Stack Trace
Picture of stack trace here
Values aren't being passed to the other intent. Every time I try to start the activity with the intent in it, it crashes.
//This activity will retrieve and display the different rewards that are available.
public class RewardsActivity extends Activity {
#Override
public void onCreate(Bundle SavedInstanceState)
{
super.onCreate(SavedInstanceState);
setContentView(R.layout.rewards);
//stores retrieves and stores the current gridview
GridView gridView = (GridView)findViewById(R.id.grid_view);
//Instance of ImageAdapter class that will load the images into the gridview
gridView.setAdapter(new ImageAdapter(this));
//This function is used to set a listener on each item in the grid so that when its clicked it will go to the other view.
gridView.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View v,int position, long id)
{
Intent i = new Intent(getApplicationContext(),RewardsViewActivity.class);
i.putExtra("id", position);
startActivity(i);
}
});
}
This new intent is being passed to, when it's passed here it is stored in a variable then used in a ImageView to load an image.
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ImageView;
public class RewardsViewActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.full_view);
// get intent data
Intent i = getIntent();
// Selected image id
int position = i.getExtras().getInt("id");
ImageAdapter imageAdapter = new ImageAdapter(this);
ImageView imageView = (ImageView) findViewById(R.id.full_image);
imageView.setImageResource(imageAdapter.finalImages[position]);
}
}
ImageAdapter.java
package org.android.pps;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
/*This class will be used handle the loading of the image view that will display all the
images of the rewards. (this will be used along with RewardsActivity and rewards.xml)
*/
public class ImageAdapter extends BaseAdapter {
//variable that will store the current context of the application
private Context c;
private Integer num = 6;
private int[] rewards_num=new int[num];
private Integer[] Images = new Integer[6];
public Integer[] finalImages;
//for loop will set the correct image to the array if its either activated or deactivated
public Integer[] fillImageArray()
{
//Array that will be used to show the reward images
Integer[] Activated ={
R.drawable.rewards1,
R.drawable.rewards2,
R.drawable.rewards3,
R.drawable.rewards4,
R.drawable.rewards5,
R.drawable.rewards6,
};
Integer[] Deactivated ={
R.drawable.rewards1b,
R.drawable.rewards2b,
R.drawable.rewards3b,
R.drawable.rewards4b,
R.drawable.rewards5b,
R.drawable.rewards6b,
};
//for loop that checks to see all the rewards that a particular users has to assign a particular image.
for(int x = 0;x<rewards_num.length;x++)
{
for(int y = 0;y<6;y++)
{
if(rewards_num[x]==y)
{
Images[x]=Activated[y];
}
else
{
Images[x]=Deactivated[y];
}
}
}
return Images;
}
//constructor with the context being passed.
public ImageAdapter(Context m)
{
c = m;
}
public int getCount() {
return 6;
}
public Object getItem(int position) {
return Images[position];
}
public long getItemId(int position) {
return 0;
}
// The function View create a new ImageView for each item that is being referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
finalImages = fillImageArray();
ImageView imageView = new ImageView(c);
imageView.setImageResource(finalImages[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(300, 300));
return imageView;
}
}
finalImages in noi initialized there .........
it is finalImages in the getview which is not get called in 2nd activity (RewardsViewActivity )...........
if possible move this line to constructor finalImages = fillImageArray();
Related
I am trying to retrieve the image resource file in another class, the intent putExtra has been placed in the MainActivity but I'm not sure how to retrieve that in the other class? I've tried getIntent().getIntExtra("category", search_name); but I just get errors. The idea is that the user claiks on the photo of a recipe category and then in the other class I can match that resource image file to the category name and retrieve the corresponding recipes.
Also this gridview slows down the app, how would I wrap and call this in an Async?
