android-asynctask

问题 I am try to create a application that will update the weather of multiple cities .Each row will have diffrent temp so i have use a AsynkTask. But i am not able to update the UI after getting the response from the API. My Main Activity public class MainActivity extends Activity { LinearLayout depart_arrivals_details; LayoutInflater inflater; TextView depart_time, depart_airport_city, depart_airport, arrival_time, arrival_airport_city, arrival_airport, pnr_number,temprature,humidity; ImageView

问题 I haven't dealt with SQLite databases before last week. I last dealt with SQL many years ago, but I still have the gist of it. The code below reads 140,000 words from an asset named dictionary.dic and inserts each into a SQLite database along with its status . My expectation was that it would take a good while, but it's been like 25 minutes on a 7" tablet and still not near finished (on P ). Should I say, "Hey, it's 1/7 of a million rows. It's gonna take awhile." But I can read all 140,000

问题 I haven't dealt with SQLite databases before last week. I last dealt with SQL many years ago, but I still have the gist of it. The code below reads 140,000 words from an asset named dictionary.dic and inserts each into a SQLite database along with its status . My expectation was that it would take a good while, but it's been like 25 minutes on a 7" tablet and still not near finished (on P ). Should I say, "Hey, it's 1/7 of a million rows. It's gonna take awhile." But I can read all 140,000

问题 In IOS we use blocks when we want to handle an action when a particular situation occur . Is there a way like this in android to handle situation onCompletion and we can add where ever it is. Like AsyncTask methods it knows when work is finish . it executes onPostExecute. How we can create this type of method when a particular situation reach and we handle it like . Today i find a way which behave like Blocks in IOS BaseAsyncTask(new Callback(){ onPostResult(string result) { // do whatever

问题 Good day Stack, i'm working on an Android project that uses Android's Room 1.0.0 Alpha 5, the main issue that i'm facing is that every time i need to call one of the DAO from room i need to do something like this: Activity.java: ... AppDatabase db = Room.databaseBuilder(context, AppDatabase.class, "Storage").build(); Table1 table = new Table1(); table.setId(1); table.setName("Hello"); new AccessDB().execute(1); /* Generic AccessDB needed */ private class AccessDB extends AsyncTask<Integer

问题 Good day Stack, i'm working on an Android project that uses Android's Room 1.0.0 Alpha 5, the main issue that i'm facing is that every time i need to call one of the DAO from room i need to do something like this: Activity.java: ... AppDatabase db = Room.databaseBuilder(context, AppDatabase.class, "Storage").build(); Table1 table = new Table1(); table.setId(1); table.setName("Hello"); new AccessDB().execute(1); /* Generic AccessDB needed */ private class AccessDB extends AsyncTask<Integer

问题 Good day Stack, i'm working on an Android project that uses Android's Room 1.0.0 Alpha 5, the main issue that i'm facing is that every time i need to call one of the DAO from room i need to do something like this: Activity.java: ... AppDatabase db = Room.databaseBuilder(context, AppDatabase.class, "Storage").build(); Table1 table = new Table1(); table.setId(1); table.setName("Hello"); new AccessDB().execute(1); /* Generic AccessDB needed */ private class AccessDB extends AsyncTask<Integer

问题 I'm new to Android and Java. I have been working on my task i.e, Image Downloader. Where I have to download images with progress bar and display them in grid. I have created two classes 1. URLImageAdapter 2. CacheActivity. Everything works fine but download begins before I click on download button and when I click on download button the progress bar appears and progress till hundred vanishes but still downloading is on. I want to synchronize downloading images and progress bar. Code Below.

问题 I'm new to Android and Java. I have been working on my task i.e, Image Downloader. Where I have to download images with progress bar and display them in grid. I have created two classes 1. URLImageAdapter 2. CacheActivity. Everything works fine but download begins before I click on download button and when I click on download button the progress bar appears and progress till hundred vanishes but still downloading is on. I want to synchronize downloading images and progress bar. Code Below.

问题 I'a using a asynctask to download file. It works normally until i turn off wifi connection (there are no other internet connection) of my android, download dialog still and no changes. When i check by log, i discover that function read() of inputstream is non stop. So how to check this case? here is my code: URL url = new URL(this.url); URLConnection connection = url.openConnection(); connection.setReadTimeout(1000); connection.connect(); // this will be useful so that you can show a typical