androidtabsactivitygroup

android: How can i set backpress on TabActivity ? where one tab contain only two activity?

Solution 
  •          - this solve ...use this Code..
    1)OffersActivityGroup  add one Activity to add your root activity...

        public class OffersActivityGroup extends ActivityGroup {

            public static OffersActivityGroup group;
            private ArrayList<View> history;

            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                this.history = new ArrayList<View>();
                group = this;

                // Start the root activity withing the group and get its view
                View view = getLocalActivityManager().startActivity(
                        "OffersActivity",
                        new Intent(this, OffersActivity.class)
                                .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
                        .getDecorView();

                // Replace the view of this ActivityGroup
                replaceView(view);

            }

            public void replaceView(View v) {
                // Adds the old one to history
                history.add(v);
                // Changes this Groups View to the new View.
                setContentView(v);
            }

            public void back() {
                if (history.size() > 0) {
                    history.remove(history.size() - 1);
                    setContentView(history.get(history.size() - 1));
                } else {
                    finish();
                }
            }

            @Override
            public void onBackPressed() {
                OffersActivityGroup.group.back();
                return;
            }

        }


    2)OffersActivity

        public class OffersActivity extends Activity implements OnItemClickListener {

        CustomArrayAdapter adapter;
        ListView lvProducts;
        ArrayList<Products> productObj;
        Products product;

        // View rootView;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.product_list);

            init();

            // hideFB();
            // hideTwitter();
            setTitle(getResources().getString(R.string.title_offer));
            // API Call

            if (Global.isNetworkAvailable(OffersActivity.this)) {
                new ProductAsyncTask().execute(Constants.url);
            } else {
                Intent intent = new Intent(OffersActivity.this,
                        OfflineActivity.class);
                startActivity(intent);
            }
        }

        @Override
        protected void onResume() {
            super.onResume();
            if (adapter != null) {
                adapter.notifyDataSetChanged();
            }
        }

        private void init() {
            productObj = new ArrayList<Products>();
            lvProducts = (ListView) findViewById(R.id.lv_products);
            lvProducts.setOnItemClickListener(this);
        }

        @Override
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {

            Intent intent = new Intent(OffersActivity.this,
                    OffersDetailActivity.class);
            intent.putExtra("product", (Products) productObj.get(position));


            View view = OffersActivityGroup.group
                    .getLocalActivityManager()
                    .startActivity("OffersDetailActivity",
                            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
                    .getDecorView();
            OffersActivityGroup.group.replaceView(view);

        }

        public void loadData() {
            adapter = new CustomArrayAdapter(OffersActivity.this,
                    R.layout.product_list_row, productObj);

            lvProducts.setAdapter(adapter);
        }

        // @Override
        // public void onBackPressed() {
        // OffersActivity.group.back();
        // return;
        // }

        public class ProductAsyncTask extends
                AsyncTask<String, String, ArrayList<Products>> {

            String responseString = null;
            ProgressDialog progressDialog;

            public ProductAsyncTask() {
                super();
                progressDialog = new ProgressDialog(getParent());
                progressDialog.setCancelable(false);
            }

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                progressDialog.setMessage("Loading...");
                progressDialog.show();
            }

            @Override
            protected ArrayList<Products> doInBackground(String... params) {

                responseString = readJSONSFeed(params[0]);
                if (responseString != null) {
                    return processUserListJSON(responseString);
                } else {
                    return null;
                }
            }

            @Override
            protected void onPostExecute(ArrayList<Products> result) {
                super.onPostExecute(result);
                if (result.size() == 0 || result == null) {
                }
                progressDialog.dismiss();
                loadData();

            }

            private String readJSONSFeed(String url) {

                StringBuilder stringBuilder = new StringBuilder();

                HttpClient httpClient = new DefaultHttpClient();
                HttpGet httpGet = new HttpGet(url + Constants.REQ_FOR_OFFER);



                try {
                    HttpResponse response = httpClient.execute(httpGet);
                    StatusLine statusLine = response.getStatusLine();

                    int statuscode = statusLine.getStatusCode();

                    if (statuscode == 200) {
                        HttpEntity httpEntity = response.getEntity();
                        InputStream inputStream = httpEntity.getContent();

                        BufferedReader buffer = new BufferedReader(
                                new InputStreamReader(inputStream));

                        String line = null;
                        if ((line = buffer.readLine()) != null) {
                            stringBuilder.append(line);
                        }
                        // buffer.close();
                        inputStream.close();
                    } else {
                    }

