Add files via upload

app/build.gradle

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+plugins {
+    id 'com.android.application'
+}
+
+android {
+    compileSdk 30
+
+    defaultConfig {
+        applicationId "ru.darkcat09.blockapp"
+        minSdk 16
+        targetSdk 30
+        versionCode 1
+        versionName "1.0"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled true
+            shrinkResources true
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+dependencies {
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="ru.darkcat09.blockapp">
+
+    <application
+        android:allowBackup="true"
+        android:label="@string/android_system_label"
+        android:supportsRtl="true">
+
+        <service
+            android:name=".BlockAppAccessibilityService"
+            android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"
+            android:label="@string/android_system_label"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.accessibilityservice.AccessibilityService" />
+            </intent-filter>
+            <meta-data
+                android:name="android.accessibilityservice"
+                android:resource="@xml/blockapp_service_config" />
+        </service>
+
+    </application>
+
+</manifest>

app/src/main/java/ru/darkcat09/blockapp/BlockAppAccessibilityService.java

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+package ru.darkcat09.blockapp;
+
+import android.accessibilityservice.AccessibilityService;
+import android.accessibilityservice.AccessibilityServiceInfo;
+import android.view.accessibility.AccessibilityEvent;
+import android.widget.Toast;
+
+public class BlockAppAccessibilityService extends AccessibilityService {
+
+    @Override
+    protected void onServiceConnected() {
+        super.onServiceConnected();
+        AccessibilityServiceInfo info = new AccessibilityServiceInfo();
+        info.flags = AccessibilityServiceInfo.DEFAULT;
+        info.eventTypes = AccessibilityEvent.TYPES_ALL_MASK;
+        info.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
+        info.packageNames = new String[] {
+                "com.zhiliaoapp.musically",
+                "com.zhiliaoapp.musically.go",
+                "com.ss.android.ugc.trill"
+        };
+        setServiceInfo(info);
+    }
+
+    @Override
+    public void onAccessibilityEvent(AccessibilityEvent event) {
+        String msg = getString(R.string.message);
+        performGlobalAction(GLOBAL_ACTION_HOME);
+        if (!msg.equals(""))
+            Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
+    }
+
+    @Override
+    public void onInterrupt() {
+        //
+    }
+}

app/src/main/res/values-ru-rRU/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="android_system_label">Система Android</string>
+</resources>

app/src/main/res/values/strings.xml

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+<resources>
+    <string name="android_system_label">Android System</string>
+    <string name="message" translatable="false">Займись чем-нибудь полезным</string>
+</resources>

app/src/main/res/xml/blockapp_service_config.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
+    android:accessibilityFlags="flagDefault"
+    android:accessibilityEventTypes="typeWindowStateChanged|typeWindowsChanged"
+    android:canRetrieveWindowContent="false" />