android-version

I need to clear(equivalent to Clear Data in App Settings ) all the old data in the app programmatically when the user updates the app from Google Play Store or any other sources. This is because I don't need any of the existing data from the old app since I have changed everything in the new app compared to the old one. I thought of implementing a version check at the app startup, but I can't find a way to get the app's previous versionCode or versionName . The only way I figured out to clear the data is to check the lastUpdateTime at the time of publishing the app. But it's not reliable since

How to generate an Barcode and convert it to Bitmap using new Google Vision API? Barcode barcode = new Barcode(); Barcode.Email email = new Barcode.Email(); email.address = "my_email@gmail.com"; email.subject = "My Subject; email.body = "My body content."; barcode.email = email; //Implement conversion Bitmap barcodeImage = barcodeToBitmap(barcode);// I do know this part. You can detect your barcodes using Google Vision API and then use ZXing to generate the barcodes. You could try something like this, it uses zxing library: public static Bitmap getBitmap(String barcode, int barcodeType, int

a) What does the Android bundle version and version code denote? b) What is the difference between the bundle version and version code? i) Suppose I have a bundle version of 0.137 , how does the version code relate to this? Can the version code just be 137? ii) What happens when I release bundle version 1.0 next? Can I just call the version code 10 ? c) How do they relate? What's the right way to number the bundle versions? N.B. There does not seem to be a source that explains the difference, in search. I have been very haphazardly numbering my bundles till now, but I'd like to figure out how

I'm building a custom camera application for Android. The Camera.Parameters API contains methods like setPreviewSize or setPictureSize , that are working well. But I am trying to use setJpegQuality(int) parameter: Camera cam = getCameraInstance(); if(cam == null){ setResult(INSTANCE_ERROR); finish(); } params = cam.getParameters(); params.setJpegQuality(jpegQuality); cam.setParameters(params); I am testing my application on 3 different devices : an HTC Desire Z, a Galaxy S2 and a Galaxy S4. setJpegQuality is working on HTC (Android 2.2.1 ) and on Galaxy S2 ( 4.1.2 ), but fails on Galaxy S4

I'm not new to Android and I'm well used to the version handling and how to condition it, but when I see this it troubles me... // Check if we're running on Android 5.0 or higher if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { // Call some material design APIs here } else { // Implement this feature without material design } On any device pre lollipop this line would crash the app because the Build.VERSION_CODES.LOLLIPOP field does not exists... so why is this in the recommended solution in the documentation? I'm really wondering what am I missing? Well, you must compile your

I have a DialogFragment that handles login and fingerprint authentication for my application. This fragment uses two classes that are exclusive to API 23, KeyGenParameterSpec and KeyPermanentlyInvalidatedException . I had been under the impression that I could use these classes, as long as I check the build version before I try to initialize the classes (outlined here ): if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { ... } else { ... } But it appears that this is not the case. If I try to run this code on a version prior to API 20, the Dalvik VM rejects the entire class and throws a

is it possible to show widget in "Add to home screen > Widgets" Dialog only for a certain android version without uploading two APKs and assigning to proper SDK version numbers? I have a way to do it without any code e.g.: In your res\values dir create a bools.xml file: <?xml version="1.0" encoding="utf-8"?> <resources> <bool name="honeycombOrAbove">false</bool> </resources> Create a values-v11 dir (for honeycomb or above values), copy the file to it and set the value to true. Then in the manifest for the widget receiver use: android:enabled="@bool/honeycombOrAbove". I also used it in the