Initial commit

android/app/build.gradle

@@ -0,0 +1,116 @@
+apply plugin: 'com.android.application'
+android {
+	compileSdkVersion 30
+	buildToolsVersion '30.0.3'
+	ndkVersion "$ndk_version"
+	defaultConfig {
+		applicationId 'net.minetest.minetest'
+		minSdkVersion 16
+		targetSdkVersion 30
+		versionName "${versionMajor}.${versionMinor}.${versionPatch}"
+		versionCode project.versionCode
+	}
+
+	// load properties
+	Properties props = new Properties()
+	def propfile = file('../local.properties')
+	if (propfile.exists())
+		props.load(new FileInputStream(propfile))
+
+	if (props.getProperty('keystore') != null) {
+		signingConfigs {
+			release {
+				storeFile file(props['keystore'])
+				storePassword props['keystore.password']
+				keyAlias props['key']
+				keyPassword props['key.password']
+			}
+		}
+
+		buildTypes {
+			release {
+				minifyEnabled true
+				signingConfig signingConfigs.release
+			}
+		}
+	}
+
+	// for multiple APKs
+	splits {
+		abi {
+			enable true
+			reset()
+			include 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
+		}
+	}
+
+	compileOptions {
+		sourceCompatibility JavaVersion.VERSION_1_8
+		targetCompatibility JavaVersion.VERSION_1_8
+	}
+}
+
+task prepareAssets() {
+	def assetsFolder = "build/assets"
+	def projRoot = "../.."
+	def gameToCopy = "minetest_game"
+
+	copy {
+		from "${projRoot}/minetest.conf.example", "${projRoot}/README.md" into assetsFolder
+	}
+	copy {
+		from "${projRoot}/doc/lgpl-2.1.txt" into "${assetsFolder}"
+	}
+	copy {
+		from "${projRoot}/builtin" into "${assetsFolder}/builtin"
+	}
+	copy {
+		from "${projRoot}/client/shaders" into "${assetsFolder}/client/shaders"
+	}
+	copy {
+		from "../native/deps/armeabi-v7a/Irrlicht/Shaders" into "${assetsFolder}/client/shaders/Irrlicht"
+	}
+	copy {
+		from "${projRoot}/fonts" include "*.ttf" into "${assetsFolder}/fonts"
+	}
+	copy {
+		from "${projRoot}/games/${gameToCopy}" into "${assetsFolder}/games/${gameToCopy}"
+	}
+	fileTree("${projRoot}/po").include("**/*.po").forEach { poFile ->
+		def moPath = "${assetsFolder}/locale/${poFile.parentFile.name}/LC_MESSAGES/"
+		file(moPath).mkdirs()
+		exec {
+			commandLine 'msgfmt', '-o', "${moPath}/minetest.mo", poFile
+		}
+	}
+	copy {
+		from "${projRoot}/textures" into "${assetsFolder}/textures"
+	}
+
+	file("${assetsFolder}/.nomedia").text = "";
+
+	task zipAssets(type: Zip) {
+		archiveName "Minetest.zip"
+		from "${assetsFolder}"
+		destinationDir file("src/main/assets")
+	}
+}
+
+preBuild.dependsOn zipAssets
+
+// Map for the version code that gives each ABI a value.
+import com.android.build.OutputFile
+
+def abiCodes = ['armeabi-v7a': 0, 'arm64-v8a': 1]
+android.applicationVariants.all { variant ->
+	variant.outputs.each {
+		output ->
+			def abiName = output.getFilter(OutputFile.ABI)
+			output.versionCodeOverride = abiCodes.get(abiName, 0) + variant.versionCode
+	}
+}
+
+dependencies {
+	implementation project(':native')
+	implementation 'androidx.appcompat:appcompat:1.3.1'
+}