                } catch (Exception e) {
                }
                return stringBuilder.toString();
            }

            private synchronized ArrayList<Products> processUserListJSON(
                    String response) {

                try {
                    JSONObject json = new JSONObject(response);
                    JSONArray Records = json
                            .getJSONArray(Constants.JSON_OBJECT_DATA);
                    for (int i = 0; i < Records.length(); i++) {
                        JSONObject Record = Records.getJSONObject(i);

                        String tProductID = Record.getString("product_id");
                        String tTitle = Record.getString("title");
                        String tImage = Record.getString("image");
                        String tDetails = Record.getString("short_description");
                        String tLongDetails = Record.getString("long_description");
                        String tOffer = Record.getString("offer");
                        String tActive = Record.getString("active");
                        String tPromoText = Record.getString("promotion_text");
                        String tProminent = Record.getString("prominent");

                        product = new Products(tProductID, tTitle, tDetails,
                                tLongDetails, tImage, tOffer, tActive, tPromoText,
                                tProminent);

                        if (product == null) {
                        } else {
                            productObj.add(product);
                        }

                    }

                } catch (JSONException ex) {
                    System.out.println(ex);
                    return null;
                }

                return productObj;
            }

        }

    }
2)OfferDetailsActivity

    public class OffersDetailActivity extends Activity implements
        OnClickListener, OnItemSelectedListener {
    Gallery gallery;
    TextView prod_descri, productTitle1, productTitle2;
    ImageAdapter imageAdapter;
    ImageView leftArrow, rightArrow;
    private int selectedImagePosition = 0;
    private List<Drawable> drawables;
    String title, url, title1;
    Bundle b;
    Products product;
    ProductDetails pDetails;
    ArrayList<ProductDetails> productList;
    Button btnFacebook, btnTwitter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.products_details);
        init();
        setTitle(getResources().getString(R.string.title_offer));
        b = getIntent().getExtras();
        product = (Products) b.getSerializable("product");
        if (b != null) {
            if (Global.isNetworkAvailable(OffersDetailActivity.this)) {
                new ProductAsyncTask().execute(Constants.url,
                        product.product_id);
            } else {

                Intent intent = new Intent(OffersDetailActivity.this,
                        OfflineActivity.class);
                startActivity(intent);
            }
        } else {
        }
    }

//  @Override
//  public void onBackPressed() {
//      OffersActivity.group.back();
//      // super.onBackPressed();
//
//  }

    private void init() {
        productList = new ArrayList<ProductDetails>();
        gallery = (Gallery) findViewById(R.id.product_gallery);
        prod_descri = (TextView) findViewById(R.id.product_desc);
        productTitle1 = (TextView) findViewById(R.id.productTitle1);
        productTitle2 = (TextView) findViewById(R.id.productTitle2);

        leftArrow = (ImageView) findViewById(R.id.left_arrow_imageview);
        rightArrow = (ImageView) findViewById(R.id.right_arrow_imageview);

        btnFacebook = (Button) findViewById(R.id.btnFB);
        btnFacebook = (Button) findViewById(R.id.btnTwitter);
        //btnFacebook.setOnClickListener(this);
        // btnTwitter.setOnClickListener(this);

        leftArrow.setOnClickListener(this);
        rightArrow.setOnClickListener(this);
        gallery.setOnItemSelectedListener(this);
    }

    @Override
    public void onClick(View v) {

        switch (v.getId()) {
        case R.id.left_arrow_imageview:

            if (selectedImagePosition > 0) {
                // leftArrow.setVisibility(View.VISIBLE);
                --selectedImagePosition;
            } else if (selectedImagePosition == 0) {
                leftArrow.setVisibility(View.GONE);
                rightArrow.setVisibility(View.VISIBLE);
            }
            gallery.setSelection(selectedImagePosition, true);

            break;
        case R.id.right_arrow_imageview:
            if (selectedImagePosition < drawables.size() - 1) {
                // rightArrow.setVisibility(View.VISIBLE);
                ++selectedImagePosition;
            } else if (selectedImagePosition == drawables.size() - 1) {
                rightArrow.setVisibility(View.GONE);
                leftArrow.setVisibility(View.VISIBLE);
            }

            gallery.setSelection(selectedImagePosition, true);

            break;



        default:
            break;
        }

    }

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position,
            long id) {

        selectedImagePosition = position;

        productTitle1.setText(product.title);
        productTitle2.setText(productList.get(position).title);
        prod_descri.setText(productList.get(position).description);

        if (selectedImagePosition > 0
                && selectedImagePosition < drawables.size() - 1) {
            leftArrow.setVisibility(View.VISIBLE);
            rightArrow.setVisibility(View.VISIBLE);
        } else if (selectedImagePosition == 0) {
            leftArrow.setVisibility(View.GONE);
        } else if (selectedImagePosition == drawables.size() - 1) {
            rightArrow.setVisibility(View.GONE);
        }
        // setSelectedImage(selectedImagePosition);
    }

