Android Studio 3.5生成Release版APK无桌面启动图标问题求助

Hey Jonathan, I see exactly what's causing your issue here! Let's break it down and fix it quickly.

The Root Cause #

Looking at your AndroidManifest.xml, your MainActivity's <intent-filter> includes a <data android:mimeType="text/plain" /> tag. This changes how the system interprets your launcher activity:

• The system launcher sends an implicit Intent with android.intent.action.MAIN and android.intent.category.LAUNCHER, but no data attached.
• Your intent filter now requires the incoming Intent to have a text/plain MIME type, so the launcher can't match it. That's why your app shows up in the settings app list but not on the home screen or app drawer.
• Debug mode might have worked because Android Studio uses special debug hooks that bypass this strict intent filter matching, but Release mode follows the manifest rules strictly.

The Fix #

Simply remove the <data> tag from your MainActivity's intent filter. Here's the corrected manifest section:

<activity android:name=".MainActivity" android:screenOrientation="landscape">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

Steps to Verify #

• Clean your project (Build > Clean Project in Android Studio)
• Rebuild and generate a new signed Release APK
• Install the updated APK on your device—you should now see the launcher icon appear on your home screen/app drawer.

If you ever need that text/plain data filter for another use case, you can add a separate intent filter to the same activity instead of combining it with the launcher one. For example:

<activity android:name=".MainActivity" android:screenOrientation="landscape">
    <!-- Launcher intent filter -->
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
    <!-- Separate filter for text/plain data -->
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <data android:mimeType="text/plain" />
    </intent-filter>
</activity>

This way, your launcher icon works as expected, and your activity still handles text/plain data intents when needed.

内容的提问来源于stack exchange，提问作者Jonathan Corbett