[android-developers] Re: adding custom view in main.xml
my code:-
main.xml
?xml version=1.0 encoding=utf-8?
com.MyPack.canvasexample.Myview
android:id=@+id/view1
android:layout_width=fill_parent
xmlns:android=http://schemas.android.com/apk/res/android;
android:layout_height=fill_parent
android:clickable=true
/
Myview.java
package com.MyPack.canvasexample;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
public class Myview extends View {
public Myview(Context context) {
super(context);
// TODO Auto-generated constructor stub
this.invalidate();
}
public Myview(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
this.invalidate();
}
public Myview(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
this.invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
canvas.drawLine(100, 100, 200, 200, new Paint());
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
// TODO Auto-generated method stub
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
canvasexample.java
package com.MyPack.canvasexample;
import android.app.Activity;
import android.os.Bundle;
public class canvasexample extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
View v= findViewById(R.id.view1);
if(v==null)
Log.w(isnull, null);
else
Log.w(isnull, not null);
}
}
this is my code
the log displays not null for isnull tag that is view to b not
null...
do we need to write anything in manifest file.
in graphical view of main.xml i can see a line drawn on the canvas but
when i execute my program it shows nothing on canvas...
ya we knw that we can draw a line without creating an extra view but
we r trying to do it by creating a custom view...
On Mar 18, 9:55 pm, Aisthesis marsh...@marshallfarrier.com wrote:
did you use the fully qualified name when you put it in main.xml?
e.g.: com.google.myapp.MyView
if that doesn't do it, it's hard to debug without any code--also there
are ways to draw a line without creating an extra custom view
On Mar 17, 8:05 am, Vishwesh R. vish...@gmail.com wrote:
hi,
im a beginner
i have created a Myview wich extends View class. i have drawn a
line on this view (that is Myview) in its onDraw() method.
i included my view in its main.xml
it shows no error but when i run this application, it loads the canvas
but im unable to see the line wich i have drawn in Myview
the coordinate of the line do lie on canvas but it not visible after
the application is run..
--
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[android-developers] Re: adding custom view in main.xml
set paint style
canvas.drawLine(100, 100, 200, 200, new Paint());
instead of new paint define pay style
On Mar 22, 11:27 am, Vishwesh R. vish...@gmail.com wrote:
my code:-
main.xml
?xml version=1.0 encoding=utf-8?
com.MyPack.canvasexample.Myview
android:id=@+id/view1
android:layout_width=fill_parent
xmlns:android=http://schemas.android.com/apk/res/android;
android:layout_height=fill_parent
android:clickable=true
/
Myview.java
package com.MyPack.canvasexample;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
public class Myview extends View {
public Myview(Context context) {
super(context);
// TODO Auto-generated constructor stub
this.invalidate();
}
public Myview(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
this.invalidate();
}
public Myview(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
this.invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
canvas.drawLine(100, 100, 200, 200, new Paint());
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
// TODO Auto-generated method stub
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
canvasexample.java
package com.MyPack.canvasexample;
import android.app.Activity;
import android.os.Bundle;
public class canvasexample extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
View v= findViewById(R.id.view1);
if(v==null)
Log.w(isnull, null);
else
Log.w(isnull, not null);
}
}
this is my code
the log displays not null for isnull tag that is view to b not
null...
do we need to write anything in manifest file.
in graphical view of main.xml i can see a line drawn on the canvas but
when i execute my program it shows nothing on canvas...
ya we knw that we can draw a line without creating an extra view but
we r trying to do it by creating a custom view...
On Mar 18, 9:55 pm, Aisthesis marsh...@marshallfarrier.com wrote: did you
use the fully qualified name when you put it in main.xml?
e.g.: com.google.myapp.MyView
if that doesn't do it, it's hard to debug without any code--also there
are ways to draw a line without creating an extra custom view
On Mar 17, 8:05 am, Vishwesh R. vish...@gmail.com wrote:
hi,
im a beginner
i have created a Myview wich extends View class. i have drawn a
line on this view (that is Myview) in its onDraw() method.
i included my view in its main.xml
it shows no error but when i run this application, it loads the canvas
but im unable to see the line wich i have drawn in Myview
the coordinate of the line do lie on canvas but it not visible after
the application is run..
--
You received this message because you are subscribed to the Google
Groups Android Developers group.
To post to this group, send email to android-developers@googlegroups.com
To unsubscribe from this group, send email to
android-developers+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: adding custom view in main.xml
did you use the fully qualified name when you put it in main.xml? e.g.: com.google.myapp.MyView if that doesn't do it, it's hard to debug without any code--also there are ways to draw a line without creating an extra custom view On Mar 17, 8:05 am, Vishwesh R. vish...@gmail.com wrote: hi, im a beginner i have created a Myview wich extends View class. i have drawn a line on this view (that is Myview) in its onDraw() method. i included my view in its main.xml it shows no error but when i run this application, it loads the canvas but im unable to see the line wich i have drawn in Myview the coordinate of the line do lie on canvas but it not visible after the application is run.. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
