[android-beginners] Re: Please help in getting screen coordinates of a view
Hi Kavitha,
I see that your frame1 has the parameter wrap_content... If on the start
nothing is in this view then the view will be 0 wide (hence the getLeft and
getRight returning 0).
Later on I see that you're adding content to frame1, I don't think android
automatically adjusts it's view size to the children.
You can review the View documentation on that -->
http://developer.android.com/reference/android/view/View.html#requestLayout().
The documentation of the requestLayout() function is the following: "Call
this when something has changed which has invalidated the layout of this
view. This will schedule a layout pass of the view tree.".
I think you need to call the requestLayout() function if you add any
children to the View, however i'm not sure about that, i can't do any
testing atm because i'm at work.
With kind regards,
Jark
2009/3/24 kavitha
>
> Hi Jark,
>
> I changed from onStart() to onResume(),But still it prints as o for
> everything.
>
> Is there any other way to get screen coordinates,,any suggestions please.
>
> Thanks
> Kavitha
>
> On Tue, Mar 24, 2009 at 12:07 PM, Jark Reijerink
> wrote:
> > Hi Kavitha,
> >
> > If i look at the the Activity lifecycle -->
> > http://developer.android.com/reference/android/app/Activity.html
> >
> > I see that when the onStart() method is called the activity is becoming
> > visible, can you try changing onStart() into onResume()?
> >
> > With kind regards,
> >
> > Jark
> >
> > 2009/3/24 kavitha
> >>
> >> Hi Jark,
> >>
> >> I tried to print the view coordinates,they print value as 0.
> >>
> >> If i say v.getLeft() even that print it's value as 0.
> >>
> >> I am not understanding.Please help on this regard.It displays frame
> >> and images correctly in position.
> >>
> >> Here is my code.I am trying to print view values in onStart()
> >>
> >>
> >> package com.android.table;
> >>
> >> import android.app.Activity;
> >> import android.graphics.Bitmap;
> >> import android.graphics.BitmapFactory;
> >> import android.os.Bundle;
> >> import android.view.Display;
> >> import android.view.View;
> >> import android.view.ViewGroup;
> >> import android.view.WindowManager;
> >> import android.widget.FrameLayout;
> >> import android.widget.RelativeLayout;
> >> import android.graphics.Rect;
> >>
> >> public class GameDemo extends Activity {
> >> public static int idLayout = 1;
> >> public static int screenheight = 0;
> >> public static int screenwidth = 0;
> >> public AddPegHoles adp = new AddPegHoles(this);
> >> public Hole h;
> >> public static int holeid = 0;
> >>
> >> Hole[] holeArray = new Hole[3];
> >>
> >> - Show quoted text -
> >> FrameLayout l1,l2,l3,l4,;
> >> RelativeLayout layout;
> >> /** Called when the activity is first created. */
> >> @Override
> >> public void onCreate(Bundle savedInstanceState) {
> >> super.onCreate(savedInstanceState);
> >> setContentView(R.layout.main);
> >> layout=(RelativeLayout) findViewById(R.id.tableviewback);
> >> layout.setBackgroundResource(R.drawable.woodenbackground);
> >>
> >> Display display;
> >> display =
> >> ((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
> >> screenheight = display.getHeight();
> >> screenwidth = display.getWidth();
