How to get image height and width before rendering it onto screen.

//The java code 

package Volga.Myproject;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ViewFlipper;

public class Myproject extends Activity {
	ViewFlipper viewFlipper;
	Button child0,child1;
	ImageView imgChild0,imgChild1;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        viewFlipper=(ViewFlipper)findViewById(R.id.MainViewFlipper);
        child0=(Button)findViewById(R.id.btnChild0);
        child1=(Button)findViewById(R.id.btnChild1);
        imgChild0=(ImageView)findViewById(R.id.imgChild0);
        imgChild1=(ImageView)findViewById(R.id.imgChild1);
        
        System.out.println("Child 0 image Height"+imgChild0.getHeight()+" Width"+imgChild0.getWidth());
        System.out.println("Child 1 image Height"+imgChild1.getHeight()+" Width"+imgChild1.getWidth());
        System.out.println("************At FIRST THE H:W IS ZERO**********************");
        
        child0.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				viewFlipper.setDisplayedChild(0);
				System.out.println("Child 0 image Height"+imgChild0.getHeight()+" Width"+imgChild0.getWidth());
				if(imgChild0.getHeight()==0)
					System.out.println("************At FIRST THE H:W IS ZERO**********************");
				else
					System.out.println("***********Image Is previously loaded at this movment so that not zero************");
			}
		});
        
		child1.setOnClickListener(new OnClickListener() {
					
					@Override
					public void onClick(View arg0) {
						viewFlipper.setDisplayedChild(1);
						System.out.println("Child 1 image Height"+imgChild1.getHeight()+" Width"+imgChild1.getWidth());
						if(imgChild1.getHeight()==0)
							System.out.println("************At FIRST THE H:W IS ZERO**********************");
						else
							System.out.println("***********Image Is previously loaded at this movment so that not zero************");
					}
				});
    }
}




//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    >  
			<Button  
			    android:layout_width="wrap_content" 
			    android:layout_height="wrap_content" 
			    android:text="Child0"
			    android:id="@+id/btnChild0"
			    />
			 <Button  
			    android:layout_width="wrap_content" 
			    android:layout_height="wrap_content" 
			    android:text="Child1"
			    android:id="@+id/btnChild1"
			    />  
    
  </LinearLayout>  
   <ViewFlipper
						  android:orientation="vertical"
						  android:layout_width="fill_parent"
						  android:layout_height="fill_parent"
						  android:id="@+id/MainViewFlipper"
						  >
  
							    <LinearLayout android:orientation="vertical"
							  				android:layout_width="fill_parent"
							  				android:layout_height="fill_parent"
							  				android:id="@+id/child1">
											<ImageView  
											    android:layout_width="wrap_content" 
											    android:layout_height="wrap_content" 
											    android:src="@drawable/android"
											    android:id="@+id/imgChild0"
											    />
								</LinearLayout>	 <!-- child 0 default child --> 
								
								<LinearLayout android:orientation="vertical"
							  				android:layout_width="fill_parent"
							  				android:layout_height="fill_parent"
							  				android:id="@+id/child2">
							  				<ImageView  
											    android:layout_width="wrap_content" 
											    android:layout_height="wrap_content" 
											     android:src="@drawable/android_p"
											    android:id="@+id/imgChild1"/>
								</LinearLayout> <!-- child 1 child --> 
	
				</ViewFlipper>	 
    
</LinearLayout>

Select allOpen in new window