Added in-app instruction activity. After the module is activated, the…

… activity is disabled and the app icon is removed from the app drawer.

app/build.gradle

@@ -14,6 +14,14 @@ android {
         versionName "1.0.1"
     }
 
+    buildFeatures {
+        compose = true
+    }
+
+    composeOptions {
+        kotlinCompilerExtensionVersion "1.3.1"
+    }
+
     buildTypes {
         release {
             minifyEnabled false
@@ -35,6 +43,8 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.5.1'
     implementation 'com.github.kyuubiran:EzXHelper:1.0.1'
     implementation 'com.github.kyuubiran:EzXHelper:1.0.1:sources'
+    implementation 'com.github.mukeshsolanki:MarkdownView-Android:2.0.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
     compileOnly 'de.robv.android.xposed:api:82'
     compileOnly 'de.robv.android.xposed:api:82:sources'
 }

app/src/main/AndroidManifest.xml

@@ -3,8 +3,19 @@
     package="com.berdik.letmedowngrade">
 
     <application
+        android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
-        android:icon="@mipmap/ic_launcher">
+        android:theme="@style/Theme.AppCompat">
+        <activity
+            android:name=".InstructionsActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
         <meta-data
             android:name="xposedmodule"
             android:value="true" />
@@ -18,16 +29,20 @@
             android:name="xposedscope"
             android:resource="@array/xposed_scope" />
 
-        <service android:name="com.berdik.letmedowngrade.QuickTile"
+        <service
+            android:name=".QuickTile"
+            android:exported="true"
             android:icon="@drawable/ic_baseline_arrow_downward_24"
             android:label="@string/tile_label"
-            android:permission="android.permission.BIND_QUICK_SETTINGS_TILE"
-            android:exported="true">
+            android:permission="android.permission.BIND_QUICK_SETTINGS_TILE">
             <intent-filter>
                 <action android:name="android.service.quicksettings.action.QS_TILE" />
             </intent-filter>
-            <meta-data android:name="android.service.quicksettings.TOGGLEABLE_TILE"
+
+            <meta-data
+                android:name="android.service.quicksettings.TOGGLEABLE_TILE"
                 android:value="true" />
         </service>
     </application>
+
 </manifest>

app/src/main/java/com/berdik/letmedowngrade/InstructionsActivity.kt

@@ -0,0 +1,35 @@
+package com.berdik.letmedowngrade
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material.MaterialTheme
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.ComposeView
+import androidx.compose.ui.platform.ViewCompositionStrategy
+import com.mukesh.MarkDown
+import java.io.File
+
+class InstructionsActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_instructions)
+
+        // Create a temporary file copy of the embedded instructions markdown file.
+        val markdownSource: File = File.createTempFile(R.string.app_name.toString(), "tmp")
+        markdownSource.writeBytes(resources.openRawResource(R.raw.setup_instructions).readBytes())
+
+        // Load the temporary file copy of the instructions in the activity.
+        findViewById<ComposeView>(R.id.instructions_md_renderer).apply {
+            setViewCompositionStrategy(ViewCompositionStrategy.DisposeOnViewTreeLifecycleDestroyed)
+            setContent {
+                MaterialTheme {
+                    MarkDown(
+                        file = markdownSource,
+                        modifier = Modifier.fillMaxSize()
+                    )
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/berdik/letmedowngrade/PrefManager.kt

@@ -1,8 +1,10 @@
 package com.berdik.letmedowngrade
 
 import android.annotation.SuppressLint
+import android.content.ComponentName
 import android.content.Context
 import android.content.SharedPreferences
+import android.content.pm.PackageManager
 
 class PrefManager {
     companion object {
@@ -23,6 +25,7 @@ class PrefManager {
                         Context.MODE_WORLD_READABLE
                     )
                     markTileRevealAsDone()
+                    hideModuleIcon(context)
                 }
             } catch (e: SecurityException) {
                 noXposed = true
@@ -56,5 +59,14 @@ class PrefManager {
                 prefEdit.apply()
             }
         }
+
+        private fun hideModuleIcon(context: Context) {
+            if (!noXposed) {
+                context.packageManager.setComponentEnabledSetting(ComponentName(context,
+                    InstructionsActivity::class.java),
+                    PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+                    PackageManager.DONT_KILL_APP)
+            }
+        }
     }
 }

app/src/main/res/layout/activity_instructions.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout 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=".InstructionsActivity">
+
+    <androidx.compose.ui.platform.ComposeView
+        android:id="@+id/instructions_md_renderer"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>