Meteor 1.8.1 Android应用HCP无法更新问题求助

Let's tackle your HCP update problems one by one, since they’re all interconnected:

1. Resolve Asset Manifest Parsing Error #

The error Caused by: org.json.JSONException: Value <!DOCTYPE of type java.lang.String cannot be converted to JSONObject makes it clear your app is receiving an HTML page (like a 404 error) instead of a valid JSON manifest from your server. This directly links to your later discovery of mismatched App IDs. Here’s how to fix it:

• Align App IDs Perfectly: Your Android app’s ID is defined in config.xml as the id attribute of the <widget> tag (e.g., <widget id="com.your.app.id" ...>). Set your server’s APP_ID environment variable to this exact string—typos or case differences will break matching.
• Validate the Manifest Endpoint: Visit http://your-server-url/__cordova/manifest.json in a browser. It should return a valid JSON object with asset hashes. If it returns HTML, your server’s APP_ID is still misconfigured.

2. Fix Missing Cordova Resources #

Logs showing missing /cordova.js, /cordova_plugins.js, and plugin files mean Meteor isn’t packaging Cordova assets into your HCP bundles. Let’s correct that:

• Ensure the WebApp Plugin is Installed: Run meteor add cordova:cordova-plugin-meteor-webapp@1.9.0 (this version is compatible with Meteor 1.8.1). This plugin manages HCP assets and update logic.
• Rebuild Cleanly:

  # Reset Cordova platform config
  meteor remove-platform android
  meteor add-platform android
  # Rebuild server with updated Cordova assets
  meteor build ../build-output --server your-server-url
  

• Leave Auto-Generated Folders Alone: Never manually edit or delete the __cordova directory—Meteor generates this automatically during builds, and tampering breaks resource mapping.

3. Fix mobile-config.js Failure in Meteor 1.8.1 #

Meteor 1.8.1 changed how mobile-config.js is handled compared to 1.4. Here’s the correct setup:

• File Location: Place mobile-config.js in your project root (same level as the .meteor folder)—Meteor reads it automatically, so you don’t need to pass it via --mobile-settings (that flag is for JSON settings files, not this JS config).
• Correct Syntax:

  // mobile-config.js
  App.info({
    id: 'com.your.app.id', // Must match config.xml's widget ID and server APP_ID
    name: 'Your App Name',
    version: '1.0.0'
  });
  
  // Configure HCP behavior
  App.configurePlugin('cordova-plugin-meteor-webapp', {
    update: 'auto', // Auto-check for updates on app start; use 'none' for manual control
    minimumBackgroundDuration: 30 // Optional: Wait 30s in background before applying updates
  });
  

• Rebuild After Changes: After updating mobile-config.js, re-run the platform removal/addition and build commands to apply the new config.

4. Ensure HCP Update Logic Works Correctly #

Even with correct configuration, you might need to adjust how you trigger updates:

• Wait for deviceready: Cordova plugins (including HCP) aren’t initialized until the deviceready event fires. Wrap your manual update check in this event:

  Meteor.startup(() => {
    document.addEventListener('deviceready', () => {
      // Check for updates manually
      WebAppLocalServer.checkForUpdates((error, updateAvailable) => {
        if (error) {
          console.error('HCP Check Failed:', error);
          return;
        }
        if (updateAvailable) {
          // Apply update and reload
          WebAppLocalServer.applyUpdate(() => {
            console.log('Update applied—restarting app');
            location.reload();
          });
        }
      });
    }, false);
  });
  

• Verify Auto-Update: If you set update: 'auto' in mobile-config.js, the app should automatically check for updates on startup and apply them in the background (based on your minimumBackgroundDuration setting).

5. Fix Uninstall/Reinstall Not Reflecting Updates #

If uninstalling and reinstalling doesn’t pull the latest content, it’s likely a caching issue:

• Clear Server Cache: Restart your Meteor server to ensure it’s serving the latest manifest and assets.
• Clear App Storage: On Android, go to Settings > Apps > Your App > Storage > Clear Storage + Clear Cache, then reinstall.
• Validate Server Assets: Check the assets/app/manifest.json file in your Meteor server build output to confirm the hashes match your updated public folder content.

内容的提问来源于stack exchange，提问作者oazabir