How to get the width and height of an android widget ImageView

Question

----------------------------------------------         ImageView     --------------                                                                                                    Actual image                                                                                  60px height of ImageView                                                                                                                                    --------------                         ----------------------------------------------      lt ------------------------------------------------ gt                     90px width of ImageView   I have an image view with some default height and width  images are stored in db and I want to scale Image according to Imageview height width  As I don t want it give default values because when ever I change it s height and width I also have to change it in code   I am trying to get the height and width of ImageView but 0 is returned to me in both cases   int height     ImageView  v findViewById R id img ItemView   getHeight      this returns me 0 even it has default height and width

User · Answer

I could get image width and height by its drawable   int width   imgView getDrawable   getIntrinsicWidth    int height   imgView getDrawable   getIntrinsicHeight

User · Answer

my friend by this u are not getting height of image stored in db but you are getting view height for getting height of image u have to create bitmap from db s image and than u can fetch height and width of imageview

User · Answer

My answer on this question might help you   int finalHeight  finalWidth  final ImageView iv    ImageView findViewById R id scaled image   final TextView tv    TextView findViewById R id size label   ViewTreeObserver vto   iv getViewTreeObserver    vto addOnPreDrawListener new ViewTreeObserver OnPreDrawListener         public boolean onPreDraw             iv getViewTreeObserver   removeOnPreDrawListener this           finalHeight   iv getMeasuredHeight            finalWidth   iv getMeasuredWidth            tv setText  Height      finalHeight     Width      finalWidth           return true              You can then add your image scaling work from within the onPreDraw   method

User · Answer

If you have created multiple images dynamically than try this one      initialize your images array  private ImageView myImages     new ImageView your array length        create programatically and add to parent view   for  int i   0  i  lt  your array length  i                      myImages i    new ImageView this                   myImages i  setId i   1                   myImages i  setBackgroundResource your array i                    RelativeLayout LayoutParams params   new RelativeLayout LayoutParams                          frontWidth i   frontHeight i                      MarginLayoutParams  params  setMargins frontX axis i                           frontY axis i   0  0                   myImages i  setAdjustViewBounds true                   myImages i  setLayoutParams params                    if  getIntent      null  amp  amp  i    your array length                        final int j   i                      myImages j  getViewTreeObserver   addOnPreDrawListener new ViewTreeObserver OnPreDrawListener                             public boolean onPreDraw                                 myImages j  getViewTreeObserver   removeOnPreDrawListener this                       finalHeight   myImages j  getMeasuredHeight                            finalWidth   myImages j  getMeasuredWidth                        your textview setText  Height      finalHeight     Width      finalWidth                               return true                                                                                      your parent layout addView myImages i   params                      That s it  Happy Coding

User · Answer

Post to the UI thread works for me   final ImageView iv    ImageView findViewById R id scaled image    iv post new Runnable                  Override             public void run                     int width   iv getMeasuredWidth                    int height   iv getMeasuredHeight

User · Answer

your xml file       lt ImageView android id    id imageView                 android layout width  wrap content                 android layout height  wrap content                 android src   drawable image                 android scaleType  fitXY                 android adjustViewBounds  true   gt    your java file   ImageView imageView    ImageView findViewById R id imageView        int width   imageView getDrawable   getIntrinsicWidth         int   height   imageView getDrawable   getIntrinsicHeight

User · Answer

I think you can let the Android OS take care of this for you   Set the scale type on the ImageView to fitXY and the image it displays will be sized to fit the current size of the view    lt ImageView      android layout width  90px       android layout height  60px      android scaleType  fitXY    gt

User · Answer

The reason the ImageView s dimentions are 0 is because when you are querying them  the view still haven t performed the layout and measure steps  You only told the view how it would  behave  in the layout  but it still didn t calculated where to put each view   How do you decide the size to give to the image view  Can t you simply use one of the scaling options natively implemented

User · Answer

The simplest way is to get the width and height of an ImageView in onWindowFocusChanged method of the activity     Override public void onWindowFocusChanged boolean hasFocus        super onWindowFocusChanged hasFocus        height   mImageView getHeight        width   mImageView getWidth

User · Answer

I just set this property and now Android OS is taking care of every thing      android adjustViewBounds  true    Use this in your layout xml where you have planted your ImageView  D

[android] How to get the width and height of an android.widget.ImageView?

Examples related to android

Examples related to image

Examples related to height

Examples related to width