Activity:
public class Gallery extends ActionBarActivity {
public GridView imagegrid;
private ArrayList<String> imageUrls;
private ImagesAdapter imageAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gallery);
init();
}
private void init() {
final String[] columns= {MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID};
final String orderBy= MediaStore.Images.Media.DATE_TAKEN;
Cursor imageCursor= this.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null, null, orderBy +" DESC");
this.imageUrls=new ArrayList<String>();
for(int i=0; i< imageCursor.getCount();i++){
imageCursor.moveToPosition(i);
int dataColumnIndex =imageCursor.getColumnIndex(MediaStore.Images.Media.DATA);
imageUrls.add(imageCursor.getString(dataColumnIndex));
}
imagegrid = (GridView) findViewById(R.id.GalleryViewLayout);
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int width=metrics.widthPixels;
int height=metrics.heightPixels;
float scalefactor = getResources().getDisplayMetrics().density * 100;
int number=width;
int col = (int) ((float) number / (float) scalefactor);
imagegrid.setNumColumns(col);
imageAdapter=new ImagesAdapter(this,imageUrls,width,height);
imagegrid.setAdapter(imageAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.gallery, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
return super.onOptionsItemSelected(item);
}
}
Xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.sachinsandbhor.gallerydemo.Gallery"
tools:ignore="MergeRootFrame" >
<GridView
android:id="@+id/GalleryViewLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:numColumns="3" >
</GridView>
</RelativeLayout>
Adapter:
public class ImagesAdapter extends BaseAdapter{
ArrayList<String> mList;
LayoutInflater mInflater;
Context mContext;
int width,height;
public ImagesAdapter(Context context, ArrayList<String> imageList, int Screenwidth, int Screenheight) {
mContext = context;
mInflater = LayoutInflater.from(mContext);
mList = new ArrayList<String>();
this.mList = imageList;
this.width=Screenwidth;
this.height=Screenheight;
}
public void initialize() {
mList.clear();
final String[] columns= {MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID};
final String orderBy= MediaStore.Images.Media.DATE_TAKEN;
Cursor imageCursor= mContext.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null, null, orderBy +" DESC");
this.mList=new ArrayList<String>();
for(int i=0; i< imageCursor.getCount();i++){
imageCursor.moveToPosition(i);
int dataColumnIndex =imageCursor.getColumnIndex(MediaStore.Images.Media.DATA);
mList.add(imageCursor.getString(dataColumnIndex));
System.out.println("=====> Array path => "+mList.get(i));
}
imageCursor.close();
}
@Override
public int getCount() {
return mList.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
if(convertView == null) {
convertView = mInflater.inflate(R.layout.galleryitem, null);
}
CheckBox mCheckBox = (CheckBox) convertView.findViewById(R.id.itemCheckBox);
ImageView imageView = (ImageView) convertView.findViewById(R.id.thumbImage);
float scalefactor = mContext.getResources().getDisplayMetrics().density * 100;
int number=width;
int columnsSize = (int) ((float) number / (float) scalefactor);
int newWidth=width/columnsSize;
int newHeight=height/4;
Picasso.with(mContext).load("file://"+mList.get(position)).resize(newWidth,newHeight).centerCrop()
.placeholder(R.drawable.ic_launcher)
.into(imageView);
mCheckBox.setTag(position);
mCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
Toast.makeText(mContext, "You selected :"+"file://"+mList.get(position), Toast.LENGTH_LONG).show();
}
});
return convertView;
}
}
Custom view for adapter:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/FrameLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="@+id/thumbImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:scaleType="fitXY" />
<CheckBox
android:id="@+id/itemCheckBox"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom|right"
android:button="@drawable/checkboxstyle" />
</FrameLayout>
add below two lines in AndroidManifest.xml
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Checkbox style :
<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:drawable="@drawable/overlay" />
</selector>
put image you want to place as checkbox style in android:drawable
Screenshot:
Here is the sample Code
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