Android :: Posting Toast From Worker To UI Thread
Aug 8, 2010
I was trying to post a toast notification in case something goes wrong in a worker thread. I do this by putting a handler.post(funcFailed) in the catch block where funcFailed it a runnable and simply called a function funcFailedshow()
funcFailedshow() is defined to be Toast.makeText(App.this,"Error in funcfailed", Toast.LENGTH_LONG).show();
For some reason i cannot see the toast notification. Even if i replace App.this (app is the applications name) with a getApplicationContext() it does not work.
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Nov 17, 2010
My application launches a thread to query the web for some data. I want to display a Toast message when nothing is found, but my application always crashes. I've tried using the application Context from within the thread, like so: Toast.makeText(getApplicationContext(), "testttt", Toast.LENGTH_LONG).show(); I've also tried creating a Runnable with the Toast call and calling runOnUiThread(runnable) from the Thread (the Toast call in this runnable uses the Activity as the first parameter). Does anyone have any ideas on how to accomplish this?
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Aug 28, 2009
I am seeing some weird issues and looking to see if anyone knows what is going on. I have a BroadcastReceiver which updates some views on receiving an event. Some psudo code is shown below. What happens is the function runs fine and the app seems to update the textviews BUT when i then try to clear the textviews parent and add new textviews the linearlayout(parent) blanks out and will now draw any of it's children.
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Jul 20, 2009
My app forwards MotionEvents, reported by GestureDetector.OnGestureListener, to a worker thread. Right now i am doing it by calling MotionEvent.obtain, pass the obtained copy to the worker thread, handle it and recycle it at the worker thread. Is it required to obtain and recycle a MotionEvent if it is passed to another thread? Or could it safely be skiped? If i am making things overly complicated, could you please explain me at which conditions MotionEvent.obtain is usually called?
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May 26, 2009
I'm implementing a service that contains a thread to handle all time consuming operation. My core service logic is in a different thread than the ui or main thread. According to the Android document, when the OS plans to free some system resource, it will call onDestroy () on the service and only when onDestroy() returns it will kill the process hosting the service, thus giving opportunity to the service to cleanup.Now, when onDestroy() is called, I want to send a message to my service thread to do the necessary cleanup. Only when the service thread acknowledges that the cleanup or shutdown is complete, onDestroy () should return. I could find a way to send asynchronous messages to threads and the corresponding processing of the messages, but not able to figure out how I need to implement onDestroy(), such that it would send a message to the service thread and should wait for a result, before returning.
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Oct 17, 2010
package com.commonsware.android.threads;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
public class HandlerDemo extends Activity {
Thread mBackground; ProgressBar bar;
Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
bar.incrementProgressBy(5);
} }; boolean isRunning = false;
@Override
public void onCreate(Bundle icicle) { super.onCreate(icicle);
setContentView(R.layout.main); bar = (ProgressBar) findViewById(R.id.progress);
} public void onStart() { super.onStart(); bar.setProgress(0);
mBackground = new Thread(new Runnable() { public void run() { try { int a = 0;
for (int i = 0; i < 20 && isRunning; i++) { for (int j = 0; j < 2000; j++) {
for (int k = 0; k < 1000; k++) { a++;
} } handler.sendMessage(handler.obtainMessage());
} } catch (Throwable t) { // just end the background thread } } } );
findViewById(R.id.LoginButton).setOnClickListener(
new OnClickListener() { public void onClick(View v) { mBackground.run();
} } );
isRunning = true;
} public void onStop() { super.onStop();
isRunning = false;
} }
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Aug 28, 2010
My user hits a button and kicks off a process that takes 3 steps in about 10 seconds total. I'd like to pop up Toast messages "Step 1", "Step 2", "Step 3", "Finished!" as the process progresses. I'm using the standard Java Thread interface to run the process in a thread and I've found that trying to pop up Toast from the thread causes an FC. What is the best way to report this kind of progress - step by step messages?
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Nov 16, 2010
I want to cancel a Toast to show the next one. This is the description of the behavious I want, when I select one element in the menu i display a toast from the actuel menu element, but if i switch from one element to an other quickly i'm creating a list of Toast to display. So i need to cancel the previous one but i never succed. This is an extract of my code: public class MainActivity extends TabActivity
private Toast toast; private String toastMsg;
private void toast(){ if(toast!=null){ toast.cancel(); } toast = Toast.makeText(MainActivity.this, toastMsg,Toast.LENGTH_SHORT);
toast.show(); } }
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Feb 8, 2010
When using setDuration for a Toast is it possible to set a custom length or at least something longer than Toast.LENGTH_LONG?