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,75 @@
+<?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="net.minetest.minetest"
+	android:installLocation="auto">
+
+	<uses-permission android:name="android.permission.INTERNET" />
+	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
+	<!--
+		`android:requestLegacyExternalStorage="true"` is workaround for using `/sdcard`
+		instead of the `getFilesDir()` patch for assets. Check link below for more information:
+		https://developer.android.com/training/data-storage/compatibility
+	-->
+
+	<application
+		android:allowBackup="false"
+		android:icon="@mipmap/ic_launcher"
+		android:label="@string/label"
+		android:requestLegacyExternalStorage="true"
+		android:resizeableActivity="false"
+		tools:ignore="UnusedAttribute">
+
+		<meta-data
+			android:name="android.max_aspect"
+			android:value="3.0" />
+
+		<activity
+			android:name=".MainActivity"
+			android:configChanges="orientation|keyboardHidden|navigation|screenSize"
+			android:maxAspectRatio="3.0"
+			android:screenOrientation="sensorLandscape"
+			android:theme="@style/AppTheme"
+			android:exported="true">
+			<intent-filter>
+				<action android:name="android.intent.action.MAIN" />
+				<category android:name="android.intent.category.LAUNCHER" />
+			</intent-filter>
+		</activity>
+
+		<activity
+			android:name=".GameActivity"
+			android:configChanges="orientation|keyboard|keyboardHidden|navigation|screenSize|smallestScreenSize"
+			android:hardwareAccelerated="true"
+			android:launchMode="singleTask"
+			android:maxAspectRatio="3.0"
+			android:screenOrientation="sensorLandscape"
+			android:theme="@style/AppTheme"
+			android:exported="true">
+			<intent-filter>
+				<action android:name="android.intent.action.MAIN" />
+			</intent-filter>
+			<meta-data
+				android:name="android.app.lib_name"
+				android:value="Minetest" />
+		</activity>
+
+		<service
+			android:name=".UnzipService"
+			android:enabled="true"
+			android:exported="false" />
+
+		<provider
+			android:name="androidx.core.content.FileProvider"
+			android:authorities="net.minetest.minetest.fileprovider"
+			android:grantUriPermissions="true"
+			android:exported="false">
+			<meta-data
+				android:name="android.support.FILE_PROVIDER_PATHS"
+				android:resource="@xml/filepaths" />
+		</provider>
+
+</application>
+
+</manifest>

android/app/src/main/java/net/minetest/minetest/CustomEditText.java

@@ -0,0 +1,45 @@
+/*
+Minetest
+Copyright (C) 2014-2020 MoNTE48, Maksim Gamarnik <MoNTE48@mail.ua>
+Copyright (C) 2014-2020 ubulem,  Bektur Mambetov <berkut87@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+package net.minetest.minetest;
+
+import android.content.Context;
+import android.view.KeyEvent;
+import android.view.inputmethod.InputMethodManager;
+
+import androidx.appcompat.widget.AppCompatEditText;
+
+import java.util.Objects;
+
+public class CustomEditText extends AppCompatEditText {
+	public CustomEditText(Context context) {
+		super(context);
+	}
+
+	@Override
+	public boolean onKeyPreIme(int keyCode, KeyEvent event) {
+		if (keyCode == KeyEvent.KEYCODE_BACK) {
+			InputMethodManager mgr = (InputMethodManager)
+					getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
+			Objects.requireNonNull(mgr).hideSoftInputFromWindow(this.getWindowToken(), 0);
+		}
+		return false;
+	}
+}