> >>
> >> l1=(FrameLayout)findViewById(R.id.frame1);
> >> adp.addPegHoles(l1, 1,0);
> >> createHole(holeid,true,R.id.frame1,1);
> >> l2=(FrameLayout)findViewById(R.id.frame2);
> >> adp.addPegHoles(l2, 1, leftpadding+l1.getWidth());
> >> holeid++; createHole(holeid,true,R.id.frame2,1);
> >> l3=(FrameLayout)findViewById(R.id.frame3);
> >> adp.addPegHoles(l3, 1, leftpadding+l1.getWidth());
> >> holeid++; createHole(holeid,true,R.id.frame3,1);
> >>
> >>
> >> int leftpadding=(screenwidth/7);
> >> int toppadding=(screenheight/7);
> >>
> >>
> >> ViewGroup child=(ViewGroup)layout.getChildAt(0);//frame1
> >>child.setPadding(45*2, 45, 0, 0);
> >>child=(ViewGroup)layout.getChildAt(1); // frame2
> >>child.setPadding(45*3, 45, 0, 0);
> >>child=(ViewGroup)layout.getChildAt(2); //frame3
> >> child.setPadding(45*4, 45, 0, 0);
> >>
> >> }
> >>
> >> public void onStart(){
> >> super.onStart();
> >>
> >> int[] loc=new int[2];
> >>
> >>View v = layout.getChildAt(1);
> >>v.getLocationOnScreen(loc);
> >> System.out.println(loc[0]+loc[1]);
> >> System.out.println(v.getLeft());
> >> System.out.println(v.getRight());
> >>
> >>
> >>
> >> v=(FrameLayout)findViewById(R.id.frame1);
> >>
> >>v.getLocationOnScreen(loc);
> >> System.out.println(loc[0]+loc[1]);
> >> System.out.println(v.getLeft());
> >> System.out.println(v.getRight());
> >>
> >>}
> >>
> >> public void createHole(int holeid, boolean filled,
> >>
[android-beginners] Re: Please help in getting screen coordinates of a view
Hi Jark,
I changed from onStart() to onResume(),But still it prints as o for everything.
Is there any other way to get screen coordinates,,any suggestions please.
Thanks
Kavitha
On Tue, Mar 24, 2009 at 12:07 PM, Jark Reijerink
wrote:
> Hi Kavitha,
>
> If i look at the the Activity lifecycle -->
> http://developer.android.com/reference/android/app/Activity.html
>
> I see that when the onStart() method is called the activity is becoming
> visible, can you try changing onStart() into onResume()?
>
> With kind regards,
>
> Jark
>
> 2009/3/24 kavitha
>>
>> Hi Jark,
>>
>> I tried to print the view coordinates,they print value as 0.
>>
>> If i say v.getLeft() even that print it's value as 0.
>>
>> I am not understanding.Please help on this regard.It displays frame
>> and images correctly in position.
>>
>> Here is my code.I am trying to print view values in onStart()
>>
>>
>> package com.android.table;
>>
>> import android.app.Activity;
>> import android.graphics.Bitmap;
>> import android.graphics.BitmapFactory;
>> import android.os.Bundle;
>> import android.view.Display;
>> import android.view.View;
>> import android.view.ViewGroup;
>> import android.view.WindowManager;
>> import android.widget.FrameLayout;
>> import android.widget.RelativeLayout;
>> import android.graphics.Rect;
>>
>> public class GameDemo extends Activity {
>> public static int idLayout = 1;
>> public static int screenheight = 0;
>> public static int screenwidth = 0;
>> public AddPegHoles adp = new AddPegHoles(this);
>> public Hole h;
>> public static int holeid = 0;
>>
>> Hole[] holeArray = new Hole[3];
>>
>> - Show quoted text -
>> FrameLayout l1,l2,l3,l4,;
>> RelativeLayout layout;
>> /** Called when the activity is first created. */
>> �...@override
