Hi I have images in grid view. when i click my grid view images, it's display in full screen. if i want view another image go back in grid view then select another image view in full screen. i feel it's hard one.. so i am trying to view images full screen view using to swipe....no idea how to create this method please guide me and give some nice codes also...
This is my working app screen shot:
source code: 1. ImageViewExample.java
public class ImageViewExample extends Activity {
/** Called when the activity is first created. */
private Cursor imagecursor, actualimagecursor;
private int image_column_index, actual_image_column_index;
GridView imagegrid;
private int count;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
init_phone_image_grid();
}
private void init_phone_image_grid() {
String[] img = { MediaStore.Images.Thumbnails._ID };
imagecursor = managedQuery(
MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, img, null,
null, MediaStore.Images.Thumbnails.IMAGE_ID + "");
image_column_index = imagecursor
.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
count = imagecursor.getCount();
imagegrid = (GridView) findViewById(R.id.PhoneImageGrid);
imagegrid.setAdapter(new ImageAdapter(getApplicationContext()));
imagegrid.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v,int position, long id) {
System.gc();
String[] proj = { MediaStore.Images.Media.DATA };
actualimagecursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, proj,
null, null, null);
actual_image_column_index = actualimagecursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
actualimagecursor.moveToPosition(position);
String i = actualimagecursor.getString(actual_image_column_index);
System.gc();
Intent intent = new Intent(getApplicationContext(), ViewImage.class);
intent.putExtra("filename", i);
startActivity(intent);
}
});
}
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return count;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position,View convertView,ViewGroup parent) {
System.gc();
ImageView i = new ImageView(mContext.getApplicationContext());
if (convertView == null) {
imagecursor.moveToPosition(position);
int id = imagecursor.getInt(image_column_index);
i.setImageURI(Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, ""+ id));
i.setScaleType(ImageView.ScaleType.CENTER_CROP);
i.setLayoutParams(new GridView.LayoutParams(92, 92));
}
else {
i = (ImageView) convertView;
}
return i;
}
}
}
ViewImage.java
public class ViewImage extends Activity {
private String filename;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
System.gc();
Intent i = getIntent();
Bundle extras = i.getExtras();
BitmapFactory.Options bfo = new BitmapFactory.Options();
bfo.inSampleSize = 2;
filename = extras.getString("filename");
ImageView iv = new ImageView(getApplicationContext());
Bitmap bm = BitmapFactory.decodeFile(filename, bfo);
iv.setImageBitmap(bm);
setContentView(iv);
}
}
After getting id of selected image, implement this..
// this Class For Grid view images
package com.thumbnailview;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;
public class Activity_ThumbView extends Activity
{
GridView gridview;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View v, int position, long id)
{
Toast.makeText(Activity_ThumbView.this, "" + position, 2).show();
id=parent.getPositionForView(v);
Intent i=new Intent(Activity_ThumbView.this,Activity_ImageView.class);
i.putExtra("position", position);
startActivity(i);
finish();
}
});
}
public class ImageAdapter extends BaseAdapter
{
Context context;
public ImageAdapter(Context c )
{
context = c ;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return mThumbIds[position];
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null)
{
imageView = new ImageView(context);
