Android studio Default Activity not found

After i have created my own appplication class:

package com.example.bezzabarovaa.myapplication;

import android.app.Application;

import android.content.Context;



/**

 * Created by bezzabarovaa on 04.08.2017.

 */



public class app extends Application {

public static Context context;



@Override public void onCreate() {

    super.onCreate();

    context = getApplicationContext();

}



}

and have changed manifest.xml (changed application to app class)

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<app

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />

            <category android:name="android.intent.category.DEFAULT"/>

        </intent-filter>

    </activity>

</app>

I`ve got a message Error running Unnamed: Default Activity not found

If I will change my classapp back to application in manifest.xml - everything is ok.
Where is a problem?
Thank you.

asked Aug 4 '17 at 13:19

Андрей Б

3112

Where's your Activity?

– SripadRaj
Aug 4 '17 at 13:20

what makes you think you can change the tag name and it won't break?

– Tim Castelijns
Aug 4 '17 at 13:20

2

You can't change the tag names! You should use <application android:name=".app"> and please follow the Java guidelines, where a class name should be CamelCase (not app, but App in your case).

– shimatai
Aug 4 '17 at 14:17

add a comment |

After i have created my own appplication class:

package com.example.bezzabarovaa.myapplication;

import android.app.Application;

import android.content.Context;



/**

 * Created by bezzabarovaa on 04.08.2017.

 */



public class app extends Application {

public static Context context;



@Override public void onCreate() {

    super.onCreate();

    context = getApplicationContext();

}



}

and have changed manifest.xml (changed application to app class)

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<app

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />

            <category android:name="android.intent.category.DEFAULT"/>

        </intent-filter>

    </activity>

</app>

I`ve got a message Error running Unnamed: Default Activity not found

If I will change my classapp back to application in manifest.xml - everything is ok.
Where is a problem?
Thank you.

asked Aug 4 '17 at 13:19

Андрей Б

3112

Where's your Activity?

– SripadRaj
Aug 4 '17 at 13:20

what makes you think you can change the tag name and it won't break?

– Tim Castelijns
Aug 4 '17 at 13:20

2

You can't change the tag names! You should use <application android:name=".app"> and please follow the Java guidelines, where a class name should be CamelCase (not app, but App in your case).

– shimatai
Aug 4 '17 at 14:17

add a comment |

After i have created my own appplication class:

package com.example.bezzabarovaa.myapplication;

import android.app.Application;

import android.content.Context;



/**

 * Created by bezzabarovaa on 04.08.2017.

 */



public class app extends Application {

public static Context context;



@Override public void onCreate() {

    super.onCreate();

    context = getApplicationContext();

}



}

and have changed manifest.xml (changed application to app class)

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<app

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />

            <category android:name="android.intent.category.DEFAULT"/>

        </intent-filter>

    </activity>

</app>

I`ve got a message Error running Unnamed: Default Activity not found

If I will change my classapp back to application in manifest.xml - everything is ok.
Where is a problem?
Thank you.

asked Aug 4 '17 at 13:19

Андрей Б

3112

After i have created my own appplication class:

package com.example.bezzabarovaa.myapplication;

import android.app.Application;

import android.content.Context;



/**

 * Created by bezzabarovaa on 04.08.2017.

 */



public class app extends Application {

public static Context context;



@Override public void onCreate() {

    super.onCreate();

    context = getApplicationContext();

}



}

and have changed manifest.xml (changed application to app class)

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<app

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />

            <category android:name="android.intent.category.DEFAULT"/>

        </intent-filter>

    </activity>

</app>

I`ve got a message Error running Unnamed: Default Activity not found

If I will change my classapp back to application in manifest.xml - everything is ok.
Where is a problem?
Thank you.

android android-manifest

asked Aug 4 '17 at 13:19

Андрей Б

3112

asked Aug 4 '17 at 13:19

Андрей Б

3112

asked Aug 4 '17 at 13:19

Андрей Б

3112

asked Aug 4 '17 at 13:19

Андрей Б

3112

asked Aug 4 '17 at 13:19

Андрей Б

3112

Where's your Activity?

– SripadRaj
Aug 4 '17 at 13:20

what makes you think you can change the tag name and it won't break?

– Tim Castelijns
Aug 4 '17 at 13:20

2

You can't change the tag names! You should use <application android:name=".app"> and please follow the Java guidelines, where a class name should be CamelCase (not app, but App in your case).

– shimatai
Aug 4 '17 at 14:17

add a comment |

Where's your Activity?