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Jun 24, 2009
I have a service running in the background.I have a background thread that gets a reference to the service from the application's main activity. But when the background thread calls a method in the service to display a toast, I get the "Looper not initialized exception".Why,if I have a valid, bound reference to a Service, does this still happen?
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Sep 7, 2010
How can I implement a run() method of thread if I create a Thread Global?
I mean If I create a Thread Globally then can I implement its run() method {" public void run()"} anywhere in my Application?
In the run() method I have to write the code to perform some action.
IF I can do it then please can anyone show me briefly how to do it particularly.
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May 21, 2009
I am writing an application in which i need to handle messages between the main thread(the deafult UI related thread) and the user created Gamethread.
The requirement is like this.
An activity(say "Activity_X") is setting the view by "setContentView(some "View_Y")". In "Activity_X" i have implemeted "onCreateOptionsMenu()" and "onOptionsItemSelected()" fucntions for creating menus & a switch case for action to be taken on selecting those menus.Menu has items like "resume/pause/zoom/" .
All action to be take on selecting these menus are implemented in "View_Y" in a separate Gamethread by extending "Thread" class.
So whenever a menu is selected in "Activity_X" i need to send a message to "View_Y". And on receiving this ,a particular action/method should be called in View_Y(GameThread).
How can i achieve this using Handlers?Is there any other way of doing this? Please do share with me some code snippets for these.
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May 27, 2010
I have a separate thread running to get data from the internet. After that, I would like to update the ListView in the main thread by calling adapter.notifyDataSetChanged(). But it does not work. Any workaround for that?
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Jul 22, 2009
I want to do the drawing in another thread to speed up the game(it is way to slow right now). I was told to do this but don't quite understand why that would speed things up. Is it GameView that should implement Runnable? Should I make the thread sleep when not drawing? where should I start the thread? package com.android.WWS;
import android.app.Activity; import android.content.Context; import android.graphics.*; import android.os.Bundle; import android.view.SurfaceView; import android.view.KeyEvent; import android.view.View; import android.view.View.OnKeyListener; import java.lang.Runnable; import java.lang.Thread;...................
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Feb 2, 2010
I want to form an xml and post it. Can anybody tell me how to form an xml in android.
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Jun 9, 2010
I want to post my free version of the APK on my website so people can test it out without going through android market.I am using a third party web host site (windows based server).I tried <a href="freeapp.apk">, it doesn't work.I did some search and all I found was using Apache server to do that. Is there a way to host this apk on a windows server? What the html should look like? Where can I find more information about it?
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Aug 5, 2010
I am working on an Android app where we enter some text in edit box and all I want to do is simply send the text which typed (i.e. edittext.gettext()) to Facebook as my status. The important thing is I don't want a Facebook dialog box to pop up, instead ,just send the message as status without a dialog box. Is there any way I could post without a dialog box?
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Apr 19, 2010
I am currently using C:Geo on my phone for my Geocaching needs and am happy with its performance. I am also a user of Foursquare with Facebook and like to update where I am because I like to try new places. Along these lines I was thinking it would also be nice to share caches I have found with my friends, plus raise their awareness of Geocaching at the same time, by being able to have a found Geocache posted to facebook at the time it is marked found in the program. Has anyone heard of an Android app that would do this? If not have you heard of anyone developing one? If so I would definitely support such an app.
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Apr 22, 2009
I have a login oage which i hve to post with soem user details like user name , passwords, and some hidden values. i need to submit the response page aftr login (its an I agree) to make an API request . I want to do all thse things through code which needs to consider evry aspcts as we are doing the same using browser. I submited the first login page using code and got the resonse page. on submiting the I agree page I m redirected to a some other page.it seems the cookie is not handled while submiting the second page or may be some redirects or so.
The same is working well if i make the request through browser
The code I used is as follows
CODE:.............
THIS RESPONSE IS NOT CORRECT AS I EXPECTED.....