imageView.setLayoutParams(new GridView.LayoutParams(75, 75));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
}
else
{
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
}
public static Integer[] mThumbIds = {
R.drawable.a,R.drawable.icon,
R.drawable.b, R.drawable.s,
R.drawable.c, R.drawable.r,
R.drawable.d, R.drawable.q,
R.drawable.e, R.drawable.p,
R.drawable.f, R.drawable.o,
R.drawable.g, R.drawable.n,
R.drawable.h, R.drawable.m,
R.drawable.i, R.drawable.l,
R.drawable.j, R.drawable.k,
R.drawable.t,R.drawable.y,
R.drawable.u,R.drawable.x,
R.drawable.v,R.drawable.s,
R.drawable.cd,R.drawable.z,
R.drawable.bc,R.drawable.ab
};
}
// This Flip image Class
package com.thumbnailview;
import java.io.IOException;
import android.app.Activity;
import android.app.WallpaperManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ViewFlipper;
public class Activity_ImageView extends Activity
{
ImageView thumb_imgview;
ViewFlipper viewFlipper;
Button b_wall;
Button b_home;
// Animation a,b;
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
private GestureDetector gestureDetector;
View.OnTouchListener gestureListener;
int j;
WallpaperManager myWall;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.image);
j=getIntent().getExtras().getInt("position");
myWall = WallpaperManager.getInstance(getApplicationContext());
b_wall=(Button) findViewById(R.id.button3);
b_home=(Button) findViewById(R.id.button1);
thumb_imgview=(ImageView) findViewById(R.id.thumb_txt_image);
thumb_imgview.setImageResource(Activity_ThumbView.mThumbIds[j]);
gestureDetector = new GestureDetector(new MyGestureDetector());
b_wall.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
myWall.setResource(Activity_ThumbView.mThumbIds[j]);
} catch (IOException e) {
e.printStackTrace();
}
}
});
b_home.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i=new Intent(Activity_ImageView.this,Activity_ThumbView.class);
startActivity(i);
finish();
}
});
}
public class MyGestureDetector extends SimpleOnGestureListener implements OnGestureListener
{
public boolean onFling(MotionEvent m1, MotionEvent m2, float velocityX, float velocityY)
{
try
{
if (Math.abs(m1.getY() - m2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
if(m1.getX() - m2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY)
{
if(Activity_ThumbView.mThumbIds.length>j)
{
j++;
thumb_imgview.setImageResource(Activity_ThumbView.mThumbIds[j]);
}
}
else if (m2.getX() - m1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY)
{
if(j>0)
{
j--;
thumb_imgview.setImageResource(Activity_ThumbView.mThumbIds[j]);
}
}
}
catch (Exception e)
{
}
return false;
}
}
public boolean onTouchEvent(MotionEvent event)
{
if (gestureDetector.onTouchEvent(event))
return true;
else
return false;
}
}
Implement OnGestureListener in ViewImage activity and capture swipe from user.
For displaying previous or next image, use cursor.
Store all image filenames in array when you are populating into Gridview and then pass that array to another view from that array you can get all images instead of go back to gridview for selecting images..
The easiest way to do this is indeed like RajaReddy P said: create an array with the filenames/urls pass it to the ViewImage activity...
For the ViewImage activity I really would use the ViewPager! Really easy to implement and the swiping is handled for you!
More about viewpager:
http://android-developers.blogspot.com/2011/08/horizontal-view-swiping-with-viewpager.html
Related
I have been writing a gallery app for Android as I am just beginning with it. I have managed to get it working previously with photos in the drawable folder but now I have implemented getting the images from the storage, I can't seem to figure out how to get the ID to pass to the ShowPic Method.
