Android build v1.1.5

android/app/src/main/java/com/warren/iwanttoheal/ControllerBridgeActivity.java

@@ -1,6 +1,10 @@
 package com.warren.iwanttoheal;
 
 import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.SystemClock;
 import android.view.KeyEvent;
@@ -12,15 +16,22 @@ import java.io.File;
 public abstract class ControllerBridgeActivity extends BridgeActivity {
 
     public static final String EXTRA_INITIAL_URL = "com.warren.iwanttoheal.INITIAL_URL";
+    private static final String PREFS_NAME = "com.warren.iwanttoheal.performance";
+    private static final String CACHE_CLEARED_VERSION_KEY = "webview_cache_cleared_version";
     private static final long DPAD_THROTTLE_MS = 220;
     private long lastDpadDispatchAt = 0;
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
-        clearWebViewServiceWorkers();
+        boolean shouldClearWebViewCache = shouldClearWebViewCacheForCurrentVersion();
+        if (shouldClearWebViewCache) clearWebViewServiceWorkers();
         super.onCreate(savedInstanceState);
+        AndroidDisplayPerformance.preferBatteryRefreshRate(getWindow(), getWindowManager().getDefaultDisplay());
         if (bridge != null) {
-            bridge.getWebView().clearCache(true);
+            if (shouldClearWebViewCache) {
+                bridge.getWebView().clearCache(true);
+                markWebViewCacheClearedForCurrentVersion();
+            }
         }
         loadIntentUrl();
     }
@@ -35,7 +46,13 @@ public abstract class ControllerBridgeActivity extends BridgeActivity {
     @Override
     public void onWindowFocusChanged(boolean hasFocus) {
         super.onWindowFocusChanged(hasFocus);
-        if (hasFocus) enableImmersiveMode();
+        if (hasFocus) {
+            enableImmersiveMode();
+            AndroidDisplayPerformance.preferBatteryRefreshRate(
+                getWindow(),
+                getWindowManager().getDefaultDisplay()
+            );
+        }
     }
 
     @Override
@@ -74,6 +91,34 @@ public abstract class ControllerBridgeActivity extends BridgeActivity {
         deleteIfExists(new File(webViewData, "Service Worker"));
     }
 
+    private boolean shouldClearWebViewCacheForCurrentVersion() {
+        return performancePreferences().getLong(CACHE_CLEARED_VERSION_KEY, -1L)
+            != currentVersionCode();
+    }
+
+    private void markWebViewCacheClearedForCurrentVersion() {
+        performancePreferences()
+            .edit()
+            .putLong(CACHE_CLEARED_VERSION_KEY, currentVersionCode())
+            .apply();
+    }
+
+    private SharedPreferences performancePreferences() {
+        return getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
+    }
+
+    private long currentVersionCode() {
+        try {
+            PackageInfo packageInfo = getPackageManager().getPackageInfo(getPackageName(), 0);
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+                return packageInfo.getLongVersionCode();
+            }
+            return packageInfo.versionCode;
+        } catch (PackageManager.NameNotFoundException exception) {
+            return -1L;
+        }
+    }
+
     private void deleteIfExists(File file) {
         if (!file.exists()) return;
         if (file.isDirectory()) {