– SripadRaj
Aug 4 '17 at 13:20

what makes you think you can change the tag name and it won't break?

– Tim Castelijns
Aug 4 '17 at 13:20

2

You can't change the tag names! You should use <application android:name=".app"> and please follow the Java guidelines, where a class name should be CamelCase (not app, but App in your case).

– shimatai
Aug 4 '17 at 14:17

Where's your Activity?

– SripadRaj
Aug 4 '17 at 13:20

what makes you think you can change the tag name and it won't break?

– Tim Castelijns
Aug 4 '17 at 13:20

You can't change the tag names! You should use <application android:name=".app"> and please follow the Java guidelines, where a class name should be CamelCase (not app, but App in your case).

– shimatai
Aug 4 '17 at 14:17

add a comment |

8 Answers
8

active

oldest

votes

This <app is supposed to be <application you specify your custom app in here:

<application android:name=".app" ...

Check the documentation the name section says:

The fully qualified name of an Application subclass implemented for
the application. When the application process is started, this class
is instantiated before any of the application's components. The
subclass is optional; most applications won't need one. In the absence
of a subclass, Android uses an instance of the base Application class.

Full example (with your code):

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />

            <category android:name="android.intent.category.DEFAULT"/>

        </intent-filter>

    </activity>

</application>

</manifest>

edited Aug 4 '17 at 13:29

answered Aug 4 '17 at 13:21

Matias Olocco

41939

add a comment |

Solved by clicking the "Sync project with gradle files"

answered Dec 8 '18 at 3:42

Polycarp Kavoo

475410

add a comment |

use below code snippet

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />



        </intent-filter>

    </activity>

</application>

Hope this will help you.

answered Aug 4 '17 at 13:24

Anurag Shrivastava

502419

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

1

@CodyGray; The asker's code does not include android:name=".app" part while this (and the other answer) does

– 0xDEADC0DE
Aug 4 '17 at 13:32

add a comment |

I faced the same problem a while ago, after changing my default activity to another.

What solved it was invalidate caches and restart Android Studio:

File -> Invalidate Caches / Restart...

and then clicking on Invalidate and Restart.

answered Aug 4 '17 at 13:24

GuilhermeFGL

1,2282628

add a comment |

You can get Android Studio not to complain by going to the "Edit Configurations" menu (tap "Shift" three times, type "Edit Configurations"), then change Launch Options > Launch to "Nothing".

I'll probably add a generic activity containing instructions, just to avoid any confusion.

answered Aug 25 '17 at 16:34

Morteza Djangjoo

756317

add a comment |

Add below line in your manifest application tag

<application

    android:name=".app"

    ...

     </application>

edited Apr 2 '18 at 6:29

Gowthaman M

4,64861840

answered Aug 4 '17 at 13:23

Vishal Vaishnav

2,0172932

2

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

add a comment |

-1

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.android.bluetoothlegatt">



    <uses-feature

        android:name="android.hardware.bluetooth_le"

        android:required="false" />



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

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

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

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



    <application

        android:icon="@drawable/app_icon"

        android:label="@string/app_name"

        android:theme="@android:style/Theme.Holo.Light">

        <activity

            android:name="com.example.android.bluetoothlegatt.DeviceScanActivity"

            android:icon="@drawable/app_icon"

            android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <action android:name="android.intent.action.VIEW" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity android:name="com.example.android.bluetoothlegatt.DeviceControlActivity" />



        <service android:name="com.example.android.bluetoothlegatt.BluetoothLeService" />

    </application>



</manifest>

answered Oct 12 '18 at 4:23

HARI HARAN

2

At least give some definition to your answer, it would be confusing to leave code without description.

– Akshay Paliwal
Oct 12 '18 at 7:10

check whether is " <category android:name="android.intent.category.LAUNCHER" />" in intent-filter

– HARI HARAN
Oct 12 '18 at 8:37

@HARIHARAN, topic starter already has it.

– CoolMind
Oct 12 '18 at 11:01

As it currently stands, this is a poor quality answer. Please provide an explanation of the code, and maybe emphasize the specific problem you solved.

– Janis F
Oct 12 '18 at 14:57

add a comment |

-1

I solved the very same issue by following steps

Close Android Studio

deleting from :

C:Usersyour user name.android/log and gradle folder

C:Usersyour user name.gradle

from C:Users[your user name]

Restart Computer and run Android studio (it Will take some time to rebuild)

answered Nov 16 '18 at 9:11

Ali Sidhu

add a comment |

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8 Answers
8

active

oldest

votes

8 Answers
8

active

oldest

votes

This <app is supposed to be <application you specify your custom app in here:

<application android:name=".app" ...

