android: disable import/export home when SAF is disabled. Code clean up

Disable import/export home folder buttons when not using SAF file
picker.
Get rid of unused home migration feature when onboarding.
Android TV screenshots and banner.

core/ui/gui.cpp

@@ -1768,11 +1768,14 @@ static void gui_settings_general()
         ImGui::Text("%s", s.c_str());
         ImguiStyleVar _(ImGuiStyleVar_FramePadding, ScaledVec2(24, 3));
 #ifdef __ANDROID__
-        if (ImGui::Button("Import"))
-        	hostfs::importHomeDirectory();
-        ImGui::SameLine();
-        if (ImGui::Button("Export"))
-        	hostfs::exportHomeDirectory();
+        {
+        	DisabledScope _(!config::UseSafFilePicker);
+			if (ImGui::Button("Import"))
+				hostfs::importHomeDirectory();
+			ImGui::SameLine();
+			if (ImGui::Button("Export"))
+				hostfs::exportHomeDirectory();
+        }
 #endif
 #ifdef TARGET_MAC
         if (ImGui::Button("Reveal in Finder"))

shell/android-studio/flycast/src/main/java/com/flycast/emulator/BaseGLActivity.java

@@ -3,7 +3,6 @@
 import android.Manifest;
 import android.app.Activity;
 import android.app.AlertDialog;
-import android.app.ProgressDialog;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -35,9 +34,6 @@
 import com.flycast.emulator.periph.SipEmulator;
 
 import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
@@ -96,19 +92,13 @@ protected void onCreate(@Nullable Bundle savedInstanceState) {
         new HttpClient().nativeInit();
 
         String homeDir = prefs.getString(Config.pref_home, "");
-        // Check that home dir is valid, migrate if needed
-        String newHome = checkHomeDirectory(homeDir);
-        if (newHome != null) {
-            if (!newHome.equals(homeDir))
-                prefs.edit().putString(Config.pref_home, newHome).apply();
-            finishCreation();
+        // Check that home dir is valid
+        if (homeDir.isEmpty()) {
+            // home dir not set: use default
+            homeDir = getDefaultHomeDir();
+            prefs.edit().putString(Config.pref_home, homeDir).apply();
         }
-        Log.i("flycast", "BaseGLActivity.onCreate done");
-    }
 
-    protected void finishCreation()
-    {
-        String homeDir = prefs.getString(Config.pref_home, getDefaultHomeDir());
         String result = JNIdc.initEnvironment((Emulator)getApplicationContext(), getFilesDir().getAbsolutePath(), homeDir,
                 Locale.getDefault().toString());
         if (result != null) {
@@ -178,7 +168,7 @@ public void onClick(DialogInterface dialog,int id) {
                     pendingIntentUrl = gameUri.toString();
             }
         }
-        Log.i("flycast", "BaseGLActivity.finishCreation done");
+        Log.i("flycast", "BaseGLActivity.onCreate done");
     }
 
     private void setStorageDirectories()
@@ -430,132 +420,6 @@ private String getDefaultHomeDir() {
         return dir.getAbsolutePath();
     }
 