MainActivity
GridView gv = findViewById(R.id.gridview);
gv.setAdapter(new SetImageAdapter(this));
gv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Intent intent = new Intent(MainActivity.this, Category.class);
intent.putExtra("Category", SetImageAdapter.categories[position]); // put image data in Intent
startActivity(intent); // start Intent
}
});
GridView Adapter
package com.stu54259.plan2cook;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class SetImageAdapter extends BaseAdapter {
public static Integer[] categories = {
R.drawable.african, R.drawable.american,
R.drawable.asian, R.drawable.comfort,
R.drawable.desserts, R.drawable.greek,
R.drawable.italian, R.drawable.vegetarian,
R.drawable.mexican,
};
private Context Cont;
public SetImageAdapter(Context c) {
Cont = c;
}
public int getCount() {
return categories.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imgview = new ImageView(Cont);
imgview.setLayoutParams(new GridView.LayoutParams(370, 250));
imgview.setScaleType(ImageView.ScaleType.CENTER_CROP);
imgview.setPadding(10,10,10, 10);
imgview.setImageResource(categories[position]);
return imgview;
}
}
In your MainActivity :
GridView gv = findViewById(R.id.gridview);
gv.setAdapter(new SetImageAdapter(this));
gv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Intent intent = new Intent(MainActivity.this, Category.class);
intent.putExtra("CategoryPosition", position); // put image data in Intent
startActivity(intent); // start Intent
}
});
In your Category activity :
int position = getIntent().getIntExtra("CategoryPosition",0);
int selectedDrawable = SetImageAdapter.categories[position];
//Get name of the selected drawable :
String search_name = getResources().getResourceEntryName(selectedDrawable);
The possibility reason why the performance of your GridView is slow is the drawable resource size, make sure that all image used has a small resolution as well as smaller size.
I have prepared a grid view in a fragment which shows images and when you click on them it shows the image in another Activity. I want the name of the image to be shown below it for that i took a textview but it shows position. How to show the name of the photo choosen from grid view on that textview. Below is the code fragments.
full_image_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView android:id="#+id/full_image_view"
android:layout_width="500dp"
android:layout_height="500dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="#+id/image_title"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
FullImageFragment
package com.androidbelieve.HIT_APP;
import android.app.Activity;
/**
* Created by Akash on 2/13/2016.
*/
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;
public class FullImageFragment extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.full_image_layout);
// get intent data
Intent i = getIntent();
// Selected image id
int position = i.getExtras().getInt("id");
ImageAdapter imageAdapter = new ImageAdapter(this);
ImageView imageView = (ImageView) findViewById(R.id.full_image_view);
imageView.setImageResource(imageAdapter.mThumbIds[position]);
TextView textView = (TextView) findViewById(R.id.image_title);
textView.setText(String.valueOf(position));
}
}
GalleryFragment
package com.androidbelieve.HIT_APP;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.ImageView;
/**
* Created by Ratan on 7/29/2015.
*/
public class GalleryFragment extends Fragment {
private GridView gridView;
private ImageView imageView;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View view = inflater.inflate(R.layout.fragment_gallery_grid, container,
false);
GridView gridView = (GridView) view.findViewById(R.id.grid_view);
gridView.setAdapter(new ImageAdapter(view.getContext()));
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent i = new Intent(getActivity(),FullImageFragment.class);
i.putExtra("id",position);
startActivity(i);
}
});
return view;
}
}
Please Help Me Out!!!
ImageAdapter
package com.androidbelieve.HIT_APP;
/**
* Created by Akash on 2/13/2016.
*/
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import java.util.ArrayList;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
// Keep all Images in array
public Integer[] mThumbIds = {
R.drawable.akash, R.drawable.akash,
R.drawable.akash , R.drawable.akash,
};
// Constructor
public ImageAdapter(Context c){
mContext = c;
}
#Override
public int getCount() {
return mThumbIds.length;
}
#Override
public Object getItem(int position) {
return mThumbIds[position];
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
imageView.setImageResource(mThumbIds[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(200, 200));
return imageView;
}
}
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent i = new Intent(getActivity(),FullImageFragment.class);
i.putExtra("id",position);
i.putExtra("image_name",arrayImageName[position]); // get your selected image name and pass it
startActivity(i);
}
});
In your image display class,
String name = i.getExtras().getString("image_name");
TextView textView = (TextView) findViewById(R.id.image_title);
textView.setText(name);
You can do this way:
// Keep all Images in array
public Integer[] mThumbIds = {
R.drawable.akash, R.drawable.akash,
R.drawable.akash , R.drawable.akash,
};
public String[] mThumbNames = {
"akash 0", "akash 1","akash 2", "akash 3",
};
In Next Activity:
TextView textView = (TextView) findViewById(R.id.image_title);
textView.setText(imageAdapter.mThumbNames[position])
Edit 1:
private class CustomClass{
public int drawable;
public String title;
public String information;
}
ArrayList<CustomClass> listCustom = new ArrayList<>();
Integer[] mThumbIds = {
R.drawable.akash, R.drawable.akash,
R.drawable.akash , R.drawable.akash,
};
String[] mThumbNames = {
"akash 0", "akash 1","akash 2", "akash 3",
};
String[] mThumbInfos = {
"akash 0 Info", "akash 1 Info","akash 2 Info", "akash 3 Info",
};
for (int i = 0; i < mThumbIds.length; i++) {
CustomClass customClass = new CustomClass();
customClass.drawable = mThumbIds[i];
customClass.title = mThumbNames[i];
customClass.information = mThumbInfos[i];
listCustom.add(customClass);
}
Hope this will help you.
