Initial release.

.gitignore

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

MinimalistLauncher/.gitignore

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+/build

MinimalistLauncher/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 27
+    defaultConfig {
+        applicationId "launcher.simple.com.simplelauncher"
+        minSdkVersion 16
+        targetSdkVersion 27
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled true
+            shrinkResources true
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}

MinimalistLauncher/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

MinimalistLauncher/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="launcher.minimalist.com">
+
+    <application
+        android:icon="@android:drawable/ic_menu_sort_by_size"
+        android:label="Minimalist Launcher"
+        android:excludeFromRecents="true"
+        android:theme="@android:style/Theme.Black.NoTitleBar">
+
+        <activity android:name=".MainActivity"
+            android:launchMode="singleTask">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.HOME" />
+            </intent-filter>
+        </activity>
+
+    </application>
+
+</manifest>

MinimalistLauncher/src/main/java/launcher/minimalist/com/MainActivity.java

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+package launcher.minimalist.com;
+
+import android.app.Activity;
+import android.content.ActivityNotFoundException;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.net.Uri;
+import android.os.Bundle;
+import android.provider.Settings;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class MainActivity extends Activity {
+
+    private PackageManager packageManager;
+    private ArrayList<String> packageNames;
+    private ArrayAdapter<String> adapter;
+    private ListView listView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        // Get a list of all the apps installed
+        packageManager = getPackageManager();
+        adapter = new ArrayAdapter<>(
+                this, R.layout.list_item, new ArrayList<String>());
+        packageNames = new ArrayList<>();
+        listView = findViewById(R.id.listView);
+
+        // Tap on an item in the list to launch the app
+        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                try {
+                    startActivity(packageManager.getLaunchIntentForPackage(packageNames.get(position)));
+                } catch (ActivityNotFoundException e) {
+                    fetchAppList(); // application was uninstalled so update the app list
+                }
+            }
+        });
+
+        // Long press on an item in the list to open the app settings
+        listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
+            @Override
+            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
+                try {
+                    // Attempt to launch the app with the package name
+                    Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
+                    intent.setData(Uri.parse("package:" + packageNames.get(position)));
+                    startActivity(intent);
+                } catch (ActivityNotFoundException e) {
+                    fetchAppList();
+                }
+                return false;
+            }
+        });
+        fetchAppList();
+    }
+
+    private void fetchAppList() {
+        adapter.clear(); // Start from a clean adapter when refreshing the list
+
+        // Query the package manager for all apps
+        List<ResolveInfo> activities = packageManager.queryIntentActivities(
+                new Intent(Intent.ACTION_MAIN, null).addCategory(Intent.CATEGORY_LAUNCHER), 0);
+
+        // Sort the applications by alphabetical order and add them to the list
+        Collections.sort(activities, new ResolveInfo.DisplayNameComparator(packageManager));
+        for (ResolveInfo resolver : activities) {
+
+            // Exclude the settings app and this launcher from the list of apps shown
+            String appName = (String) resolver.loadLabel(packageManager);
+            if (appName.equals("Settings") || appName.equals("Minimalist Launcher"))
+                continue;
+
+            adapter.add(appName);
+            packageNames.add(resolver.activityInfo.packageName);
+        }
+        listView.setAdapter(adapter);
+    }
+
+    @Override
+    public void onBackPressed() {
+        // Prevent the back button from closing the activity.
+        fetchAppList();
+    }
+}

MinimalistLauncher/src/main/res/drawable/ic_menu_black_24dp.xml

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+<vector android:height="120dp" android:viewportHeight="24.0"
+    android:viewportWidth="24.0" android:width="120dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M3,18h18v-2L3,16v2zM3,13h18v-2L3,11v2zM3,6v2h18L21,6L3,6z"/>
+</vector>

MinimalistLauncher/src/main/res/drawable/list_item_style.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_pressed="true"
+        android:drawable="@android:color/darker_gray" />
+</selector>

MinimalistLauncher/src/main/res/layout/activity_main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<ListView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:id="@+id/listView"
+    android:scrollbars="none"
+    android:cacheColorHint="@android:color/black"
+    android:padding="24dp"/>

MinimalistLauncher/src/main/res/layout/list_item.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:textColor="@android:color/white"
+    android:padding="16dp"
+    android:background="@drawable/list_item_style"
+    android:textAppearance="?android:attr/textAppearanceLarge"/>

build.gradle

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+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.1.0'
+    }
+}

gradle.properties

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+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx1536m
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true

gradle/wrapper/gradle-wrapper.properties

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+#Sun Apr 08 15:30:18 EDT 2018
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip