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POAsyncTask download image errors
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copied!<p>I use Google Chart API to build chart's in my app. </p> <p>In my case I need to download image on each chart. I use AsyncTask for this.</p> <p>To monitor download procces I use Progress dialog. But got a errors in this class of AsyncTask.</p> <p>execute of AsyncTask:</p> <pre><code>new loadChart(ChartAct.this,img).execute(); </code></pre> <p>and code of AsyncTask:</p> <pre><code>public class loadChart extends AsyncTask<Void, Void, Void> { private ImageView img; private Context con; private ProgressDialog dialog; public loadChart(Context context, ImageView img1) { this.img = img1; this.con = context; } @Override protected void onPreExecute() { dialog = ProgressDialog.show(con, "Connecting:", "Loading. Please wait...", true); super.onPreExecute(); } @Override protected Void doInBackground(Void... params) { final Bitmap bitmap = DownloadImage(); img.setImageBitmap(bitmap); return null; } @Override protected void onPostExecute(Void result) { dialog.dismiss(); super.onPostExecute(result); } private static InputStream OpenHttpConnection(String urlString) throws IOException { Log.d("palval", "OpenHttpConnection"); InputStream in = null; int response = -1; URL url = new URL(urlString); URLConnection conn = url.openConnection(); if (!(conn instanceof HttpURLConnection)) throw new IOException("Not an HTTP connection"); try { HttpURLConnection httpConn = (HttpURLConnection) conn; httpConn.setAllowUserInteraction(false); httpConn.setInstanceFollowRedirects(true); httpConn.setRequestMethod("GET"); httpConn.connect(); response = httpConn.getResponseCode(); if (response == HttpURLConnection.HTTP_OK) { in = httpConn.getInputStream(); } String res = Integer.toString(response); } catch (Exception ex) { throw new IOException("Error connecting"); } return in; } public static Bitmap DownloadImage() { Log.d("palval", "DownloadImage"); Bitmap bitmap = null; InputStream in = null; try { in = OpenHttpConnection("https://chart.googleapis.com/chart?chs=440x220&chd=t:60,40&cht=p3&chl=Hello|World"); bitmap = BitmapFactory.decodeStream(in); in.close(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } return bitmap; } } </code></pre> <p>errors:</p> <pre><code>09-06 18:35:35.574: E/AndroidRuntime(2502): FATAL EXCEPTION: AsyncTask #1 09-06 18:35:35.574: E/AndroidRuntime(2502): java.lang.RuntimeException: An error occured while executing doInBackground() 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.os.AsyncTask$3.done(AsyncTask.java:278) 09-06 18:35:35.574: E/AndroidRuntime(2502): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 09-06 18:35:35.574: E/AndroidRuntime(2502): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 09-06 18:35:35.574: E/AndroidRuntime(2502): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 09-06 18:35:35.574: E/AndroidRuntime(2502): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208) 09-06 18:35:35.574: E/AndroidRuntime(2502): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 09-06 18:35:35.574: E/AndroidRuntime(2502): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 09-06 18:35:35.574: E/AndroidRuntime(2502): at java.lang.Thread.run(Thread.java:864) 09-06 18:35:35.574: E/AndroidRuntime(2502): Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4132) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:723) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.view.View.requestLayout(View.java:12957) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.view.View.requestLayout(View.java:12957) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.view.View.requestLayout(View.java:12957) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.view.View.requestLayout(View.java:12957) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.view.View.requestLayout(View.java:12957) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.widget.ImageView.setImageDrawable(ImageView.java:362) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.widget.ImageView.setImageBitmap(ImageView.java:377) 09-06 18:35:35.574: E/AndroidRuntime(2502): at com.example.headache.loadChart.doInBackground(loadChart.java:37) 09-06 18:35:35.574: E/AndroidRuntime(2502): at com.example.headache.loadChart.doInBackground(loadChart.java:1) 09-06 18:35:35.574: E/AndroidRuntime(2502): at android.os.AsyncTask$2.call(AsyncTask.java:264) 09-06 18:35:35.574: E/AndroidRuntime(2502): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 09-06 18:35:35.574: E/AndroidRuntime(2502): ... 5 more 09-06 18:35:36.055: E/WindowManager(2502): Activity com.example.headache.ChartAct has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@40dd3b28 that was originally added here 09-06 18:35:36.055: E/WindowManager(2502): android.view.WindowLeaked: Activity com.example.headache.ChartAct has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@40dd3b28 that was originally added here 09-06 18:35:36.055: E/WindowManager(2502): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:352) 09-06 18:35:36.055: E/WindowManager(2502): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:373) 09-06 18:35:36.055: E/WindowManager(2502): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:321) 09-06 18:35:36.055: E/WindowManager(2502): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:152) 09-06 18:35:36.055: E/WindowManager(2502): at android.view.Window$LocalWindowManager.addView(Window.java:541) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.Dialog.show(Dialog.java:301) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.ProgressDialog.show(ProgressDialog.java:116) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.ProgressDialog.show(ProgressDialog.java:99) 09-06 18:35:36.055: E/WindowManager(2502): at com.example.headache.loadChart.onPreExecute(loadChart.java:29) 09-06 18:35:36.055: E/WindowManager(2502): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:561) 09-06 18:35:36.055: E/WindowManager(2502): at android.os.AsyncTask.execute(AsyncTask.java:511) 09-06 18:35:36.055: E/WindowManager(2502): at com.example.headache.ChartAct.onCreate(ChartAct.java:31) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.Activity.performCreate(Activity.java:4531) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1071) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2150) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2229) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.ActivityThread.access$600(ActivityThread.java:139) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1261) 09-06 18:35:36.055: E/WindowManager(2502): at android.os.Handler.dispatchMessage(Handler.java:99) 09-06 18:35:36.055: E/WindowManager(2502): at android.os.Looper.loop(Looper.java:154) 09-06 18:35:36.055: E/WindowManager(2502): at android.app.ActivityThread.main(ActivityThread.java:4945) 09-06 18:35:36.055: E/WindowManager(2502): at java.lang.reflect.Method.invokeNative(Native Method) 09-06 18:35:36.055: E/WindowManager(2502): at java.lang.reflect.Method.invoke(Method.java:511) 09-06 18:35:36.055: E/WindowManager(2502): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 09-06 18:35:36.055: E/WindowManager(2502): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 09-06 18:35:36.055: E/WindowManager(2502): at dalvik.system.NativeStart.main(Native Method) </code></pre>

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