Scale an image ,keeping aspect ratio without being cropped-android app -

i take photo gallery , display on activity in image view . it's fine except when photo displayed. want photo displayed in exact same size image view keeping aspect ratio , not cropped. tried in xml(centercrop,fitxy...)this i'm trying,but not working.

showphotoactivity.class:

       imageview showphoto = (imageview) findviewbyid(r.id.image);        bundle extras = getintent().getextras();        uri uri = uri.parse(extras.getstring("imagepath"));      if (showphoto != null) {         showphoto.setadjustviewbounds(true);         showphoto.setimageuri(uri);     } 

file.xml

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"  tools:context="com.example.ga.photoeditor.showphotoactivity" android:background="#93212121">   <com.example.ga.photoeditor.scaleimageview     android:id="@+id/image"     android:layout_width="match_parent"     android:layout_height="320dp"     android:layout_centervertical="true"     android:layout_alignparentleft="true"     android:layout_alignparentstart="true" /> 

scaleimageview.java

public scaleimageview(context context, attributeset attrs, int defstyle) {     super(context, attrs, defstyle); }  public scaleimageview(context context, attributeset attrs) {     super(context, attrs); }  public scaleimageview(context context) {     super(context); }   @override protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {     // call super() resolveuri() called.     super.onmeasure(widthmeasurespec, heightmeasurespec);      // if there's no drawable can use result super.     if (getdrawable() == null)         return;      final int widthspecmode = measurespec.getmode(widthmeasurespec);     final int heightspecmode = measurespec.getmode(heightmeasurespec);      int w = getdrawable().getintrinsicwidth();     int h = getdrawable().getintrinsicheight();     if (w <= 0)         w = 1;     if (h <= 0)         h = 1;      // desired aspect ratio of view's contents (not including padding)     float desiredaspect = (float) w / (float) h;      // allowed change view's width     boolean resizewidth = widthspecmode != measurespec.exactly;      // allowed change view's height     boolean resizeheight = heightspecmode != measurespec.exactly;      int pleft = getpaddingleft();     int pright = getpaddingright();     int ptop = getpaddingtop();     int pbottom = getpaddingbottom();      // sizes imageview decided on.     int widthsize = getmeasuredwidth();     int heightsize = getmeasuredheight();      if (resizewidth && !resizeheight)     {         // resize width height, maintaining aspect ratio.         int newwidth = (int) (desiredaspect * (heightsize - ptop - pbottom)) + pleft + pright;         setmeasureddimension(newwidth, heightsize);     }     else if (resizeheight && !resizewidth)     {         int newheight = (int) ((widthsize - pleft - pright) / desiredaspect) + ptop + pbottom;         setmeasureddimension(widthsize, newheight);     } } } 

are aware of available attribute, "scaletype?"

<com.example.ga.photoeditor.scaleimageview android:id="@+id/image" android:layout_width="match_parent" android:layout_height="320dp" android:layout_centervertical="true" android:layout_alignparentleft="true" android:layout_alignparentstart="true" /> 

experiment inserting:

android:scaletype= [center, centercrop, centerinside, fitcenter, fitend, fitstart, fitxy, or matrix] 

it seems you're possibly trying change dimensions of imageview itself... different, apologize if i'm missing mark.