Using intents to click on an element from the RecyclerView, with a small image on each element, to go to another screen/activity which will show the enlarge picture.
For example, Textview has setText and getText.
How about ImageView? They have setImageResource but I am trying to now get the image resource
There is no method that will give you ImageResource.
You can check ImageView source code. They just convert your ImageResource to Drawable and use it. So you have a getter method for Drawable imageView.getDrawable();. This is only what you can get. There is no getter for getting resource id from Drawable object.
if (mResource != 0) {
try {
d = mContext.getDrawable(mResource);
} catch (Exception e) {
Log.w(LOG_TAG, "Unable to find resource: " + mResource, e);
// Don't try again.
mResource = 0;
}
}
Solution 1 From ref
If you want pass Image to another Activity, you can do this.
When you set ImageView resource in Adapter then set a Tag on this.
imageView0.setTag(R.drawable.apple);
Now when you want get that id when user click, then only do
private int getDrawableId(ImageView iv) {
return (Integer) iv.getTag();
}
Solution 2
If you are one setting ImageView resource, then you would have this resource integer in your List?, so when user click then get resource again like
yourList.get(getAdapterPosition).getImageId();
You can programmatically set your first ImageView's tag to the resource id, and then retrieve it later with getTag() to set as the resource id of the new ImageView.
For instance:
//First set your original image tag...
ImageView original; //The original ImageVew
Integer resId = R.drawable.resource; //The original resource
original.setTag(resId); //Add your resource id to the tag
//Then, to get the resource id...
Integer resId = original.getTag();
Related
I have an Activity which has variable position that comes from another activity. I handle this variable with Intent like below. (Actually position is listView's position from another activity.) and values of position variable are 0 to 200
I took my Extra, then assigned it to a string than I parsed it to an Integer. These are normal and easy for me and working.
Intent i = getIntent();
String position = i.getStringExtra("POSITION");
int position_to_int = Integer.parseInt(position);
But my problem is about resources.
Simply I want to put an image to my LinearLayout dynamically . I have some country flags and they named in format like 0.gif, 1.gif, 2.gif, 3.gif ...
My idea is using position variable's value for this purpose.
but when I try to use position_to_int variable for name of flag, Eclipse returning error normally. Because R.drawble.XXX values storing in R.java
ImageView imageView = new ImageView(this);
// setting image resource
imageView.setImageResource(R.drawable.position_to_int);
How can I use position_to_int variable to show an ImageView dynamically?
You can't access it directly. You'll have to get the resource using its name:
private Drawable getDrawableResourceByName(int name) {
String packageName = getPackageName();
int resId = getResources().getIdentifier("character_you_prefixed" + String.valueOf(name), "drawable", packageName);
return getResources().getDrawable(resId);
}
Note that your resource names must begin with a letter, not a number, or else your project will not compile. Try adding a character to the beginning of each file name.
I am working on Application in which I want to access the id of image from R.java which is used by imageView.
for examle
imageView i;
i=(ImageView)findViewbyid(imageview1);
i.setImageResource(R.drawble.human);
.....
now i want to know which id is used by i in running application.
//when you place an image in you drawable it will generate an Id in R.java file
when you want that particular image to display in your ImageView
you need to declare like this
public static Integer[] images = new Integer[]{R.drawable.my_love,R.drawable.first,R.drawable.second,R.drawable.third};
And then set the image resource like this,
ImageView i = new ImageView(this.context);
i.setImageResource(this.images[1]);
//you have declared as
imageView i=(ImageView)findViewbyid(imageview1);
//what is this imageview1?
instead of that you need to give your xml declaration ImageView id as
imageView i=(ImageView)findViewbyid(R.id.imageview);
If you are looking for a method to get the Image Background of a ImageView this will help you.
ImageView imageView=(ImageView)findViewById(R.id.image);
imageView.setBackgroundResource(R.drawable.ic_launcher);
imageView.setDrawingCacheEnabled(true);
Drawable d=imageView.getBackground();
This will give you the id of the image in drawable
String mDrawableName =Integer.toString( R.drawable.human);
int resID = getResources().getIdentifier(mDrawableName , "drawable", getPackageName());
My Question is how to change image id from drawable folder in setImageResource() in android.
My drawable folder contains icon0.png to icon9.png and i want to change these images in image view dynamically using this
ImageView iV3;
iV3 = (ImageView) findViewById(R.id.imageView3);
iV3.setImageResource(R.drawable.icon + speed_Arr[2]);
speed_Arr[2] contains any value from 0 - 9.
But this didnt change images.
Plz help me out.
regards.
public static int getIdentifier(Context context, String name)
{
return context.getResources().getIdentifier(name.substring(0, name.lastIndexOf(".")), "drawable", context.getPackageName());
}
Above code will return the resource id from name String.
int res = getResources().getIdentifier("< packageName:drawable/imageName >'", null, null);
Use this res in your iV3.
say I want to dynamically load an image file in R.drawable.* based on the value of a string
Is there a way to do this? It seems like I need to statically refer to anything in R.
