Introduces a redirect guard so share requests and quick settings tile compose requests when not logged in will give a login page instead of crashing.

app/src/main/java/com/keylesspalace/tusky/BaseActivity.java

@@ -61,6 +61,7 @@ public class BaseActivity extends AppCompatActivity {
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        redirectIfNotLoggedIn();
         createMastodonAPI();
         createTuskyAPI();
 
@@ -153,6 +154,19 @@ public class BaseActivity extends AppCompatActivity {
         tuskyAPI = retrofit.create(TuskyAPI.class);
     }
 
+    protected void redirectIfNotLoggedIn() {
+        SharedPreferences preferences = getSharedPreferences(
+                getString(R.string.preferences_file_key), Context.MODE_PRIVATE);
+        String domain = preferences.getString("domain", null);
+        String accessToken = preferences.getString("accessToken", null);
+        if (domain != null && accessToken != null) {
+            Intent intent = new Intent(this, MainActivity.class);
+            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
+            startActivity(intent);
+            finish();
+        }
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         TypedValue value = new TypedValue();