Let's walk through the issues in your manifest that are triggering this parse error, plus cover other potential causes to check:

1. Invalid <meta-data> Tag #

Your <meta-data> element is missing a required attribute. Every <meta-data> tag must include both android:name and either android:value or android:resource. You only have the name attribute here, which breaks the manifest syntax rules.

2. Misplaced android:screenOrientation Attribute #

You added android:screenOrientation="landscape" to the <action> tag inside your intent filter—but this attribute belongs to the <activity> tag, not the action element. The intent filter's action tags only accept action-related attributes, so this is an invalid placement.

Corrected AndroidManifest.xml Code #

Here's the fixed version of your manifest with the above issues resolved:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.user.sudoku">
 <uses-permission android:name="android.permission.INTERNET" />
 <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme">
 <!-- Added dummy value to meta-data (replace with your actual value if needed) -->
 <meta-data android:name="com.google.android.actions" android:value="" />
 <!-- Moved screenOrientation to the activity tag -->
 <activity android:name=".GameMenu" android:screenOrientation="landscape">
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />
 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>
 <activity android:name=".MainActivity" android:theme="@style/AppTheme.NoActionBar" />
 </application>
</manifest>

Other Potential Causes of the Error #

If fixing the above doesn't resolve the issue, check these common culprits:

• Invalid characters: Hidden non-ASCII characters or Chinese punctuation in the manifest file (use a text editor's "show invisible characters" feature to check)
• Resource reference errors: Make sure resources like @mipmap/ic_launcher or @style/AppTheme actually exist in your project
• Component name mismatches: Verify that the activity names (.GameMenu, .MainActivity) match the actual class names in your code (case-sensitive, even if you think you checked)
• XML syntax issues: Unclosed tags, mismatched quotes, or incorrect namespace usage (double-check all tag closures)
• SDK compatibility: Ensure your manifest's target SDK version aligns with any features you're using (e.g., newer permissions or components require matching SDK levels)

内容的提问来源于stack exchange，提问作者Eddie Cohen