Here is the code I have for my Main Activity:
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
public class MainActivity extends AppCompatActivity
{
private static final int MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE = 1;
private Cursor cursor;
private int columnIndex;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)
{
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);
}
String[] projection = {MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID};
cursor = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, null, null, MediaStore.Images.Thumbnails._ID + "");
columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);
GridView imgGridView = findViewById(R.id.imgGridView);
PicAdapter picAdapter = new PicAdapter(MainActivity.this, cursor, columnIndex);
imgGridView.setAdapter(picAdapter);
imgGridView.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
}
});
}
public void ShowPic(final int imgID)
{
Intent intent = new Intent(MainActivity.this, OpenPicFull.class);
intent.putExtra("picId", imgID);
startActivity(intent);
}
}
Here is my Adapter:
public class PicAdapter extends BaseAdapter
{
Context mCont;
Cursor mCur;
ImageView mImageView;
int mColumnIndex;
public PicAdapter(Context cont, Cursor cur, int index)
{
mCont = cont;
mCur = cur;
mColumnIndex = index;
}
#Override
public int getCount()
{
return mCur.getCount();
}
#Override
public Object getItem(int position)
{
return position;
}
#Override
public long getItemId(int position)
{
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent)
{
mImageView = new ImageView(mCont);
mCur.moveToPosition(position);
int imageID = mCur.getInt(mColumnIndex);
mImageView.setImageURI(Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "" + imageID));
mImageView.setLayoutParams(new GridView.LayoutParams(330, 330));
mImageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
mImageView.setPadding(4, 4, 4, 4);
return mImageView;
}
}
Here is my OpenFullPic class:
public class OpenPicFull extends AppCompatActivity
{
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_open_pic_full);
ImageView fullImgView = findViewById(R.id.pic_full);
int picID = getIntent().getExtras().getInt("picId");
fullImgView.setImageResource(picID);
}
}
Any help would be greatly appreciated
Thanks
So do the same thing as you did in adapter:
imgGridView.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
cursor.moveToPosition(position);
ShowPic(cursor.getInt(columnIndex));
}
});
}
And change your Openfullpic with this:
fullImgView.setImageURI(Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "" + picID));
Also a suggestion try to optimize your image because your code will show memory error if there are lots of image
I am writing an app that displays a grid of images stored on a local database using GridView. I implemented the deleteSelectedImage method triggered by a button which deletes a given image of the grid in the database. The deletion works, but I cannot get my GridView to refresh by itself... If I close the activity and then open it again, the changes are visible.
Here's my code :
The activity :
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.TextView;
public class GalleryShowActivity extends AppCompatActivity {
private final String DEBUG_TAG = "GalleryShowActivity";
private DatabaseHandler db;
private Cursor c;
private ImageAdapter mBaseAdapter;
private TextView selectedImageText;
private GridView mGridView;
// currently selected position in the grid
private int mSelectedPos;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gallery_show);
db = new DatabaseHandler(this);
c = db.getCursorOnAllImages(this);
mBaseAdapter = new ImageAdapter(this, c, db);
mSelectedPos = -1;
selectedImageText = (TextView) findViewById(R.id.selectedImageText);
selectedImageText.setText("Selected image : NONE");
mGridView = (GridView) findViewById(R.id.gridview);
mGridView.setAdapter(mBaseAdapter);
mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Log.d(DEBUG_TAG, "IMAGE CLICKED");
// click selects an image (can be changed later)
mSelectedPos = position;
selectedImageText.setText("Selected image : " + (position + 1));
}
});
}
public void deleteSelectedImage(View view) {
boolean exists = c.moveToPosition(mSelectedPos);
if (exists) {
boolean success = db.deletePointedPicture(c, this);
if (success) {
Log.d(DEBUG_TAG, "DELETE SUCCESS");
mBaseAdapter.notifyDataSetChanged();
// display a success message...
}
} else {
// display an error...
}
}
}
And here is the code for the ImageAdapter class :
package ch.epfl.sweng.project;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
class ImageAdapter extends BaseAdapter {
private Context mContext;
private Cursor mCursor;
private DatabaseHandler mHandler;
ImageAdapter(Context context, Cursor cursor, DatabaseHandler handler) {
mContext = context;
mCursor = cursor;
mHandler = handler;
}
#Override
public int getCount() {
return mCursor.getCount();
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
int rowHeight = 200;
int rowWidth = 300;
ImageView imageView;
if (convertView == null) {
// if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(rowWidth, rowHeight));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
Bitmap bm = mHandler.getImageByIndex(mCursor, position);
imageView.setImageBitmap(bm);
imageView.setVisibility(View.VISIBLE);
return imageView;
}
}
I also tried this :
mBaseAdapter = new ImageAdapter(this, c, db);
mGridView.setAdapter(mBaseAdapter);
Instead of :
mBaseAdapter.notifyDataSetChanged();
But it did not work.
