I want to display pictures into an ImageSwitcher and change image every 3 seconds. I instanciate a Thread that call the setImageURI(URI) and I schedule it every 3 seconds. It does not update the view and I don't know how to do it. If I call the same code that call the setImageURI() from the OnClickListener of the view it works! Do you know why and how can I make it work?
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I tried to show a picture in local file system in a imageswitcher. But I could see nothing but a black screen in fact.
Here is my code:
CODE:..............
When I debugged it, it showed me the message "resolveUri failed on bad bitmap uri: file:///data/data/com.Android.Hust.PoliceMap/app_c/2.jpg".
How to solve this problem and show my picture in the Emulator?
My program threw a NullPointerException the other day when it tried to use a Handler created on another thread to send that thread a message. The Handler created by the other thread was not yet created, or not yet visible to the calling thread, despite the calling thread having already called start on the other thread. This only happens very rarely. Almost every test run does not get the exception. I was wondering what the best way is to avoid this problem for sure with minimal complication and performance penalty. The program is a game and very performance sensitive, especially once it is running. Therefore I try to avoid using synchronization after setup, for example, and would prefer to avoid spinning on a variable at any time.
View 2 Replies View RelatedI have two activities:
"a" that spawns thread for generating a dynamic array of values inside public void run() function.
"b", graphics activity that will help me draw rectangular pulses based on array values calculated in activity "a" (calculated in a's thread to be precise).
When I am in thread inside "a", how do I pass values of array to activity "b" and
call activity as well.
activity A
CODE:..........
activity B
CODE:..............
Suppose I have code in the onStart() handler of my Service to launch a thread to do some stuff and then call stopSelf().stopSelf() gets called before the thread finishes.What exactly happens?I've tested this out myself and my thread continues to execute until it is finished.Does Android hear the stopSelf() call, but postpone it until the thread is finished?
View 1 Replies View RelatedHi, I've noticed that on android, the call to pthread_join does not suspend the calling thread. I've a number (6) of new thread created using pthread_create and pthread_join is called on each thread. But It does not suspend the main (calling) thread. I believe this relates to the port of pthread lib to android.
View 2 Replies View RelatedI am using an Executor [fixed thread pool] with my own ThreadFactory that adds a Looper:
CODE:...............
I am running a thread that makes network requests but if the network fails I would like a dialog message to be displayed to the user. This process is rather involving since it requires making AND displaying the request in the UI thread. I can wait for the user's response to the dialog by simply adding a Loop to the network thread and wait for a message to be send from the UI thread. This allows me to encapsulate the network requests in a while(tryAgain) thread. All works well except when the Looper.loop() method is called the second time (after a second network error dialog is displayed) and a message is sent by the dialog (in the UI thread) to the network thread's handler:
CODE:.............
In the AlertDialog instance is an OnClickListener:
CODE:...............
I've checked that the thread is still active with handler.getLooper().getThread().isAlive() which always returns true but it still gives me "sending message to a Handler on a dead thread". How is it that the Message/Handler has decided that the thread is dead? Shouldn't it rely on the .isAlive() method? In the end I am trying to avoid replicating the thread management build into the Android OS .
I wish to do the Image Switcher's Touch Event. That is when i touch it, it should wake up the zoom controls. After zoomed in, the image can able the touch scroll on the image up and down. how to do it? Is there any default zoom controls? If not, tell me your suggestion, idea and also valuable links about this? make a note the Target version is android 1.6.
View 1 Replies View RelatedI tried :
CODE:.............
But i diden't see nothing [simply a void button]
I'm using ImageView.setImageURI() to render an image that has been previously downloaded from the Internet. It works fine, but I haven't understood whether the call is blocking or not. In my code, I've implemented a background thread to download the bits, in the meantime a placeholder is rendered, and as soon as a download is complete, setImageURI() is called. This approach is used both for a Gallery with thumbnails and for a single, large rendered with ImageView. The thing is working, but I see that the application freezes for a while when a download has been completed and setImageURI() is called. Which make me wonders whether I'm using it properly.