>> public void onCreate(Bundle savedInstanceState) {
>> super.onCreate(savedInstanceState);
>> setContentView(R.layout.main);
>> layout=(RelativeLayout) findViewById(R.id.tableviewback);
>> layout.setBackgroundResource(R.drawable.woodenbackground);
>>
>> Display display;
>> display =
>> ((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
>> screenheight = display.getHeight();
>> screenwidth = display.getWidth();
>>
>> l1=(FrameLayout)findViewById(R.id.frame1);
>> adp.addPegHoles(l1, 1,0);
>> createHole(holeid,true,R.id.frame1,1);
>> l2=(FrameLayout)findViewById(R.id.frame2);
>> adp.addPegHoles(l2, 1, leftpadding+l1.getWidth());
>> holeid++; createHole(holeid,true,R.id.frame2,1);
>> l3=(FrameLayout)findViewById(R.id.frame3);
>> adp.addPegHoles(l3, 1, leftpadding+l1.getWidth());
>> holeid++; createHole(holeid,true,R.id.frame3,1);
>>
>>
>> int leftpadding=(screenwidth/7);
>> int toppadding=(screenheight/7);
>>
>>
>> ViewGroup child=(ViewGroup)layout.getChildAt(0);//frame1
>> child.setPadding(45*2, 45, 0, 0);
>> child=(ViewGroup)layout.getChildAt(1); // frame2
>> child.setPadding(45*3, 45, 0, 0);
>> child=(ViewGroup)layout.getChildAt(2); //frame3
>> child.setPadding(45*4, 45, 0, 0);
>>
>> }
>>
>> public void onStart(){
>> super.onStart();
>>
>> int[] loc=new int[2];
>>
>> View v = layout.getChildAt(1);
>> v.getLocationOnScreen(loc);
>> System.out.println(loc[0]+loc[1]);
>> System.out.println(v.getLeft());
>> System.out.println(v.getRight());
>>
>>
>>
>> v=(FrameLayout)findViewById(R.id.frame1);
>>
>> v.getLocationOnScreen(loc);
>> System.out.println(loc[0]+loc[1]);
>> System.out.println(v.getLeft());
>> System.out.println(v.getRight());
>>
>> }
>>
>> public void createHole(int holeid, boolean filled,
>> int parent_frame_id,
>> int parentrow) {
>> h = new Hole(holeid);
>> h.setHoleId(R.drawable.hole);
>> h.setHoleIndex(0);
>> h.setFilled(filled);
>> h.setParentFrameId(parent_frame_id);
>> h.setParentRow(parentrow);
>> h.setMarbleId(R.drawable.marble);
>> h.setMarbleIndex(1);
>> holeArray[holeid] = h;
>>
>> }
>> }
>>
>> And I am adding imageviews for frame in AddPegHoles.java looks like this
>>
>> package com.android.table;
>>
>> import android.content.Context;
>> import android.view.ViewGroup;
>> import android.widget.FrameLayout;
>> import android.widget.ImageView;
>>
>> public class AddPegHoles {
>>
>> public Context context;
>> public static int id=0;
>>
>> AddPegHoles(Context c){
>> super();
>> this.context=c;
>>
>> }
>>
>> public void addPegHoles(ViewGroup v,int row,int leftpadding){
>>
>> ImageView iv1=new ImageView(context);
>> iv1.setImageResource(R.drawable.hole);
>>
[android-beginners] Re: Please help in getting screen coordinates of a view
Hi Kavitha,
If i look at the the Activity lifecycle -->
http://developer.android.com/reference/android/app/Activity.html
I see that when the onStart() method is called the activity is becoming
visible, can you try changing onStart() into onResume()?
With kind regards,
Jark
2009/3/24 kavitha
>
> Hi Jark,
>
> I tried to print the view coordinates,they print value as 0.
>
> If i say v.getLeft() even that print it's value as 0.
>
> I am not understanding.Please help on this regard.It displays frame
> and images correctly in position.
