Android :: Sample Code To Create Http Connection Using AsyncTask Class?
Feb 5, 2010I am trying to create HTTP connection using AsyncTask class.
Is it possible to create HTTP connection ?
Can you suggest sample source code?
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Android :: How To Create HTTP Request / How To Create Connection Object?
Jul 17, 2009How to create an HTTP request object of POST type in android? Which class need to be extend or what method need to implement? How to establish connection to a server? Actually i want to connect to a microsoft exchange server, and then i have to send a request to it using HTTP.
View 8 Replies View RelatedAndroid :: Create Http Connection To Retrieve Web Page Content
Aug 26, 2010How to create an Http Connection to retrieve a web page content to my android? Please post example code for this.
View 1 Replies View RelatedHow To Show Progress Bar On HTTP POST Using Asynctask
Oct 4, 2011I am trying to upload a video to an api and I was wondering how you show a progress bar show and also dismiss it when an upload has finished? Also, while were at it, do you see anything wrong with my pattern.compile for my edit boxes?
Code:
public class Loadvid extends AsyncTask <Object,Integer,String>{
EditText etxt_user = (EditText) findViewById(R.id.user_email);
EditText etxt_pass = (EditText) findViewById(R.id.friend_email);
[code]...
But it doesn't work. When i click on the button to send, it shows the handler for 2 seconds then brings up an error close.Error log.
Android :: Possible To Use AsyncTask In A Service Class?
May 1, 2010Everything is in the title.
On the official documentations it is stated that Note that services, like other application objects, run in the main thread of their hosting process and AsyncTask only works if it is executed in the UIThread.
So is it possible to use AsyncTask in a Service class? code...
Android :: External AsyncTask Class With ProgressDialog
Jul 27, 2010What I want is just to have the AsyncTaskTask showing a progressbar an external class. To do this I am passing the context as you can see in the main class. But whatever I try I get NullPointerException.
Working code examples.
Using Android 2.2 by the way.
main:
CODE:............
Update:
I have a follow up question: Using the above code, is it possible to return a value from the onPostExecute method back to the main class, somehow? (Sorry about beeing noobish)
I have tried something like this:
String result = new AsyncClass(this).execute();
and then a method that return back a string. But I can't do that because i got:
Type mismatch: cannot convert from AsyncTask<String,Void,Void> to String
AsyncTask Force Close Errors / HTTP Request To MySQL Database
Aug 22, 2012I'm trying to connect my app to a MySQL database to retrieve data. Obviously I have to do this in a new thread hence why I chose AsyncTask, something I'm new to.
I have included Toasts to tell me if there are problems when trying to carry out any part of it. However these toasts are not showing on the UI thread. I tested this out by turning off the server my SQL database is on so that it could trip the first toast. It didn't show it though and instead it gave me a force close error. When my server is running I have no issues and although I haven't coded the bit to retrieve data yet the code below does connect to my database and at least lets me view the page "CurrentSeasonDrivers".
Here is my code and the logcat showing the errors below that:
package com.android.history;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
[code]....
All I want it to do is show a toast if the application cannot connect to the server instead of force closing.
Android :: Call AsyncTask Methods From Another Class - Service - Callbacks?
Jun 1, 2010I was wondering if it's possible to call specific methods defined within the AsynTask class from another class and/or service ?
In my specific case I have a Service playing some sounds, but the sound is selected from a List with available sounds...
When a sounds is selected it is downloaded from my home server, this takes some time (not much, let's say around the 3-4 seconds, the sounds/effects aren't big in size)...
So my problem at the moment is that I have a service to play those sounds, and when I select one I wanted to show a progressdialog... The way (if I understood correctly) is to use an AsyncTask, but the only thing the AsyncTask will do is telling my Service to play a specific sound from my server... So there is no "callback" from the service to the Asynctask...
How can I call a running AsyncTask, which sits in another class, and tell him all work is done and thus he can stop showing the ProgressDialog ? Or am I over-engineering it and there are other ways ?
