first commit

.github/workflows/android.yml

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+name: Android CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: set up JDK 11
+      uses: actions/setup-java@v3
+      with:
+        java-version: '11'
+        distribution: 'temurin'
+        cache: gradle
+
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+    - name: Build with Gradle
+      run: ./gradlew build
+
+    - name: Set current date as env variable
+      run: |
+        echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_ENV
+    
+    - name: Upload Release
+      uses: softprops/action-gh-release@v1
+      with:
+        tag_name: nightly-tag-${{ env.date }}
+        name: release-${{ env.date }}
+        files: ./app/build/outputs/apk/release/app-release-unsigned.apk
+        draft: false

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+
+.idea/

README.md

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+# AppLauncher
+
+> Minimalist App Launcher for Android Home Screen
+
+![](./screenshot.png)

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-kapt'
+
+android {
+    compileSdkVersion 33
+    defaultConfig {
+        applicationId "org.lsong.launcher"
+        minSdkVersion 33
+        targetSdkVersion 33
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildFeatures {
+        dataBinding true
+        viewBinding true
+
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    namespace 'org.lsong.launcher'
+
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.core:core-ktx:1.2.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.recyclerview:recyclerview:1.1.0'
+}

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" >
+
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.MAIN" />
+            <category android:name="android.intent.category.LAUNCHER" />
+        </intent>
+    </queries>
+
+    <application
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity
+            android:name="org.lsong.launcher.MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.HOME" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/org/lsong/launcher/Adapter.kt

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+package org.lsong.launcher
+
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import org.lsong.launcher.databinding.ItemAppBinding
+
+class Adapter(
+    private var context: Context
+) : RecyclerView.Adapter<Adapter.AppItemViewHolder>() {
+
+    lateinit var appBinding: ItemAppBinding
+    private var appList: List<AppBlock>? = null
+
+    inner class AppItemViewHolder(
+        val appBinding: ItemAppBinding
+    ) : RecyclerView.ViewHolder(appBinding.root)
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AppItemViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+        appBinding = ItemAppBinding.inflate(inflater, parent, false)
+        return AppItemViewHolder(appBinding)
+    }
+
+    override fun getItemCount(): Int {
+        return appList?.size ?: 0
+    }
+
+    override fun onBindViewHolder(holder: AppItemViewHolder, position: Int) {
+        holder.appBinding.appIcon.setImageDrawable(appList?.get(position)?.icon)
+        holder.appBinding.appName.text = appList?.get(position)?.appName
+        holder.appBinding.root.setOnClickListener {
+            context.startActivity(
+                context.packageManager.getLaunchIntentForPackage(
+                    appList?.get(position)?.packageName ?: "org.lsong.launcher"
+                )
+            )
+        }
+    }
+
+    fun passAppList(
+        appsList: List<AppBlock>
+    ) {
+        appList = appsList
+        notifyDataSetChanged()
+    }
+
+}
+

app/src/main/java/org/lsong/launcher/AppBlock.kt

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+package org.lsong.launcher
+
+import android.graphics.drawable.Drawable
+
+data class AppBlock(
+    val appName: String,
+    val icon: Drawable,
+    val packageName: String
+)

app/src/main/java/org/lsong/launcher/MainActivity.kt

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+package org.lsong.launcher
+
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.content.pm.PackageManager.ResolveInfoFlags
+import android.content.pm.ResolveInfo
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.StaggeredGridLayoutManager
+import org.lsong.launcher.databinding.ActivityMainBinding
+
+
+class MainActivity : AppCompatActivity() {
+    private lateinit var mainBinding: ActivityMainBinding
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        mainBinding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(mainBinding.root)
+
+        // getInstalledApps
+        val appList = ArrayList<AppBlock>()
+
+        val intent = Intent(Intent.ACTION_MAIN, null)
+        intent.addCategory(Intent.CATEGORY_LAUNCHER)
+
+        var flags = ResolveInfoFlags.of(PackageManager.MATCH_ALL.toLong())
+        val activities = packageManager.queryIntentActivities(intent, flags)
+        for (resolveInfo in activities) {
+            if (resolveInfo.activityInfo.packageName == this.packageName)
+                continue
+            val app = AppBlock(
+                resolveInfo.loadLabel(packageManager).toString(),
+                resolveInfo.activityInfo.loadIcon(packageManager),
+                resolveInfo.activityInfo.packageName
+            )
+            appList.add(app)
+        }
+        mainBinding.appList.layoutManager =
+            StaggeredGridLayoutManager(1, LinearLayoutManager.VERTICAL)
+        mainBinding.appList.adapter = Adapter(this).also {
+            it.passAppList(appList.sortedWith { o1, o2 ->
+                o1?.appName?.compareTo(o2?.appName ?: "", true) ?: 0
+            })
+        }
+    }
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

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+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>