I try access to drawable resource that I put in hashmap object
this is my relevant code:
private void pairImagesCollection() {
mImages.put(R.drawable.img1, R.drawable.img1shadow);
mImages.put(R.drawable.img2, R.drawable.img2shadow);
mImages.put(R.drawable.img3, R.drawable.img3shadow);
mImages.put(R.drawable.img4, R.drawable.img4shadow);
}
private void checkMatch(View dragView, View view) {
ImageView target = (ImageView) view;
ImageView dragged = (ImageView) dragView;
Drawable image = dragged.getDrawable();
int imgId = mImages.get(Integer.valueOf(image)); // wrong, I don't know how to do it ?!
target.setImageResource(imgId);
}
Any help will be appraised!
You can use Iterator
Iterator itObj = hashMapOBJ.entrySet().iterator();
while (itObj .hasNext()) {
Map.Entry pair = (Map.Entry) itObj.next();
String Key = (String) pair.getKey();
Drawable Value = (Drawable) pair.getValue();
hashMapOBJ.put(Key, Value);
System.out.println("Key: " + Key + "------>" + Value);
}
int imgId = mImages.get(Integer.valueOf(image));
You cannot get Resource/Drawable Id from ImageView through Drawable. With codes above, You can set tag for ImageView dragged. After that get value with with your mImages.
Before you checkMatch, you set tag for dragView as Drawble, something like that:
dragged.setTag(R.drawable.img1);
And now you can getDrawableId and
imgId = getDrawableId(dragged);
private int getDrawableId(ImageView iv) {
return (Integer) iv.getTag();
}
You got a hashmap that stores references to an image and its shadow right?
Which image you want to put on the image view? You have to iterate through your map and put the image you want:
Iterator iterator = map.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry pair = (Map.Entry)iterator.next();
System.out.println(pair.getKey() + " = " + pair.getValue());
}
If you want to put the value image then you put the pair.getKey() else you put the pair.getValue().
target.setImageResource(R.drawable.xxx);
Related
Suppose we have :
ImageView imageView_A = findViewById(R.id.imageview_dhze);
ImageView imageView_B = findViewById(R.id.imageview_dhhkjhkze);
ImageView imageView_C = findViewById(R.id.imageview_dhkhkjze);
ImageView imageView_D = findViewById(R.id.imageview_dhhuihuybze);
I want to make a function like this :
changeImages(String NAME) {
imageView_1_NAME.setImageResource(R.drawable.img);
imageView_2_NAME.setImageResource(R.drawable.img);
imageView_3_NAME.setImageResource(R.drawable.img);
}
And for example, I could use it like this :
changeImage("A");
to obtain :
imageView_1_A.setImageResource(R.drawable.img);
imageView_2_A.setImageResource(R.drawable.img);
imageView_3_A.setImageResource(R.drawable.img);
It is possible ? How can I do that ?
You could put all the ImageViews in a HashMap like this:
HashMap<String, ImageView> imageViews = new HashMap<>();
Then you add the ImageViews to the HashMap:
imageViews.put("A", imageView_A);
imageViews.put("B", imageView_B);
...
And your function could look like this then:
private void changeImage(String name) {
imageViews.get(name).setImageResource(R.drawable.img);
}
In this case you should only call changeImage() when the HashMap contains a key with the same value of String name. If you are not sure if a key exists you need to check if imageViews.containsKey(name) first.
You can do that:
void changeImage(String NAME) {
int imageId = this.getResources().getIdentifier("imageView_" + NAME, "id", this.getPackageName());
if (imageId != 0) {
ImageView imageView = (ImageView) findViewById(imageId);
imageView.setImageResource(R.drawable.img);
}
}
I think what you're looking for is something like this
fun changeImage(which: String) {
when(which) {
"a" -> imageView_A.setImageResource(R.drawable.img)
"b" -> imageView_B.setImageResource(R.drawable.img)
"c" -> imageView_C.setImageResource(R.drawable.img)
"d" -> imageView_D.setImageResource(R.drawable.img)
else -> throw IllegalArgumentException("Unknown image view")
}
}
int[] images = {R.id.imageA,R.id.imageB,R.id.imageC,R.id.imageD,R.id.imageE};
int[] drawables = {R.drawable.imageA,R.drawable.imageB,R.drawable.imageC,R.drawable.imageD,R.drawable.imageE};
for(int i=0;i<5;i++)
{
findViewById(images[i]).setImageResource(drawables[i]);
}
It's easier.
I have over 100 images in my drawable. Its basically a Category. I am calling data from server where a column included category. My images were named as cat_image1, cat_image2, cat_image3 etc. The server sending the corresponding srting as Image1, Image2, Image3 etc respectively. I think its not the way what I am doing
String catString = someJSONObject.getString(Config.POI_CATEGORY);
if (catString == "image1") {
someView.setImage(getResources().getDrawable(R.mipmap.image1));
}
else if (catString == "image2") {
someView.setImage(getResources().getDrawable(R.mipmap.image2));
}
else if (catString == "image3") {
someView.setImage(getResources().getDrawable(R.mipmap.image3));
}
...
...
...
