Default Activity not found

Question

I was making an app and at one point came across the error Default Activity not found. I tried to undo the changes and the error persisted . Trying to fix it I noticed that all the files .xml project present an error in the field tools:context= .

Androidmanifest.xml

<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"
    tools:ignore="GoogleAppIndexingWarning">

    <!--
         The API key for Google Maps-based APIs is defined as a string resource.
         (See the file "res/values/google_maps_api.xml").
         Note that the API key is linked to the encryption key used to sign the APK.
         You need a different API key for each encryption key, including the release key that is used to
         sign the APK for publishing.
         You can define the keys for the debug and release targets in src/debug/ and src/release/.
    -->
    <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="@string/google_maps_key" />

    <activity android:name=".activity.RequisicoesActivity" />
    <activity android:name=".activity.MapsActivity" />
    <activity
        android:name=".activity.CadastroActivity"
        android:label="@string/title_cadastro"
        android:parentActivityName=".activity.MainActivity" />
    <activity
        android:name=".activity.LoginActivity"
        android:label="@string/title_login"
        android:parentActivityName=".activity.MainActivity" />
    <activity
        android:name=".activity.MainActivity"
        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=".activity.MapsActivity" />
    <activity
        android:name=".activity.CadastroActivity"
        android:label="@string/title_cadastro"
        android:parentActivityName=".activity.MainActivity" />
    <activity
        android:name=".activity.LoginActivity"
        android:label="@string/title_login"
        android:parentActivityName=".activity.MainActivity" />
</application>

Answer 1

Remove the following part of the xml file from Activity ". Activity" and leave it this way:

tools:context=".MainActivity"