android/app/src/main/java/net/minetest/minetest/GameActivity.java

@@ -0,0 +1,207 @@
+/*
+Minetest
+Copyright (C) 2014-2020 MoNTE48, Maksim Gamarnik <MoNTE48@mail.ua>
+Copyright (C) 2014-2020 ubulem,  Bektur Mambetov <berkut87@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+package net.minetest.minetest;
+
+import android.app.NativeActivity;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.text.InputType;
+import android.util.Log;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.WindowManager;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+
+import androidx.annotation.Keep;
+import androidx.appcompat.app.AlertDialog;
+import androidx.core.content.FileProvider;
+
+import java.io.File;
+import java.util.Objects;
+
+// Native code finds these methods by name (see porting_android.cpp).
+// This annotation prevents the minifier/Proguard from mangling them.
+@Keep
+public class GameActivity extends NativeActivity {
+	static {
+		System.loadLibrary("c++_shared");
+		System.loadLibrary("Minetest");
+	}
+
+	private int messageReturnCode = -1;
+	private String messageReturnValue = "";
+
+	public static native void putMessageBoxResult(String text);
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+	}
+
+	private void makeFullScreen() {
+		if (Build.VERSION.SDK_INT >= 19)
+			this.getWindow().getDecorView().setSystemUiVisibility(
+					View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
+					View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+					View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+	}
+
+	@Override
+	public void onWindowFocusChanged(boolean hasFocus) {
+		super.onWindowFocusChanged(hasFocus);
+		if (hasFocus)
+			makeFullScreen();
+	}
+
+	@Override
+	protected void onResume() {
+		super.onResume();
+		makeFullScreen();
+	}
+
+	@Override
+	public void onBackPressed() {
+		// Ignore the back press so Minetest can handle it
+	}
+
+	public void showDialog(String acceptButton, String hint, String current, int editType) {
+		runOnUiThread(() -> showDialogUI(hint, current, editType));
+	}
+
+	private void showDialogUI(String hint, String current, int editType) {
+		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		LinearLayout container = new LinearLayout(this);
+		container.setOrientation(LinearLayout.VERTICAL);
+		builder.setView(container);
+		AlertDialog alertDialog = builder.create();
+		EditText editText;
+		// For multi-line, do not close the dialog after pressing back button
+		if (editType == 1) {
+			editText = new EditText(this);
+		} else {
+			editText = new CustomEditText(this);
+		}
+		container.addView(editText);
+		editText.setMaxLines(8);
+		editText.requestFocus();
+		editText.setHint(hint);
+		editText.setText(current);
+		final InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
+		Objects.requireNonNull(imm).toggleSoftInput(InputMethodManager.SHOW_FORCED,