If any ppl cannot figure out a solution, whether we can load url in the browser class of android so tht we can get all the data in the browser and can use the methods associated with the browser.
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Feb 20, 2009
I need to suspend/resume a thread from another thread in the same process. I tried to look into thread apis,but I couldn't figured out a way to achieve this.Can anyone pls point me some references to look or give a tip to do this.
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Nov 22, 2010
I've got an issue when trying posting on my facebook wall from an application developed on an Android phone. Here's the problem: Sometimes different "strange" error message appear like "error with HelloIdahoFalls.com" or "HelloSiouxCity.com" or "HolyPlanets Connect" and so on. I really don't know why these sites appear on my error log. Seems like my Android KeyHash is in conflict with some of this sites. The strange thing is that sometimes my application works and posts correctly on my wall.
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Dec 9, 2012
I have been searching a lot to find a way to do this. But nothing seems to be working for me.
This is my image button for facebook status post:
This is my mainactivity.java file's corresponding part:
[HIGH]public class MainActivity extends FacebookActivity {
private static final String APP_ID = "XXXXXXXXXXXXXXX";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
[code]....
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Oct 31, 2010
Using ACTION_SEND it's possible to post messages to various sharing services such as gmail, facebook, twitter, etc. Most services have reasonably long message lengths, but twitter in particular is very short (140 characters).
Not knowing in advance which service a user is going to select once the Intent.createChooser() dialog appears, is there a way to construct an intent that will result in a short message for twitter but a longer message for other services?
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Jul 22, 2010
I have a problem in posting a message on friends wall in facebook. I write below code for posting a message.
private void postwall(){ try { FBRequest streamRequest = FBRequest.requestWithDelegate(new FBRequestDelegateImpl());
Map<String, String> parameters = new HashMap<String, String>();
frdlist = new String[list.size()]; for(int j=0;j < list.size();j++){
if (list.get(j).isChecked()) { frdlist[j]=String.valueOf(list.get(j).getUserid());
parameters.put("message", "HI.... its a test application of Dates Near Me");
parameters.put("attachment", "{"name":"Facebook Connect for Android","href":"http://code.google.com/p/fbconnect-android/","caption":"Caption","description":"De scr iption","media":[{"type":"image","src":"http://img40.yfrog.com/img40/5914/iphoneconnectbtn.jpg","href":"http://developers.facebook.com/connect.php?tab=iphone/"}],"properties":{"anotherlink":{"text":"Fac eb ook homepage","href":"http://www.facebook.com"}}}");
parameters.put("auto_publish" ,"true");
parameters.put("target_id" ,frdlist[j]);
parameters.put("uid" ,String.valueOf(FBSession.getSession().getUid()));
streamRequest.call("stream.publish", parameters);
} } } catch (Exception e) {
// TODO Auto-generated catch block e.printStackTrace();
} }
I am passing three values: message,target_id and uid. All values I get perfectly. But when I check my friends wall that time message is not display on wall.
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Dec 28, 2009
Does anyone know how to delete certain texts from a thread in an easy manner instead of having to delete a whole thread??
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Jan 28, 2010
I want to press an Android button and automatically direct the user to the PayPal site with all the relevant data POSTED along also.Is this possible?
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Nov 19, 2010
Where to find complete tutorial for posting twitter status from android?
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Jul 16, 2010
The Android doc says "Like activities and the other components, services run in the main thread of the application process." Is the main thread here the same thing as UI thread?
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Jan 13, 2010
I'm building an android app which should perform a GET on my site to get two cookies and then perform a post to the same site with these cookies.
As mentioned I start of with the GET and I'm using org.apache.http.client.HttpClient to perform this operation.
CODE:..............
So far so good. Don't mind the requiredCookies line yet, it will be used in the Java.net impl since I can't get the HttpClient one to work =(.
Let's take a look at the non working HttpClient Post part.
CODE:............
What happens now is that I perform a POST with the localContext where the cookies are stored. This doesn't work. I get a HTTP/1.1 401 No session. Since I had no luck with this I tried another approach(java.net.HttpURLConnection). Remember I still use the same GET part
CODE:.............
And VIOLA a 200 is displayed and everything works like a charm.
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Aug 22, 2010
Is there a way you can tag someone when you post a pic on facebook on the Evo? I am not able to figure it out. Does anyone know how to go about that?
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