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POChanging adapter values in Gridview cause an exception
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  1. POChanging adapter values in Gridview cause an exception
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    copied!<p>I am using a Gridview to show some TextViews in the inside. I have created a clear button that set a new Adapter with empty ArrayList and it works fine. When I tried to perform the same operation in another place, an exception happen. I have tracked all my code till I have pointed out the statement that cause the problem.</p> <p>Declairing the gridview at the first of the class</p> <pre><code>GridView gridView; </code></pre> <p>Got a reference in OnCreate method</p> <pre><code>gridView = (GridView) findViewById(R.id.gridView1); </code></pre> <p>Creating the adpater</p> <pre><code>String[] arrayEmpty = new String[] {"", "", "", "", "", "", "", "", ""}; ArrayList&lt;String&gt; list = new ArrayList&lt;String&gt;(Arrays.asList(arrayEmpty)); gridView.setAdapter(new ArrayAdapter&lt;String&gt;(this,R.layout.list_item,list));//list_item is acustomized layout for the TextView </code></pre> <p>What I am doing in Clear() method and works fine:</p> <pre><code>gridView.setAdapter(new ArrayAdapter&lt;String&gt;(MainActivity.this,R.layout.list_item,listEmpty)); </code></pre> <p>What I am doing to set the values and DOES NOT WORK:</p> <pre><code> ArrayList&lt;String&gt; gridList= new ArrayList&lt;String&gt;(); for(int i=0;i&lt;3;i++){ for(int j=0;j&lt;3;j++){ gridList.add(String.valueOf(e[i][j].getValue())); } } //The next statement cause an Exception..Why!!? gridView.setAdapter(new ArrayAdapter&lt;String&gt;(MainActivity.this,R.layout.list_item,gridList)); class solveTask extends AsyncTask&lt;Object, Void, String&gt; { @Override protected void onPreExecute() { ProgressDialog pd = new ProgressDialog(MainActivity.this); pd.setProgress(ProgressDialog.STYLE_SPINNER); pd.setMessage("Solving, please wait a few seconds..."); pd.setIndeterminate(true); pd.setCancelable(false); pd.show(); } @Override protected String doInBackground(Object... parametros) { MainActivity.this.runOnUiThread(new Runnable() { public void run() { fillSudoku(); solve(); } }); return null; } @Override protected void onPostExecute(String result) { //update progressDialog here pd.dismiss(); } } </code></pre> <p>Some of the Log:</p> <blockquote> <p>04-27 10:24:04.556: W/dalvikvm(7823): threadid=9: thread exiting with uncaught exception (group=0x40015560) 04-27 10:24:04.586: E/AndroidRuntime(7823): FATAL EXCEPTION: AsyncTask #1 04-27 10:24:04.586: E/AndroidRuntime(7823): java.lang.RuntimeException: An error occured while executing doInBackground() 04-27 10:24:04.586: E/AndroidRuntime(7823): at android.os.AsyncTask$3.done(AsyncTask.java:200) 04-27 10:24:04.586: E/AndroidRuntime(7823): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274) 04-27 10:24:04.586: E/AndroidRuntime(7823): at java.util.concurrent.FutureTask.setException(FutureTask.java:125) 04-27 10:24:04.586: E/AndroidRuntime(7823): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308) 04-27 10:24:04.586: E/AndroidRuntime(7823): at java.util.concurrent.FutureTask.run(FutureTask.java:138) 04-27 10:24:04.586: E/AndroidRuntime(7823): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 04-27 10:24:04.586: E/AndroidRuntime(7823): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 04-27 10:24:04.586: E/AndroidRuntime(7823): at java.lang.Thread.run(Thread.java:1019) 04-27 10:24:04.586: E/AndroidRuntime(7823): Caused by: java.lang.UnsupportedOperationException: removeAllViews() is not supported in AdapterView 04-27 10:24:04.586: E/AndroidRuntime(7823): at android.widget.AdapterView.removeAllViews(AdapterView.java:511) 04-27 10:24:04.586: E/AndroidRuntime(7823): at com.etaworx.thesudokusolver.MainActivity.printSudoku(MainActivity.java:481) 04-27 10:24:04.586: E/AndroidRuntime(7823): at com.etaworx.thesudokusolver.MainActivity.solve(MainActivity.java:579) 04-27 10:24:04.586: E/AndroidRuntime(7823): at com.etaworx.thesudokusolver.MainActivity$solveTask.doInBackground(MainActivity.java:625) 04-27 10:24:04.586: E/AndroidRuntime(7823): at com.etaworx.thesudokusolver.MainActivity$solveTask.doInBackground(MainActivity.java:1) 04-27 10:24:04.586: E/AndroidRuntime(7823): at android.os.AsyncTask$2.call(AsyncTask.java:185) 04-27 10:24:04.586: E/AndroidRuntime(7823): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 04-27 10:24:04.586: E/AndroidRuntime(7823): ... 4 more 04-27 10:24:09.849: E/WindowManager(7823): Activity com.etaworx.thesudokusolver.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4054e258 that was originally added here 04-27 10:24:09.849: E/WindowManager(7823): android.view.WindowLeaked: Activity com.etaworx.thesudokusolver.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4054e258 that was originally added here 04-27 10:24:09.849: E/WindowManager(7823): at android.view.ViewRoot.(ViewRoot.java:258) 04-27 10:24:09.849: E/WindowManager(7823): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148) 04-27 10:24:09.849: E/WindowManager(7823): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 04-27 10:24:09.849: E/WindowManager(7823): at android.view.Window$LocalWindowManager.addView(Window.java:424) 04-27 10:24:09.849: E/WindowManager(7823): at android.app.Dialog.show(Dialog.java:241) 04-27 10:24:09.849: E/WindowManager(7823): at com.etaworx.thesudokusolver.MainActivity.showLoading(MainActivity.java:570) 04-27 10:24:09.849: E/WindowManager(7823): at com.etaworx.thesudokusolver.MainActivity$2.onClick(MainActivity.java:77) 04-27 10:24:09.849: E/WindowManager(7823): at android.view.View.performClick(View.java:2485) 04-27 10:24:09.849: E/WindowManager(7823): at android.view.View$PerformClick.run(View.java:9080) 04-27 10:24:09.849: E/WindowManager(7823): at android.os.Handler.handleCallback(Handler.java:587) 04-27 10:24:09.849: E/WindowManager(7823): at android.os.Handler.dispatchMessage(Handler.java:92) 04-27 10:24:09.849: E/WindowManager(7823): at android.os.Looper.loop(Looper.java:123) 04-27 10:24:09.849: E/WindowManager(7823): at android.app.ActivityThread.main(ActivityThread.java:3683) 04-27 10:24:09.849: E/WindowManager(7823): at java.lang.reflect.Method.invokeNative(Native Method) 04-27 10:24:09.849: E/WindowManager(7823): at java.lang.reflect.Method.invoke(Method.java:507) 04-27 10:24:09.849: E/WindowManager(7823): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 04-27 10:24:09.849: E/WindowManager(7823): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 04-27 10:24:09.849: E/WindowManager(7823): at dalvik.system.NativeStart.main(Native Method)</p> </blockquote>
 

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