PLAY_SOUND：调整音量时播放声音
         *              AudioManager.FLAG_SHOW_UI：调整音量时显示系统音量进度条；0则不显示
         */
        audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,((int)maxVolume / 2 + 1),0);
    }

    // 获取当前屏幕亮度
    public static int getCurrentScreenBrightness(Context context) throws Settings.SettingNotFoundException {
        if (context == null){
            return -1;
        }
        return Settings.System.getInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS);
    }

    // 获取系统亮度模式(自动亮度：1  手动亮度：0)
    public static int getBrightnessMode(Context context) throws Settings.SettingNotFoundException {
        if (context == null){
            return -1;
        }
        return Settings.System.getInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE);
    }

    // 获取最大屏幕亮度
    public static int getMaxScreenBrightness(Context context) throws Settings.SettingNotFoundException {
        if (context == null){
            return -1;
        }
        int brightnessSettingMaximumId = context.getResources().getIdentifier("config_screenBrightnessSettingMaximum", "integer", "android");
        return context.getResources().getInteger(brightnessSettingMaximumId);
    }

    // 设置屏幕亮度
    @RequiresApi(api = Build.VERSION_CODES.M)
    public static void setScreenBrightness(Context context){
        if (Settings.System.canWrite(context)){
            Settings.System.putInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, 0);//设置手动亮度
            int brightnessSettingMaximumId = context.getResources().getIdentifier("config_screenBrightnessSettingMaximum", "integer", "android");
            int brightnessSettingMaximum = context.getResources().getInteger(brightnessSettingMaximumId);//获取系统亮度最大值
            Settings.System.putInt(context.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS, brightnessSettingMaximum);//修改系统的亮度
        }
    }

}