“无法识别启动活动：未找到默认活动” - Android Studio - 没有答案工作

Question

Whenever trying to run the app, getting the error:

"Could not identify launch activity: Default Activity not found".

I have seen a few other threads on the same issue, but the below solutions have not worked for me:

1. Invalidating gradle cache and re-running
2. Manually overriding in the edit configuration tab to select the default activity (it then says "The activity 'MainActivity' is not declared in AndroidManifest.xml" even though it is!)
3. Re-syncing the gradle files
4. Literally shuffling around the order of the activities in my manifest
5. Using the long name for my activities, but doesn't make any difference

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mywebname">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <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">

        <activity
            android:name=".MainActivity"
            android:screenOrientation="portrait"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity
            android:name=".ListenScreen"
            android:parentActivityName=".MainActivity"
            android:screenOrientation="portrait">
        </activity>

 </application>

</manifest>
```

As you can see, I have clearly declared the activities (my app only has 2 so far), and I've put the intents around the ".MainActivity".

Answer 1

This answer worked for me after trying so many other tweaks, just adding the package name solved my problems

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.name">

https://stackoverflow.com/a/72300233/8720836

Answer 2

您只需在清单标签中添加包名称即可在 app.gradle 文件中找到您的包名称，一切顺利