You are implementing it wrong. Even after deletion data in cursor will be same. Data in cursor is only updated when onCreate() is again called. Either update the cursor on deleteSelectedImage method after deleting the data and then call notifyDataSetChanged or try to pass list instead of cursor in constructor and while deleting, delete data from list as well as database and then call notifyDataSetChanged.
I have developed a Contacts application. It does everything that a normal contacts application should does. There is always a chance of improvement. I had noticed in Android Emulator that loading for contact images starts when user has settled, he has scrolled the contact list to the area where there are chances are good that he would get contact he is searching for. So, I tried to implement the same thing on my app copy. I have implemented it. Its running very very slow. As I presume, I believe that application is running the thread multiple time even if it has retrieved the image which leads to big lagging. I am aware of the ASync task but just out of curiosity and to check whether it can be done, I don't wish to implement it here. Here is the source code for MainActivity.
package com.example.contact;
import java.io.InputStream;
import java.util.ArrayList;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.app.ListActivity;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.AbsListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
public class MainActivity extends ListActivity {
ListView listview;
private boolean mPaused;
private MyAdapter mAdapter;
private View view;
private boolean running = false;
final private ArrayList<String> con_ids = new ArrayList<String>();
private Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
listview = getListView();
context = this;
Cursor c = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,
null,
null,
null,
ContactsContract.Contacts.DISPLAY_NAME+" ASC");
if(c!=null)
{
for(c.moveToFirst();!c.isAfterLast();c.moveToNext()){
con_ids.add(c.getString(c.getColumnIndex(ContactsContract.Contacts._ID)));
}
}
mAdapter = new MyAdapter(this, android.R.layout.simple_list_item_1, con_ids);
listview.setAdapter(mAdapter);
listview.setOnScrollListener(makeScrollListener());
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void setEnabled(boolean enabled) {
mPaused = !enabled;
}
private AbsListView.OnScrollListener makeScrollListener() {
return new AbsListView.OnScrollListener() {
#Override
public void onScrollStateChanged(AbsListView absListView, int scrollState) {
setEnabled(scrollState != AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
running = false;
}
#Override
public void onScroll(AbsListView absListView, int i, int i1, int i2) {
String log = "";
Log.d(log, "Scroll First Item" + i);
Log.d(log, ""+ listview.getChildCount());
final int want = i;
running = true;
runOnUiThread(new Thread(new Runnable() {
int totalChild = listview.getChildCount();
int first = listview.getFirstVisiblePosition() - listview.getHeaderViewsCount();
int toRetrieve = want-first;
int id;
long con_id;
Bitmap thumbnail;
final ListView list = listview;
#Override
public void run() {
// TODO Auto-generated method stub
while(running)
{
if(!(toRetrieve<0||toRetrieve>=totalChild))
{
id = want+toRetrieve;
con_id = Long.valueOf(con_ids.get(id));
Uri ContactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI, con_id);
InputStream stream = ContactsContract.Contacts.openContactPhotoInputStream(context.getContentResolver(), ContactUri);
thumbnail = BitmapFactory.decodeStream(stream);
if(thumbnail == null)
{
toRetrieve++;
continue;
}
else
{
View view = list.getChildAt(toRetrieve);
if(view == null)
{
toRetrieve++;
continue;
}
else
{
ImageView iamge = (ImageView) view.findViewById(R.id.contact_iamge);
iamge.setImageBitmap(thumbnail);
}
toRetrieve++;
}
}
else
{
running = false;
}
}
}
}));
}
};
}
}
Code for MyAdapter,
package com.example.contact;
import java.util.ArrayList;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView.FindListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class MyAdapter extends ArrayAdapter<String> {
private Context context;
private ListView listview;