I think you want something like this?
Hiren Patel has already answered that. I am just putting it in steps.
1) create 'CustomClass' which will act as POJO class to structure your image name, resource reference.
2) Create an adapter with extends ArrayAdapter and take 'CustomClass' as argument
3) In your activity, create a list of that class and load the data (Image name, resource id etc)
4)Initialize your adapter with above list (can be array as well)
5) access that values on getView method of adapter
i am working on a image GridView app in which i am adding images in array from drawable, but now i want to add images in array from sd card.
note: i want to add images from specific folder like: "sdcard/android/data/com.example.images"
GridView Class
package com.example.androidhive;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
public class AndroidGridLayoutActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.grid_layout);
GridView gridView = (GridView) findViewById(R.id.grid_view);
// Instance of ImageAdapter Class
gridView.setAdapter(new ImageAdapter(this));
/**
* On Click event for Single Gridview Item
* */
gridView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
// Sending image id to FullScreenActivity
Intent i = new Intent(getApplicationContext(),
FullImageActivity.class);
// passing array index
i.putExtra("id", position);
startActivity(i);
}
});
}
}
ImageAdapter Class:
package com.example.androidhive;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
// Keep all Images in array
public Integer[] mThumbIds = {
// R.string.http_icons_iconarchive_com_icons_martz90_circle_512_android_icon_png
R.drawable.pic_1, R.drawable.pic_2, R.drawable.pic_3,
R.drawable.pic_4, R.drawable.pic_5, R.drawable.pic_6,
R.drawable.pic_7, R.drawable.pic_8, R.drawable.pic_9,
R.drawable.pic_10, R.drawable.pic_11, R.drawable.pic_12,
R.drawable.pic_13, R.drawable.pic_14, R.drawable.pic_15 };
// Constructor
public ImageAdapter(Context c) {
mContext = c;
}
#Override
public int getCount() {
return mThumbIds.length;
}
#Override
public Object getItem(int position) {
return mThumbIds[position];
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
imageView.setImageResource(mThumbIds[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(70, 70));
return imageView;
}
}
example of what i want:
// Keep all Images in array
public Integer[] mThumbIds = {
// how to add images from sd card here
};
how do i add images to array from sd card instead of drawable.
Just put all filenames from that specific folder in a ArrayList<String>. Then change getView() a bit to let the ImageView load from file.
You can create a Drawable from a Bitmap, you should check out a library like "Universal Image Loader" and then use
Drawable d = new BitmapDrawable(getResources(),bitmap);
Hi I'm trying to create a GridView using images from an online depository using Picasso.
I also want the user to be able to click on the image and it load up full screen to view.
So far I have managed to get it working almost perfectly. The only problem is the image that shows when they click on the grid is not the one that they clicked on, in fact it randomly chooses an image each time.
I was hoping somebody could take a look at my code and tell me where I am going wrong.
Thanks.
So this is my MainActivity class:
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView gv = (GridView) findViewById(R.id.grid_view);
gv.setAdapter(new GridViewAdapter(this));
gv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
// Sending image id to FullScreenActivity
Intent i = new Intent(getApplicationContext(), FullImageActivity.class);
// passing array index
i.putExtra("id", position);
startActivity(i);
}
});
}
}
This is my GridView class:
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import static android.widget.ImageView.ScaleType.CENTER_CROP;
final class GridViewAdapter extends BaseAdapter {
final Context context;
final List<String> urls = new ArrayList<String>();
public GridViewAdapter(Context context) {
this.context = context;
// Ensure we get a different ordering of images on each run.
Collections.addAll(urls, Info.URLS);
Collections.shuffle(urls);
// Triple up the list.
ArrayList<String> copy = new ArrayList<String>(urls);
urls.addAll(copy);
urls.addAll(copy);
}
#Override public View getView(int position, View convertView, ViewGroup parent) {
SquaredImageView view = (SquaredImageView) convertView;
if (view == null) {
view = new SquaredImageView(context);
view.setScaleType(CENTER_CROP);
}
// Get the image URL for the current position.
String url = getItem(position);
// Trigger the download of the URL asynchronously into the image view.
