在PowerManagerService.java中监听用户操作，10秒无操作则打开预置的apk播放视频，直接上代码：

--- a/frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java
+++ b/frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java
@@ -2359,6 +2359,17 @@ public final class PowerManagerService extends SystemService}}+		//用户无操作10s后，通过intent启动循环播放视频的apk
+                if(now-mLastUserActivityTime>=10000 && mBootCompleted && mSystemReady){
+
+                    Intent intent = new Intent();
+                    intent.setClassName("com.example.autoplayvedio","com.example.autoplayvedio.MainActivity");
+                     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                      mContext.startActivity(intent);
+
+                }
+
+if (mUserActivitySummary != USER_ACTIVITY_SCREEN_DREAM && userInactiveOverride) {if ((mUserActivitySummary &(USER_ACTIVITY_SCREEN_BRIGHT | USER_ACTIVITY_SCREEN_DIM)) != 0) {

apk autoplayvideo 的关键代码：

AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"package="com.example.autoplayvedio"><applicationandroid:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:roundIcon="@mipmap/ic_launcher_round"android:supportsRtl="true"android:theme="@style/Theme.AppCompat.DayNight.NoActionBar"><activityandroid:name=".MainActivity"android:screenOrientation="landscape"android:exported="true"><intent-filter><action android:name="android.intent.action.MAIN" /><!-- 系统中不生成apk图标 --><data android:host="LaunchActivity" android:scheme="com.example.autoplayvedio" tools:ignore="AppLinkUrlError"/><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application></manifest>

package com.example.autoplayvedio;import androidx.appcompat.app.AppCompatActivity;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.VideoView;public class MainActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);VideoView video = findViewById(R.id.video);android.widget.MediaController mc = new android.widget.MediaController(MainActivity.this);//本地连接地址//res目录下新建raw目录，视频上传至此处String uri = "android.resource://" + getPackageName() + "/" + R.raw.vedio;video.setVideoURI(Uri.parse(uri));video.setMediaController(mc);mc.setMediaPlayer(video);video.requestFocus();video.start();video.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {@Overridepublic void onPrepared(MediaPlayer mp) {mp.setLooping(true);//让视频循环播放}});//监听到触摸事件后，执行  System.exit(0);video.setOnTouchListener((view, motionEvent) -> {if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {Log.d("guoyh", "Touched the screen");// finish();System.exit(0);}return false;});}}

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><VideoViewandroid:id="@+id/video"android:layout_width="match_parent"android:layout_height="match_parent" /></RelativeLayout>