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replicant-packages_apps_Email
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Convert Accounts activity to use AsyncTask

This commit is contained in:
Andrew Stadler 2009-06-10 15:53:02 -07:00
parent 68a9ccfcde
commit 13b92c618e
1 changed files with 44 additions and 14 deletions
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58
src/com/android/email/activity/Accounts.java
View File

@ -36,6 +36,7 @@ import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.KeyEvent;
@ -66,6 +67,9 @@ public class Accounts extends ListActivity implements OnItemClickListener, OnCli
private static final String ICICLE_SELECTED_ACCOUNT = "com.android.email.selectedAccount";
private EmailStore.Account mSelectedContextAccount;
ListView mListView;
LoadAccountsTask mAsyncTask;
/**
* Support for list adapter
*/
@ -94,26 +98,17 @@ public class Accounts extends ListActivity implements OnItemClickListener, OnCli
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.accounts);
ListView listView = getListView();
listView.setOnItemClickListener(this);
listView.setItemsCanFocus(false);
listView.setEmptyView(findViewById(R.id.empty));
mListView = getListView();
mListView.setOnItemClickListener(this);
mListView.setItemsCanFocus(false);
findViewById(R.id.add_new_account).setOnClickListener(this);
registerForContextMenu(listView);
registerForContextMenu(mListView);
if (icicle != null && icicle.containsKey(ICICLE_SELECTED_ACCOUNT)) {
mSelectedContextAccount = (Account) icicle.getParcelable(ICICLE_SELECTED_ACCOUNT);
}
// TODO: lightweight projection with only those columns needed for this display
// TODO: query outside of UI thread
Cursor c = this.managedQuery(
EmailStore.Account.CONTENT_URI,
EmailStore.Account.CONTENT_PROJECTION,
null, null);
AccountsAdapter a = new AccountsAdapter(this,
R.layout.accounts_item, c, sFromColumns, sToIds);
listView.setAdapter(a);
mAsyncTask = (LoadAccountsTask) new LoadAccountsTask().execute();
}
@Override
@ -133,6 +128,41 @@ public class Accounts extends ListActivity implements OnItemClickListener, OnCli
notifMgr.cancel(1);
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mAsyncTask != null && mAsyncTask.getStatus() != LoadAccountsTask.Status.FINISHED) {
mAsyncTask.cancel(true);
mAsyncTask = null;
}
}
/**
* Async task to handle the cursor query out of the UI thread
*/
private class LoadAccountsTask extends AsyncTask<Void, Void, Cursor> {
@Override
protected Cursor doInBackground(Void... params) {
return Accounts.this.managedQuery(
EmailStore.Account.CONTENT_URI,
EmailStore.Account.CONTENT_PROJECTION,
null, null);
}
@Override
protected void onPostExecute(Cursor theCursor) {
AccountsAdapter adapter = new AccountsAdapter(Accounts.this,
R.layout.accounts_item, theCursor, sFromColumns, sToIds);
mListView.setAdapter(adapter);
// This is deferred until after the first fetch, so it won't flicker
// while we're waiting to find out if we have any accounts
mListView.setEmptyView(findViewById(R.id.empty));
}
}
private void onAddNewAccount() {
AccountSetupBasics.actionNewAccount(this);
}