android-handler

问题 The question is, where I tell my Thread to use mHandler for the Looper ? Thank you. I am using the below code: class LooperThread extends Thread { public Handler mHandler; public void run() { Looper.prepare(); mHandler = new Handler() { public void handleMessage(Message msg) { // process incoming messages here } }; Looper.loop(); } } 回答1: The question is, where I tell my Thread to use mHandler for the Looper? You don't need to tell it explicitly, because the system (framework) does it for you

问题 I have a service that runs in a separate process. The service spawns a new thread in onCreate() method. This thread sends messages back to the service. If I start the app manually everything works fine - messages are received by the Handler in my service. But in my test handleMessage() method is never get called. How can I fix my test to make handleMessage() method work? Thanks! Service: public class MyService extends Service { private ServiceHandler mHandler; private final int MSG_HELLO

问题 I want make an app that call a function for example every 10 sec. I wrote my code like this: Handler ha=new Handler(); ha.postDelayed(new Runnable() { @Override public void run() { //call function } }, 10000); But my function call just one time in 10 sec after compile this code. How can I fix it? 回答1: Do it like this: final Handler ha=new Handler(); ha.postDelayed(new Runnable() { @Override public void run() { //call function ha.postDelayed(this, 10000); } }, 10000); 回答2: Use a combination of

问题 I want to achieve a marker animation such as GIF animation. I got two images which should be blinking simultaneously. I found nothing which can acheive this in android. I am trying to do is , creating a handler which run every 1 second , and I am trying to set icon for marker. But it doesnt work. Please guide me in right direction. my code as of now is as follows. Handler handler = new Handler(); Boolean marker_color_bool = true; //adding marker and sending the marker instance to marker

问题 I want to achieve a marker animation such as GIF animation. I got two images which should be blinking simultaneously. I found nothing which can acheive this in android. I am trying to do is , creating a handler which run every 1 second , and I am trying to set icon for marker. But it doesnt work. Please guide me in right direction. my code as of now is as follows. Handler handler = new Handler(); Boolean marker_color_bool = true; //adding marker and sending the marker instance to marker

问题 There is a service that listens for some voice. If voice matches a string a certain method is invoked in the service object. public class SpeechActivationService extends Service { public static Intent makeStartServiceIntent(Context pContext){ return new Intent(pContext, SpeechActivationService.class); } //... public void onMatch(){ Log.d(TAG, "voice matches word"); } //... } This is how I start the service in my activity: Intent i = SpeechActivationService.makeStartServiceIntent(this);

问题 I am trying to use a Handler in my app. But when i instantiate it like this: Handler handler = new Handler(); I get the following error. Gradle: error: Handler is abstract; cannot be instantiated And when i check the solutions, it asks me to implement these methods: Handler handler = new Handler() { @Override public void close() { } @Override public void flush() { } @Override public void publish(LogRecord record) { } }; I have never used Handlers before and i am using it just to call a method

问题 When I need something to run asynchronously , such as a long running task or a logic that uses the network, or for whatever reason, Starting a new Thread and running it works fine. Creating a Handler and running it works as well. What's the difference? When should I use each one? What are the advantages / reasons to use a Handler and not a Thread ? PS. - For this question's sake, let's ignore AsyncTask . - Handler().postDelayed use case is clear to me, for this question's sake let's assume I

问题 I want to set up a HandlerThread from the GUI thread. Then some time later, when a button is clicked on the GUI, it runs callHello(), which then send a message to a HelloLogger object residing on the non-GUI thread which asynchronously logs "Hello World". I have tried a number of things, some block indefinitely, some never receive the message, etc etc. The code below is more or less as close as I have got, please could someone modify it to work? public class HandlerThreadExample { private

问题 I need to update my UI from an external Thread . I can't use runOnUiThread, because it's an application using StandOut libraries. So I created my Handler in the class containing methods to update the UI: private final class UIHandler extends Handler { public static final int DISPLAY_UI_TOAST = 0; private static final int LOAD_PROFILE = 1; public UIHandler(Looper looper) { super(looper); } @Override public void handleMessage(Message msg) { switch (msg.what) { case UIHandler.DISPLAY_UI_TOAST: {