-    private String checkHomeDirectory(String homeDir)
-    {
-        if (homeDir.isEmpty())
-            // home dir not set: use default
-            return getDefaultHomeDir();
-        // must account for the fact that homeDir may be on internal storage but external storage is now available
-        if (homeDir.startsWith(getDefaultHomeDir()) || homeDir.startsWith(getFilesDir().getAbsolutePath()))
-            // home dir is ok
-            return homeDir;
-        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.P)
-            // no need to migrate on Android 9 or earlier
-            return homeDir;
-        // migration disabled for now
-        return homeDir;
-        /*
-        // Only ask to migrate once
-        String migrationPref = "legacy-storage-migration-done";
-        if (prefs.getBoolean(migrationPref, false))
-            return homeDir;
-        // Ask the user if he wants to migrate
-        AlertDialog.Builder dlgAlert  = new AlertDialog.Builder(this);
-        dlgAlert.setMessage("The current Flycast home folder will be inaccessible in future versions.\n\n"
-                + "Do you want to move config and save files to a valid location?");
-        dlgAlert.setTitle("Migrate Home");
-        dlgAlert.setPositiveButton("Yes",
-                (dialog, id) -> BaseGLActivity.this.migrateHome(homeDir));
-        dlgAlert.setNegativeButton("No",
-                (dialog, id) -> BaseGLActivity.this.finishCreation());
-        dlgAlert.setIcon(android.R.drawable.ic_dialog_alert);
-        dlgAlert.setCancelable(false);
-        dlgAlert.create().show();
-        // Don't ask again
-        prefs.edit().putBoolean(migrationPref, true).apply();
-
-        return null;
-         */
-    }
-
-    private boolean migrationThreadCancelled = false;
-    private void migrateHome(String oldHome)
-    {
-        File source = new File(oldHome);
-        File dest = new File(getDefaultHomeDir());
-        ProgressDialog progress = ProgressDialog.show(this, "Migrating", "Moving files to their new home",
-                true, true, dialogInterface -> migrationThreadCancelled = true);
-        progress.show();
-
-        migrationThreadCancelled = false;
-        Thread thread = new Thread(new Runnable() {
-            private void moveFile(File file, File toDir)
-            {
-                //Log.d("flycast", "Moving " + file.getAbsolutePath() + " to " + toDir.getAbsolutePath());
-                try {
-                    File dest = new File(toDir, file.getName());
-                    // file.renameTo(dest) doesn't seem to work
-                    FileInputStream in = new FileInputStream(file);
-                    FileOutputStream out = new FileOutputStream(dest);
-                    byte[] buf = new byte[8192];
-                    while (true) {
-                        int len = in.read(buf);
-                        if (len == -1)
-                            break;
-                        out.write(buf, 0, len);
-                    }
-                    out.close();
-                    in.close();
-                    file.delete();
-                } catch (IOException e) {
-                    Log.e("flycast", "Error moving " + file.getAbsolutePath(), e);
-                }
-            }
-
-            private void moveDir(File from, File to)
-            {
-                //Log.d("flycast", "Moving dir " + from.getAbsolutePath() + " to " + to.getAbsolutePath());
-                if (!from.exists())
-                    return;
-                File[] files = from.listFiles();
-                if (files == null) {
-                    Log.e("flycast", "Can't list content of " + from.getAbsolutePath());
-                    return;
-                }
-                for (File file : files)
-                {
-                    if (migrationThreadCancelled)
-                        break;
-                    if (file.isFile())
-                        moveFile(file, to);
-                    else if (file.isDirectory() && !file.getName().equals("boxart")) {
-                        File subDir = new File(to, file.getName());
-                        subDir.mkdir();
-                        moveDir(file, subDir);
-                    }
-                }
-                from.delete();
-            }
-
-            private void migrate()
-            {
-                moveFile(new File(source, "emu.cfg"), dest);
-                if (migrationThreadCancelled)
-                    return;
-                File mappings = new File(dest, "mappings");
-                mappings.mkdirs();
-                moveDir(new File(source, "mappings"), mappings);
-                if (migrationThreadCancelled)
-                    return;
-                File data = new File(dest, "data");
-                data.mkdirs();
-                moveDir(new File(source, "data"), data);
-            }
-
-            @Override
-            public void run()
-            {
-                migrate();
-                runOnUiThread(() -> {
-                    prefs.edit().putString(Config.pref_home, getDefaultHomeDir()).apply();
-                    progress.dismiss();
-                    BaseGLActivity.this.finishCreation();
-                });
-            }
-            });
-        thread.start();
-    }
-
     // Called from native code
     public void onGameStateChange(boolean started) {
         runOnUiThread(new Runnable() {

shell/android-studio/flycast/src/main/java/com/flycast/emulator/NativeGLActivity.java

@@ -35,19 +35,13 @@ protected void onCreate(@Nullable Bundle savedInstanceState) {
 
         super.onCreate(savedInstanceState);
 
-        Log.i("flycast", "NativeGLActivity.onCreate done");
-    }
-
-    protected void finishCreation()
-    {
-        super.finishCreation();
         // Create the actual GL view
         mView = new NativeGLView(this);
         mLayout = new RelativeLayout(this);
         mLayout.addView(mView);
 
         setContentView(mLayout);
-        Log.i("flycast", "NativeGLActivity.finishCreation done");
+        Log.i("flycast", "NativeGLActivity.onCreate done");
     }
 
     @Override