Whenever I try running my application - this window in the screenshot is popping up in my screen. Stating that default activity is not found because of this I am not able to deploy my app:
Manifest file of my code
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mcs.oodoeg" >
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android3.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MainActivity2"
            android:label="@string/app_name" >
        </activity>
        <activity
            android:name=".Sigin"
            android:label="@string/app_name" >
        </activity>
    </application>
</manifest>
This is what the window which I am getting while clicking the Run-> Edit Congiguration:
Gradle file of my code:
apply plugin: 'com.android.application'
android {
    compileSdkVersion 23
    buildToolsVersion "19.1.0"
    defaultConfig {
        applicationId "com.example.mcs.oodoeg"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
        packagingOptions {
            exclude 'META-INF/LICENSE'
            exclude 'META-INF/NOTICE'
            exclude 'META-INF/DEPENDENCIES'
        }
}
dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile files('libs/xmlrpc-client-3.1.3.jar')
    compile files('libs/gson-2.2.2.jar')
}


 
     
     
     
     
     
     
     
     
     
     
     
     
     
    

