Android app gives “app not installed” error when opened from menu

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  • Forum posts: 1

Mar 6, 2017 8:01:17 AM via Website

I have built an Android app using Android studio 2.1.2 . I have generated the signed apk and published the same to Google Play store. Users are being able to download and install it. The issue arises after the installation . In some phones(Galaxy On7,Lenovo A6000 plus) the app cannot be opened from the menu or the home screen shortcut and the error pops up saying "app not installed", but it opens fine when opened from Play Store. Can anyone suggest why this might be happening ?
This is my manifest code:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="xxxxxxxxxxxxxxxxxx"
    package="com.crm.crmenterprise">
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.READ_LOGS" />
    <uses-permission android:name="android.permission.READ_CALL_LOG" />
    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:permission="android.permission.READ_PHONE_STATE"
            android:protectionLevel="dangerous">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".LeadActivity"
            android:label="@string/title_activity_lead"
            android:theme="@style/AppTheme">

        </activity>

    </application>

</manifest>

— modified on Mar 6, 2017 8:18:05 AM

  • Forum posts: 4

Jul 3, 2017 12:31:29 PM via Website

Possible Solutions of “Application not Installed” error
Reboot the phone: In times like this, first thing to do is to reboot your device. Or just shut down, remove and reinsert your battery.
Make sure to uninstall any apps you don’t use to free up space, also uninstall previous versions of the same app currently installed on your device.
Double check the apk files you download and be sure they were completely copied or downloaded.
Try resetting app permissions by going to Settings >Apps>All>Menu key >Reset application permissions or Reset app preferences.
Change app installation location to Automatic or Let system decide.
Make sure your SD card is not mounted or connected to a PC or elsewhere.
For worst case scenarios, format your SD card – copy it’s contents somewhere else for backup and format.
The last solution would be to totally wipe your device. Either by doing a factory reset under Settings or by doing a full wipe in recovery mode.
For more help visit Lenovo A6000 Manual- guideusermanual.com/product-name-a6000-smartphone-manual&po=331765&lang=English