2020欧洲杯时间表

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Questions tagged [android]

Android is Google's mobile operating system, used for programming or developing digital devices (Smartphones, Tablets, Automobiles, TVs, Wear, Glass, IoT). For topics related to Android, use Android-specific tags such as android-intent, android-activity, android-adapter, etc. For questions other than development or programming, but related to the Android framework, use this link: http://android.stackexchange.com.

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Resetting values each day to 0 in Kotlin, Android Studio?

I'm having problem with my step counter, I want it to reset to 0 every time the date changes. I tried doing something like this: if (currentDate != savedDate) { previousSteps = totalSteps ...
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Java NullPointerExceptions to things that exists

I'm getting this exception on items that I know exist like a TextView and a Button, The only reason I can think of is because of how I'm setting up the layout. I'm showing one activity depending if ...
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Cannot see all devices with Bluetooth (not interested in establish connections)

I would like clarification on device scanning using bluetooth in React Native. I state one thing: I am not interested in establishing connections with the devices, it is enough for me to know that ...
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How to add a feedback button to Android Exoplayer

How to add a feedback button to Android Exoplayer 2. I cannot add any action buttons. I followed many tutorials like: http://medium.com/google-exoplayer/customizing-exoplayers-ui-components-...
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1answer
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W/BluetoothGatt: Unhandled exception in callback

I will explain my problem, I charge a list of BLEs availables an when a find one in concret i do the next gatt = device.connectGatt(MainActivity.this, true, gattCallback); and everything is fine ...
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How to specify a source set for a module properly?

I have a base module where I store common resources. But when I try to use these resources in my main module without full package name (e.g com.company.module.main.R.sourcename) I get compile time ...
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problem when parsing JSON with Google Places API

hey i am trying to parse the json data from a http request to google places api and i am facing couple of problems: 1.somehow not all of the json data is being parsed and i see only part of it when i ...
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Erase canvas bitmap with alpha rubber

The intention is that the rubber/eraser interacted by user touch take two or more passes over to completely erase the image. The current code is erasing the bitmap with only touch and I'm working on ...
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Nativescript-Vue Photo Zoom plugin doesn't work

I'm trying to use the Photo Zoom plugin in my Nativescript-Vue application: http://market.nativescript.org/plugins/nativescript-photo-zoom I already initializate the Fresco plugin: var ...
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8 views

Room query that should return LiveData always returns NULL

I want to create a login screen in android using Room/SQLLite. Once my login activity is launched, a user object will be inserted in the database. When pressing on the login button, I want to look ...
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NavigationComponents onBackPressed works for the system backpress only

I need to show a dialog when I press back from my fragment, it works for the system backbutton bar doing this requireActivity().onBackPressedDispatcher.addCallback { showDialog() }...
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Is there a simple way to “translate” JAVA android SDK or Swift IOS SDK to Unity?

Dear community ! I have a request from a business owner for Unity implementation.Unfortunately, I have JAVA and Kotlin SDK and Objective-C / Swift SDK for mobile app. And there is no way I can write ...
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Google Maps not displaying for Android using Flutter

I am trying to display google maps widget on my screen. The widget works flawlessly for iOS (See Figure 1), but only displays the google logo and a gray screen (See Figure 2) on the Android device and ...
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java.lang.NullPointerException at android.content.ContextWrapper.getPackageName

Hi guys , I am sending my current Latitude and Longitude from MainActivity to Another Class,but everytime the code is executed I get a Null Pointer Error. Here is my Main Activity : public ...
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16 views

How to improve ScrollView perfomance?

I have a scrollView that works very slow. Inside this ScrollView I have fragments with custom UI. I am adding fragments with FragmentTransactions. How can i improve ScrollView perfomance. I consider ...

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