Check the documentation the name section says:

The fully qualified name of an Application subclass implemented for
the application. When the application process is started, this class
is instantiated before any of the application's components. The
subclass is optional; most applications won't need one. In the absence
of a subclass, Android uses an instance of the base Application class.

Full example (with your code):

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />

            <category android:name="android.intent.category.DEFAULT"/>

        </intent-filter>

    </activity>

</application>

</manifest>

edited Aug 4 '17 at 13:29

answered Aug 4 '17 at 13:21

Matias Olocco

41939

add a comment |

This <app is supposed to be <application you specify your custom app in here:

<application android:name=".app" ...

Check the documentation the name section says:

The fully qualified name of an Application subclass implemented for
the application. When the application process is started, this class
is instantiated before any of the application's components. The
subclass is optional; most applications won't need one. In the absence
of a subclass, Android uses an instance of the base Application class.

Full example (with your code):

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />

            <category android:name="android.intent.category.DEFAULT"/>

        </intent-filter>

    </activity>

</application>

</manifest>

edited Aug 4 '17 at 13:29

answered Aug 4 '17 at 13:21

Matias Olocco

41939

add a comment |

This <app is supposed to be <application you specify your custom app in here:

<application android:name=".app" ...

Check the documentation the name section says:

The fully qualified name of an Application subclass implemented for
the application. When the application process is started, this class
is instantiated before any of the application's components. The
subclass is optional; most applications won't need one. In the absence
of a subclass, Android uses an instance of the base Application class.

Full example (with your code):

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />

            <category android:name="android.intent.category.DEFAULT"/>

        </intent-filter>

    </activity>

</application>

</manifest>

edited Aug 4 '17 at 13:29

answered Aug 4 '17 at 13:21

Matias Olocco

41939

This <app is supposed to be <application you specify your custom app in here:

<application android:name=".app" ...

Check the documentation the name section says:

The fully qualified name of an Application subclass implemented for
the application. When the application process is started, this class
is instantiated before any of the application's components. The
subclass is optional; most applications won't need one. In the absence
of a subclass, Android uses an instance of the base Application class.

Full example (with your code):

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />

            <category android:name="android.intent.category.DEFAULT"/>

        </intent-filter>

    </activity>

</application>

</manifest>

edited Aug 4 '17 at 13:29

answered Aug 4 '17 at 13:21

Matias Olocco

41939

edited Aug 4 '17 at 13:29

answered Aug 4 '17 at 13:21

Matias Olocco

41939

answered Aug 4 '17 at 13:21

Matias Olocco

41939

answered Aug 4 '17 at 13:21

Matias Olocco

41939

add a comment |

Solved by clicking the "Sync project with gradle files"

answered Dec 8 '18 at 3:42

Polycarp Kavoo

475410

add a comment |

Solved by clicking the "Sync project with gradle files"

answered Dec 8 '18 at 3:42

Polycarp Kavoo

475410

add a comment |

Solved by clicking the "Sync project with gradle files"

answered Dec 8 '18 at 3:42

Polycarp Kavoo

475410

Solved by clicking the "Sync project with gradle files"

answered Dec 8 '18 at 3:42

Polycarp Kavoo

475410

answered Dec 8 '18 at 3:42

Polycarp Kavoo

475410

answered Dec 8 '18 at 3:42

Polycarp Kavoo

475410

answered Dec 8 '18 at 3:42

Polycarp Kavoo

475410

add a comment |

use below code snippet

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />



        </intent-filter>

    </activity>

</application>

Hope this will help you.

answered Aug 4 '17 at 13:24

Anurag Shrivastava

502419

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

1

@CodyGray; The asker's code does not include android:name=".app" part while this (and the other answer) does

– 0xDEADC0DE
Aug 4 '17 at 13:32

add a comment |

use below code snippet

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />



        </intent-filter>

    </activity>

</application>

Hope this will help you.

answered Aug 4 '17 at 13:24

Anurag Shrivastava

502419

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

1

@CodyGray; The asker's code does not include android:name=".app" part while this (and the other answer) does

– 0xDEADC0DE
Aug 4 '17 at 13:32

add a comment |

use below code snippet

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />



        </intent-filter>

    </activity>

</application>

Hope this will help you.

