Get android running its sandbox in a seprate, isolated service process. So that we support not extracting the native code from the APK, so that we support distributing as an .aab file, so that we may one day release on the app store.

src/android/AndroidManifest.xml

@@ -20,5 +20,10 @@
 				<category android:name="android.intent.category.LAUNCHER"/>
 			</intent-filter>
 		</activity>
+		<service
+			android:name=".TildeFriendsSandboxService"
+			android:exported="false"
+			android:isolatedProcess="true"
+			android:process=":sandbox"/>
 	</application>
 </manifest>

src/android/com/unprompted/tildefriends/TildeFriendsActivity.java

@@ -3,15 +3,18 @@ package com.unprompted.tildefriends;
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.DownloadManager;
+import android.content.ComponentName;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.content.ServiceConnection;
 import android.net.Uri;
 import android.os.Bundle;
-import android.os.CountDownTimer;
 import android.os.Environment;
+import android.os.IBinder;
+import android.os.Parcel;
+import android.os.ParcelFileDescriptor;
+import android.os.RemoteException;
 import android.os.StrictMode;
-import android.os.SystemClock;
-import android.os.strictmode.Violation;
 import android.util.Base64;
 import android.util.Log;
 import android.view.KeyEvent;
@@ -29,19 +32,13 @@ import android.webkit.WebChromeClient;
 import android.webkit.WebResourceRequest;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
-import android.widget.Button;
 import android.widget.TextView;
 import android.widget.Toast;
-import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.FileOutputStream;
-import java.io.OutputStream;
 import java.io.FileReader;
-import java.io.InputStream;
-import java.lang.Process;
-import java.lang.Thread;
+import java.io.OutputStream;
 import java.nio.file.FileSystems;
 import java.nio.file.Paths;
 import java.nio.file.StandardWatchEventKinds;
@@ -51,12 +48,13 @@ import java.nio.file.WatchService;
 import java.util.concurrent.TimeUnit;
 
 public class TildeFriendsActivity extends Activity {
+	static TildeFriendsActivity s_activity;
 	TildeFriendsWebView web_view;
 	String base_url;
 	String port_file_path;
-	Process process;
 	Thread thread;
 	Thread server_thread;
+	ServiceConnection service_connection;
 
 	private ValueCallback<Uri[]> upload_message;
 	private final static int FILECHOOSER_RESULT = 1;
@@ -68,10 +66,12 @@ public class TildeFriendsActivity extends Activity {
 		Log.w("tildefriends", "system.loadLibrary() completed.");
 	}
 
-	static native int tf_server_main(String files_dir, String apk_path, String out_port_file_path);
+	public static native int tf_server_main(String files_dir, String apk_path, String out_port_file_path);
+	public static native int tf_sandbox_main(int pipe_fd);
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
+		s_activity = this;
 		StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
 			.detectLeakedClosableObjects()
 			.penaltyLog()
@@ -274,13 +274,8 @@ public class TildeFriendsActivity extends Activity {
 	@Override
 	protected void onDestroy()
 	{
-		if (process != null) {
-			Log.w("tildefriends", "Killing process.");
-			process.destroyForcibly();
-			Log.w("tildefriends", "Process killed.");
-			process = null;
-		}
 		super.onDestroy();
+		s_activity = null;
 	}
 
 	@Override
@@ -382,4 +377,49 @@ public class TildeFriendsActivity extends Activity {
 		web_view.setVisibility(View.VISIBLE);
 		text_view.setVisibility(View.GONE);
 	}
+
+	public static void start_sandbox(int pipe_fd) {
+		Log.w("tildefriends", "starting service with fd: " + pipe_fd);
+		Intent intent = new Intent(s_activity, TildeFriendsSandboxService.class);
+		s_activity.service_connection = new ServiceConnection() {
+			@Override
+			public void onBindingDied(ComponentName name) {
+				Log.w("tildefriends", "onBindingDied");
+			}
+
+			@Override
+			public void onNullBinding(ComponentName name) {
+				Log.w("tildefriends", "onNullBinding");
+			}
+
+			@Override
+			public void onServiceConnected(ComponentName name, IBinder binder) {
+				Log.w("tildefriends", "onServiceConnected");
+				Parcel data = Parcel.obtain();
+				ParcelFileDescriptor pfd = ParcelFileDescriptor.adoptFd(pipe_fd);
+				data.writeParcelable(pfd, 0);
+				try {
+					binder.transact(TildeFriendsSandboxService.START_CALL,  data, null, IBinder.FLAG_ONEWAY);
+				} catch (RemoteException e) {
+					Log.w("tildefriends", "RemoteException");
+				} finally {
+					data.recycle();
+				}
+			}
+
+			@Override
+			public void onServiceDisconnected(ComponentName name) {
+				Log.w("tildefriends", "onServiceDisconnected");
+			}
+		};
+		s_activity.bindService(intent, s_activity.service_connection, BIND_AUTO_CREATE);
+	}
+
+	public static void stop_sandbox() {
+		Log.w("tildefriends", "stop_sandbox");
+		if (s_activity.service_connection != null) {
+			s_activity.unbindService(s_activity.service_connection);
+			s_activity.service_connection = null;
+		}
+	}
 }

src/android/com/unprompted/tildefriends/TildeFriendsSandboxService.java

@@ -0,0 +1,59 @@
+package com.unprompted.tildefriends;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.Binder;
+import android.os.IBinder;
+import android.os.Parcel;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+public class TildeFriendsSandboxService extends Service {
+	public static final int START_CALL = IBinder.FIRST_CALL_TRANSACTION;
+
+	Thread thread;
+
+	public int onStartCommand(Intent intent, int flags, int start_id) {
+		Log.w("tildefriends", "TildeFriendsSandboxService: onStartCommand");
+		return super.onStartCommand(intent, flags, start_id);
+	}
+
+	public void onDestroy() {
+		Log.w("tildefriends", "TildeFriendsSandboxService: onDestroy");
+		super.onDestroy();
+	}
+
+	private void start_thread(int pipe_fd) {
+		thread = new Thread(new Runnable() {
+			@Override
+			public void run() {
+				Log.w("tildefriends", "Calling tf_sandbox_main.");
+				int result = TildeFriendsActivity.tf_sandbox_main(pipe_fd);
+				Log.w("tildefriends", "tf_sandbox_main returned " + result + ".");
+			}
+		});
+		thread.start();
+	}
+
+	@Override
+	public IBinder onBind(Intent intent) {
+		return new Binder() {
+			@Override
+			protected boolean onTransact(int code, Parcel data, Parcel reply, int flags) {
+				if (code == START_CALL) {
+					ParcelFileDescriptor pfd = data.readParcelable(ParcelFileDescriptor.class.getClassLoader(), ParcelFileDescriptor.class);
+					if (pfd != null) {
+						Log.w("tildefriends", "fd is " + pfd.getFd());
+						start_thread(pfd.detachFd());
+						try {
+							pfd.close();
+						} catch (java.io.IOException e) {
+						}
+					}
+					return true;
+				}
+				return false;
+			}
+		};
+	}
+}

src/android/com/unprompted/tildefriends/TildeFriendsWebView.java

@@ -2,7 +2,6 @@ package com.unprompted.tildefriends;
 
 import android.content.Context;
 import android.util.AttributeSet;
-import android.util.Log;
 
 public class TildeFriendsWebView extends android.webkit.WebView {
 	boolean overscrolledY = false;