+				InputMethodManager.HIDE_IMPLICIT_ONLY);
+		if (editType == 1)
+			editText.setInputType(InputType.TYPE_CLASS_TEXT |
+					InputType.TYPE_TEXT_FLAG_MULTI_LINE);
+		else if (editType == 3)
+			editText.setInputType(InputType.TYPE_CLASS_TEXT |
+					InputType.TYPE_TEXT_VARIATION_PASSWORD);
+		else
+			editText.setInputType(InputType.TYPE_CLASS_TEXT);
+		editText.setSelection(editText.getText().length());
+		editText.setOnKeyListener((view, keyCode, event) -> {
+			// For multi-line, do not submit the text after pressing Enter key
+			if (keyCode == KeyEvent.KEYCODE_ENTER && editType != 1) {
+				imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);
+				messageReturnCode = 0;
+				messageReturnValue = editText.getText().toString();
+				alertDialog.dismiss();
+				return true;
+			}
+			return false;
+		});
+		// For multi-line, add Done button since Enter key does not submit text
+		if (editType == 1) {
+			Button doneButton = new Button(this);
+			container.addView(doneButton);
+			doneButton.setText(R.string.ime_dialog_done);
+			doneButton.setOnClickListener((view -> {
+				imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);
+				messageReturnCode = 0;
+				messageReturnValue = editText.getText().toString();
+				alertDialog.dismiss();
+			}));
+		}
+		alertDialog.show();
+		alertDialog.setOnCancelListener(dialog -> {
+			getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
+			messageReturnValue = current;
+			messageReturnCode = -1;
+		});
+	}
+
+	public int getDialogState() {
+		return messageReturnCode;
+	}
+
+	public String getDialogValue() {
+		messageReturnCode = -1;
+		return messageReturnValue;
+	}
+
+	public float getDensity() {
+		return getResources().getDisplayMetrics().density;
+	}
+
+	public int getDisplayHeight() {
+		return getResources().getDisplayMetrics().heightPixels;
+	}
+
+	public int getDisplayWidth() {
+		return getResources().getDisplayMetrics().widthPixels;
+	}
+
+	public void openURI(String uri) {
+		Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
+		startActivity(browserIntent);
+	}
+
+	public String getUserDataPath() {
+		return Utils.getUserDataDirectory(this).getAbsolutePath();
+	}
+
+	public String getCachePath() {
+		return Utils.getCacheDirectory(this).getAbsolutePath();
+	}
+
+	public void shareFile(String path) {
+		File file = new File(path);
+		if (!file.exists()) {
+			Log.e("GameActivity", "File " + file.getAbsolutePath() + " doesn't exist");
+			return;
+		}
+
+		Uri fileUri = FileProvider.getUriForFile(this, "net.minetest.minetest.fileprovider", file);
+
+		Intent intent = new Intent(Intent.ACTION_SEND, fileUri);
+		intent.setDataAndType(fileUri, getContentResolver().getType(fileUri));
+		intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+		intent.putExtra(Intent.EXTRA_STREAM, fileUri);
+
+		Intent shareIntent = Intent.createChooser(intent, null);
+		startActivity(shareIntent);
+	}
+}