answered Aug 4 '17 at 13:24

Anurag Shrivastava

502419

use below code snippet

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.bezzabarovaa.myapplication">



<application

    android:name=".app"

    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:label = "@string/app_name">



        <intent-filter>

            <action android:name="android.intent.action.MAIN" />



            <category android:name="android.intent.category.LAUNCHER" />



        </intent-filter>

    </activity>

</application>

Hope this will help you.

answered Aug 4 '17 at 13:24

Anurag Shrivastava

502419

answered Aug 4 '17 at 13:24

Anurag Shrivastava

502419

answered Aug 4 '17 at 13:24

Anurag Shrivastava

502419

answered Aug 4 '17 at 13:24

Anurag Shrivastava

502419

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

1

@CodyGray; The asker's code does not include android:name=".app" part while this (and the other answer) does

– 0xDEADC0DE
Aug 4 '17 at 13:32

add a comment |

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

1

@CodyGray; The asker's code does not include android:name=".app" part while this (and the other answer) does

– 0xDEADC0DE
Aug 4 '17 at 13:32

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

@CodyGray; The asker's code does not include android:name=".app" part while this (and the other answer) does

– 0xDEADC0DE
Aug 4 '17 at 13:32

add a comment |

I faced the same problem a while ago, after changing my default activity to another.

What solved it was invalidate caches and restart Android Studio:

File -> Invalidate Caches / Restart...

and then clicking on Invalidate and Restart.

answered Aug 4 '17 at 13:24

GuilhermeFGL

1,2282628

add a comment |

I faced the same problem a while ago, after changing my default activity to another.

What solved it was invalidate caches and restart Android Studio:

File -> Invalidate Caches / Restart...

and then clicking on Invalidate and Restart.

answered Aug 4 '17 at 13:24

GuilhermeFGL

1,2282628

add a comment |

I faced the same problem a while ago, after changing my default activity to another.

What solved it was invalidate caches and restart Android Studio:

File -> Invalidate Caches / Restart...

and then clicking on Invalidate and Restart.

answered Aug 4 '17 at 13:24

GuilhermeFGL

1,2282628

I faced the same problem a while ago, after changing my default activity to another.

What solved it was invalidate caches and restart Android Studio:

File -> Invalidate Caches / Restart...

and then clicking on Invalidate and Restart.

answered Aug 4 '17 at 13:24

GuilhermeFGL

1,2282628

answered Aug 4 '17 at 13:24

GuilhermeFGL

1,2282628

answered Aug 4 '17 at 13:24

GuilhermeFGL

1,2282628

answered Aug 4 '17 at 13:24

GuilhermeFGL

1,2282628

add a comment |

You can get Android Studio not to complain by going to the "Edit Configurations" menu (tap "Shift" three times, type "Edit Configurations"), then change Launch Options > Launch to "Nothing".

I'll probably add a generic activity containing instructions, just to avoid any confusion.

answered Aug 25 '17 at 16:34

Morteza Djangjoo

756317

add a comment |

You can get Android Studio not to complain by going to the "Edit Configurations" menu (tap "Shift" three times, type "Edit Configurations"), then change Launch Options > Launch to "Nothing".

I'll probably add a generic activity containing instructions, just to avoid any confusion.

answered Aug 25 '17 at 16:34

Morteza Djangjoo

756317

add a comment |

You can get Android Studio not to complain by going to the "Edit Configurations" menu (tap "Shift" three times, type "Edit Configurations"), then change Launch Options > Launch to "Nothing".

I'll probably add a generic activity containing instructions, just to avoid any confusion.

answered Aug 25 '17 at 16:34

Morteza Djangjoo

756317

You can get Android Studio not to complain by going to the "Edit Configurations" menu (tap "Shift" three times, type "Edit Configurations"), then change Launch Options > Launch to "Nothing".

I'll probably add a generic activity containing instructions, just to avoid any confusion.

answered Aug 25 '17 at 16:34

Morteza Djangjoo

756317

answered Aug 25 '17 at 16:34

Morteza Djangjoo

756317

answered Aug 25 '17 at 16:34

Morteza Djangjoo

756317

answered Aug 25 '17 at 16:34

Morteza Djangjoo

756317

add a comment |

Add below line in your manifest application tag

<application

    android:name=".app"

    ...

     </application>

edited Apr 2 '18 at 6:29

Gowthaman M

4,64861840

answered Aug 4 '17 at 13:23

Vishal Vaishnav

2,0172932

2

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

add a comment |

Add below line in your manifest application tag

<application

    android:name=".app"

    ...

