v0.7.5b: added a new android launcher activity which handles missing natives

android/src/main/AndroidManifest.xml

@@ -25,14 +25,18 @@
 		android:backupAgent=".AndroidBackupHandler">
 		<activity
 			android:label="${appName}"
-			android:name=".AndroidGame"
+			android:name=".AndroidLauncher">
-			android:screenOrientation="nosensor"
-			android:configChanges="keyboard|keyboardHidden|orientation">
 			<intent-filter >
 				<action android:name="android.intent.action.MAIN" />
 				<category android:name="android.intent.category.LAUNCHER" />
 			</intent-filter>
 		</activity>
+		<activity
+			android:label="${appName}"
+			android:name=".AndroidGame"
+			android:screenOrientation="nosensor"
+			android:configChanges="keyboard|keyboardHidden|orientation">
+		</activity>
 
 	</application>
 

android/src/main/java/com/shatteredpixel/shatteredpixeldungeon/android/AndroidLauncher.java

@@ -0,0 +1,63 @@
+/*
+ * Pixel Dungeon
+ * Copyright (C) 2012-2015 Oleg Dolya
+ *
+ * Shattered Pixel Dungeon
+ * Copyright (C) 2014-2019 Evan Debenham
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package com.shatteredpixel.shatteredpixeldungeon.android;
+
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.content.Intent;
+import android.graphics.Typeface;
+import android.os.Bundle;
+import android.view.Gravity;
+import android.widget.TextView;
+
+import com.badlogic.gdx.graphics.g2d.freetype.FreeType;
+import com.badlogic.gdx.utils.GdxNativesLoader;
+
+public class AndroidLauncher extends Activity {
+	
+	@SuppressLint("SetTextI18n")
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		
+		try {
+			GdxNativesLoader.load();
+			FreeType.initFreeType();
+			
+			Intent intent = new Intent(this, AndroidGame.class);
+			startActivity(intent);
+			finish();
+		} catch (Exception e){
+			TextView text = new TextView(this);
+			text.setText("Shattered Pixel Dungeon cannot start because some of its code is missing!\n\n" +
+					"This usually happens when the Google Play version of the game is installed from somewhere outside of Google Play.\n\n" +
+					"If you're unsure of how to fix this, please email the developer (Evan@ShatteredPixel.com), and include this error message:\n\n" +
+					e.getMessage());
+			text.setTextSize(16);
+			text.setTextColor(0xFFFFFFFF);
+			text.setTypeface(Typeface.createFromAsset(getAssets(), "pixel_font.ttf"));
+			text.setGravity(Gravity.CENTER_VERTICAL);
+			text.setPadding(10, 10, 10, 10);
+			setContentView(text);
+		}
+	}
+}