For the record, I know that the images I'm downloading are larger than I need (at least initially); that is, they are much larger than the thumbnail and the large viewer. Since images, once downloaded, are stored locally forever, I should probably create some smaller-size previews in background and then pass them to Gallery and ImageView? Would that make the UI really more responsive?
I'm having a problem with setImageURI on my ImageView objects. I was using setimageResource(R.drawable.x), which was working fine, but now I'm trying to change over to using URIs so that I can be more flexible about my image source (not constrained to pre-packaged images).
I'm using ImageView.setImageURI(uri), where uri is (for example android.resource://com.example.hellogridview/2130837520, which I created by doing Uri.pars ("android.resource:// com.example.hellogridview/" + R.drawable.x). I took this method from my MediaPlayer, where I created URIs for R.raw wav files from this path.
It's not throwing any errors that I can see, but it's just displaying blank images. The images are ~150px each way and I'm displaying them about half size - would that cause a problem?
I have a very small activity that must show an image.
If picture is not very small (for example 1.12 Mb 2560x1920) it produces out of memory on change screen orientation. I tried getDrawable.setCallback(null) but no luck.
CODE:...................
I am displaying images and some text in a list view with an adapter. The images are pulled from the web, then cached locally and displayed. The images are already small (60px square), and I know their size, so I'm using the advice from here suggesting I use setImageURI instead of decoding the bitmap. The class that does the work is a modified version of Fedor's ImageLoader
The code attaches a stub drawable to the ImageView until the desired image is downloaded from the web, then loads the cached file from the sdcard. In Android 2.2 this works just fine. It's fast, and I don't get OOM crashes. On 2.1, though, I get the following error:
CODE:...............
The ImageLoader class is as follows:
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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.
CODE:.....................
I am running into a very weird thing. I have an ImageView, and when I call setImageURI with an image, it seems to change the size of the image view.
CODE:..............
The default image is 195 x 195, i am trying to set the image to be 200 x 200, after setting the image using setImageURI, i get the dimensions back and it says it's 48 x 48.
I have tried a bunch of different android:scaleType parameters, and I couldn't find anything that worked.
I also tried explicitly setting the size (layout_width="200px") and it seems to work.
I have a view that I am drawing to a bitmap, saving to disk and then putting in an ImageView via setImageURI. However, when the image is displayed in the ImageView it is not being shown at the correct size. It is about 1/3 smaller than it should be. I'm guessing that this is a density issue, but I can't figure out what's going wrong (my emulator is WVGA).
View 2 Replies View RelatedIs related to: http://stackoverflow.com/questions/2307374/need-suggetsion-about-a-mixed-uri-int-id-images-ambient
My problem is:
CODE:......................
Does NOT work. why?
I know that
CODE:........................
work.
But that does NOT solve my problem. because I want to set the image with an uri independenty if this come from a resource or come from the camera ACTION_PICK intent...
Can you make an ImageView load an image from a remote server through the ImageView.setImageURI(URI uri) method?
View 2 Replies View RelatedHow 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.
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.
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?
View 1 Replies View RelatedI 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;...................
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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View 7 Replies View RelatedThe 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?
View 3 Replies View RelatedStatus: ROOT ,,Root Notification Thread (Root Achieved and thread open)
View 49 Replies View RelatedI am currently working on an application in android where I need to call the Web Service. I am working in Android and I don't have an idea about how to call a web Service in Android.So, can anybody please help me out in how to call a Web Service in Android Programming.
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View 4 Replies View RelatedI want to develop an application containing video call, but I didn't find the interface in Android about video call. So I wonder whether Android has this API in fact, if anyone know it, please tell me.
View 2 Replies View RelatedI have a TabActivity subclass that attempts to start a new activity via a menu item selection in onOptionsItemSelected.I am receiving the following exception which eludes me at the moment.I'm not sure why it thinks I am *not* in an activity!
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