     </application>

edited Apr 2 '18 at 6:29

Gowthaman M

4,64861840

answered Aug 4 '17 at 13:23

Vishal Vaishnav

2,0172932

2

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

add a comment |

Add below line in your manifest application tag

<application

    android:name=".app"

    ...

     </application>

edited Apr 2 '18 at 6:29

Gowthaman M

4,64861840

answered Aug 4 '17 at 13:23

Vishal Vaishnav

2,0172932

Add below line in your manifest application tag

<application

    android:name=".app"

    ...

     </application>

edited Apr 2 '18 at 6:29

Gowthaman M

4,64861840

answered Aug 4 '17 at 13:23

Vishal Vaishnav

2,0172932

edited Apr 2 '18 at 6:29

Gowthaman M

4,64861840

edited Apr 2 '18 at 6:29

Gowthaman M

4,64861840

edited Apr 2 '18 at 6:29

Gowthaman M

4,64861840

answered Aug 4 '17 at 13:23

Vishal Vaishnav

2,0172932

answered Aug 4 '17 at 13:23

Vishal Vaishnav

2,0172932

answered Aug 4 '17 at 13:23

Vishal Vaishnav

2,0172932

2

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

add a comment |

2

How does this code solve the asker's problem? He already says he knows it works if he changes it back to <application>. That's exactly what you've recommended here.

– Cody Gray♦
Aug 4 '17 at 13:29

add a comment |

-1

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.android.bluetoothlegatt">



    <uses-feature

        android:name="android.hardware.bluetooth_le"

        android:required="false" />



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

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

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

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



    <application

        android:icon="@drawable/app_icon"

        android:label="@string/app_name"

        android:theme="@android:style/Theme.Holo.Light">

        <activity

            android:name="com.example.android.bluetoothlegatt.DeviceScanActivity"

            android:icon="@drawable/app_icon"

            android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <action android:name="android.intent.action.VIEW" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity android:name="com.example.android.bluetoothlegatt.DeviceControlActivity" />



        <service android:name="com.example.android.bluetoothlegatt.BluetoothLeService" />

    </application>



</manifest>

answered Oct 12 '18 at 4:23

HARI HARAN

2

At least give some definition to your answer, it would be confusing to leave code without description.

– Akshay Paliwal
Oct 12 '18 at 7:10

check whether is " <category android:name="android.intent.category.LAUNCHER" />" in intent-filter

– HARI HARAN
Oct 12 '18 at 8:37

@HARIHARAN, topic starter already has it.

– CoolMind
Oct 12 '18 at 11:01

As it currently stands, this is a poor quality answer. Please provide an explanation of the code, and maybe emphasize the specific problem you solved.

– Janis F
Oct 12 '18 at 14:57

add a comment |

-1

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.android.bluetoothlegatt">



    <uses-feature

        android:name="android.hardware.bluetooth_le"

        android:required="false" />



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

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

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

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



    <application

        android:icon="@drawable/app_icon"

        android:label="@string/app_name"

        android:theme="@android:style/Theme.Holo.Light">

        <activity

            android:name="com.example.android.bluetoothlegatt.DeviceScanActivity"

            android:icon="@drawable/app_icon"

            android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <action android:name="android.intent.action.VIEW" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity android:name="com.example.android.bluetoothlegatt.DeviceControlActivity" />



        <service android:name="com.example.android.bluetoothlegatt.BluetoothLeService" />

    </application>



</manifest>

answered Oct 12 '18 at 4:23

HARI HARAN

2

At least give some definition to your answer, it would be confusing to leave code without description.

– Akshay Paliwal
Oct 12 '18 at 7:10

check whether is " <category android:name="android.intent.category.LAUNCHER" />" in intent-filter

– HARI HARAN
Oct 12 '18 at 8:37

@HARIHARAN, topic starter already has it.

– CoolMind
Oct 12 '18 at 11:01

As it currently stands, this is a poor quality answer. Please provide an explanation of the code, and maybe emphasize the specific problem you solved.

