无法打开（安装）从 android studio 构建的 apk

Question

I cant open APK that I built from android studio build > Generate Signed APK . the build went smooth without error but I could not open the APK to install it.

FYI I already tried another APK from somewhere and I could open it, so it's not my phone issue or security.

how to fix this? I am lost because there is no error. it just says can't open file .

this is my gradle

     apply plugin: 'com.android.application'

     apply plugin: 'kotlin-android'

     apply plugin: 'kotlin-android-extensions'

     android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.mockie.daikokuten"
        minSdkVersion 15
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    }

     dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support:support-v4:26.1.0'
    implementation 'com.android.support:design:26.1.0'
    implementation 'com.android.support:recyclerview-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.android.support:support-vector-drawable:26.1.0'
    implementation 'com.google.firebase:firebase-messaging:11.8.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    compile "org.jetbrains.anko:anko-sqlite:0.10.3"
    compile 'com.squareup.retrofit2:retrofit:2.3.0'
    compile "com.squareup.retrofit2:converter-moshi:2.0.0"
    compile 'com.android.volley:volley:1.1.0'
    implementation files('libs/tscsdk.jar')
}
apply plugin: 'com.google.gms.google-services'

Answer 1

Create you Signed APK with below process.

• Build > Generate Signed apk.
• Create Keystore path.
• Put Password, alias, key password .
• Build type ( Release for Play Store ).
• Signature Version select V1 and V2 both checkboxes inside this.
• Finish

Update

Also you may need to check that if an app is already installed with same package name . Go to Settings ==> Apps ==> Click on your App ==> In App info page at the action bar menu there will be an option called Uninstall for All users click that.

Answer 2

I was facing kind of the same issue with an Ionic 4 build Android app.

Once I built my app and got an apk, I open it with Android Studio then in menu I choose

Build > Build Bundle(s) / APK(s) > Build APK(s)

so I can install my apk on my device when I open the generated apk from Archive

Answer 3

Follow this article : https://docs.microsoft.com/en-us/xamarin/android/deploy-test/signing/manually-signing-the-apk

I had the same issue and the solution was to sign the apk by yourself. Generally, the IDE is responsible of this operation but sometimes it doesn't do the job.