Android :: AsyncTask - Execute Code From Help Page
Jul 29, 2010I'm trying to execute code from Android's help page, but it doesn't work for me:
CODE:..........
When I execute task, doInBackground is invoked fine, but onPostExecute is never invoked. Tested on Milestone with 2.1 OS
Android :: Camera API Sample Code
Feb 17, 2009I tried google's camera API sample code. I found there are 2 problems: 1> It only can take picture in Landscape orientation 2> After click the space "key", the application crashes.
XML: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <SurfaceView android:id="@+id/surface" android:layout_width="fill_parent" android:layout_height="10dip" android:layout_weight="1"> </SurfaceView> </LinearLayout> Java code: /** * Copyright (c) 2007, Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License......
Android :: How To Compile Sample Code
May 20, 2010I'm breaking into GUI programming with android, trying to compile and analyze Lunar Lander sample program. The instructions for using Eclipse say to select "Create project from existing source" but that option doesn't exist. If I select File->New->Project I can select "Java project from Existing Ant Buildfile". Using that I've tried selecting various xml files as "Ant Buildfile" but all give me the "The file selected is not a valid Ant buildfile" error.I just want to run GUI sample projects, preferably with Eclipse. Any useful tips will be appreciated.
View 2 Replies View RelatedAndroid :: Create / Run AsyncTask In Service Without RunOnUiThread()?
Aug 12, 2010I have a Service that creates AsyncTasks for downloading files. In activities, we create Runnables or Threads that we pass to Activity.runOnUiThread(). I can't access that method from a service, so how do I use AsyncTask correctly, (do heavy work without blocking the UI Thread)?
View 1 Replies View RelatedAndroid :: Sample Code Of Getting Brightness From Droid?
Mar 20, 2009I want to use the system brightness in android,anybody can give me a sample code of getting the brightness from android.
View 18 Replies View RelatedAndroid :: Clear All Cookies / Sample Code To Do This?
Oct 27, 2010How can i clear all cookies?
could u give me a sample code to clear all cookies?
Android :: Sample Source Code For Beginner
Apr 7, 2009I'm trying to get my 1st android application (blackjack) going and am so confused with layouts button etc etc. Are there any sample source code for me to review? I have ran through the source that come with the SDK and the android source tree.Still pretty confused. am I stupid?
View 3 Replies View RelatedAndroid :: Sample Code In GPL3 Release
Oct 7, 2010I used some of the code from the Android sdk examples.Legally I know apache is compatible with GPL3 (license for my code), but what do I do about the copyright notice in the code?Do I keep the "Copyright (C) 2009 The Android Open Source Project" and apache license and just indicate the content was changed.Has anyone dealt with this? The Legal dept has no clue.
View 3 Replies View RelatedAndroid :: Sample Code For Image Upload
May 19, 2010In would like to write a simple Android application that takes a picture from the camera and uploads it to a webserver. Additionaly, I would like it to print in the screen the response from the server which is a simple text string.Do you know if there is any sample code that does something like that?
View 1 Replies View RelatedAndroid :: Sample Code To Handle Exceptions
Sep 27, 2010I am new to Android mobile application development.I would like to know , how can I handle the exception , like HttpConnection related exceptions or any other exceptions.Do I need to display an AlertDialog to the user.Kindly provide a sample code or project source code on how can I handle HttpConnection or similar type of Exceptions.
View 1 Replies View RelatedAndroid : Create The Layout Sample Like Settings
Sep 8, 2009How can i create layout style similar to settings in Andriod emulator? Example, in andriod T mobile, you can see, under settings, list of settings like Wireless control Call settings Sound & display Security & location etc are displayed ine by line accordingly with with brief description of each title provided with down arrows.
I would like to create to use in my application for list of items. But i cant find any tutorials similar to that display. I only found out like list view on the whole black background.
