android

问题 The common examples for okhttp cover the scenarios of get and post. But I need to get the file size of a file with a url. Since I need to inform the the user, and only after getting their approval to download the file. Currently I am using this code URL url = new URL("http://server.com/file.mp3"); URLConnection urlConnection = url.openConnection(); urlConnection.connect(); int file_size = urlConnection.getContentLength(); mentioned in this stackoverflow question How to know the size of a file

问题 The common examples for okhttp cover the scenarios of get and post. But I need to get the file size of a file with a url. Since I need to inform the the user, and only after getting their approval to download the file. Currently I am using this code URL url = new URL("http://server.com/file.mp3"); URLConnection urlConnection = url.openConnection(); urlConnection.connect(); int file_size = urlConnection.getContentLength(); mentioned in this stackoverflow question How to know the size of a file

问题 I have created authentication with google on first time start up of app and I have my own _authenticatedUser which stores user token for further requests. final FirebaseAuth firebaseAuth = FirebaseAuth.instance; final GoogleSignIn googleSignIn = GoogleSignIn(); Future<String> signInGoogle() async { GoogleSignInAccount googleSignInAccount = await googleSignIn.signIn(); GoogleSignInAuthentication gsa = await googleSignInAccount.authentication; FirebaseUser user = await firebaseAuth

问题 I have created authentication with google on first time start up of app and I have my own _authenticatedUser which stores user token for further requests. final FirebaseAuth firebaseAuth = FirebaseAuth.instance; final GoogleSignIn googleSignIn = GoogleSignIn(); Future<String> signInGoogle() async { GoogleSignInAccount googleSignInAccount = await googleSignIn.signIn(); GoogleSignInAuthentication gsa = await googleSignInAccount.authentication; FirebaseUser user = await firebaseAuth

问题 I have a wave file in 16bit PCM form. I've got the raw data in a byte[] and a method for extracting samples, and I need them in float format, i.e. a float[] to do a Fourier Transform. Here's my code, does this look right? I'm working on Android so javax.sound.sampled etc. is not available. private static short getSample(byte[] buffer, int position) { return (short) (((buffer[position + 1] & 0xff) << 8) | (buffer[position] & 0xff)); } ... float[] samples = new float[samplesLength]; for (int i

问题 I'm working on an app that has two activities, Main and Info. The App is started with the MainActivity and when you click a button the InfoActivity slides in from the right side. When you click another button, InfoActivity shall slide out to the right side again and Main returns. This is how I implemented the Animation and the Button Click in MainActivity: buttonInfo.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent i = new Intent(getApplicationContext(),

问题 I'm working on an app that has two activities, Main and Info. The App is started with the MainActivity and when you click a button the InfoActivity slides in from the right side. When you click another button, InfoActivity shall slide out to the right side again and Main returns. This is how I implemented the Animation and the Button Click in MainActivity: buttonInfo.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent i = new Intent(getApplicationContext(),

问题 I'm trying to upload a complex object to a WCF webservice using KSoap2 Android and having some difficulty doing this. I have achieved successful calls to the webservice when I use SoapUI and fill in the data by hand. The successful SoapUI-generated request is as follows: <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tem="http://tempuri.org/" xmlns:fpm="http://schemas.datacontract.org/2004/07/FPMobileServices"> <soapenv:Header/> <soapenv:Body> <tem:CommitOne

问题 I'm trying to upload a complex object to a WCF webservice using KSoap2 Android and having some difficulty doing this. I have achieved successful calls to the webservice when I use SoapUI and fill in the data by hand. The successful SoapUI-generated request is as follows: <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tem="http://tempuri.org/" xmlns:fpm="http://schemas.datacontract.org/2004/07/FPMobileServices"> <soapenv:Header/> <soapenv:Body> <tem:CommitOne

问题 I am using MPAndroidChart library for my project. Is it possible to rotate the labels of the XAxis by 270 degrees so that I can fit more text? 回答1: Original answer: Unfortunately it is currently not possible to rotate the values on the x-axis of a chart to a certain degree / angle. You will have to implement such a feature yourself. UPDATE: As of v2.1.5 this feature is now available: XAxis xAxis = chart.getXAxis(); xAxis.setLabelRotationAngle(...); 回答2: do it simply by XAxis xAxis=barChart