How to call activity from a library module in android studio

Question

I am trying to call an activity from a library module in my application. I keep getting the error

android.content.ActivityNotFoundException: Unable to find explicit activity class {com.nextgis.mobile/com.nextgis.mobile.activity.MainActivity}; have you declared this activity in your AndroidManifest.xml?

I am calling the activity as

Intent intentGIS = new Intent(android.content.Intent.ACTION_VIEW);
intentGIS.setComponent(new ComponentName("com.nextgis.mobile",
                    "com.nextgis.mobile.activity.MainActivity"));
startActivity(intentGIS);

App manifest :

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

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />

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

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission-sdk-23 android:name="android.permission.WRITE_SETTINGS" />

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

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.GET_ACCOUNTS"/>
<uses-permission android:name="android.permission.MANAGE_ACCOUNTS"/>
<uses-permission android:name="android.permission.READ_SYNC_SETTINGS"/>
<uses-permission android:name="android.permission.READ_SYNC_STATS"/>
<uses-permission android:name="android.permission.USE_CREDENTIALS"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS"/>
<uses-permission android:name="android.permission.VIBRATE"/>


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

<uses-feature
    android:name="android.hardware.location"
    android:required="true"
    />
<uses-feature
    android:name="android.hardware.telephony"
    android:required="false"
    />
<uses-feature
    android:name="android.hardware.wifi"
    android:required="false"
    />
<!--
    <uses-feature
        android:name="android.hardware.camera"
        android:required="false"
        />
    <uses-feature
        android:name="android.hardware.compass"
        android:required="false"
        />
-->


<supports-screens
    android:largeScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"
    android:normalScreens="true"
    android:xlargeScreens="true"
    android:resizeable="true"
    />

<application
    android:allowBackup="true"
    android:icon="@drawable/logo"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme"
    tools:node="replace">
    <activity
        android:name=".SplashActivity"
        android:windowSoftInputMode="stateHidden|adjustUnspecified"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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

    <activity
        android:name="com.disarm.sanna.pdm.ShareActivity"
        android:label="@string/app_name">
    </activity>

    <activity android:name=".SelectCategoryActivity"
        android:label="@string/app_name">
    </activity>

    <activity android:name=".SocialShareActivity"
        android:label="@string/app_name">
    </activity>

    <activity
        android:name=".MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>
    <activity
        android:name=".ActivityList"
        android:windowSoftInputMode="stateHidden|adjustPan"
        android:theme="@style/Theme.AppCompat.DayNight.NoActionBar">
    </activity>
    <activity
        android:name=".Capture.Photo"
        android:theme="@style/AppCompatAlertDialogStyle"
        >
    </activity>
    <activity
        android:name=".Capture.Video"
        android:theme="@style/AppCompatAlertDialogStyle"
        >
    </activity>
    <activity
        android:label="Record Audio"
        android:name=".Capture.AudioCapture"
        android:theme="@style/Theme.AppCompat.Light.Dialog"
        >
    </activity>
    <activity
        android:label="@string/allow_setting"
        android:name=".WriteSettingActivity"
        android:theme="@style/AppTheme"
        >
    </activity>
    <service
        android:name=".Service.SyncService"
        android:enabled="true"
        android:exported="true" />
    <service android:name=".DisarmConnect.MyService" />
</application>
</manifest>

Library manifest :

<?xml version="1.0" encoding="utf-8"?>
<!--
~ Project:  NextGIS Mobile
~ Purpose:  Mobile GIS for Android.
~ Author:   Dmitry Baryshnikov (aka Bishop), [email protected]
~ Author:   NikitaFeodonit, [email protected]
~ Author:   Stanislav Petriakov, [email protected]
~      ******************************************************************************
~ Copyright (c) 2012-2016 NextGIS, [email protected]
~
~ This program is free software: you can redistribute it and/or modify
~ it under the terms of the GNU General Public License as published by
~ the Free Software Foundation, either version 3 of the License, or
~ (at your option) any later version.
~
~ This program is distributed in the hope that it will be useful,
~ but WITHOUT ANY WARRANTY; without even the implied warranty of
~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
~ GNU General Public License for more details.
~
~ You should have received a copy of the GNU General Public License
~ along with this program.  If not, see     <http://www.gnu.org/licenses/>.
-->

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



<application
    android:allowBackup="true"
    android:label="@string/app_name"
    >
    <activity
        android:name=".activity.MainActivity"
        android:label="@string/app_name"
        >
    </activity>

    <activity
        android:name=".activity.SettingsActivity"
        android:label="@string/action_settings"
        />

    <activity
        android:name=".activity.NGWSettingsActivityProxy"
        android:label="@string/ngw_settings"
        />

    <activity
        android:name=".activity.AboutActivity"
        android:label="@string/action_help"
        />

    <activity
        android:name=".activity.CreateVectorLayerActivity"
        android:label="@string/create_layer"
        android:screenOrientation="portrait"
        />

    <service
        android:name="com.nextgis.mobile.datasource.SyncService"
        >
        <intent-filter>
            <action
                android:name="android.content.SyncAdapter"
                />
        </intent-filter>
        <meta-data
            android:name="android.content.SyncAdapter"
            android:resource="@xml/syncadapter"
            />
    </service>

    <provider
        android:name="com.nextgis.maplib.datasource.LayerContentProvider"
        android:authorities="com.nextgis.mobile.provider"
        android:exported="false"
        android:syncable="true"
        />

</application>

</manifest>

I have added compile project(':gisapp') in the gradle file for the module app. I know gradle does manifest merging automatically but I could be wrong.

What am I doing wrong here ?

Note : This is the project which I am using as library.

Solution

We can use reflection to get class object.

Class.forName("com.mypackage.myMainActivity")

Add this code in Library project to call,

try {
      Intent myIntent = new Intent(this,Class.forName("com.mypackage.myMainActivity"));
      startActivity(myIntent );
} catch (ClassNotFoundException e) {
     e.printStackTrace();
}

"com.mypackage.myMainActivity" is the Activity present in Main project, that we need to call from its Library project.

Comments

[Daniel Handojo]

A lot of the other posts focus on putting includes in the settings.gradle and adding the module as a dependency, but I was still unable to import the file. Out of curiosity, why does this method work (and more importantly, why does statically importing not seem to work)? Kudos for the working answer though.