I just want to display like the settings display in emulator?
Android :: Sample Code / Application Stopped Unexpectedly
Nov 8, 2009The code seems no problem when I run it, but it stop unexpectedly in the emulator. I read some answer in the forum, It has to look at the logcat to see about the exception handler. But I do not really understand the logcat output. Please, developers, help me!. Below are the coding and my logcat output.
package com.example.testing; import android.app.Activity; import android.media.MediaPlayer; import android.os.Bundle; import android.util.Log; import android.widget.TextView; import android.widget.Toast; import com.example.testing.R;
public class testing extends Activity {
private static final String TAG = "MediaPlayerDemo";
private MediaPlayer mMediaPlayer;
private static final String MEDIA = "media";
private static final int LOCAL_AUDIO = 1;
private static final int STREAM_AUDIO = 2;
private static final int RESOURCES_AUDIO = 3;
private static final int LOCAL_VIDEO = 4;
private static final int STREAM_VIDEO = 5;
private String path;
private TextView tx;
@Override public void onCreate(Bundle icicle) {super.onCreate(icicle);
tx = new TextView(this);setContentView(tx);Bundle extras = getIntent().getExtras()
playAudio(extras.getInt(MEDIA));}
private void playAudio(Integer media)
{try {switch (media){case LOCAL_AUDIO:/**
* TODO: Set the path variable to a local audio file path.*/path = "/res/raw/test1";
if (path == "") {// Tell the user to provide an audio file URL.Toast.makeText(testing.this
"Please edit MediaPlayer_Audio Activity, "
+ "and set the path variable to your audio file path."
+ " Your audio file must be stored on sdcard.",Toast.LENGTH_LONG).show(); }
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setDataSource(path);
mMediaPlayer.prepare();
mMediaPlayer.start();
break;case RESOURCES_AUDIO:/**
* TODO: Upload a audio file to res/raw folder and provide
* its resid in MediaPlayer.create() method.*/
mMediaPlayer = MediaPlayer.create(this, R.raw.test1);
mMediaPlayer.start();}
tx.setText("Playing audio...");}
catch (Exception e) {Log.e(TAG, "error: " + e.getMessage(), e);}}
@Override protected void onDestroy() {super.onDestroy();
// TODO Auto-generated method stub if (mMediaPlayer != null) { mMediaPlayer.release();mMediaPlayer = null;}}}
LOGCAT OUTPUT 11-08 06:40:03.647: INFO/DEBUG(539): debuggerd: Jun 30 2009 17:00:51 11-08 06:40:03.659: INFO/vold(538): Android Volume Daemon version 2.0 11-08 06:40:03.678: ERROR/vold(538): Error opening switch name path '/ sys/class/switch/test2' (No such file or directory) 11-08 06:40:03.678: ERROR/vold(538): Error bootstrapping switch '/sys/ class/switch/test2' (m) 11-08 06:40:03.678: ERROR/vold(538): Error opening switch name path '/ sys/class/switch/test' (No such file or directory) 11-08 06:40:03.678: ERROR/vold(538): Error bootstrapping switch '/sys/ class/switch/test' (m) 11-08 06:40:03.678: DEBUG/vold(538): Bootstrapping complete 11-08 06:40:03.817: ERROR/flash_image(544): can't find recovery partition 11-08 06:40:03.918: DEBUG/qemud(546): entering