– Janis F
Oct 12 '18 at 14:57

add a comment |

-1

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.android.bluetoothlegatt">



    <uses-feature

        android:name="android.hardware.bluetooth_le"

        android:required="false" />



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

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

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

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



    <application

        android:icon="@drawable/app_icon"

        android:label="@string/app_name"

        android:theme="@android:style/Theme.Holo.Light">

        <activity

            android:name="com.example.android.bluetoothlegatt.DeviceScanActivity"

            android:icon="@drawable/app_icon"

            android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <action android:name="android.intent.action.VIEW" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity android:name="com.example.android.bluetoothlegatt.DeviceControlActivity" />



        <service android:name="com.example.android.bluetoothlegatt.BluetoothLeService" />

    </application>



</manifest>

answered Oct 12 '18 at 4:23

HARI HARAN

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.android.bluetoothlegatt">



    <uses-feature

        android:name="android.hardware.bluetooth_le"

        android:required="false" />



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

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

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

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



    <application

        android:icon="@drawable/app_icon"

        android:label="@string/app_name"

        android:theme="@android:style/Theme.Holo.Light">

        <activity

            android:name="com.example.android.bluetoothlegatt.DeviceScanActivity"

            android:icon="@drawable/app_icon"

            android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <action android:name="android.intent.action.VIEW" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity android:name="com.example.android.bluetoothlegatt.DeviceControlActivity" />



        <service android:name="com.example.android.bluetoothlegatt.BluetoothLeService" />

    </application>



</manifest>

answered Oct 12 '18 at 4:23

HARI HARAN

answered Oct 12 '18 at 4:23

HARI HARAN

answered Oct 12 '18 at 4:23

HARI HARAN

answered Oct 12 '18 at 4:23

HARI HARAN

2

At least give some definition to your answer, it would be confusing to leave code without description.

– Akshay Paliwal
Oct 12 '18 at 7:10

check whether is " <category android:name="android.intent.category.LAUNCHER" />" in intent-filter

– HARI HARAN
Oct 12 '18 at 8:37

@HARIHARAN, topic starter already has it.

– CoolMind
Oct 12 '18 at 11:01

As it currently stands, this is a poor quality answer. Please provide an explanation of the code, and maybe emphasize the specific problem you solved.

– Janis F
Oct 12 '18 at 14:57

add a comment |

2

At least give some definition to your answer, it would be confusing to leave code without description.

– Akshay Paliwal
Oct 12 '18 at 7:10

check whether is " <category android:name="android.intent.category.LAUNCHER" />" in intent-filter

– HARI HARAN
Oct 12 '18 at 8:37

@HARIHARAN, topic starter already has it.

– CoolMind
Oct 12 '18 at 11:01

As it currently stands, this is a poor quality answer. Please provide an explanation of the code, and maybe emphasize the specific problem you solved.

– Janis F
Oct 12 '18 at 14:57

At least give some definition to your answer, it would be confusing to leave code without description.

– Akshay Paliwal
Oct 12 '18 at 7:10

check whether is " <category android:name="android.intent.category.LAUNCHER" />" in intent-filter

– HARI HARAN
Oct 12 '18 at 8:37

@HARIHARAN, topic starter already has it.

– CoolMind
Oct 12 '18 at 11:01

As it currently stands, this is a poor quality answer. Please provide an explanation of the code, and maybe emphasize the specific problem you solved.

– Janis F
Oct 12 '18 at 14:57

add a comment |

-1

I solved the very same issue by following steps

Close Android Studio

deleting from :

C:Usersyour user name.android/log and gradle folder

C:Usersyour user name.gradle

from C:Users[your user name]

Restart Computer and run Android studio (it Will take some time to rebuild)

answered Nov 16 '18 at 9:11

Ali Sidhu

add a comment |

-1

I solved the very same issue by following steps

Close Android Studio

deleting from :

C:Usersyour user name.android/log and gradle folder

C:Usersyour user name.gradle

from C:Users[your user name]

Restart Computer and run Android studio (it Will take some time to rebuild)

answered Nov 16 '18 at 9:11

Ali Sidhu

add a comment |

-1

I solved the very same issue by following steps

Close Android Studio

deleting from :

C:Usersyour user name.android/log and gradle folder

C:Usersyour user name.gradle

from C:Users[your user name]

Restart Computer and run Android studio (it Will take some time to rebuild)

answered Nov 16 '18 at 9:11

Ali Sidhu

I solved the very same issue by following steps

Close Android Studio

deleting from :

C:Usersyour user name.android/log and gradle folder

C:Usersyour user name.gradle

from C:Users[your user name]

Restart Computer and run Android studio (it Will take some time to rebuild)

answered Nov 16 '18 at 9:11

Ali Sidhu

answered Nov 16 '18 at 9:11

Ali Sidhu

answered Nov 16 '18 at 9:11

Ali Sidhu

answered Nov 16 '18 at 9:11

Ali Sidhu

add a comment |

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