android/app/src/main/java/net/minetest/minetest/MainActivity.java

@@ -0,0 +1,185 @@
+/*
+Minetest
+Copyright (C) 2014-2020 MoNTE48, Maksim Gamarnik <MoNTE48@mail.ua>
+Copyright (C) 2014-2020 ubulem,  Bektur Mambetov <berkut87@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+package net.minetest.minetest;
+
+import android.Manifest;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Environment;
+import android.view.View;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.StringRes;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import static net.minetest.minetest.UnzipService.*;
+
+public class MainActivity extends AppCompatActivity {
+	private final static int versionCode = BuildConfig.VERSION_CODE;
+	private final static int PERMISSIONS = 1;
+	private static final String[] REQUIRED_SDK_PERMISSIONS =
+			new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE};
+	private static final String SETTINGS = "MinetestSettings";
+	private static final String TAG_VERSION_CODE = "versionCode";
+
+	private ProgressBar mProgressBar;
+	private TextView mTextView;
+	private SharedPreferences sharedPreferences;
+
+	private final BroadcastReceiver myReceiver = new BroadcastReceiver() {
+		@Override
+		public void onReceive(Context context, Intent intent) {
+			int progress = 0;
+			@StringRes int message = 0;
+			if (intent != null) {
+				progress = intent.getIntExtra(ACTION_PROGRESS, 0);
+				message = intent.getIntExtra(ACTION_PROGRESS_MESSAGE, 0);
+			}
+
+			if (progress == FAILURE) {
+				Toast.makeText(MainActivity.this, intent.getStringExtra(ACTION_FAILURE), Toast.LENGTH_LONG).show();
+				finish();
+			} else if (progress == SUCCESS) {
+				startNative();
+			} else {
+				if (mProgressBar != null) {
+					mProgressBar.setVisibility(View.VISIBLE);
+					if (progress == INDETERMINATE) {
+						mProgressBar.setIndeterminate(true);
+					} else {
+						mProgressBar.setIndeterminate(false);
+						mProgressBar.setProgress(progress);
+					}
+				}
+				mTextView.setVisibility(View.VISIBLE);
+				if (message != 0)
+					mTextView.setText(message);
+			}
+		}
+	};
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_main);
+		IntentFilter filter = new IntentFilter(ACTION_UPDATE);
+		registerReceiver(myReceiver, filter);
+		mProgressBar = findViewById(R.id.progressBar);
+		mTextView = findViewById(R.id.textView);
+		sharedPreferences = getSharedPreferences(SETTINGS, Context.MODE_PRIVATE);
+
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M &&
+				Build.VERSION.SDK_INT < Build.VERSION_CODES.R)
+			checkPermission();
+		else
+			checkAppVersion();
+	}
+
+	private void checkPermission() {
+		final List<String> missingPermissions = new ArrayList<>();
+		for (final String permission : REQUIRED_SDK_PERMISSIONS) {
+			final int result = ContextCompat.checkSelfPermission(this, permission);
+			if (result != PackageManager.PERMISSION_GRANTED)
+				missingPermissions.add(permission);
+		}
+		if (!missingPermissions.isEmpty()) {
+			final String[] permissions = missingPermissions
+					.toArray(new String[0]);
+			ActivityCompat.requestPermissions(this, permissions, PERMISSIONS);
+		} else {
+			final int[] grantResults = new int[REQUIRED_SDK_PERMISSIONS.length];
+			Arrays.fill(grantResults, PackageManager.PERMISSION_GRANTED);
+			onRequestPermissionsResult(PERMISSIONS, REQUIRED_SDK_PERMISSIONS, grantResults);
+		}
+	}
+
+	@Override
+	public void onRequestPermissionsResult(int requestCode,
+									@NonNull String[] permissions, @NonNull int[] grantResults) {
+		if (requestCode == PERMISSIONS) {
+			for (int grantResult : grantResults) {
+				if (grantResult != PackageManager.PERMISSION_GRANTED) {
+					Toast.makeText(this, R.string.not_granted, Toast.LENGTH_LONG).show();
+					finish();
+					return;
+				}
+			}
+			checkAppVersion();
+		}
+	}
+
+	private void checkAppVersion() {
+		if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
+			Toast.makeText(this, R.string.no_external_storage, Toast.LENGTH_LONG).show();
+			finish();
+			return;
+		}
+
+		if (UnzipService.getIsRunning()) {
+			mProgressBar.setVisibility(View.VISIBLE);
+			mProgressBar.setIndeterminate(true);
+			mTextView.setVisibility(View.VISIBLE);
+		} else if (sharedPreferences.getInt(TAG_VERSION_CODE, 0) == versionCode &&
+				Utils.isInstallValid(this)) {
+			startNative();
+		} else {
+			mProgressBar.setVisibility(View.VISIBLE);
+			mProgressBar.setIndeterminate(true);
+			mTextView.setVisibility(View.VISIBLE);
+
+			Intent intent = new Intent(this, UnzipService.class);
+			startService(intent);
+		}
+	}
+
+	private void startNative() {
+		sharedPreferences.edit().putInt(TAG_VERSION_CODE, versionCode).apply();
+		Intent intent = new Intent(this, GameActivity.class);
+		intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK);
+		startActivity(intent);
+	}
+
+	@Override
+	public void onBackPressed() {
+		// Prevent abrupt interruption when copy game files from assets
+	}
+
+	@Override
+	protected void onDestroy() {
+		super.onDestroy();
+		unregisterReceiver(myReceiver);
+	}
+}