main loop 11-08 06:40:04.588: DEBUG/AndroidRuntime(541): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<< 11-08 06:40:04.588: DEBUG/AndroidRuntime(541): CheckJNI is ON 11-08 06:40:04.828: DEBUG/qemud(546): fdhandler_accept_event: accepting on fd 10 11-08 06:40:04.828: DEBUG/qemud(546): created client 0xe078 listening on fd 8 11-08 06:40:04.828: DEBUG/qemud(546): fdhandler_event: disconnect on fd 8 11-08 06:40:04.877: DEBUG/qemud(546): fdhandler_accept_event: accepting on fd 10 11-08 06:40:04.877: DEBUG/qemud(546): created client 0xf028 listening on fd 8 11-08 06:40:04.877: DEBUG/qemud(546): client_fd_receive: attempting registration for service 'gsm' 11-08 06:40:04.877: DEBUG/qemud(546): client_fd_receive: -> received channel id 1 11-08 06:40:04.887: DEBUG/qemud(546): client_registration: registration succeeded for client 1 11-08 06:40:05.108: INFO/(542): ServiceManager: 0xac38 11-08 06:40:05.127: INFO/AudioFlinger(542): AudioFlinger's thread ready to run for output 0 11-08 06:40:05.147: INFO/CameraService(542): CameraService started: pid=542 11-08 06:40:05.207: DEBUG/AndroidRuntime(541): --- registering native functions --- 11-08 06:40:05.528: INFO/Zygote(541): Preloading classes... 11-08 06:40:05.538: DEBUG/dalvikvm(541): GC freed 764 objects / 42216 bytes in 10ms 11-08 06:40:05.717: DEBUG/dalvikvm(541): GC freed 278 objects / 17160 bytes in 4ms 11-08 06:40:05.897: DEBUG/dalvikvm(541): GC freed 208 objects / 12696 bytes in 5ms 11-08 06:40:05.967: DEBUG/dalvikvm(541): Trying to load lib /system/ lib/libmedia_jni.so 0x0 11-08 06:40:06.107: DEBUG/dalvikvm(541): Added shared lib /system/lib/ libmedia_jni.so 0x0 11-08 06:40:06.107: DEBUG/dalvikvm(541): Trying to load lib /system/ lib/libmedia_jni.so 0x0 11-08 06:40:06.107: DEBUG/dalvikvm(541): Shared lib '/system/lib/ libmedia_jni.so' already loaded in same CL 0x0 11-08 06:40:06.107: DEBUG/dalvikvm(541): Trying to load lib /system/ lib/libmedia_jni.so 0x0 11-08 06:40:06.107: DEBUG/dalvikvm(541): Shared lib '/system/lib/ libmedia_jni.so' already loaded in same CL 0x0 11-08 06:40:06.107: DEBUG/dalvikvm(541): Trying to load lib /system/ lib/libmedia_jni.so 0x0 11-08 06:40:06.107: DEBUG/dalvikvm(541): Shared lib '/system/lib/ libmedia_jni.so' already loaded in same CL 0x0 11-08 06:40:06.119: DEBUG/dalvikvm(541): GC freed 462 objects / 29144 bytes in 6ms 11-08 06:40:06.527: DEBUG/dalvikvm(541): GC freed 3584 objects / 171648 bytes in 17ms 11-08 06:40:07.699: DEBUG/dalvikvm(541): GC freed 11329 objects / 400856 bytes in 27ms 11-08 06:40:08.007: DEBUG/dalvikvm(541): GC freed 10472 objects / 438272 bytes in 28ms 11-08 06:40:08.327: DEBUG/dalvikvm(541): GC freed 10975 objects / 459800 bytes in 33ms 11-08 06:40:09.327: DEBUG/dalvikvm(541): GC freed 14372 objects / 506896 bytes in 36ms 11-08 06:40:09.658: DEBUG/dalvikvm(541): GC freed 11314 objects / 481360 bytes in 36ms 11-08 06:40:09.847: DEBUG/dalvikvm(541): GC freed 5928 objects / 248640 bytes in 30ms 11-08 06:40:10.027: DEBUG/dalvikvm(541): GC freed 349 objects / 37032 bytes in 24ms 11-08 06:40:10.228: DEBUG/dalvikvm(541): GC freed 778 objects / 48376 bytes in 33ms 11-08 06:40:10.327: DEBUG/dalvikvm(541): GC freed 321 objects / 37288 bytes in 34ms 11-08 06:40:10.757: DEBUG/dalvikvm(541): GC freed 477 objects / 29584 bytes in 34ms 11-08 06:40:10.788: DEBUG/dalvikvm(541): Trying to load lib /system/ lib/libwebcore.so 0x0 11-08 06:40:10.869: DEBUG/dalvikvm(541): Added shared lib /system/lib/ libwebcore.so 0x0 11-08 06:40:11.048: DEBUG/dalvikvm(541): GC freed 441 objects / 26224 bytes in 35ms 11-08 06:40:11.147: DEBUG/dalvikvm(541): GC freed 506 objects / 41464 bytes in 33ms 11-08 06:40:11.248: DEBUG/dalvikvm(541): GC freed 537 objects / 38832 bytes in 38ms 11-08 06:40:11.368: DEBUG/dalvikvm(541): GC freed 342 objects / 22552 bytes in 35ms 11-08 06:40:11.457: DEBUG/dalvikvm(541): GC freed 338 objects / 18736 bytes in 38ms 11-08 06:40:11.567: DEBUG/dalvikvm(541): GC freed 629 objects / 32136 bytes in 36ms 11-08 06:40:12.518: DEBUG/dalvikvm(541): GC freed 14257 objects / 497280 bytes in 57ms 11-08 06:40:12.868: DEBUG/dalvikvm(541): GC freed 11164 objects / 469576 bytes in 53ms 11-08 06:40:13.188: DEBUG/dalvikvm(541): GC freed 7134 objects / 311424 bytes in 55ms 11-08 06:40:13.357: DEBUG/dalvikvm(541): GC freed 752 objects / 43224 bytes in 41ms 11-08 06:40:13.449: DEBUG/dalvikvm(541): GC freed 598 objects / 31496 bytes in 43ms 11-08 06:40:13.558: DEBUG/dalvikvm(541): GC freed 413 objects / 26336 bytes in 43ms 11-08 06:40:13.597: INFO/Zygote(541): ...preloaded 1166 classes in 8066ms. 11-08 06:40:13.648: DEBUG/dalvikvm(541): GC freed 313 objects / 19952 bytes in 46ms 11-08 06:40:13.648: INFO/Zygote(541): Preloading resources... 11-08 06:40:13.707: DEBUG/dalvikvm(541): GC freed 54 objects / 11248 bytes in 43ms 11-08 06:40:14.118: DEBUG/dalvikvm(541): GC freed 337 objects / 15008 bytes in 46ms 11-08 06:40:14.338: DEBUG/dalvikvm(541): GC freed 280 objects / 11768 bytes in 44ms 11-08 06:40:14.368: INFO/Zygote(541): ...preloaded 48 resources in 712ms. 11-08 06:40:14.397: INFO/Zygote(541): ...preloaded 15 resources in 23ms. 11-08 06:40:14.448: DEBUG/dalvikvm(541): GC freed 117 objects / 8448 bytes in 50ms 11-08 06:40:14.498: DEBUG/dalvikvm(541): GC freed 205 objects / 8104 bytes in 45ms 11-08 06:40:14.557: DEBUG/dalvikvm(541): GC freed 36 objects / 1400 bytes in 53ms 11-08 06:40:14.567: INFO/dalvikvm(541): Splitting out new zygote heap 11-08 06:40:14.588: INFO/dalvikvm(541): System server process 569 has been created 11-08 06:40:14.597: INFO/Zygote(541): Accepting command socket connections 11-08 06:40:14.651: INFO/jdwp(569): received file descriptor 10 from ADB 11-08 06:40:14.727: WARN/System.err(569): Can't dispatch DDM chunk 4d505251: no handler...
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Android :: Bluetooth Developers Guide / Sample Code
Dec 18, 2009Bluetooth Developers, We have just published an Android Bluetooth Developers Guide, and a Sample Application. I hope these become a useful resource, Android Bluetooth Project Lead
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Can some one throw light on this?