Picasso.with(context) //
.load(url) //
.placeholder(R.drawable.placeholder) //
.error(R.drawable.error) //
.fit() //
.into(view);
return view;
}
#Override public int getCount() {
return urls.size();
}
#Override public String getItem(int position) {
return urls.get(position);
}
#Override public long getItemId(int position) {
return position;
}
}
And finally my FullScreen Class:
import com.squareup.picasso.Picasso;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ImageView;
public class FullImageActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.full_image);
// get intent data
Intent i = getIntent();
// Selected image id
int position = i.getExtras().getInt("id");
GridViewAdapter ia = new GridViewAdapter(this);
ImageView iv = (ImageView) findViewById(R.id.full_image_view);
Picasso.with(this) //
.load(ia.getItem(position)) //
.placeholder(R.drawable.placeholder) //
.error(R.drawable.error) //
.fit()
.centerCrop()//
.into(iv);
}
}
I believe this is your culprit:
Collections.addAll(urls, Info.URLS);
Collections.shuffle(urls); // this reshuffles on every new instance
GridViewAdapter ia = new GridViewAdapter(this); // your full screen activity is creating a new instance.
Since I cannot comment yet, the answer is No. When you say startActivity, it will create a new instance of the FullScreenActivity, and then in that FullScreenActivity you are also instantiating a new Adapter which in turn does the shuffle work.
Please put in a breakpoint if you are in doubt.
You reinitialized the adapter for whatever reason here GridViewAdapter ia = new GridViewAdapter(this); That's when the shuffling occurs, in the constructor.
You should not have an adapter in your 2nd Activity. Adapters are for lists. You should simply pass that Activity the image URL.
GridView gv = (GridView) findViewById(R.id.grid_view);
GridViewAdapter adapter = new GridViewAdapter(this);
gv.setAdapter(adapter);
gv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
// Sending image url to FullScreenActivity
Intent i = new Intent(getApplicationContext(), FullImageActivity.class);
i.putExtra("url", adapter.getItem(position));
startActivity(i);
}
});
and
public class FullImageActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.full_image);
// get intent data
Intent i = getIntent();
string url = i.getExtras().getString("url");
ImageView iv = (ImageView) findViewById(R.id.full_image_view);
Picasso.with(this) //
.load(url) //
.placeholder(R.drawable.placeholder) //
.error(R.drawable.error) //
.fit()
.centerCrop()//
.into(iv);
}
}
You are creating an adapter twice - once in MainActivity, second time in FullImageActivity. Each time it is created shuffled, that's the reason. Nice copy-paste from Picasso sample btw ;)
I'm using a Gallery view in my app. The app is designed so that I can drag and drop a view from that Gallery.
How can I remove the dragged view from the Gallery?
You remove it from the underlying adapter. If you do this correctly, the Gallery will refresh itself. Otherwise, call notifyDataSetChanged() on the adapter to trigger a Gallery update.
If you override ImageAdapter you can modify the contents at will by adding methods to delete or add items to your image list(s) or in the case of the example, completely swap lists on the fly. I am displaying a app banner at startup, and then changing the Gallery to display the mode the app is in as a slider. Whenever you call a method that modifies the dataset in the ImageAdapter, call imageAdapter.notifyDataSetChanged() as CommonsWare says above :
// in onCreate
_gallery = (Gallery) this.findViewById(R.id.gallery_header);
_imageAdapter = new ImageAdapter(getApplicationContext(),screen_width,screen_height);
_imageAdapter.setBannerMode(true);
_gallery.setAdapter(_imageAdapter);
// the main activity, in my case in a message handler.
_imageAdapter.setBannerMode(false);
_imageAdapter.notifyDataSetChanged();
_gallery.setSelection(0,true);
// this is my extended image adapter class
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
public class ImageAdapter extends BaseAdapter
{
private Context _context = null;
private int[] imageIds = { R.drawable.add_banner,R.drawable.subtract_banner,R.drawable.multiply_banner,R.drawable.divide_banner };
private int[] bannerIds = { R.drawable.mathpiggie_banner };
private static boolean bannerEnabled = true;
int _screen_width;
int _screen_height;
public ImageAdapter(Context context, int screen_width, int screen_height) {
this._context = context;
_screen_width = screen_width;
_screen_height = screen_height;
}
public void setBannerMode(boolean val)
{
bannerEnabled = val;
}
#Override
public int getCount()
{
if (bannerEnabled)
return bannerIds.length;
else
return imageIds.length;
}
#Override
public Object getItem(int index)
{
if (bannerEnabled)
return bannerIds[index];
else
return imageIds[index];
}
#Override
public long getItemId(int index)
{
return index;
}
#Override
public View getView(int postion, View view, ViewGroup group)
{
ImageView imageView = new ImageView(_context);
if (bannerEnabled)
imageView.setImageResource(bannerIds[postion]);
else
imageView.setImageResource(imageIds[postion]);
return imageView;
}
}