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POCustom Adapter Listview Android
 

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  1. POCustom Adapter Listview Android
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    <p>I hit my head against the wall, trying to solve this problem for some time. I'm not an experienced Android guy, so its solution might be really simple. That being said, I have the following code:</p> <pre><code> @Override protected void onCreate(Bundle savedInstanceState) { setContentView(R.layout.adminusers); super.onCreate(savedInstanceState); // set user_type for Viewall mUserType = 0; lv_adminusersListContent.addFooterView(footerView); mUsersAdapter = new AdminUsersAdapter(mUsersList, AdminUsers.this); lv_adminusersListContent.setAdapter(mUsersAdapter); getUsersList(); } private void getUsersList() { if (UsefulFcts.isOnline(AdminUsers.this)) { if (mThread != null &amp;&amp; mThread.isAlive()) { mThread.interrupt(); } mThread = new Thread() { @Override public void run() { mHandler.post(new Runnable() { @Override public void run() { pDialog = new ProgressDialog(AdminUsers.this); pDialog.setMessage("Loading.. Please wait!"); pDialog.setCancelable(false); pDialog.show(); } }); mUsersList.clear(); mUsersList.addAll(mServiceManager.getUsersList(mUserType, 0 + "", AdminServiceManager.sHowManyToLoad)); mArrayLength = mUsersList.size(); Log.d("arrayLength", String.valueOf(mArrayLength)); Log.d("total_results", String.valueOf(ParserJSON.total_results)); mHandler.post(new Runnable() { @Override public void run() { // refresh listview mUsersAdapter.notifyDataSetChanged(); if (mArrayLength &lt; ParserJSON.total_results) { lv_adminusersListContent .addFooterView(footerView); } else if (mArrayLength &gt;= ParserJSON.total_results) { lv_adminusersListContent .removeFooterView(footerView); } if (0 == mArrayLength) { Toast.makeText(AdminUsers.this, "No username found!", Toast.LENGTH_SHORT).show(); } pDialog.dismiss(); } }); } }; mThread.start(); } else { Toast.makeText(AdminUsers.this, "Internet connection required!", Toast.LENGTH_LONG).show(); } } @Override protected void linkUI() { // begin load_more view footerView = AdminUsers.this.getLayoutInflater().inflate( R.layout.loadmore, null); btn_loadmore = (Button) footerView.findViewById(R.id.btn_loadmore); // end load_more view btn_adminusersViewall = (Button) findViewById(R.id.btn_adminusersViewall); btn_adminusersAdmins = (Button) findViewById(R.id.btn_adminusersAdmins); btn_adminusersClients = (Button) findViewById(R.id.btn_adminusersClients); btn_adminusersDevs = (Button) findViewById(R.id.btn_adminusersDevs); btn_adminAdd = (ImageButton) findViewById(R.id.btn_adminAdd); lv_adminusersListContent = (ListView) findViewById(R.id.lv_adminusersListContent); } @Override protected void setAction() { // begin Buttons UnderHeader btn_adminusersViewall.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { UsefulFcts.setButtonClicked(btn_adminusersViewall, btn_adminusersClients, btn_adminusersAdmins, btn_adminusersDevs); mUserType = 0; mArrayLength = -1; lv_adminusersListContent.removeFooterView(footerView); getUsersList(); } }); btn_adminusersClients.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { UsefulFcts.setButtonClicked(btn_adminusersClients, btn_adminusersDevs, btn_adminusersAdmins, btn_adminusersViewall); mUserType = 1; mArrayLength = -1; // view.setVisibility(View.GONE); getUsersList(); } }); btn_adminusersDevs.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { UsefulFcts.setButtonClicked(btn_adminusersDevs, btn_adminusersClients, btn_adminusersAdmins, btn_adminusersViewall); mUserType = 2; mArrayLength = -1; lv_adminusersListContent.removeFooterView(footerView); getUsersList(); } }); btn_adminusersAdmins.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mUserType = 3; mArrayLength = -1; lv_adminusersListContent.removeFooterView(footerView); getUsersList(); } }); // end Buttons UnderHeader btn_loadmore.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mThread2 = new Thread() { @Override public void run() { mHandler.post(new Runnable() { @Override public void run() { progressBar = new ProgressDialog( AdminUsers.this); progressBar .setMessage("Loading more projects.. "); progressBar.setCancelable(true); progressBar.show(); } }); mUsersList.addAll(mServiceManager.getUsersList( mUserType, String.valueOf(mArrayLength), AdminServiceManager.sHowManyToLoad)); mArrayLength = mUsersList.size(); mHandler.post(new Runnable() { @Override public void run() { mUsersAdapter.notifyDataSetChanged(); if (mArrayLength &gt;= ParserJSON.total_results) { lv_adminusersListContent.removeFooterView(footerView); } progressBar.dismiss(); } }); }; }; mThread2.start(); } }); </code></pre> <p>Note: I basically have a listview which content is requested from a server depending on which button (looking like a tab) I'm pressing (mUserType = 0/1/2/3). I also use a Load More button (footerView = simple layout with a button). Everything seems to work just fine, but after "playing" with the buttons a few times (random number!) it crashes, with the following exception thrown:</p> <pre><code>02-21 11:00:49.252: E/AndroidRuntime(11728): java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131296461, class android.widget.ListView) with Adapter(class android.widget.HeaderViewListAdapter)] </code></pre> <p>So, I looked back at the code, but couldn't see any "not on UI thread" listview notification. </p> <p><strong>1.</strong> What could the problem be?</p> <p><strong>2.</strong> Is it necessary to use 2 threads (mThread and mThread2), or could I use the same one, as one's work should start when the other ends (or isn't it ?) and should I declare them static or not ?</p> <p>Also pointing me to any "Good practices" tricks I could use in the future, or "Wrong practices" that I did would be much appreciated!</p> <p>PS. linkUI() and setAction() are called in super().onCreate().</p>
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