private ArrayList<String> ids;
private LayoutInflater infl;
private String displayname;
private String maindetail;
private SimplifiedContact contact;
private Drawable drawable;
public MyAdapter(Context context, int ResourceId, ArrayList<String> list)
{
super(context, ResourceId, list);
this.context = context;
ids = list;
infl = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
drawable = context.getResources().getDrawable(R.drawable.person);
}
static class ViewHolder
{
public ImageView image;
public TextView display_name;
public TextView main_detail;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
contact = new SimplifiedContact(context, Long.valueOf(ids.get(position)));
if(row == null)
{
row = infl.inflate(R.layout.single_cell, parent, false);
ViewHolder viewHolder = new ViewHolder();
viewHolder.display_name =(TextView) row.findViewById(R.id.disp_name);
viewHolder.main_detail = (TextView) row.findViewById(R.id.main_detail);
viewHolder.image = (ImageView)row.findViewById(R.id.contact_iamge);
row.setTag(viewHolder);
}
ViewHolder holder = (ViewHolder) row.getTag();
holder.display_name.setText(contact.getDisplayName());
holder.main_detail.setText(contact.getMainDetail());
holder.image.setBackgroundDrawable(drawable);
return row;
}
}
I wish to know, how this lag can be reduced. Thanks in advance.
Why don't you try to take that Thread instance that you are making in runOnUiThread and put It in a field, initializing It in the onCreate. I think that you are creating several thread instaces with no use.
public class MainActivity extends ListActivity {
ListView listview;
private boolean mPaused;
private MyAdapter mAdapter;
private View view;
private boolean running = false;
final private ArrayList<String> con_ids = new ArrayList<String>();
private Context context;
Thread uiThread;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
listview = getListView();
context = this;
Cursor c = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,
null,
null,
null,
ContactsContract.Contacts.DISPLAY_NAME+" ASC");
if(c!=null)
{
for(c.moveToFirst();!c.isAfterLast();c.moveToNext()){
con_ids.add(c.getString(c.getColumnIndex(ContactsContract.Contacts._ID)));
}
}
uiThread = new Thread(new Runnable() {
int totalChild = listview.getChildCount();
int first = listview.getFirstVisiblePosition() - listview.getHeaderViewsCount();
int toRetrieve = want-first;
int id;
long con_id;
Bitmap thumbnail;
final ListView list = listview;
#Override
public void run() {
// TODO Auto-generated method stub
while(running)
{
if(!(toRetrieve<0||toRetrieve>=totalChild))
{
id = want+toRetrieve;
con_id = Long.valueOf(con_ids.get(id));
Uri ContactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI, con_id);
InputStream stream = ContactsContract.Contacts.openContactPhotoInputStream(context.getContentResolver(), ContactUri);
thumbnail = BitmapFactory.decodeStream(stream);
if(thumbnail == null)
{
toRetrieve++;
continue;
}
else
{
View view = list.getChildAt(toRetrieve);
if(view == null)
{
toRetrieve++;
continue;
}
else
{
ImageView iamge = (ImageView) view.findViewById(R.id.contact_iamge);
iamge.setImageBitmap(thumbnail);
}
toRetrieve++;
}
}
else
{
running = false;
}
}
}
});
mAdapter = new MyAdapter(this, android.R.layout.simple_list_item_1, con_ids);
listview.setAdapter(mAdapter);
listview.setOnScrollListener(makeScrollListener());
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void setEnabled(boolean enabled) {
mPaused = !enabled;
}
private AbsListView.OnScrollListener makeScrollListener() {
return new AbsListView.OnScrollListener() {
#Override
public void onScrollStateChanged(AbsListView absListView, int scrollState) {
setEnabled(scrollState != AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
running = false;
}
#Override
public void onScroll(AbsListView absListView, int i, int i1, int i2) {
String log = "";
Log.d(log, "Scroll First Item" + i);
Log.d(log, ""+ listview.getChildCount());
final int want = i;
running = true;
runOnUiThread(uiThread);
}
};
}
}
I want to display full screen image by clicking on the grid view item.I am done with grid view but no idea how to do this. Please give me some idea to do this??