>
> Here is my code.I am trying to print view values in onStart()
>
>
> package com.android.table;
>
> import android.app.Activity;
> import android.graphics.Bitmap;
> import android.graphics.BitmapFactory;
> import android.os.Bundle;
> import android.view.Display;
> import android.view.View;
> import android.view.ViewGroup;
> import android.view.WindowManager;
> import android.widget.FrameLayout;
> import android.widget.RelativeLayout;
> import android.graphics.Rect;
>
> public class GameDemo extends Activity {
> public static int idLayout = 1;
> public static int screenheight = 0;
> public static int screenwidth = 0;
> public AddPegHoles adp = new AddPegHoles(this);
> public Hole h;
> public static int holeid = 0;
>
> Hole[] holeArray = new Hole[3];
>
> - Show quoted text -
> FrameLayout l1,l2,l3,l4,;
> RelativeLayout layout;
> /** Called when the activity is first created. */
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.main);
> layout=(RelativeLayout) findViewById(R.id.tableviewback);
> layout.setBackgroundResource(R.drawable.woodenbackground);
>
> Display display;
> display =
> ((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
> screenheight = display.getHeight();
> screenwidth = display.getWidth();
>
> l1=(FrameLayout)findViewById(R.id.frame1);
> adp.addPegHoles(l1, 1,0);
> createHole(holeid,true,R.id.frame1,1);
> l2=(FrameLayout)findViewById(R.id.frame2);
> adp.addPegHoles(l2, 1, leftpadding+l1.getWidth());
> holeid++; createHole(holeid,true,R.id.frame2,1);
> l3=(FrameLayout)findViewById(R.id.frame3);
> adp.addPegHoles(l3, 1, leftpadding+l1.getWidth());
> holeid++; createHole(holeid,true,R.id.frame3,1);
>
>
> int leftpadding=(screenwidth/7);
> int toppadding=(screenheight/7);
>
>
> ViewGroup child=(ViewGroup)layout.getChildAt(0);//frame1
>child.setPadding(45*2, 45, 0, 0);
>child=(ViewGroup)layout.getChildAt(1); // frame2
>child.setPadding(45*3, 45, 0, 0);
>child=(ViewGroup)layout.getChildAt(2); //frame3
> child.setPadding(45*4, 45, 0, 0);
>
> }
>
> public void onStart(){
> super.onStart();
>
>int[] loc=new int[2];
>
> View v = layout.getChildAt(1);
> v.getLocationOnScreen(loc);
> System.out.println(loc[0]+loc[1]);
> System.out.println(v.getLeft());
> System.out.println(v.getRight());
>
>
>
> v=(FrameLayout)findViewById(R.id.frame1);
>
> v.getLocationOnScreen(loc);
> System.out.println(loc[0]+loc[1]);
> System.out.println(v.getLeft());
> System.out.println(v.getRight());
>
>}
>
> public void createHole(int holeid, boolean filled,
> int parent_frame_id,
> int parentrow) {
> h = new Hole(holeid);
> h.setHoleId(R.drawable.hole);
> h.setHoleIndex(0);
> h.setFilled(filled);
> h.setParentFrameId(parent_frame_id);
> h.setParentRow(parentrow);
> h.setMarbleId(R.drawable.marble);
> h.setMarbleIndex(1);
> holeArray[holeid] = h;
>
> }
> }
>
> And I am adding imageviews for frame in AddPegHoles.java looks like this
>
> package com.android.table;
>
> import android.content.Context;
> import android.view.ViewGroup;
> import android.widget.FrameLayout;
> import android.widget.ImageView;
>
> public class AddPegHoles {
>
> public Context context;
> public static int id=0;
>
> AddPegHoles(Context c){
> super();
> this.context=c;
>
> }
>
> public void addPegHoles(ViewGroup v,int row,int leftpadding){
>
> ImageView iv1=new ImageView(context);
> iv1.setImageResource(R.drawable.hole);
> ImageView iv11=new ImageView(context);
> iv11.setImageResource(R.drawable.marble);
> id++; v.setId(id);
> v.addView(iv1,0);v.addView(iv11,1);
>
> }
>
> }
>
>
>
>
>
>
> And my AndroidManifest.xml looks like this
>
>
> xmlns:android="http://schemas.android.com/apk/res/android";
>
> android:layout_height="fill_parent"
> android:layo
[android-beginners] Re: Please help in getting screen coordinates of a view
Hi Jark,
I tried to print the view coordinates,they print value as 0.
If i say v.getLeft() even that print it's value as 0.
I am not understanding.Please help on this regard.It displays frame
and images correctly in position.
