Hi every one,
im developing one program for android gridview and displaying
images from getting images in sdcard and displayed. when i click one
image need to add one images in that gridview child. its working
fine.. bit my problem is when im scrolling down the un selected images
was highlighted. here im post my code..
package com.SdcardIma;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
/**
* Loads images from SD card.
*
* @author Mihai Fonoage
*
*/
public class SdcardIma extends Activity implements
OnItemClickListener {
/**
* Grid view holding the images.
*/
private List<String> pathlist=new ArrayList<String>();
private List<Object> viewList=new ArrayList<Object>();
private List<Integer> checkList=new ArrayList<Integer>();
private int count =0;
private GridView sdcardImages;
// private boolean isVisble = false;
/**
* Image adapter for the grid view.
*/
private ImageAdapter imageAdapter;
/**
* Display used for getting the width of the screen.
*/
private Display display;
/**
* Creates the content view, sets up the grid, the adapter, and
the click listener.
*
* @see android.app.Activity#onCreate(android.os.Bundle)
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Request progress bar
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.main);
display = ((WindowManager)
getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
setupViews();
setProgressBarIndeterminateVisibility(true);
loadImages();
}
/**
* Free up bitmap related resources.
*/
protected void onDestroy() {
super.onDestroy();
final GridView grid = sdcardImages;
final int count = grid.getChildCount();
ImageView v = null;
for (int i = 0; i < count; i++) {
v = (ImageView) grid.getChildAt(i);
((BitmapDrawable) v.getDrawable()).setCallback(null);
}
}
/**
* Setup the grid view.
*/
private void setupViews() {
sdcardImages = (GridView) findViewById(R.id.sdcard);
sdcardImages.setNumColumns(display.getWidth()/95);
sdcardImages.setClipToPadding(false);
sdcardImages.setOnItemClickListener(SdcardIma.this);
imageAdapter = new ImageAdapter(getApplicationContext());
sdcardImages.setAdapter(imageAdapter);
}
/**
* Load images.
*/
private void loadImages() {
final Object data = getLastNonConfigurationInstance();
if (data == null) {
new LoadImagesFromSDCard().execute();
} else {
final LoadedImage[] photos = (LoadedImage[]) data;
if (photos.length == 0) {
new LoadImagesFromSDCard().execute();
}
for (LoadedImage photo : photos) {
addImage(photo);
}
}
}
/**
* Add image(s) to the grid view adapter.
*
* @param value Array of LoadedImages references
*/
private void addImage(LoadedImage... value) {
for (LoadedImage image : value) {
imageAdapter.addPhoto(image);
imageAdapter.notifyDataSetChanged();
}
}
/**
* Save bitmap images into a list and return that list.
*
* @see android.app.Activity#onRetainNonConfigurationInstance()
*/
@Override
public Object onRetainNonConfigurationInstance() {
final GridView grid = sdcardImages;
final int count = grid.getChildCount();
final LoadedImage[] list = new LoadedImage[count];
for (int i = 0; i < count; i++) {
final ImageView v = (ImageView) grid.getChildAt(i);
list[i] = new LoadedImage(((BitmapDrawable)
v.getDrawable()).getBitmap());
}
return list;
}
/**
* Async task for loading the images from the SD card.
*
* @author Mihai Fonoage
*
*/
class LoadImagesFromSDCard extends AsyncTask<Object, LoadedImage,
Object> {
/**
* Load images from SD Card in the background, and display
each image on the screen.
*
* @see android.os.AsyncTask#doInBackground(Params[])
*/
@Override
protected Object doInBackground(Object... params) {
//setProgressBarIndeterminateVisibility(true);
Bitmap bitmap = null;
Bitmap newBitmap = null;
String[] projection =
{android.provider.MediaStore.Images.Media._ID};
System.out.println("the value of
projection=>"+projection);
// Create the cursor pointing to the SDCard
Cursor cursor =
managedQuery( android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection, // Which columns to return
null, // Return all rows
null,
android.provider.MediaStore.Images.Thumbnails._ID);
String[] projection1 =
{android.provider.MediaStore.Images.Media.DATA};
cursor =
managedQuery( android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection1, // Which columns to return
null, // Return all rows
null,
null);
int columnIndex =
cursor.getColumnIndexOrThrow(android.provider.MediaStore.Images.Media.DATA);
int size = cursor.getCount();
// If size is 0, there are no images on the SD Card.
if (size == 0) {
//No Images available, post some message to the user
}
cursor.moveToFirst();
while (cursor.isAfterLast() == false) {
//view.append("n" + mCursor.getString(1));
String imagePath = cursor.getString(columnIndex);
System.out.println("gridview image path
values===="+imagePath);
bitmap = BitmapFactory.decodeFile(imagePath);
if (bitmap != null) {
newBitmap = Bitmap.createScaledBitmap(bitmap,
70, 70, true);
bitmap.recycle();
if (newBitmap != null) {
publishProgress(new LoadedImage(newBitmap));
}
}
cursor.moveToNext();
}
cursor.close();
return null;
}
/**
* Add a new LoadedImage in the images grid.
*
* @param value The image.