Thanks....!
mGridView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v, int position,long id) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Image"+(position+1), Toast.LENGTH_SHORT).show();
Intent intent =new Intent(getApplicationContext(),MyImageViewActivity.class);
intent.putExtra("filename", i);
startActivity(intent);
}
});
MyGridView.java
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.KeyStore.LoadStoreParameter;
import com.myworkspace.R.menu;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.provider.ContactsContract.CommonDataKinds.Im;
import android.provider.MediaStore.Audio.Media;
import android.provider.SyncStateContract.Columns;
import android.sax.StartElementListener;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.Gallery;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class MyGridView extends Activity {
GridView mGridView;
int counter,i;
MyImageAdapter adapter = null;
ImageView imgVw;
Bitmap bitmap;
private Cursor cursor;
int columnIndex;
Integer[] mThumbsIds = {
R.drawable.image1,R.drawable.image2,
R.drawable.image3,R.drawable.image4,
R.drawable.image5,R.drawable.icon,
R.drawable.icon,R.drawable.icon,
R.drawable.icon
};
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.mygridacti);
ImageView imageview = (ImageView)findViewById(R.id.GalleryView);
mGridView = (GridView)findViewById(R.id.grdvw);
adapter = new MyImageAdapter(this);
adapter.notifyDataSetChanged();
mGridView.setAdapter(adapter);
mGridView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v, int position,long id) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Image"+(position+1), Toast.LENGTH_SHORT).show();
Intent myIntent = new Intent(MyGridView.this, MyImageViewActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("image", mThumbsIds[position]);
myIntent.putExtras(bundle);
startActivityForResult(myIntent, 0);
}
});
}
}
class MyImageAdapter extends BaseAdapter{
private Context mContext;
ImageView imageview;
int counter;
public MyImageAdapter(Context c){
mContext = c;
}
public MyImageAdapter(OnClickListener onClickListener) {
// TODO Auto-generated constructor stub
}
#Override
public int getCount() {
return mThumbsIds.length;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(final int position, final View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
if(convertView == null){
imageview = new ImageView(mContext);
imageview.setLayoutParams(new GridView.LayoutParams(85,85));
imageview.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageview.setPadding(8, 8, 8, 8);
counter++;
}
else{
imageview = (ImageView) convertView;
}
imageview.setImageResource(mThumbsIds[position]);
return imageview;
}
private Integer[] mThumbsIds = {
R.drawable.image1,R.drawable.image2,
R.drawable.image3,R.drawable.image4,
R.drawable.image5,R.drawable.icon,
R.drawable.icon,R.drawable.icon,
R.drawable.icon};
}
You know how to show images in gridView. after this perform action of
grid.setOnItemClickListener(new OnItemClickListener(){
Intent intent = new Intent
(getApplicationContext(), ViewImage.class);
intent.putExtra("filename", fileName);
//here fileName is something which tells the next activity about "selected image"
//It can be ImageLocation/ImageName/ImageID/ImageURL
startActivity(intent);
}
ViewImage.class
//here I assume that you send the ImageFile in the extra.
//so, converted it into bitmap and showed in the ImageView
Bundle extras = getIntent().getExtras();
BitmapFactory.Options bfo = new BitmapFactory.Options();
bfo.inSampleSize = 2;
filename = extras.getString("filename");
mBitmap = BitmapFactory.decodeFile(filename, bfo);
imageview.setbitmap(mbitmap);
You should do something like this in your setOnItemClickListener, I m using your code and improving it
mGridView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v, int position,long id) {
// use gridItem position to get the Image from mThumbsIds
int image = mThumsIds[position] // here I m passing the position of GridViewItem
Intent intent =new Intent(getApplicationContext(),MyImageViewActivity.class);
intent.putExtra("image", image);
startActivity(intent);
}
});
You do not need to pass Bundle if you are just sending a single Image ID
now in your ViewImage.class you can get the image from the intent using
I m using Glide to show you how to display this Image in ImageView
int image = getIntent().getIntExtra("image");
//now you can use this "image" variable to display image
ImageView imageView = findViewById(R.id.imageView);
Glide.with(this).load(image).into(imageView); // here pass you imageView in the last method as parameter
Hope this will help!