Here is my code.I am trying to print view values in onStart()
package com.android.table;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.Display;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.RelativeLayout;
import android.graphics.Rect;
public class GameDemo extends Activity {
public static int idLayout = 1;
public static int screenheight = 0;
public static int screenwidth = 0;
public AddPegHoles adp = new AddPegHoles(this);
public Hole h;
public static int holeid = 0;
Hole[] holeArray = new Hole[3];
- Show quoted text -
FrameLayout l1,l2,l3,l4,;
RelativeLayout layout;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
layout=(RelativeLayout) findViewById(R.id.tableviewback);
layout.setBackgroundResource(R.drawable.woodenbackground);
Display display;
display =
((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
screenheight = display.getHeight();
screenwidth = display.getWidth();
l1=(FrameLayout)findViewById(R.id.frame1);
adp.addPegHoles(l1, 1,0);
createHole(holeid,true,R.id.frame1,1);
l2=(FrameLayout)findViewById(R.id.frame2);
adp.addPegHoles(l2, 1, leftpadding+l1.getWidth());
holeid++; createHole(holeid,true,R.id.frame2,1);
l3=(FrameLayout)findViewById(R.id.frame3);
adp.addPegHoles(l3, 1, leftpadding+l1.getWidth());
holeid++; createHole(holeid,true,R.id.frame3,1);
int leftpadding=(screenwidth/7);
int toppadding=(screenheight/7);
ViewGroup child=(ViewGroup)layout.getChildAt(0);//frame1
child.setPadding(45*2, 45, 0, 0);
child=(ViewGroup)layout.getChildAt(1); // frame2
child.setPadding(45*3, 45, 0, 0);
child=(ViewGroup)layout.getChildAt(2); //frame3
child.setPadding(45*4, 45, 0, 0);
}
public void onStart(){
super.onStart();
int[] loc=new int[2];
View v = layout.getChildAt(1);
v.getLocationOnScreen(loc);
System.out.println(loc[0]+loc[1]);
System.out.println(v.getLeft());
System.out.println(v.getRight());
v=(FrameLayout)findViewById(R.id.frame1);
v.getLocationOnScreen(loc);
System.out.println(loc[0]+loc[1]);
System.out.println(v.getLeft());
System.out.println(v.getRight());
}
public void createHole(int holeid, boolean filled,
int parent_frame_id,
int parentrow) {
h = new Hole(holeid);
h.setHoleId(R.drawable.hole);
h.setHoleIndex(0);
h.setFilled(filled);
h.setParentFrameId(parent_frame_id);
h.setParentRow(parentrow);
h.setMarbleId(R.drawable.marble);
h.setMarbleIndex(1);
holeArray[holeid] = h;
}
}
And I am adding imageviews for frame in AddPegHoles.java looks like this
package com.android.table;
import android.content.Context;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ImageView;
public class AddPegHoles {
public Context context;
public static int id=0;
AddPegHoles(Context c){
super();
this.context=c;
}
public void addPegHoles(ViewGroup v,int row,int leftpadding){
ImageView iv1=new ImageView(context);
iv1.setImageResource(R.drawable.hole);
ImageView iv11=new ImageView(context);
iv11.setImageResource(R.drawable.marble);
id++; v.setId(id);
v.addView(iv1,0);v.addView(iv11,1);
}
}
And my AndroidManifest.xml looks like this
http://schemas.android.com/apk/res/android";
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:background="#44"
android:id="@+id/tableviewback"
>
Can anybody help on this
Thanks
Kavitha
On Mon, Mar 23, 2009 at 5:28 PM, Jark Reijerink
wrote:
> Hello,
>
> Are you sure you're getting a valid FrameLayout?
>
> Because if findViewById doesnt finds a valid view it returns null. Which
> could explain the NullPointerException.
>
> Also: are you setting your xml layout with setContentView in your onCreate
> method? If so try putting your code after that met
[android-beginners] Re: Please help in getting screen coordinates of a view
Hi Jark,
I tried to print the view coordinates,they print value as 0.
If i say v.getLeft() even that print it's value as 0.
I am not understanding.Please help on this regard.It displays frame
and images correctly in position.
