06-19 13:12:04.579 2944-2944/com.abhishek.tracker E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.abhishek.tracker, PID: 2944
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Context.getPackageName()' on a null object reference
    at android.content.ContextWrapper.getPackageName(ContextWrapper.java:133)
    at android.app.ActivityThread.installProvider(ActivityThread.java:5424)
    at android.app.ActivityThread.installContentProviders(ActivityThread.java:5011)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4951)
    at android.app.ActivityThread.-wrap1(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1560)
    at android.os.Handler.dispatchMessage(Handler.java:111)
    at android.os.Looper.loop(Looper.java:207)
    at android.app.ActivityThread.main(ActivityThread.java:5765)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)

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

<application
    android:name=".TrackerApp"
    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=".ui.TrackerListActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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

    <service
        android:name=".service.TrackerService"
        android:enabled="true"
        android:exported="true"></service>
</application>

</manifest>

open class TrackerApp: DaggerApplication() {

lateinit var androidInjector: AndroidInjector<out DaggerApplication>

override fun applicationInjector(): AndroidInjector<out DaggerApplication> = androidInjector

override fun attachBaseContext(base: Context?) {
    androidInjector =DaggerAppComponent
            .builder()
            .application(this)
            .database(DatabaseModule())
            .build()
}
}