On itemClick, just pass the position
mGridView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v, int position,long id) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Image"+(position+1), Toast.LENGTH_SHORT).show();
Intent myIntent = new Intent(MyGridView.this, MyImageViewActivity.class);
myIntent.putInt("image", position);
startActivityForResult(myIntent, 0);
}
});
In other Activity,
public class MyImageViewActivity extends AppCompatActivity {
Integer[] mThumbsIds = {
R.drawable.image1,R.drawable.image2,
R.drawable.image3,R.drawable.image4,
R.drawable.image5,R.drawable.icon,
R.drawable.icon,R.drawable.icon,
R.drawable.icon
};
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_question7_spinner_background);
Intent intent = getIntent();
int position = intent.getIntExtra("image", 0);
int imageId = mThumbsIds[position];
}
}
I am new to coding and never worked with it before! We are working with Android and Java eclipse, it's a school project. Now I am working with a band application were I am supposed to create the gallery. This I managed, but to create a function were the user can set an image to a wallpaper, I couldn't. I need some help with this! I believe I found good code, but I don't know how to implement it in my work.
Does anyone know how I should connect these to each other? Really thankful for help,
Sandra
My Gallery code:
package com.Lavin;
import com.Lavin.R;
import java.io.IOException;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.Gallery.LayoutParams;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.app.WallpaperManager;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
public class Lavin extends Activity implements
AdapterView.OnItemSelectedListener, ViewSwitcher.ViewFactory {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
mSwitcher = (ImageSwitcher) findViewById(R.id.switcher);
mSwitcher.setFactory(this);
mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_in));
mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_out));
Gallery g = (Gallery) findViewById(R.id.gallery);
g.setAdapter(new ImageAdapter(this));
g.setOnItemSelectedListener(this);
}
public void onItemSelected(AdapterView parent, View v, int position, long id) {
mSwitcher.setImageResource(mImageIds[position]);
}
public void onNothingSelected(AdapterView parent) {
}
public View makeView() {
ImageView i = new ImageView(this);
i.setBackgroundColor(0xFF000000);
i.setScaleType(ImageView.ScaleType.FIT_CENTER);
i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT));
return i;
}
private ImageSwitcher mSwitcher;
public class ImageAdapter extends BaseAdapter {
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);
i.setImageResource(mThumbIds[position]);
i.setAdjustViewBounds(true);
i.setLayoutParams(new Gallery.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
i.setBackgroundResource(R.drawable.picture_frame);
return i;
}
private Context mContext;
}
private Integer[] mThumbIds = {
R.drawable.lavin_thumb_0, R.drawable.lavin_thumb_1,
R.drawable.lavin_thumb_2, R.drawable.lavin_thumb_3,
R.drawable.lavin_thumb_4, R.drawable.lavin_thumb_5,
R.drawable.lavin_thumb_6, R.drawable.lavin_thumb_7,
R.drawable.lavin_thumb_8, R.drawable.lavin_thumb_9,
R.drawable.lavin_thumb_10, R.drawable.lavin_thumb_11,
R.drawable.lavin_thumb_12};
private Integer[] mImageIds = {
R.drawable.lavin_0, R.drawable.lavin_1, R.drawable.lavin_2,
R.drawable.lavin_3, R.drawable.lavin_4, R.drawable.lavin_5,
R.drawable.lavin_6, R.drawable.lavin_7, R.drawable.lavin_8,
R.drawable.lavin_9, R.drawable.lavin_10,
R.drawable.lavin_11, R.drawable.lavin_12};
}
My Wallpaper code:
package com.Lavin;
import android.app.Activity;
import android.os.Bundle;
import java.io.IOException;
import android.app.Activity;
import android.app.WallpaperManager;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
public class Wallpaper extends Activity {
final static private int[] mColors =