Here is my code.I am trying to print view values in onStart()
package com.android.table;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.Display;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.RelativeLayout;
import android.graphics.Rect;
public class GameDemo extends Activity {
public static int idLayout = 1;
public static int screenheight = 0;
public static int screenwidth = 0;
public AddPegHoles adp = new AddPegHoles(this);
public Hole h;
public static int holeid = 0;
Hole[] holeArray = new Hole[3];
FrameLayout l1,l2,l3,l4,;
RelativeLayout layout;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
layout=(RelativeLayout) findViewById(R.id.tableviewback);
layout.setBackgroundResource(R.drawable.woodenbackground);
Display display;
display =
((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
screenheight = display.getHeight();
screenwidth = display.getWidth();
l1=(FrameLayout)findViewById(R.id.frame1);
adp.addPegHoles(l1, 1,0);
createHole(holeid,true,R.id.frame1,1);
l2=(FrameLayout)findViewById(R.id.frame2);
adp.addPegHoles(l2, 1, leftpadding+l1.getWidth());
holeid++; createHole(holeid,true,R.id.frame2,1);
l3=(FrameLayout)findViewById(R.id.frame3);
adp.addPegHoles(l3, 1, leftpadding+l1.getWidth());
holeid++; createHole(holeid,true,R.id.frame3,1);
int leftpadding=(screenwidth/7);
int toppadding=(screenheight/7);
ViewGroup child=(ViewGroup)layout.getChildAt(0);//frame1
child.setPadding(45*2, 45, 0, 0);
child=(ViewGroup)layout.getChildAt(1); // frame2
child.setPadding(45*3, 45, 0, 0);
child=(ViewGroup)layout.getChildAt(2); //frame3
child.setPadding(45*4, 45, 0, 0);
}
public void onStart(){
super.onStart();
int[] loc=new int[2];
View v = layout.getChildAt(1);
v.getLocationOnScreen(loc);
System.out.println(loc[0]+loc[1]);
System.out.println(v.getLeft());
System.out.println(v.getRight());
v=(FrameLayout)findViewById(R.id.frame1);
v.getLocationOnScreen(loc);
System.out.println(loc[0]+loc[1]);
System.out.println(v.getLeft());
System.out.println(v.getRight());
}
public void createHole(int holeid, boolean filled,
int parent_frame_id,
int parentrow) {
h = new Hole(holeid);
h.setHoleId(R.drawable.hole);
h.setHoleIndex(0);
h.setFilled(filled);
h.setParentFrameId(parent_frame_id);
h.setParentRow(parentrow);
h.setMarbleId(R.drawable.marble);
h.setMarbleIndex(1);
holeArray[holeid] = h;
}
}
And I am adding imageviews for frame in AddPegHoles.java looks like this
package com.android.table;
import android.content.Context;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ImageView;
public class AddPegHoles {
public Context context;
public static int id=0;
AddPegHoles(Context c){
super();
this.context=c;
}
public void addPegHoles(ViewGroup v,int row,int leftpadding){
ImageView iv1=new ImageView(context);
iv1.setImageResource(R.drawable.hole);
ImageView iv11=new ImageView(context);
iv11.setImageResource(R.drawable.marble);
id++; v.setId(id);
v.addView(iv1,0);v.addView(iv11,1);
}
}
And my AndroidManifest.xml looks like this
http://schemas.android.com/apk/res/android";
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:background="#44"
android:id="@+id/tableviewback"
>
Can anybody help on this
Thanks
Kavitha
On Mon, Mar 23, 2009 at 5:28 PM, Jark Reijerink
wrote:
> Hello,
>
> Are you sure you're getting a valid FrameLayout?