android/app/src/main/java/net/minetest/minetest/UnzipService.java

@@ -0,0 +1,259 @@
+/*
+Minetest
+Copyright (C) 2014-2020 MoNTE48, Maksim Gamarnik <MoNTE48@mail.ua>
+Copyright (C) 2014-2020 ubulem,  Bektur Mambetov <berkut87@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+package net.minetest.minetest;
+
+import android.app.IntentService;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.os.Environment;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
+import androidx.annotation.StringRes;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+import java.util.zip.ZipInputStream;
+
+public class UnzipService extends IntentService {
+	public static final String ACTION_UPDATE = "net.minetest.minetest.UPDATE";
+	public static final String ACTION_PROGRESS = "net.minetest.minetest.PROGRESS";
+	public static final String ACTION_PROGRESS_MESSAGE = "net.minetest.minetest.PROGRESS_MESSAGE";
+	public static final String ACTION_FAILURE = "net.minetest.minetest.FAILURE";
+	public static final int SUCCESS = -1;
+	public static final int FAILURE = -2;
+	public static final int INDETERMINATE = -3;
+	private final int id = 1;
+	private NotificationManager mNotifyManager;
+	private boolean isSuccess = true;
+	private String failureMessage;
+
+	private static boolean isRunning = false;
+	public static synchronized boolean getIsRunning() {
+		return isRunning;
+	}
+	private static synchronized void setIsRunning(boolean v) {
+		isRunning = v;
+	}
+
+	public UnzipService() {
+		super("net.minetest.minetest.UnzipService");
+	}
+
+	@Override
+	protected void onHandleIntent(Intent intent) {
+		Notification.Builder notificationBuilder = createNotification();
+		final File zipFile = new File(getCacheDir(), "Minetest.zip");
+		try {
+			setIsRunning(true);
+			File userDataDirectory = Utils.getUserDataDirectory(this);
+			if (userDataDirectory == null) {
+				throw new IOException("Unable to find user data directory");
+			}
+
+			try (InputStream in = this.getAssets().open(zipFile.getName())) {
+				try (OutputStream out = new FileOutputStream(zipFile)) {
+					int readLen;
+					byte[] readBuffer = new byte[16384];
+					while ((readLen = in.read(readBuffer)) != -1) {
+						out.write(readBuffer, 0, readLen);
+					}
+				}
+			}
+
+			migrate(notificationBuilder, userDataDirectory);
+			unzip(notificationBuilder, zipFile, userDataDirectory);
+		} catch (IOException e) {
+			isSuccess = false;
+			failureMessage = e.getLocalizedMessage();
+		} finally {
+			setIsRunning(false);
+			zipFile.delete();
+		}
+	}
+
+	private Notification.Builder createNotification() {
+		String name = "net.minetest.minetest";
+		String channelId = "Minetest channel";
+		String description = "notifications from Minetest";
+		Notification.Builder builder;
+		if (mNotifyManager == null)
+			mNotifyManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+			int importance = NotificationManager.IMPORTANCE_LOW;
+			NotificationChannel mChannel = null;
+			if (mNotifyManager != null)
+				mChannel = mNotifyManager.getNotificationChannel(channelId);
+			if (mChannel == null) {
+				mChannel = new NotificationChannel(channelId, name, importance);
+				mChannel.setDescription(description);
+				// Configure the notification channel, NO SOUND
+				mChannel.setSound(null, null);
+				mChannel.enableLights(false);
+				mChannel.enableVibration(false);
+				mNotifyManager.createNotificationChannel(mChannel);
+			}
+			builder = new Notification.Builder(this, channelId);
+		} else {
+			builder = new Notification.Builder(this);
+		}
+
+		Intent notificationIntent = new Intent(this, MainActivity.class);
+		notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
+			| Intent.FLAG_ACTIVITY_SINGLE_TOP);
+		PendingIntent intent = PendingIntent.getActivity(this, 0,
+			notificationIntent, 0);
+
+		builder.setContentTitle(getString(R.string.notification_title))
+				.setSmallIcon(R.mipmap.ic_launcher)
+				.setContentText(getString(R.string.notification_description))