{Color.BLUE, Color.GREEN, Color.RED, Color.LTGRAY, Color.MAGENTA, Color.CYAN,
Color.YELLOW, Color.WHITE};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
final Drawable wallpaperDrawable = wallpaperManager.getDrawable();
final ImageView imageView = (ImageView) findViewById(R.id.imageview);
imageView.setDrawingCacheEnabled(true);
imageView.setImageDrawable(wallpaperDrawable);
Button randomize = (Button) findViewById(R.id.randomize);
randomize.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
int mColor = (int) Math.floor(Math.random() * mColors.length);
wallpaperDrawable.setColorFilter(mColors[mColor], PorterDuff.Mode.MULTIPLY);
imageView.setImageDrawable(wallpaperDrawable);
imageView.invalidate();
}
});
Button setWallpaper = (Button) findViewById(R.id.setwallpaper);
setWallpaper.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
try {
wallpaperManager.setBitmap(imageView.getDrawingCache());
finish();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
public class LoadImagesFromSDCardActivity extends Activity implements
OnItemClickListener {
/**
* Grid view holding the images.
*/
private GridView sdcardImages;
/**
* 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.sdcard);
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(LoadImagesFromSDCardActivity.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;
Uri uri = null;
// Set up an array of the Thumbnail Image ID column we want
String[] projection = {MediaStore.Images.Thumbnails._ID};
// Create the cursor pointing to the SDCard
Cursor cursor = managedQuery( MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
projection, // Which columns to return
null, // Return all rows
null,
null);
int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
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
}
int imageID = 0;
for (int i = 0; i < size; i++) {
cursor.moveToPosition(i);
imageID = cursor.getInt(columnIndex);
uri = Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, "" + imageID);
try {
bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));
if (bitmap != null) {
newBitmap = Bitmap.createScaledBitmap(bitmap, 70, 70, true);
bitmap.recycle();
if (newBitmap != null) {
publishProgress(new LoadedImage(newBitmap));
}
}
} catch (IOException e) {
//Error fetching image, try to recover
}
}
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 ArrayList<LoadedImage> photos = new ArrayList<LoadedImage>();
public ImageAdapter(Context context) {
mContext = context;
}
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 View getView(int position, View convertView, ViewGroup parent) {
final ImageView imageView;
if (convertView == null) {
imageView = new ImageView(mContext);
} else {
imageView = (ImageView) convertView;
}
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setPadding(8, 8, 8, 8);
imageView.setImageBitmap(photos.get(position).getBitmap());
return imageView;
}
}
/**
* 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 = {MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery( MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
projection,
null,
null,
null);
if (cursor != null) {
columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToPosition(position);
String imagePath = cursor.getString(columnIndex);
FileInputStream is = null;
BufferedInputStream bis = null;
try {
is = new FileInputStream(new File(imagePath));
bis = new BufferedInputStream(is);
Bitmap bitmap = BitmapFactory.decodeStream(bis);
Bitmap useThisBitmap = Bitmap.createScaledBitmap(bitmap, parent.getWidth(), parent.getHeight(), true);
bitmap.recycle();
//Display bitmap (useThisBitmap)
}
catch (Exception e) {
//Try to recover
}
finally {
try {
if (bis != null) {
bis.close();
}
if (is != null) {
is.close();
}
cursor.close();
projection = null;
} catch (Exception e) {
}
}
}
}
}
The sdcard.xml file:
<GridView
android:id="#+id/sdcard"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:gravity="center" />