Try something like this:
// catString = cat -> R.drawable.cat
int imageId = getResources().getIdentifier(catString, "drawable", getPackageName());
someView.setImage(imageId));
If you need a prefix use this:
// catString = cat -> R.drawable.ic_cat
int imageId = getResources().getIdentifier("ic_" + catString, "drawable", getPackageName());
someView.setImage(imageId));
You can also use a HashMap:
HashMap<String, Integer> hm = new HashMap<>();
// Put elements to the map
hm.put("cat", R.drawable.ic_some_cat_image);
hm.put("other cat", R.drawable.ic_other_cat);
for (int i = 0; i < typeofplace.length; i++) {
// You might want to check if it exists in the hasmap
someView.setImage(hm.get(catString));
}
I would like to change the imageview src based on my string, I have something like this:
ImageView imageView1 = (ImageView)findViewById(R.id.imageView1);
String correctAnswer = "poland";
String whatEver = R.drawable+correctAnswer;
imageView1.setImageResource(whatEver);
Of course it doesnt work. How can I change the image programmatically?
public static int getImageId(Context context, String imageName) {
return context.getResources().getIdentifier("drawable/" + imageName, null, context.getPackageName());
}
use:
imageView1.setImageResource(getImageId(this, correctAnswer);
Note: leave off the extension (eg, ".jpg").
Example: image is "abcd_36.jpg"
Context c = getApplicationContext();
int id = c.getResources().getIdentifier("drawable/"+"abcd_36", null, c.getPackageName());
((ImageView)v.findViewById(R.id.your_image_on_your_layout)).setImageResource(id);
I don't know if this is what you had in mind at all, but you could set up a HashMap of image id's (which are ints) and Strings of correct answers.
HashMap<String, Integer> images = new HashMap<String, Integer>();
images.put( "poland", Integer.valueOf( R.drawable.poland ) );
images.put( "germany", Integer.valueOf( R.drawable.germany ) );
String correctAnswer = "poland";
imageView1.setImageResource( images.get( correctAnswer ).intValue() );
Hi i am converting from kilo to stone-pounds, i want to place stones in one edittext and pounds in one edittext , below is my method
public ArrayList<HashMap<String, Integer>> kiloTostomepound(int s) {
int stone = (int) (s * 2.2);
int stonevalue = stone/14;
int spound = (stone % 14);
arrayList = new ArrayList<HashMap<String,Integer>>();
HashMap<String, Integer> h1 = new HashMap<String, Integer>();
h1.put(STONE,stonevalue);
h1.put(STONEPOUND, spound);
arrayList.add(h1);
return arrayList;
}
i want to get values from the arryalist and set it to edittext.
Doing a below but givinf nullpointerexception
edt2.setText(String.valueOf(kiloTostomepound(arrayList.get(0).get(STONE))));
edt3.setText(String.valueOf(kiloTostomepound(arrayList.get(1).get(STONEPOUND))));
The below code traverses through the list and prints key and value.
for (int a =0; a<myList.size();a++)
{
HashMap<String, Integer> tmpData = (HashMap<String, Integer>) myList.get(a);
Set<String> key = tmpData.keySet();
Iterator it = key.iterator();
while (it.hasNext()) {
String hmKey = (String)it.next();
Integer hmData = (Integer) tmpData.get(hmKey);
System.out.println("Key: "+hmKey +" & Data: "+hmData);
it.remove(); // avoids a ConcurrentModificationException
}
}
So if you need the first value try following.
HashMap<String, Integer> tmpData = (HashMap<String, Integer>) myList.get(0);
Set<String> key = tmpData.keySet();
Iterator it = key.iterator();
// Get the first element
String hmKey = (String)it.next();
Integer hmData = (Integer) tmpData.get(hmKey);
// Set the key and value to Edit text
edt2.setText(hmKey+" "+hmData);
Seems like your assigning the value to the arrayList variable inside of the method. Hence the
kiloTostomepound(arrayList.get(0).get(STONE))
Will throw a nullpointer for arrayList.
If I understand your code correctly, the below code should do the trick. But I don't know the input for the kiloTostomepound method.
edt2.setText(String.valueOf(kiloTostomepound("INPUT TO METHOD").get(0).get(STONE)));
edt3.setText(String.valueOf(kiloTostomepound("INPUT TO METHOD").get(1).get(STONEPOUND)));
This is because your method returns the arrayList with the hashmaps inside.
My button sends a parameter to the function.
<Button
android:id="#+id/tela1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Chinese Day"
android:onClick="loadPage"
android:tag="page1"
/>
My function should use this parameter to load the page1 activity.
public void loadPage(View view) {
String page = (String) view.getTag();
setContentView(R.layout.page);
}
How to make this work?
Tks
You want to specify in the button's tag the name of the layout, right?
Try the following:
String page = (String) view.getTag();
int layoutId= getResources().getIdentifier(page, "layout", getPackageName());
setContentView(layoutId);
Hope this helps.
You could use Java reflection API.
Each activity is an integer in R.layout. You only need to search for the attribute inside R.layout and then get its integer value to shove into setContentView.
try {
String tag = (String) btn.getTag(); // Button in variable "btn"
Class<R.layout> cls = R.layout.class;
Field field = cls.getDeclaredField(tag);
Integer obj = (Integer) field.get(null); // You could do these two in one line
int value = obj.intValue();
Log.i("Test", "Actvity id code = " + obj.toString()); // Testing code
setContentView(value);
}
catch (Exception e) {
e.printStackTrace();
return;
}