    @Override
    public void onNothingSelected(AdapterView<?> arg0) {
    }

    // AsyncTask

    public class ProductAsyncTask extends
            AsyncTask<String, String, ArrayList<ProductDetails>> {

        private Context getDialogContext() {
            Context context;
            if (getParent() != null)
                context = getParent();
            else
                context = OffersDetailActivity.this;
            return context;
        }

        String responseString = null;
        ProgressDialog progressDialog;

        public ProductAsyncTask() {
            super();
            // progressDialog = new ProgressDialog(ProductDetailsActivity.this);
            progressDialog = new ProgressDialog(getDialogContext());
            progressDialog.setCancelable(false);
        }

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            progressDialog.setMessage("Loading...");
            progressDialog.show();
        }

        @Override
        protected ArrayList<ProductDetails> doInBackground(String... params) {

            responseString = readJSONSFeed(params[0], params[1]);

            if (responseString != null) {
                return processProductDetailsJSON(responseString);
            } else {
                return null;
            }
        }

        @Override
        protected void onPostExecute(ArrayList<ProductDetails> result) {
            super.onPostExecute(result);
            if (result.size() == 0 || result == null) {
            }
            progressDialog.dismiss();

            drawables = createDrawables(result);
            imageAdapter = new ImageAdapter(OffersDetailActivity.this,
                    drawables);
            if (drawables.size() > 0) {

                gallery.setSelection(selectedImagePosition, true);
            }

            if (drawables.size() == 1) {
                leftArrow.setVisibility(View.GONE);
                rightArrow.setVisibility(View.GONE);
            }

            gallery.setAdapter(imageAdapter);

        }

        private List<Drawable> createDrawables(ArrayList<ProductDetails> result) {

            List<Drawable> drawablesUrl = new ArrayList<Drawable>();
            try {
                for (ProductDetails objProDetails : result) {
                    drawablesUrl.add(Global
                            .getBitmapFromURL(objProDetails.image_path));
                    // drawablesUrl.add(loadImageFromURL(objProDetails.image_path));
                }
                return drawablesUrl;

            } catch (Exception e) {
                return null;
            }

        }

        @SuppressWarnings("unused")
        private Drawable loadImageFromURL(String image_path) {
            try {
                InputStream is = (InputStream) new URL(url).getContent();
                Drawable d = Drawable.createFromStream(is, "src name");
                return d;
            } catch (Exception e) {
                return null;
            }
        }

        private String readJSONSFeed(String url, String productID) {

            StringBuilder stringBuilder = new StringBuilder();

            HttpClient httpClient = new DefaultHttpClient();
            HttpGet httpGet = new HttpGet(url + Constants.REQ_FOR_PRODUCT_IMAGE
                    + productID + Constants.REQ_FOR_OFFER);



            try {
                HttpResponse response = httpClient.execute(httpGet);
                StatusLine statusLine = response.getStatusLine();

                int statuscode = statusLine.getStatusCode();

                if (statuscode == 200) {

                    HttpEntity httpEntity = response.getEntity();
                    InputStream inputStream = httpEntity.getContent();

                    BufferedReader buffer = new BufferedReader(
                            new InputStreamReader(inputStream));

                    String line = null;
                    if ((line = buffer.readLine()) != null) {
                        stringBuilder.append(line);
                    }
                    // buffer.close();
                    inputStream.close();
                } else {
                }

            } catch (Exception e) {
            }
            return stringBuilder.toString();
        }

        private synchronized ArrayList<ProductDetails> processProductDetailsJSON(
                String response) {

            try {
                JSONObject json = new JSONObject(response);
                JSONArray Records = json
                        .getJSONArray(Constants.JSON_OBJECT_DATA);
                for (int i = 0; i < Records.length(); i++) {
                    JSONObject Record = Records.getJSONObject(i);

                    String tTitle = Record.getString("title");
                    String tImagePath = Record.getString("image_path");
                    String tDescription = Record.getString("description");

                    pDetails = new ProductDetails(tDescription, tTitle,
                            tImagePath);

                    if (pDetails == null) {
                    } else {
                        productList.add(pDetails);
                    }
                }

            } catch (JSONException ex) {
                System.out.println(ex);
                return null;
            }

            return productList;
        }

    }

}