*/
@Override
public void onProgressUpdate(LoadedImage... value) {
addImage(value);
}
/**
* Set the visibility of the progress bar to false.
*
* @see android.os.AsyncTask#onPostExecute(java.lang.Object)
*/
@Override
protected void onPostExecute(Object result) {
setProgressBarIndeterminateVisibility(false);
}
}
/**
* Adapter for our image files.
*
* @author Mihai Fonoage
*
*/
class ImageAdapter extends BaseAdapter {
private Context mContext;
private LayoutInflater inflater=null;
private ArrayList<LoadedImage> photos = new
ArrayList<LoadedImage>();
public ImageAdapter(Context context) {
mContext = context;
inflater =
(LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void addPhoto(LoadedImage photo) {
photos.add(photo);
}
public int getCount() {
return photos.size();
}
public Object getItem(int position) {
return photos.get(position);
}
public long getItemId(int position) {
return position;
}
public class ViewHolder{
public ImageView back_Frame_Off;
public ImageView back_Frame_On;
public ImageView pictureImage;
public RelativeLayout rel;
public boolean isVisble = false;
}
public View getView(int position, View convertView, ViewGroup
parent) {
View view = convertView;
ViewHolder viewHolder;
if(convertView==null){
view = inflater.inflate(R.layout.view, null);
viewHolder=new ViewHolder();
viewHolder.rel=(RelativeLayout)view.findViewById(R.id.frameLayout1);
viewHolder.rel.setLayoutParams(new
GridView.LayoutParams(63, 63));
viewHolder.back_Frame_On=(ImageView)view.findViewById(R.id.imageView2);
viewHolder.back_Frame_On.setMaxHeight(55);
viewHolder.back_Frame_On.setMaxWidth(55);
viewHolder.back_Frame_On.setPadding(8, 8, 0, 0);
viewHolder.pictureImage=(ImageView)view.findViewById(R.id.imageView3);
viewHolder.pictureImage.setMaxHeight(53);
viewHolder.pictureImage.setMaxWidth(53);
viewHolder.pictureImage.setPadding(10, 10, 0, 0);
view.setTag(viewHolder);
/*view.setId(count);
count++;*/
}
else
viewHolder=(ViewHolder)view.getTag();
viewHolder.back_Frame_Off=(ImageView)view.findViewById(R.id.imageView1);
viewHolder.back_Frame_Off.setMaxHeight(63);
viewHolder.back_Frame_Off.setMaxWidth(63);
viewHolder.back_Frame_Off.setImageResource(R.drawable.photoview_frame_on);
viewHolder.back_Frame_On.setImageResource(R.drawable.photoview_frame_off);
viewHolder.pictureImage.setScaleType(ImageView.ScaleType.FIT_CENTER);
viewHolder.pictureImage.setPadding(8, 8, 8, 8);
viewHolder.pictureImage.setImageBitmap(photos.get(position).getBitmap());
return view;
}
}
/**
* A LoadedImage contains the Bitmap loaded for the image.
*/
private static class LoadedImage {
Bitmap mBitmap;
LoadedImage(Bitmap bitmap) {
mBitmap = bitmap;
}
public Bitmap getBitmap() {
return mBitmap;
}
}
/**
* When an image is clicked, load that image as a puzzle.
*/
public void onItemClick(AdapterView<?> parent, View v, int
position, long id) {
int columnIndex = 0;
String[] projection =
{android.provider.MediaStore.Images.Media.DATA};
Cursor cursor =
managedQuery( android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection, // Which columns to return
null, // Return all rows
null,
null);
columnIndex =
cursor.getColumnIndexOrThrow(android.provider.MediaStore.Images.Media.DATA);
cursor.moveToPosition(position);
System.out.println("gridview selectedd postion
valie===="+viewList.size());
// Get image filename
String imagePath = cursor.getString(columnIndex);
System.out.println("gridview seleccted path
valie===="+imagePath);
Toast.makeText(SdcardIma.this, "Please select
photos"+position, Toast.LENGTH_SHORT).show();
View frame= sdcardImages.getChildAt(position);
if(((ViewGroup) frame).getChildCount() != 3 )
{
ImageView backImageFrame1 =(ImageView)((ViewGroup)
frame).getChildAt(0);
backImageFrame1.setVisibility(View.GONE);
for(int i=0;i<((ViewGroup) frame).getChildCount();i++)
{
View vTemp = ((ViewGroup) frame).getChildAt(i);
if(vTemp instanceof TickImage)
{
((ViewGroup) frame).removeViewAt(i);
}
}
for(int i=0;i<pathlist.size();i++)
{
String val=pathlist.get(i);
if( val.equals(imagePath))
{
pathlist.remove(imagePath);
}
}
}
else
{
TickImage tickImage=new
TickImage(SdcardIma.this);
//tickImage.tagValue=position;
ImageView backImageFrame1 =(ImageView)((ViewGroup)
frame).getChildAt(0);
backImageFrame1.setVisibility(View.VISIBLE);
((ViewGroup) frame).addView(tickImage, 25, 25);
pathlist.add(imagePath);
}
}
}
here im using one class for adding tick image in that child. so anyone
know how to solve this problem pls help me
as soon as possible....
really im new one for android.. pls help me soon...
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