android - How to set image in ImageView to right proportions -

look @ picture below.
i'm loading image sdcard code belove.

i cannot picture automatically fill imageview. set background color green highlight problem. have tried many android:scaletype center , fit_xy but.

im using insamplesize = 8 how can imageview automatically scale image in right hight/width proportions , fill screen

also thing, see exittext , button placed above imageview(i think). want them under , not block imageview. maybe misunderstand android layout technical.

drawview.java

public class drawview extends imageview {  private context ctx; public drawview(context context, attributeset atts) {     super(context, atts);     this.ctx = context; }  @override  protected void ondraw(canvas canvas) {     string filepath = environment.getexternalstoragedirectory().tostring() + "/ptppservice/163693fe-7c48-4568-a082-00047123b9f1.2.imag2200.jpg";     bitmapfactory.options options = new bitmapfactory.options();     options.insamplesize = 8;      bitmap bitmap = bitmapfactory.decodefile(filepath,options);           rect rect = new rect(0, 0, bitmap.getwidth(), bitmap.getheight());     canvas.drawbitmap(bitmap, null, rect,null); } 

}

main1.xml

<?xml version="1.0" encoding="utf-8"?><relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent">  <com.hasse.move.drawview      android:id="@+id/mainview"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:layout_alignparenttop="true"     android:background="#00ff00"     android:adjustviewbounds="true"   />    <relativelayout      android:id="@+id/innerrelativelayout"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparentbottom="true" >    <edittext      android:id="@+id/edittextaddtext"     android:layout_width="fill_parent"     android:layout_toleftof="@+id/btnsave"     android:layout_height="wrap_content"     android:text="wrap"    />    <button      android:id="@+id/btnsave"      android:layout_alignparentright="true"      android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="save"    />    </relativelayout>  </relativelayout> 

main activity

public class main extends activity {      drawview theimage;     /** called when activity first created. */     @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         requestwindowfeature(window.feature_no_title);         // draw view         setcontentview(r.layout.main1);          theimage = (drawview) findviewbyid(r.id.mainview);         //do stuff     }     @override     public void onconfigurationchanged(configuration newconfig)     {     //  toast.maketext(this, "onconfigurationchanged",toast.length_long).show();         super.onconfigurationchanged(newconfig);     } } 

here using destination rectangle size of loaded bitmap instead of full size of canvas: rect rect = new rect(0, 0, bitmap.getwidth(), bitmap.getheight());

you need find out size of canvas. can use onsizechanged:

@override public void onsizechanged (int w, int h, int oldw, int oldh){   super.onsizechanged(w, h, oldw, oldh);    screenw = w;   screenh = h; }