Develop Reference

I am getting blank screen after integrating google maps api in my android application

I tried integrating google maps API in my android application but I keep getting a blank grey screen. Attaching manifest and build.gradle file. The activity file contains the default code that comes while creating a google maps activity. You can clearly see this in manifest file.
I have mentioned the API key. I think the issue lies in dependencies, I might not have included every library that requires in order to run the app but I am not able to figure it out.
Android Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mppolice">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
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/Theme.MPPolice">
<!--
TODO: Before you run your application, you need a Google Maps API key.
To get one, follow the directions here:
https://developers.google.com/maps/documentation/android-sdk/get-api-key
Once you have your API key (it starts with "AIza"), define a new property in your
project's local.properties file (e.g. MAPS_API_KEY=Aiza...), and replace the
"YOUR_API_KEY" string in this file with "${MAPS_API_KEY}".
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="YOUR_API_KEY"/>
<activity
android:name=".NearbyPolice"
android:exported="false"/>
<activity
android:name=".More"
android:exported="false" />
<activity
android:name=".WomanHelpline"
android:exported="false" />
<activity
android:name=".Statistics"
android:exported="false" />
<activity
android:name=".MissingPerson"
android:exported="false" />
<activity
android:name=".NearbyOffenders"
android:exported="false" />
<activity
android:name=".Contacts"
android:exported="false" />
<activity
android:name=".CrimeReport"
android:exported="false" />
<activity
android:name=".PasswordActivity"
android:exported="false" />
<activity
android:name=".AuthScreen"
android:exported="false" />
<activity
android:name=".MainActivity"
android:exported="false"
android:label="#string/title_activity_main"
android:theme="#style/Theme.MPPolice.NoActionBar" />
<activity
android:name=".SplashScreen"
android:exported="true"
android:theme="#style/Theme.MPPolice.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Build.gradle
plugins {
id 'com.android.application'
id 'kotlin-android'
id 'kotlin-android-extensions'
id 'com.google.android.libraries.mapsplatform.secrets-gradle-plugin'
}
apply plugin: 'com.google.gms.google-services'
android {
compileSdk 31
defaultConfig {
applicationId "com.example.mppolice"
minSdk 21
targetSdk 31
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_11
targetCompatibility JavaVersion.VERSION_11
}
kotlinOptions {
jvmTarget = '11'
}
buildFeatures {
viewBinding true
}
}
dependencies {
implementation "androidx.cardview:cardview:1.0.0"
}
dependencies {
implementation 'androidx.core:core-ktx:1.8.0'
implementation 'androidx.appcompat:appcompat:1.4.2'
implementation 'com.google.android.material:material:1.6.1'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
implementation 'androidx.navigation:navigation-fragment-ktx:2.4.2'
implementation 'androidx.navigation:navigation-ui-ktx:2.4.2'
implementation 'com.google.firebase:firebase-auth:21.0.7'
implementation 'com.google.android.gms:play-services-maps:18.1.0'
implementation 'com.google.android.gms:play-services-location:20.0.0'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation platform('com.google.firebase:firebase-bom:30.3.1')
implementation 'com.google.firebase:firebase-analytics'
}

Error: Program type already present: com.getcapacitor.AndroidProtocolHandler

I want to generate APK of the ionic app but I am getting
Program type already present: com.getcapacitor.AndroidProtocolHandler
error while building the ionic 4 app with angular. I have searched this on the internet and find one solution which says change
implementation 'ionic-team:capacitor-android:1+'
to
implementation project(':capacitor-android')"
in dependencies in build.gradle file but I already have implementation project(':capacitor-android')" in my dependency and I'm still getting the error.
This is link to the solution I have tried: https://github.com/oxylian/capacitor-facebook-login/issues/3
This is my build.gradle file
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "io.ionic.starter"
minSdkVersion 21
targetSdkVersion 28
versionCode 1
versionName "1.0"
multiDexEnabled true
testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
repositories {
maven {
url "https://dl.bintray.com/ionic-team/capacitor"
}
flatDir{
dirs '../capacitor-cordova-android-plugins/src/main/libs', 'libs'
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation project(':capacitor-android')
// implementation 'ionic-team:capacitor-android:1+'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
implementation project(':capacitor-cordova-android-plugins')
}
apply from: 'capacitor.build.gradle'
try {
def servicesJSON = file('google-services.json')
if (servicesJSON.text) {
apply plugin: 'com.google.gms.google-services'
}
} catch(Exception e) {
logger.warn("google-services.json not found, google-services plugin not applied. Push Notifications won't work")
}
This is my AndroidManifest.xml file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="io.ionic.starter">
<application
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:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale"
android:name="io.ionic.starter.MainActivity"
android:label="#string/title_activity_main"
android:theme="#style/AppTheme.NoActionBarLaunch"
android:launchMode="singleTask">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="#string/custom_url_scheme" />
</intent-filter>
</activity>
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths"></meta-data>
</provider>
</application>
<!-- Permissions -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- Camera, Photos, input file -->
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Geolocation API -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-feature android:name="android.hardware.location.gps" />
<!-- Network API -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<!-- Navigator.getUserMedia -->
<!-- Video -->
<uses-permission android:name="android.permission.CAMERA" />
<!-- Audio -->
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
</manifest>

The problem is the date picker plugin, it has that line that you have mentioned
https://github.com/triniwiz/capacitor-datepicker/blob/master/src/android/capacitor-datepicker/build.gradle#L45
There is a pull request fixing it, but hasn’t been merged
https://github.com/triniwiz/capacitor-datepicker/pull/12

Manifest merger failed with multiple errors, how to solve this error?

