LayoutParams params = new FrameLayout.LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
imageView
mainimage = new ImageView(HLActivity.this);
mainimage.setLayoutParams(params);
loader.DisplayImage(_pageslist.get(j).getUrl(), mainimage);
I already tried mainimage.getwidth() and mainimage.getHeight();
Now i want to findout the orignalwidth and height of the ImageView after
place the image in the imageview. can you please help me.
getWidth() and getHeight() are the indeed ones you are looking for, but you are trying to ask for the width and the height when the view is not measured yet. To fix this, we post a message to the ImageView, which will get executed after the measurement is done.
LayoutParams params = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
// mark it as final, so it can be accessed in the runnable.
final imageView mainimage = new ImageView(HLActivity.this);
mainimage.setLayoutParams(params);
mainimage.post(new Runnable() {
#Override
public void run() {
// get the width and the height
int width = mainimage.getWidth();
int height = mainimage.getHeight();
// do what you want to do with the sizes.
loader.DisplayImage(_pageslist.get(j).getUrl(), mainimage);
}
});
Related
So I am making an app that holds multiple user-chosen pictures. I have default ImageViews with pre-set heights of 300dp. I want this height to change to wrap_content once an image has been placed into the ImageView. The only way I know to do this is to remove the image from the layout and then re-add it with a new LayoutParams, but this messes up the order of the other views in my layout. Can I change the height without removing it?
Essentially:
LinearLayout mainLayout = (LinearLayout) findViewById(R.id.mainLayout);
final float scale = getResources().getDisplayMetrics().density;
LinearLayout.LayoutParams mTestImgParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
(int) Math.ceil(scale * 300)
);
final ImageView createdView = new ImageView(this);
mainLayout.addView(createdView, mTestImgParams);
//onLongClick listener, get picture, set the picture into the imageview, etc.
I somehow want to change the
(int) Math.ceil(scale*300)
to
LinearLayout.LayoutParams.WRAP_CONTENT
without removing and re-adding the ImageView, and only after the image has been placed. Help please.
You could try to get the current layout params and change it.
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) createdView.getLayoutParams();
params.height = LayoutParams.WRAP_CONTENT;
createdView.setLayoutParams(params);
Is the source of the slider and the lesson link:
http://www.oodlestechnologies.com/blogs/Facebook-Style-Slide-Menu-In-Android
In this case, the width of the file "left_menu.xml" determined TextView (android:layout_width="260dp")
How do I set the width to "LinearLayout" file "left_menu.xml" depending on the device screen? For example, I want the width of the "LinearLayout" was always 1/3 of the screen device? Or any way to set the width of the TextView 1/3 of the width of the device screen.
To set the LinearLayout or TextView width to 1/3 of the device screen:
first of all get the device screen width:
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
try {
display.getRealSize(size);
} catch (NoSuchMethodError err) {
display.getSize(size);
}
int width = size.x;
int height = size.y;
now just create a LayoutParams and set it to the Text:
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams((int)(width/3),
LinearLayout.LayoutParams.WRAP_CONTENT); // or set height to any fixed value you want
your_layout.setLayoutParams(lp);
// OR
your_textView.setLayoutParams(lp);
LinearLayout linear = (LinearLayout) findViewById(R.id.ll);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
linear.setLayoutParams(params);
As you can see, you can set Integer values for the LinearLayout.LayoutParams() constructor, like this:
LinearLayout.LayoutParams cellParams = new LinearLayout.LayoutParams(0, 100);
The costructor wants pixels and not dp(Density Pixels), here's a formula to convert PXs from DPs:
(int) (<numberOfDPs> * getContext().getResources().getDisplayMetrics().density + 0.5f)
LinearLayout layout = (LinearLayout)findViewById(R.id.ll);
LayoutParams params = (LayoutParams) layout.getLayoutParams();
params.height = 100;
params.width = 100;
The above answers are correct. I'll just suggest future readers to take a look at their xml layout file and be sure that the LinearLayout element is not using weight attribute. If so, consider updating weight in your LayoutParams object.
Another good practice is to retrieve the layout params object from the view you're trying to adjust, instead of creating one from scratch and having to set all the values.
LinearLayout YOUR_LinearLayout =(LinearLayout)findViewById(R.id.YOUR_LinearLayout)
LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
/*width*/ ViewGroup.LayoutParams.MATCH_PARENT,
/*height*/ 100,
/*weight*/ 1.0f
);
YOUR_LinearLayout.setLayoutParams(param);
The easy way to do that, set value of layoutParams, and please notice this size is not in DP.
view.layoutParams.width = 400;
view.layoutParams.height = 150;
view.requestLayout();
How can I set an GestureOverlayView's width and height programmatically?
