Basically, I'm working on a app which has a tab-activity including 4 tabs and also I'm using the actvityGroup to manage the activities and backKey pressed() method.
When my app first starts it sends a request to server and shows the progress bar (using AsyncTask) as shown in below image.
After this, my complete UI appears as
it loads new actvity on click event of button "GO" (code is given below)
btnGo.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent bookSearchResultActivityIntent = new Intent();
bookSearchResultActivityIntent
.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
bookSearchResultActivityIntent.setClass(getParent(),
BookSearchResultActivity.class);
bookSearchResultActivityIntent.putExtra("LANG", language);
bookSearchResultActivityIntent.putExtra("SEARCH_KEYWORDS",
edTxt_SearchField.getText().toString());
MyActivityGroup activityStack = (MyActivityGroup) getParent();
activityStack.push("BooksSearchActivity",
bookSearchResultActivityIntent);
also here is my ActivtyGroup.java code
public class MyActivityGroup extends ActivityGroup {
private Stack<String> stack;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (stack == null) {
stack = new Stack<String>();
}
push("1stStackActivity", new Intent(this, Home.class));
}
@Override
public void finishFromChild(Activity child) {
pop();
}
@Override
public void onBackPressed() {
pop();
}
public void push(String id, Intent intent) {
Window window = getLocalActivityManager().startActivity(id,
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
if (window != null) {
stack.push(id);
setContentView(window.getDecorView());
}
}
public void pop() {
if (stack.size() == 1) {
finish();
}
LocalActivityManager manager = getLocalActivityManager();
manager.destroyActivity(stack.pop(), true);
if (stack.size() > 0) {
Intent lastIntent = manager.getActivity(stack.peek()).getIntent()
.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
Window newWindow = manager.startActivity(stack.peek(), lastIntent);
setContentView(newWindow.getDecorView());
}
}
}
ok now my question is that when i press the backKey(); it should come to the previous actvity.
while starting the activity
but not working yet.
and here is the code of my Home tab(which sends the request to server in onCreate method)
public class Home extends Activity {
/** Called when the activity is first created. */
static final String URL = "http://www.shiaislamiclibrary.com/requesthandler.ashx";
static final String KEY_ITEM = "Book"; // parent node
static final String KEY_BOOKAUTHOR = "BookAuthor";
static final String KEY_BOOKDATEPUBLISHED = "DatePublished";
static final String KEY_BOOKTITLE = "BookTitle";
static final String KEY_BOOKCODE = "BookCode";
static final String KEY_BOOKIMAGE = "BookImage";
String searchLang;
String searchKeywords;
LayoutInflater inflater = null;
ArrayList<String> BookTitle = new ArrayList<String>();
ArrayList<String> BookCoverPhotos = new ArrayList<String>();
ArrayList<String> BookAuther = new ArrayList<String>();
ArrayList<String> BookPublishDate = new ArrayList<String>();
ArrayList<String> ImageByte = new ArrayList<String>();
ArrayList<Bitmap> bitmapArray = new ArrayList<Bitmap>();
Context ctx = this;
Activity act = this;
Context context = Home.this;
URL bookImageURL = null;
Bitmap bitMapImage = null;
Button btnGo;
Spinner spnrLanguage;
Spinner spnrBrowseBy;
String language;
EditText edTxt_SearchField;
GridView gridView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.home_activity);
View viewToLoad = LayoutInflater.from(this.getParent()).inflate(
R.layout.home_activity, null);
this.setContentView(viewToLoad);
gridView = (GridView) findViewById(R.id.gridview);
spnrLanguage = (Spinner) findViewById(R.id.spnrLanguage);
spnrBrowseBy = (Spinner) findViewById(R.id.spnrBrowseBy);
edTxt_SearchField = (EditText) findViewById(R.id.EditTxt_Search);
btnGo = (Button) findViewById(R.id.btn_GO);
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
// checking for availbe internet Connection
if (cm.getActiveNetworkInfo() != null
&& cm.getActiveNetworkInfo().isAvailable()
&& cm.getActiveNetworkInfo().isConnected()) {
new UIThread().execute(URL, "Imam Ali");
}
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int pos,
long arg3) {
Toast.makeText(context, BookTitle.get(pos), Toast.LENGTH_SHORT)
.show();
Intent bookSearchResultActivityIntent = new Intent();
bookSearchResultActivityIntent.setClass(getParent(),
BookOverView.class);
bookSearchResultActivityIntent.putExtra("BITMAP",
bitmapArray.get(pos));
bookSearchResultActivityIntent.putExtra("BOOK_TITLE",
BookTitle.get(pos));
bookSearchResultActivityIntent.putExtra("BOOK_AUTHOR",
BookAuther.get(pos));
bookSearchResultActivityIntent.putExtra("BOOK_PUBLISH_DATE",
BookPublishDate.get(pos));
MyActivityGroup activityStack = (MyActivityGroup) getParent();