Have you declared the id for the image in XML file? If you did, you can use the following method:
Let's say you have picture.png in your res/drawable folder.
In your activity, you can set your image resource in the main.xml file
<ImageView android:id="#+id/imageId" android:src="#drawable/picture"></ImageView>
In FirstActivity
//to retrieve image using id set in xml.
String imageString = "imageId"
int resID = getResources().getIdentifier(imageString , "id", "package.name");
ImageView image = (ImageView) findViewById(resID);
imageString is the dynamic name. After which you can get the identifier of the dynamic resource.
Another method, you can do this:
//to retrieve image in res/drawable and set image in ImageView
String imageName = "picture"
int resID = getResources().getIdentifier(imageName, "drawable", "package.name");
ImageView image;
image.setImageResource(resID );
You will be able to reference your image resource and set your ImageView to it.
int drawableId = getResources().getIdentifier(drawablename, "drawable", getPackageName());
imageview.setImageResource(drawableId);
Try this. This should work.
Class res = R.string.class;
Field field = res.getField("x" + pos);
headerId = field.getInt(null);
header.setText(headerId);
this works with drawables as well, just edit the string. the header part is not required, it's just an example pulled from something I wrote a while ago.
I have a a set of 10 imageviews in my layout. I have given them sequential id's also as
android:id="#+id/pb1"
android:id="#+id/pb2"
Now I want to change background dynamically.
int totalPoi = listOfPOI.size();
int currentPoi = (j/totalPoi)*10;
for (i=1;i<=currentPoi;i++) {
imageview.setBackgroundResource(R.drawable.progressgreen);
}
Now inside the for loop I want to set the image view background dynamically. i,e if the currentpoi value is 3, background of 3 image views should be changed. What ever the times the for loop iterates that many image view's background should be changed. Hope the question is clear now.
Note : I have only 1 image progressgreen that need to be set to 10 image views
Finally I did this in the following way,
I placed all the id's in the array as
int[] imageViews = {R.id.pb1, R.id.pb2,R.id.pb3,R.id.pb4,R.id.pb5,R.id.pb6,R.id.pb7,R.id.pb8,R.id.pb9,R.id.pb10};
Now:
int pindex = 0;
for (pindex; pindex <currentPoi; pindex++) {
ImageView img = (ImageView) findViewById(imageViews[pindex]) ;
img.setImageResource(R.drawable.progressgreen);
}
Now, I am able to change the images dynamically.
#goto10. Thanks for your help. I will debug your point to see what went wrong in my side
Create an ImageView array:
ImageView views[] = new ImageView[10];
views[0] = (ImageView)findViewById(R.id.pb1);
...
views[9] = (ImageView)findViewById(R.id.pb10);
Now iterate the loop to set the background of images like this:
for (i=1;i<=currentPoi;i++)
{
views[i-1].setBackgroundResource(R.drawable.progressgreen);
}
you can do this by setting the name of drawables something like:
img_1, img_2, img_3...
for (i=1;i<=currentPoi;i++)
{
ImageView imageview=(ImageView) findViewById(getResources().getIdentifier("imgView_"+i, "id", getPackageName()));
imageview.setImageResource(getResources().getIdentifier("img_"+i, "drawable", getPackageName()));
}
Try this code.....
Create image Array..
private Integer[] mThumbIds = { R.drawable.bg_img_1, R.drawable.bg_img_2,
R.drawable.bg_img_3, R.drawable.bg_img_4, R.drawable.bg_img_5 };
And than modify your code
int totalPoi = listOfPOI.size();
int currentPoi = (j/totalPoi)*10;
for (i=1;i<=currentPoi;i++) {
imageview.setBackgroundResource(mThumbIds[i]);}
You could make an array of your ImageViews and then change them in your for loop.
ImageView views[] = new ImageView[10];
views[0] = (ImageView)findViewById(R.id.imageView0);
...
views[9] = (ImageView)findViewById(R.id.imageView9);
and then change your for loop to:
for (i=1;i<=currentPoi;i++) {
views[currentPoi].setBackgroundResource(R.drawable.progressgreen);
}
Arrays start at index 0, so make sure there's not an off-by-one error in here.
You'll need to give your ImageViews sequential ids, such as "#+id/pb1" and "#+id/pb2", etc.. Then you can get each of them in the loop like this:
for (i=1;i<=currentPoi;i++) {
// Find the image view based on it's name. We know it's pbx where 'x' is a number
// so we concatenate "pb" with the value of i in our loop to get the name
// of the identifier we're looking for. getResources.getIdentifier() is able to use
// this string value to find the ID of the imageView
int imageViewId = getResources().getIdentifier("pb" + i, "id", "com.your.package.name");
// Use the ID retrieved in the previous line to look up the ImageView object
ImageView imageView = (ImageView) findViewById(imageViewId);
// Set the background for the ImageView
imageView.setBackgroundResource(R.drawable.progressgreen);
}
Replace com.your.package.name with your application's package.