I tried the below code. But I am getting null pointer exception in setting the width and height.
GestureOverlayView gestureOverlayView = new GestureOverlayView(this);
View inflate = getLayoutInflater().inflate(R.layout.main, null);
ImageView imageView = (ImageView) inflate.findViewById(R.id.imageView);
gestureOverlayView.addView(inflate);
gestureOverlayView.getLayoutParams().height = 50;
gestureOverlayView.getLayoutParams().width = 50;
setContentView(gestureOverlayView);
You need to add the view first before you can read out the height and width. Also then you meight get some trouble only after the second or third call of onMeasure(...) the dimensions are final.
If you want to set the width and height by code use this:
ViewGroup.LayoutParams lp = gestureOverlayView.getLayoutParams();
if(lp == null) {
// not yet added to parent
lp = new ViewGroup.LayoutParams(desiredWidth, desiredHeight);
} else {
lp.width = desiredWidth;
lp.height = desiredHeight;
}
gestureOverlayView.setLayoutParams(lp);
yourparent.addView(gestureOverlayView, lp);
Please note that you need to choose also the right LayoutParams implementation. Here I use that one of ViewGroup.
That's my source code to create a new ImageView:
ImageView image = new ImageView(this);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.width = screen_dimens(0.5, "w");
params.height = screen_dimens(0.5, "w");
image.setLayoutParams(params);
(screen_dimens(0.5, "w")=50% of screen width)
But now when I want to get the width of the Image, I get the following results:
image.getWidth() => 0
image.getLayoutParams().width => 360
Now what is the difference between those two functions? And how can I set the Image-width so the getWidth() method also returns the correct value?
Even you have set width and height for a ImageView or any View by using LayoutParams,
imageView.getWidth() always returns 0 until it is drawn in its parent.
Use this to set width and height :
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(100, 100);
iv.setLayoutParams(layoutParams);
u can use
image.post(new Runnable() {
public void run() {
image.getMeasuredHeight();
}
});
instead of
image.getWidth()
Hi I wanted to change height and width property of image view inside my activity
I tried it in following way but its not working for me ...
View card_view = getLayoutInflater().inflate(R.layout.card_details1,null);
coupon_img = (ImageView) card_view.findViewById(R.id.coupon_image);
// I tried this ////////
coupon_img.getLayoutParams().height = 20;
coupon_img.getLayoutParams().width = 20;
// I also tried this ////
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(100, 100);
coupon_img.setLayoutParams(layoutParams);
// also this one ////
coupon_img.setMaxHeight(10);
But I am not able to change height and width of imageview src. Is there any mistake I am doing?
How to do this?
Need help...
Thank you...
In this piece of code, I am creating a new instance of an ImageView at runtime and setting dimensions to it:
// SET THE IMAGEVIEW DIMENSIONS
int dimens = 120;
float density = activity.getResources().getDisplayMetrics().density;
int finalDimens = (int)(dimens * density);
LinearLayout.LayoutParams imgvwDimens =
new LinearLayout.LayoutParams(finalDimens, finalDimens);
imgAlbumPhoto.setLayoutParams(imgvwDimens);
// SET SCALETYPE
imgAlbumPhoto.setScaleType(ScaleType.CENTER_CROP);
// SET THE MARGIN
int dimensMargin = 5;
float densityMargin = activity.getResources().getDisplayMetrics().density;
int finalDimensMargin = (int)(dimensMargin * densityMargin);
LinearLayout.LayoutParams imgvwMargin =
new LinearLayout.LayoutParams(finalDimens, finalDimens);
imgvwMargin.setMargins
(finalDimensMargin, finalDimensMargin, finalDimensMargin, finalDimensMargin);
This will set the dimensions of the ImageView. They will, however, be in px. Use the code from here if you need dp values: https://stackoverflow.com/a/9563438/450534
UPDATED:
To change the dimensions of an existing ImageView that has already been defined in the XML, use this:
coupon_img.setLayoutParams(new LayoutParams(100, 100));
try some thing like this...
LayoutParams params = new LayoutParams(100, 100);
parantlayout.addView(coupon_img, params);
I think this will help you.
I think you are not adding the changed image to the layout..
LinearLayout ll = (LinearLayout)findViewById(R.layout.yourlinearlayout);
image.setLayoutParams(
new LinearLayout.LayoutParams(
bmp.getWidth(),
bmp.getHeight()));
ll.addView(image);// Then add the image to linear layout