activityStack.push("BookOverViewActivity",
bookSearchResultActivityIntent);
}
});
// //////////////////// Spinners handler/////////////////////////
ArrayAdapter<String> adapterLanguage = new ArrayAdapter<String>(
context, android.R.layout.simple_spinner_item, getResources()
.getStringArray(R.array.spnr_language_array));
ArrayAdapter<String> adapterBrowseBy = new ArrayAdapter<String>(
context, android.R.layout.simple_spinner_item, getResources()
.getStringArray(R.array.spnr_browse_array));
spnrLanguage.setAdapter(adapterLanguage);
spnrBrowseBy.setAdapter(adapterBrowseBy);
spnrLanguage.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int pos,
long arg3) {
Toast.makeText(getParent(),
spnrLanguage.getItemAtPosition(pos) + "",
Toast.LENGTH_SHORT).show();
language = spnrLanguage.getItemAtPosition(pos).toString();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
spnrBrowseBy.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int pos,
long arg3) {
Toast.makeText(context,
spnrBrowseBy.getItemAtPosition(pos) + "",
Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
// ////////////////////Search Button Handler/////////////////
btnGo.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (!edTxt_SearchField.getText().toString().equals("")) {
Intent bookSearchResultActivityIntent = new Intent();
bookSearchResultActivityIntent
.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
bookSearchResultActivityIntent.setClass(getParent(),
BookSearchResultActivity.class);
bookSearchResultActivityIntent.putExtra("LANG", language);
bookSearchResultActivityIntent.putExtra("SEARCH_KEYWORDS",
edTxt_SearchField.getText().toString());
MyActivityGroup activityStack = (MyActivityGroup) getParent();
activityStack.push("BooksSearchActivity",
bookSearchResultActivityIntent);
} else {
Toast.makeText(context, "Search Field Empty",
Toast.LENGTH_SHORT).show();
}
}
});
}
private class UIThread extends AsyncTask<String, Integer, String> {
ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
progressDialog = ProgressDialog.show(getParent(),
"Acumlating Books from server...",
"This may Take a few seconds.\nPlease Wait...");
}
@Override
protected String doInBackground(String... params) {
String URL = params[0];
String searchKeywords = params[1];
XMLParser parser = new XMLParser();
String XMLString = parser.getXmlFromUrl(URL, searchKeywords,
searchLang);
// Log.i("XML Response", XMLString);
Document doc = parser.getDomElement(XMLString);
NodeList nl = doc.getElementsByTagName(KEY_ITEM);
// looping through all item nodes <item>
for (int i = 0; i < nl.getLength(); i++) {
Element e = (Element) nl.item(i);
BookTitle.add(parser.getValue(e, KEY_BOOKTITLE));
BookCoverPhotos.add("http://shiaislamicbooks.com/books_Snaps/"
+ parser.getValue(e, KEY_BOOKCODE) + "/1_thumb.jpg");
BookAuther.add(parser.getValue(e, KEY_BOOKAUTHOR));
BookPublishDate.add(parser.getValue(e, KEY_BOOKDATEPUBLISHED));
Log.i("URLs", BookCoverPhotos.toString());
}
for (int i = 0; i < BookAuther.size(); i++) {
try {
bookImageURL = new URL(BookCoverPhotos.get(i));
} catch (MalformedURLException e) {
e.printStackTrace();
Log.i("URL", "ERROR at image position" + i + "");
}
try {
bitMapImage = BitmapFactory.decodeStream(bookImageURL
.openConnection().getInputStream());
bitmapArray.add(bitMapImage);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.i("BITMAP", "ERROR" + i);
}
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.dismiss();
ImageAdapter adapter = new ImageAdapter(getBaseContext(), act);
gridView.setAdapter(adapter);
}
}
public class ImageAdapter extends BaseAdapter {
public ImageAdapter(Context c) {
context = c;
}
// ---returns the number of images---
public int getCount() {
// return imageIDs.length;
return bitmapArray.size();
// return 6;
}
public ImageAdapter(Context ctx, Activity act) {
inflater = (LayoutInflater) act
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
// ---returns the ID of an item---
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
// ---returns an ImageView view---
public View getView(int position, View convertView, ViewGroup parent) {
// ImageView bmImage;
final ViewHolder holder;
View vi = convertView;
if (convertView == null) {
vi = inflater.inflate(R.layout.grid_style, parent, false);
holder = new ViewHolder();
holder.txt_BooksTitle = (TextView) vi
.findViewById(R.id.txt_BookTitle);
holder.img_BookCoverPhoto = (ImageView) vi
.findViewById(R.id.imgBookCover);
vi.setTag(holder);
} else {
holder = (ViewHolder) vi.getTag();
}
holder.txt_BooksTitle.setText(BookTitle.get(position) + "");
holder.img_BookCoverPhoto.setImageBitmap(bitmapArray.get(position));
return vi;
}
}
class ViewHolder {
TextView txt_BooksTitle;
ImageView img_BookCoverPhoto;
}
}
- please have a look on my activity group class and tell what should i do.
thanks in advance