android-handler

I am trying to display a multiplication table with delay. My code is working fine but I am not able to implement the delay. Here is My code: tableButton1 = (Button) findViewById(R.id.Button1); tableButton1.setOnClickListener(new OnClickListener() { public void onClick(View v) { new Thread(new Runnable() { public void run() { str = tableButton1.getText().toString(); a = Integer.parseInt(str); StringBuilder sb = new StringBuilder(); for (int i = 1; i <= 10; i++){ sb.append(a + " x " + i + " = " + i * a+ "\n"); } s = String.valueOf(sb); Intent intent=new Intent(getApplicationContext()

My app is composed of a single Activity . In this activity, I'm creating multiple HandlerThread s which run in a loop to do socket blocking operations. Currently I post a quit message to everyone of these HandlerThread s during my Activity.onDestroy() . Sometimes, when I open my app, close it and relaunch it, it crashes (many time due to posting a message to a handler thread which is not running). My question is: What is the right way to close HandlerThread when I close my app? (Note that those threads might be blocking on a socket operation). EDIT: More information: I have a pool of Handler

I use the code below for getting some work done everytime after some time interval, and using post delay in 'finally' clause and oustide of runnable. Here is the code. Runnable runnable = new Runnable() { @Override public void run() { try { // do somthing } catch (Exception e) { // TODO: handle exception } finally { handler.postDelayed(this, 60000); } } }; handler.postDelayed(runnable, 60000); handler.postDelayed(runnable, 60000); will run two times or a single time. it depends! first matter how the each try / catch / finally block completes normally or abruptly? the finally block "always ^ "

I am trying to display received messages using custom adapter on list view , until now everything is working fine , but when I press back and come back and launch this activity again , only message send works but received messages cannot be displayed on the list view. Steps I have done so far : Use debugger to find out if message is not empty, messages are received and not empty. Use debugger inside receives() function , it turns out on first launch of activity looper.loop() function gives control back to main thread but next time on activity resume this loops doesn't seem to end (may be this

Java code: private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { // code here } }; How to convert this java code to Kotlin? I tried this: private val mHandler = object : Handler() { fun handleMessage(msg: Message) { // code here } } But this is seems to be incorrect and gives a compile time error on object Problem: The syntax to override handleMessage() method of the Handler class is incorrect. Solution: Add override keyword before the function that you want to override. private val mHandler = object : Handler() { override fun handleMessage(msg:

Could someone explain me different situations to use AlarmManager vs Handler with examples please. Any disadvantages of using these two as alternate to each other? Thanks. They have little to do with one another. I am assuming you are referring to using something like postDelayed() on Handler for polling, which is but one small feature of Handler . You would use postDelayed() (also available on any widget or other subclass of View ) in an activity for simple timing events that are within the activity itself. You would use AlarmManager for periodic background operations, much like you would use

Is a Handler a Thread or not? If yes, how can we update the UI from this Handler(thread)? If we use the Looper concept, it may be possible. In this case, does it apply to any threads? I am very much confused about these Threads, Handlers and Loopers. Could anyone please explain them with an example? Is a Handler a Thread or not? If yes, how can we update the UI from this Handler(thread). If we use the Looper concept, it may be possible, in this case does it apply to any threads? I am very much confused about this Thread, Handler and Looper. Could anyone please explain them with an example? The