+				.setContentIntent(intent)
+				.setOngoing(true)
+				.setProgress(0, 0, true);
+
+		mNotifyManager.notify(id, builder.build());
+		return builder;
+	}
+
+	private void unzip(Notification.Builder notificationBuilder, File zipFile, File userDataDirectory) throws IOException {
+		int per = 0;
+
+		int size;
+		try (ZipFile zipSize = new ZipFile(zipFile)) {
+			size = zipSize.size();
+		}
+
+		int readLen;
+		byte[] readBuffer = new byte[16384];
+		try (FileInputStream fileInputStream = new FileInputStream(zipFile);
+		     ZipInputStream zipInputStream = new ZipInputStream(fileInputStream)) {
+			ZipEntry ze;
+			while ((ze = zipInputStream.getNextEntry()) != null) {
+				if (ze.isDirectory()) {
+					++per;
+					Utils.createDirs(userDataDirectory, ze.getName());
+					continue;
+				}
+				publishProgress(notificationBuilder, R.string.loading, 100 * ++per / size);
+				try (OutputStream outputStream = new FileOutputStream(
+						new File(userDataDirectory, ze.getName()))) {
+					while ((readLen = zipInputStream.read(readBuffer)) != -1) {
+						outputStream.write(readBuffer, 0, readLen);
+					}
+				}
+			}
+		}
+	}
+
+	void moveFileOrDir(@NonNull File src, @NonNull File dst) throws IOException {
+		try {
+			Process p = new ProcessBuilder("/system/bin/mv",
+				src.getAbsolutePath(), dst.getAbsolutePath()).start();
+			int exitcode = p.waitFor();
+			if (exitcode != 0)
+				throw new IOException("Move failed with exit code " + exitcode);
+		} catch (InterruptedException e) {
+			throw new IOException("Move operation interrupted");
+		}
+	}
+
+	boolean recursivelyDeleteDirectory(@NonNull File loc) {
+		try {
+			Process p = new ProcessBuilder("/system/bin/rm", "-rf",
+				loc.getAbsolutePath()).start();
+			return p.waitFor() == 0;
+		} catch (IOException | InterruptedException e) {
+			return false;
+		}
+	}
+
+	/**
+	 * Migrates user data from deprecated external storage to app scoped storage
+	 */
+	private void migrate(Notification.Builder notificationBuilder, File newLocation) throws IOException {
+		if (Build.VERSION.SDK_INT >=  Build.VERSION_CODES.R) {
+			return;
+		}
+
+		File oldLocation = new File(Environment.getExternalStorageDirectory(), "Minetest");
+		if (!oldLocation.isDirectory())
+			return;
+
+		publishProgress(notificationBuilder, R.string.migrating, 0);
+		newLocation.mkdir();
+
+		String[] dirs = new String[] { "worlds", "games", "mods", "textures", "client" };
+		for (int i = 0; i < dirs.length; i++) {
+			publishProgress(notificationBuilder, R.string.migrating, 100 * i / dirs.length);
+			File dir = new File(oldLocation, dirs[i]), dir2 = new File(newLocation, dirs[i]);
+			if (dir.isDirectory() && !dir2.isDirectory()) {
+				moveFileOrDir(dir, dir2);
+			}
+		}
+
+		for (String filename : new String[] { "minetest.conf" }) {
+			File file = new File(oldLocation, filename), file2 = new File(newLocation, filename);
+			if (file.isFile() && !file2.isFile()) {
+				moveFileOrDir(file, file2);
+			}
+		}
+
+		recursivelyDeleteDirectory(oldLocation);
+	}
+
+	private void publishProgress(@Nullable  Notification.Builder notificationBuilder, @StringRes int message, int progress) {
+		Intent intentUpdate = new Intent(ACTION_UPDATE);
+		intentUpdate.putExtra(ACTION_PROGRESS, progress);
+		intentUpdate.putExtra(ACTION_PROGRESS_MESSAGE, message);
+		if (!isSuccess)
+			intentUpdate.putExtra(ACTION_FAILURE, failureMessage);
+		sendBroadcast(intentUpdate);
+
+		if (notificationBuilder != null) {
+			notificationBuilder.setContentText(getString(message));
+			if (progress == INDETERMINATE) {
+				notificationBuilder.setProgress(100, 50, true);
+			} else {
+				notificationBuilder.setProgress(100, progress, false);
+			}
+			mNotifyManager.notify(id, notificationBuilder.build());
+		}
+	}
+
+	@Override
+	public void onDestroy() {
+		super.onDestroy();
+		mNotifyManager.cancel(id);
+		publishProgress(null, R.string.loading, isSuccess ? SUCCESS : FAILURE);
+	}
+}