I am new to Android Studio. I am encountering the error "Manifest merger failed with multiple errors, see logs"
I have tried all possible solutions I could come up with but am unable to solve the problem. It would be great if someone could help!
I have attached my manifest file.
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGEE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<uses-feature
android:name="android.hardware.camera.any"
android:required="true" />
<uses-feature
android:name="android.hardware.camera.autofocus"
android:required="false" />
<application tools:replace="android:appComponentFactory"
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"
android:usesCleartextTraffic="true">
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
<meta-data
android:name="unityplayer.SkipPermissionsDialog"
android:value="true" />
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".ItemsActivity" />
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="AIzaSyAgUK9uXUxu2f5rLdZGCsh5wy4pTn2JXMA" />
<activity
android:name=".MapsActivity"
android:label="activity_maps" />
<activity android:name=".MarkerActivity" />
<activity android:name=".MainActivity" />
<activity android:name=".RegisterActivity" />
<activity android:name=".Main2Activity"></activity>
</application>
</manifest>
The gradle file is as follows
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
buildToolsVersion "29.0.0"
defaultConfig {
applicationId "com.example.access"
minSdkVersion 23
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.google.android.gms:play-services-maps:17.0.0'
implementation 'androidx.appcompat:appcompat:1.0.0-alpha1'
implementation 'androidx.constraintlayout:constraintlayout:1.1.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'net.gotev:uploadservice:2.1'
implementation 'com.android.support:support-v4:28.0.0'
implementation 'com.amitshekhar.android:android-networking:1.0.1'
implementation 'com.squareup.picasso:picasso:2.71828'
implementation 'com.mcxiaoke.volley:library:1.0.19'
implementation 'com.squareup.okhttp3:okhttp:3.11.0'
//implementation 'com.android.volley:volley:1.1.0'
}

Default activity not found, even though it is declared in Manifest

I have not found the solution to this online. All of my activities are declared, however often Android Studio will tell me it does not find them. It doesn't always occur, and it seems to happen quite randomly. I've cleaned, invalidated and restarted, rebuild, sometimes this will get fixed then start happening again after some time. I'm working in a team on the project, and I seem to be the only one with the bug:
<?xml version="1.0" encoding="utf-8"?>
<manifest package="fall2018.csc2017.GameCentre"
xmlns:android="http://schemas.android.com/apk/res/android">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.AppCompat.Light.NoActionBar">
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SlidingTiles.SlidingGameActivity" />
<activity android:name=".Score.MenuScoreboardsActivity" />
<activity android:name=".Score.UserScoreboardActivity" />
<activity android:name=".Score.ScoreScreenActivity" />
<activity android:name=".Score.GameScoreboardActivity" />
<activity android:name=".GameLauncherActivity" />
<activity android:name=".RegisterActivity" />
<activity android:name=".SlidingTiles.SlidingTilesStartingActivity" />
<activity android:name=".Simon.SimonGameActivity" />
<activity android:name=".Simon.SimonStartingActivity" />
<activity android:name=".ChooseDimensionActivity"></activity>
</application>
This is my gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 27
defaultConfig {
applicationId "fall2018.csc2017.GameCentre"
minSdkVersion 27
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
testOptions {
unitTests.returnDefaultValues = true
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.0'
implementation 'com.android.support:design:27.1.1'
implementation 'com.android.support:support-v4:27.1.1'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

It is hard to tell what is the exact issue based on the only information you provided. But, few things you can try to find the issue:
Try running your app on a different physical device or emulator. If
it fixes it, that means that was a device issue.
Set breakpoints on all of your onCreate methods activities, as well as the previous code snippet where the activity will be launching the following activity, for example:
Intent intent = new Intent(context, className);
intent.setFlags(intFlag);
context.startActivity(intent);
And try to debug to see if the activity is being created or being launched. This could be a good start to narrow down the problem. Good luck!
FYI, switch this line :
<activity android:name=".ChooseDimensionActivity"></activity>
to this:
<activity android:name=".ChooseDimensionActivity"/>

app-release.apk showing "Parse error: There is a problm parsing application"

I have checked many answers but none of them helped
I am running it 5.1.1 android, and in build.gradle it is minSdkVersion as 15 so it should work.
I am able to run app-debug.apk on same device without any issue.
I have not renamed apk file after that, i have signed it for the first time manually in android studio.
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.3"
defaultConfig {
applicationId "com.example.raghav.pokemonfinder"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
packagingOptions {
exclude 'META-INF/LICENSE'
exclude 'META-INF/LICENSE-FIREBASE.txt'
exclude 'META-INF/NOTICE'
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.google.android.gms:play-services:9.0.2'
compile 'com.android.support:design:23.4.0'
apply plugin: 'com.google.gms.google-services'
compile 'com.firebase:firebase-client-android:2.4.0'
compile 'com.google.android.gms:play-services-location:9.0.2'
compile 'me.sargunvohra.lib:pokekotlin:2.2.3'
}
and here is my androidmanifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.raghav.pokemonfinder">
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:name="Utils.PokeMonFinder"
android:allowBackup="true"
android:icon="#drawable/icon2"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/MyMaterialTheme">
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="#string/google_maps_key" />
<activity
android:name=".MapsActivity"
android:label="#string/title_activity_maps" />
<activity android:name=".MapsShowActivity" />
<activity
android:name=".SplashScreenActivity"
android:theme="#android:style/Theme.Light.NoTitleBar.Fullscreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SubmitPokemon" />
<activity android:name=".PokemonDetailActivity" />
<activity
android:name=".HomeActivity"
android:label="#string/title_activity_home"
android:theme="#style/MyMaterialTheme" />
<activity android:name=".MyPokemonActivity" />
</application>
</manifest>