>
> Because if findViewById doesnt finds a valid view it returns null. Which
> could explain the NullPointe
[android-beginners] Re: Please help in getting screen coordinates of a view
Hi Jark,
Here is my code
package com.android.table;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.Display;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.RelativeLayout;
import android.graphics.Rect;
public class GameDemo extends Activity {
public static int idLayout = 1;
public static int screenheight = 0;
public static int screenwidth = 0;
public AddPegHoles adp = new AddPegHoles(this);
public Hole h;
public static int holeid = 0;
Hole[] holeArray = new Hole[33];
FrameLayout l1,l2,l3,l4,;
RelativeLayout layout;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
layout=(RelativeLayout) findViewById(R.id.tableviewback);
layout.setBackgroundResource(R.drawable.woodenbackground);
Display display;
display =
((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
screenheight = display.getHeight();
screenwidth = display.getWidth();
l1=(FrameLayout)findViewById(R.id.frame1);
adp.addPegHoles(l1, 1,0);
createHole(holeid,true,R.id.frame1,1);
l2=(FrameLayout)findViewById(R.id.frame2);
adp.addPegHoles(l2, 1, leftpadding+l1.getWidth());
holeid++; createHole(holeid,true,R.id.frame2,1);
l3=(FrameLayout)findViewById(R.id.frame3);
adp.addPegHoles(l3, 1, leftpadding+l1.getWidth());
holeid++; createHole(holeid,true,R.id.frame3,1);
int leftpadding=(screenwidth/7);
int toppadding=(screenheight/7);
On Mon, Mar 23, 2009 at 5:28 PM, Jark Reijerink
wrote:
> Hello,
>
> Are you sure you're getting a valid FrameLayout?
>
> Because if findViewById doesnt finds a valid view it returns null. Which
> could explain the NullPointerException.
>
> Also: are you setting your xml layout with setContentView in your onCreate
> method? If so try putting your code after that method call.
>
> Jark
>
> 2009/3/23 kavitha
>>
>> Hii All,
>>
>> I am developing a game in android and i want to capture screen
>> coordinates of a view(ImageView) which is embedded in frame.
>>
>> Hierarchy is
>> > android:layout_width="fill_parent" >
>> > android:layout_width="fill_parent" >
>> > android:layout_width="wrap_content"
>> android:id="@+id/frame14">
>>
>>
>>
>> At run time i am attaching two image views for frame layout.I wanted
>> to capture screen coordinates of frame layout.But Couldnt do it.if i
>> say
>>
>> (FrameLayout) f=(FrameLayout)findViewById(R.id.frame14);
>> int[] loc = new int[2];
>> f.getLocationOnScreen(loc);
>> System.out.println(loc[0]);
>> System.out.println(loc[1]);
>>
>> I get Null Pointer Exception for getLocationOnScreen() method.
>>
>> If I try to get f.getLeft() and f.getRight() they return as 0
>> coordinates.
>>
>> Can anyone please tell me how to find location on screen of a view.
>>
>> I tried even in onStart() method,,,still i get Null Pointer Exception.
>>
>> Please tell me how to get screen coordinates of a view in android.
>>
>> It is very urgent.Please help.
>>
>> Thanks
>> Kavitha
>>
>
>
> >
>
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[android-beginners] Re: Please help in getting screen coordinates of a view
Hello, Are you sure you're getting a valid FrameLayout? Because if findViewById doesnt finds a valid view it returns null. Which could explain the NullPointerException. Also: are you setting your xml layout with setContentView in your onCreate method? If so try putting your code after that method call. Jark 2009/3/23 kavitha > > Hii All, > > I am developing a game in android and i want to capture screen > coordinates of a view(ImageView) which is embedded in frame. > > Hierarchy is > android:layout_width="fill_parent" > > android:layout_width="fill_parent" > >android:layout_width="wrap_content" > android:id="@+id/frame14"> > > > > At run time i am attaching two image views for frame layout.I wanted > to capture screen coordinates of frame layout.But Couldnt do it.if i > say > > (FrameLayout) f=(FrameLayout)findViewById(R.id.frame14); > int[] loc = new int[2]; > f.getLocationOnScreen(loc); > System.out.println(loc[0]); > System.out.println(loc[1]); > > I get Null Pointer Exception for getLocationOnScreen() method. > > If I try to get f.getLeft() and f.getRight() they return as 0 > coordinates. > > Can anyone please tell me how to find location on screen of a view. > > I tried even in onStart() method,,,still i get Null Pointer Exception. > > Please tell me how to get screen coordinates of a view in android. > > It is very urgent.Please help. > > Thanks > Kavitha > > > --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. To post to this group, send email to android-beginners@googlegroups.com To unsubscribe from this group, send email to android-beginners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en -~--~~~~--~~--~--~---
