Fix[storage]: better ensure mounted storage

Avoids several crashes caused by Pojav running on devices without always-mounted external storage.

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/BaseActivity.java

@@ -37,10 +37,7 @@ public abstract class BaseActivity extends AppCompatActivity {
     @Override
     protected void onResume() {
         super.onResume();
-        if(!Tools.checkStorageRoot(this)) {
+        Tools.checkStorageInteractive(this);
-            startActivity(new Intent(this, MissingStorageActivity.class));
-            finish();
-        }
     }
 
     @Override

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/ImportControlActivity.java

@@ -39,7 +39,12 @@ public class ImportControlActivity extends Activity {
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        Tools.initContextConstants(getApplicationContext());
+        if(Tools.checkStorageInteractive(this)) {
+            Tools.initStorageConstants(getApplicationContext());
+        }else {
+            // Return early, no initialization needed.
+            return;
+        }
 
         setContentView(R.layout.activity_import_control);
         mEditText = findViewById(R.id.editText_import_control_file_name);
@@ -61,6 +66,12 @@ public class ImportControlActivity extends Activity {
     @Override
     protected void onPostResume() {
         super.onPostResume();
+        if(!Tools.checkStorageInteractive(this)) {
+            // Don't try to read the file as when this check fails, external storage paths
+            // are no longer valid (likely unmounted).
+            // checkStorageInteractive() will finish this activity for us.
+            return;
+        }
         if(!mHasIntentChanged) return;
         mIsFileVerified = false;
         getUriData();

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/MainActivity.java

@@ -334,6 +334,9 @@ public class MainActivity extends BaseActivity implements ControlButtonMenuListe
 
         if (requestCode == 1 && resultCode == Activity.RESULT_OK) {
             // Reload PREF_DEFAULTCTRL_PATH
+            // If the storage root got unmounted/unreadable we won't be able to load the file anyway,
+            // and MissingStorageActivity will be started.
+            if(!Tools.checkStorageRoot(this)) return;
             LauncherPreferences.loadPreferences(getApplicationContext());
             try {
                 mControlLayout.loadLayout(LauncherPreferences.PREF_DEFAULTCTRL_PATH);

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/PojavApplication.java

@@ -57,10 +57,7 @@ public class PojavApplication extends Application {
 		
 		try {
 			super.onCreate();
-			
+			Tools.initEarlyConstants(this);
-			Tools.DIR_DATA = getDir("files", MODE_PRIVATE).getParent();
-			Tools.DIR_CACHE = getCacheDir();
-			Tools.DIR_ACCOUNT_NEW = Tools.DIR_DATA + "/accounts";
 			Tools.DEVICE_ARCHITECTURE = Architecture.getDeviceArchitecture();
 			//Force x86 lib directory for Asus x86 based zenfones
 			if(Architecture.isx86Device() && Architecture.is32BitsDevice()){

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/TestStorageActivity.java

@@ -60,7 +60,8 @@ public class TestStorageActivity extends Activity {
             startActivity(new Intent(this, MissingStorageActivity.class));
             return;
         }
-        //Only run them once we get a definitive green light to use storage
+        //Initialize constants after we confirm that we have storage.
+        Tools.initStorageConstants(getApplicationContext());
         AsyncAssetManager.unpackComponents(this);
         AsyncAssetManager.unpackSingleFiles(this);
 

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/Tools.java

@@ -32,7 +32,6 @@ import android.os.Bundle;
 import android.os.Environment;
 import android.os.Handler;
 import android.os.Looper;
-import android.os.Process;
 import android.provider.DocumentsContract;
 import android.provider.OpenableColumns;
 import android.util.ArrayMap;
@@ -164,14 +163,42 @@ public final class Tools {
     }
 
     /**
-     * Since some constant requires the use of the Context object
+     * Checks if the Pojav's storage root is accessible and read-writable. If it's not, starts
-     * You can call this function to initialize them.
+     * the MissingStorageActivity and finishes the supplied activity.
-     * Any value (in)directly dependant on DIR_DATA should be set only here.
+     * @param context the Activity that checks for storage availability
+     * @return whether the storage is available or not.
      */
-    public static void initContextConstants(Context ctx){
+    public static boolean checkStorageInteractive(Activity context) {
+        if(!Tools.checkStorageRoot(context)) {
+            context.startActivity(new Intent(context, MissingStorageActivity.class));
+            context.finish();
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Initialize context constants most necessary for launcher's early startup phase
+     * that are not dependent on user storage.
+     * All values that depend on DIR_DATA and are not dependent on DIR_GAME_HOME must
+     * be initialized here.
+     * @param ctx the context for initialization.
+     */
+    public static void initEarlyConstants(Context ctx) {
         DIR_CACHE = ctx.getCacheDir();
         DIR_DATA = ctx.getFilesDir().getParent();
         MULTIRT_HOME = DIR_DATA + "/runtimes";
+        DIR_ACCOUNT_NEW = DIR_DATA + "/accounts";
+        NATIVE_LIB_DIR = ctx.getApplicationInfo().nativeLibraryDir;
+    }
+
+    /**
+     * Initialize context constants that depend on user storage.
+     * Any value (in)directly dependent on DIR_GAME_HOME should be set only here.
+     * You ABSOLUTELY MUST check for storage presence using checkStorageRoot() before calling this.
+     */
+    public static void initStorageConstants(Context ctx){
+        initEarlyConstants(ctx);
         DIR_GAME_HOME = getPojavStorageRoot(ctx).getAbsolutePath();
         DIR_GAME_NEW = DIR_GAME_HOME + "/.minecraft";
         DIR_HOME_VERSION = DIR_GAME_NEW + "/versions";
@@ -181,7 +208,6 @@ public final class Tools {
         OBSOLETE_RESOURCES_PATH = DIR_GAME_NEW + "/resources";
         CTRLMAP_PATH = DIR_GAME_HOME + "/controlmap";
         CTRLDEF_FILE = DIR_GAME_HOME + "/controlmap/default.json";
-        NATIVE_LIB_DIR = ctx.getApplicationInfo().nativeLibraryDir;
     }
 
     /**

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/prefs/LauncherPreferences.java

@@ -70,8 +70,8 @@ public class LauncherPreferences {
 
 
     public static void loadPreferences(Context ctx) {
-        //Required for the data folder.
+        //Required for CTRLDEF_FILE and MultiRT
-        Tools.initContextConstants(ctx);
+        Tools.initStorageConstants(ctx);
         boolean isDevicePowerful = isDevicePowerful(ctx);
 
         PREF_RENDERER = DEFAULT_PREF.getString("renderer", "opengles2");

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/utils/LocaleUtils.java

@@ -11,7 +11,6 @@ import android.os.LocaleList;
 
 import androidx.preference.*;
 import java.util.*;
-import net.kdt.pojavlaunch.prefs.*;
 
 public class LocaleUtils extends ContextWrapper {
 
@@ -22,7 +21,10 @@ public class LocaleUtils extends ContextWrapper {
     public static ContextWrapper setLocale(Context context) {
         if (DEFAULT_PREF == null) {
             DEFAULT_PREF = PreferenceManager.getDefaultSharedPreferences(context);
-            LauncherPreferences.loadPreferences(context);
+            // Too early to initialize all prefs here, as this is called by PojavApplication
+            // before storage checks are done and before the storage paths are initialized.
+            // So only initialize PREF_FORCE_ENGLISH for the check below.
+            PREF_FORCE_ENGLISH = DEFAULT_PREF.getBoolean("force_english", false);
         }
 
         if(PREF_FORCE_ENGLISH){