android-studio

问题 I'd like to create a directory in a Download directory (the one which stores all the files I download from web) so I can see it in browser after I plug the mobile into my PC. File myDirectory = new File(dir, "NewDirectory"); What should be the value of dir? 回答1: File dir = new File(Environment.getExternalStorageDirectory() + "/Download/your folder/"); dir.mkdirs(); // creates needed dirs Don't forget to ask for permissions on Marshmallow or newer and to add the write storage permission to

问题 I get the informtion 'It is recommended to migrate to PKCS12 which is an industry standard format using "keytool -importkeystore -srckeystore -destkeystore -deststoretype pkcs12" ' when I try to 'Generate Signed Bundle / APK ...' I get the error "Given final block not properly padded. Such issues can arise if a bad key is used during decryption." after I update my keystore to PKCS12 based the artical. Now I hope to give up PKCS12, can I still use JKS keystore to publish app to Google Play

问题 Good day to all. I'm following the teacher's notes and am ready to run the app in android studio 3.6.1. The emulator runs fine but when I open the app I get a white screen. At the bottom of the android windows, I see the following error. Emulator: emulator: INFO: QtLogger.cpp:68: Critical: Uncaught TypeError: Cannot read property 'update' of undefined (qrc:/html/js/location-mock-web-channel.js:130, (null)) I have searched this website and google for the problem. I'm trying to figure out if

问题 I have a probleme with flutter. I install Android Studio and configure that for flutter (install flutter and Dart) but I can't run my app on any device and android studio console returned: Unable to locate a development device; please run 'flutter doctor' for information about installing additional components. and flutter doctor -v : [✓] Flutter (Channel beta, v0.8.2, on Linux, locale en_US.UTF-8) • Flutter version 0.8.2 at /home/mostafa/Dev/Flutter/flutter • Framework revision 5ab9e70727 (4

问题 I am running Manjaro 17.0.1 I have an issue running android studio . When I run ./studio.sh I have: A graphical error message from Android Studio saying No JDK found. Please validate either STUDIO_JDK, JDK_HOME or JAVA_HOME environment variable points to valid JDK installation A console error message which: no java in (/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl) /usr/bin/dirname: missing operand Try '/usr/bin/dirname --help' for more

问题 This question already has answers here : Android Studio 4.1 Plugin Error: Plugin * is incompatible (supported only in IntelliJ IDEA) (13 answers) Closed last month . Since upgrading to AS 4.1 from 4.0 I get the event log message Plugin Error: Plugin "Install Apk" is incompatible (supported only in IntelliJ IDEA). on starting AS. Yes, this is like a previous report1, but this appears to be a bundled plugin. I don't think it's anything I've added, nor can I find anything obviously out of place

问题 This question already has answers here : How to get a resource id with a known resource name? (10 answers) Closed 4 years ago . I want create a country and flag picker. I want to set an image of a flag, but i want to choose that image based on it's name. BAscially I am trying to create a flag and ISD code picker for android so that I can use it for adding ISD code before the phone numbers user. ImageView img1 = (ImageView)findViewById(R.id.imgFlag); img1.setBackgroundResource(R.drawable.India

问题 I have the first intent, it starts the second intent. In the second intent, I get the values, and pass the value to the first content and close the second content. How can I do it? 回答1: You can directly pass parameters to the intent when you create it. If you need to pass objects you need to implement Parcelable interface on the object you pass: Intent i = new Intent(MyActivity.this, SecondActivity.class); MyData j = new MyData(); i.putExtra("MyParameter", "Something"); i.putExtra("MyData", j

问题 I am trying to use Drawer activity , seems that it has 3 files to just show simple text as This is home Fragment :| Anyway, I have tracked back all those files and found fragment_home.xml , HomeFragment.kt and HomeViewModel.kt Question How should I call for API data trough fragments? Code my code Based on android studio documentation this is the code that I should use in order to get my api data. val textView = findViewById<TextView>(R.id.TextView) // Instantiate the RequestQueue. val queue =

问题 I'm trying to upload an image file and get the image download URL using this code private void UploadImage() { String storageFileName = System.currentTimeMillis() + ".jpg"; // Time is used to ensure unique file name FireBase_File = FireBase_Storage.child(storageFileName); FireBase_File.putFile(UriBitmap).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() { @Override public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) { if(task.isSuccessful()) { FireBase