android/app/src/main/java/net/minetest/minetest/Utils.java

@@ -0,0 +1,39 @@
+package net.minetest.minetest;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import java.io.File;
+
+public class Utils {
+	public static @NonNull File createDirs(File root, String dir) {
+		File f = new File(root, dir);
+		if (!f.isDirectory())
+			f.mkdirs();
+
+		return f;
+	}
+
+	public static @Nullable File getUserDataDirectory(Context context) {
+		File extDir = context.getExternalFilesDir(null);
+		if (extDir == null) {
+			return null;
+		}
+
+		return createDirs(extDir, "Minetest");
+	}
+
+	public static @Nullable File getCacheDirectory(Context context) {
+		return context.getCacheDir();
+	}
+
+	public static boolean isInstallValid(Context context) {
+		File userDataDirectory = getUserDataDirectory(context);
+		return userDataDirectory != null && userDataDirectory.isDirectory() &&
+			new File(userDataDirectory, "games").isDirectory() &&
+			new File(userDataDirectory, "builtin").isDirectory() &&
+			new File(userDataDirectory, "client").isDirectory() &&
+			new File(userDataDirectory, "textures").isDirectory();
+	}
+}

android/app/src/main/res/drawable/bg.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
+	android:src="@drawable/background"
+	android:tileMode="repeat" />

android/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,33 @@
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/activity_main"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:background="@drawable/bg">
+
+	<ProgressBar
+		android:id="@+id/progressBar"
+		style="@style/CustomProgressBar"
+		android:layout_width="match_parent"
+		android:layout_height="30dp"
+		android:layout_centerInParent="true"
+		android:layout_marginLeft="90dp"
+		android:layout_marginRight="90dp"
+		android:indeterminate="false"
+		android:max="100"
+		android:visibility="gone"
+		tools:visibility="visible" />
+
+	<TextView
+		android:id="@+id/textView"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_below="@id/progressBar"
+		android:layout_centerInParent="true"
+		android:background="@android:color/transparent"
+		android:text="@string/loading"
+		android:textColor="#FEFEFE"
+		android:visibility="gone"
+		tools:visibility="visible" />
+
+</RelativeLayout>

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+	<string name="label">Minetest</string>
+	<string name="loading">Loading&#8230;</string>
+	<string name="migrating">Migrating save data from old install&#8230; (this may take a while)</string>
+	<string name="not_granted">Required permission wasn\'t granted, Minetest can\'t run without it</string>
+	<string name="notification_title">Loading Minetest</string>
+	<string name="notification_description">Less than 1 minute&#8230;</string>
+	<string name="ime_dialog_done">Done</string>
+	<string name="no_external_storage">External storage isn\'t available. If you use an SDCard, please reinsert it. Otherwise, try restarting your phone or contacting the Minetest developers</string>
+
+</resources>

android/app/src/main/res/values/styles.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools">
+
+	<style name="AppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
+		<item name="windowActionBar">false</item>
+		<item name="android:windowFullscreen">true</item>
+		<item name="android:windowBackground">@drawable/bg</item>
+		<item name="android:windowLayoutInDisplayCutoutMode" tools:targetApi="p">shortEdges</item>
+	</style>
+
+	<style name="CustomProgressBar" parent="Widget.AppCompat.ProgressBar.Horizontal">
+		<item name="android:indeterminateOnly">false</item>
+	</style>
+
+</resources>

android/app/src/main/res/xml/filepaths.xml

@@ -0,0 +1,3 @@
+<paths>
+	<external-files-path path="Minetest/" name="minetest" />
+</paths>