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Gridview - Click image to view image in Viewpager

This is a gridview that get image from json. and it works fine. I want to click image in this gridview to show full image and can slide it. I find the solution of this problem is used Viewpager.

how can I click image in gridview to show image and can slid?

you can read this code more easier. http://pastebin.com/Q8Ljt9yL

enter image description here

public class MainActivity extends Activity {

public static final int DIALOG_DOWNLOAD_JSON_PROGRESS = 0;
private ProgressDialog mProgressDialog;
ArrayList<HashMap<String, Object>> MyArrList;

@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Permission StrictMode
    if (android.os.Build.VERSION.SDK_INT > 9) {
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
    }
    // Download JSON File
    new DownloadJSONFileAsync().execute();
} 

@Override
protected Dialog onCreateDialog(int id) {
    switch (id) {
    case DIALOG_DOWNLOAD_JSON_PROGRESS:
        mProgressDialog = new ProgressDialog(this);
        mProgressDialog.setMessage("Downloading.....");
        mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        mProgressDialog.setCancelable(true);
        mProgressDialog.show();
        return mProgressDialog;
    default:
        return null;
    }
}

public void ShowAllContent() {
    final GridView gridView1 = (GridView) findViewById(R.id.gridView1);
    gridView1.setAdapter(new ImageAdapter(MainActivity.this, MyArrList));
    gridView1.setOnItemClickListener(new OnItemClickListener() {

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

            Toast.makeText(getApplicationContext(), "this is", Toast.LENGTH_SHORT).show();
        }
    });
}

public class ImageAdapter extends BaseAdapter {
    private Context context;
    private ArrayList<HashMap<String, Object>> MyArr = new ArrayList<HashMap<String, Object>>();

    public ImageAdapter(Context c, ArrayList<HashMap<String, Object>> myArrList) {
        context = c;
        MyArr = myArrList;
    }

    public int getCount() {
        return MyArr.size();
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;
        View myView = convertView;
        viewHolder = new ViewHolder();
        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            myView = inflater.inflate(R.layout.activity_column, null);

            viewHolder.imageView = (ImageView) myView.findViewById(R.id.ColImgPath);
            viewHolder.imageView.getLayoutParams().height = 120;
            viewHolder.imageView.getLayoutParams().width = 120;
            viewHolder.imageView.setPadding(5, 5, 5, 5);
            viewHolder.imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            try {
                viewHolder.imageView.setImageBitmap((Bitmap) MyArr.get(position).get("ImageThumBitmap"));
            } catch (Exception e) {
                viewHolder.imageView.setImageResource(android.R.drawable.ic_menu_report_image);
            }
        }
        return myView;
    }
}

private static class ViewHolder {
    public ImageView imageView;
}

// Download JSON in Background
public class DownloadJSONFileAsync extends AsyncTask<String, Void, Void> {

    protected void onPreExecute() {
        super.onPreExecute();
        showDialog(DIALOG_DOWNLOAD_JSON_PROGRESS);
    }

    @Override
    protected Void doInBackground(String... params) {

        String url = "http://192.168.10.101/adchara1/";
        JSONArray data;
        try {
            data = new JSONArray(getJSONUrl(url));
            MyArrList = new ArrayList<HashMap<String, Object>>();
            HashMap<String, Object> map;

            for (int i = 0; i < data.length(); i++) {
                JSONObject c = data.getJSONObject(i);
                map = new HashMap<String, Object>();

                map.put("photo", (String) c.getString("photo"));
                map.put("ImageThumBitmap",(Bitmap) loadBitmap(c.getString("photo")));

                // Full (for View Popup)
                map.put("frame", (String) c.getString("frame"));

                MyArrList.add(map);
            }

        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

    protected void onPostExecute(Void unused) {
        ShowAllContent(); // When Finish Show Content
        dismissDialog(DIALOG_DOWNLOAD_JSON_PROGRESS);
        removeDialog(DIALOG_DOWNLOAD_JSON_PROGRESS);
    }
}

/*** Get JSON Code from URL ***/
public String getJSONUrl(String url) {
    StringBuilder str = new StringBuilder();
    HttpClient client = new DefaultHttpClient();
    HttpGet httpGet = new HttpGet(url);
    try {
        HttpResponse response = client.execute(httpGet);
        StatusLine statusLine = response.getStatusLine();
        int statusCode = statusLine.getStatusCode();
        if (statusCode == 200) { // Download OK
            HttpEntity entity = response.getEntity();
            InputStream content = entity.getContent();
            BufferedReader reader = new BufferedReader(new InputStreamReader(content));
            String line;
            while ((line = reader.readLine()) != null) {
                str.append(line);
            }
        } else {
            Log.e("Log", "Failed to download file..");
        }
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return str.toString();
}

/***** Get Image Resource from URL (Start) *****/
private static final String TAG = "Image";
private static final int IO_BUFFER_SIZE = 4 * 1024;

public static Bitmap loadBitmap(String url) {
    Bitmap bitmap = null;
    InputStream in = null;
    BufferedOutputStream out = null;

    try {
        in = new BufferedInputStream(new URL(url).openStream(),IO_BUFFER_SIZE);

        final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
        out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
        copy(in, out);
        out.flush();

        final byte[] data = dataStream.toByteArray();
        BitmapFactory.Options options = new BitmapFactory.Options();
        // options.inSampleSize = 1;

        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
    } catch (IOException e) {
        Log.e(TAG, "Could not load Bitmap from: " + url);
    } finally {
        closeStream(in);
        closeStream(out);
    }
    return bitmap;
}

private static void closeStream(Closeable stream) {
    if (stream != null) {
        try {
            stream.close();
        } catch (IOException e) {
            android.util.Log.e(TAG, "Could not close stream", e);
        }
    }
}

private static void copy(InputStream in, OutputStream out)
        throws IOException {
    byte[] b = new byte[IO_BUFFER_SIZE];
    int read;
    while ((read = in.read(b)) != -1) {
        out.write(b, 0, read);
    }
}
}
like image 228
kongkea Avatar asked Nov 22 '12 10:11

kongkea


3 Answers

its same as you need. just click event of grid view and get image in next screen using view pager.

Click event of grid view images:

GridView gridView = (GridView) findViewById(R.id.gridview);
        gridView.setAdapter(new ImageAdapter());
        gridView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) 
         {
          HashMap<String, Object> selected = (HashMap<String, Object>)  

          gridView.getItemAtPosition(position);

            }
        });
like image 107
Chintan Khetiya Avatar answered Oct 18 '22 02:10

Chintan Khetiya


First of all you have to implement ImageAdapter class' method getItem(int position) to return the item at "position" in MyArr. Next, in click listener, you can do something like

HashMap<String, Object> selected = (HashMap<String, Object>) gridView.getItemAtPosition(position);

With selected you have your bitmap.

like image 32
tontonGG Avatar answered Oct 18 '22 01:10

tontonGG


See this class you can find

GridView gridView = (GridView) findViewById(R.id.gridview);
        gridView.setAdapter(new ImageAdapter());
        gridView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                startImageGalleryActivity(position);
            }
        });

Here you will get same output what you wants.

You can also download complete source code here

like image 36
MAC Avatar answered Oct 18 '22 02:10

MAC