[android-developers] Re: drawing lines on top of a image view
You need to override the ImageView constructor with attributeSet.
Define public CustomDrawableView (Context context, AttributeSet
attrs) as well..
Your layout file looks for this constructor.
Neeraj
On Jul 16, 7:55 am, Jags jag...@gmail.com wrote:
my custom view looks as below
___
package com.mypackage;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.RectShape;
import android.widget.ImageView;
public class CustomDrawableView extends ImageView {
// private ShapeDrawable mDrawable;
public int imageid = 0;
ShapeDrawable bgDrawable = null;
ListShapeDrawable ls = new ArrayListShapeDrawable();
final int COUNT_SUMMERY = 3;
final int VERTICAL_OFFSET = 200;
final int HORIZENTAL_OFFSET = 20;
final int HORIZENTAL_GAP = 85;
final int VERTICAL_Y_POINT = 15;
final int VERTICAL_MAX_HEIGHT = 195;
final int HORIZENTAL_WIDTH = 60;
final int percentage[] = {25, 40, 35};
public CustomDrawableView(Context context, int id) {
super(context);
imageid = id;
switch(id) {
case R.drawable.summarychart:
for(int i = 0; i COUNT_SUMMERY; i++) {
int x = HORIZENTAL_OFFSET + (HORIZENTAL_GAP *
i);
int width = HORIZENTAL_WIDTH;
int height = VERTICAL_MAX_HEIGHT *
percentage[i] / 100;
int y = VERTICAL_OFFSET + VERTICAL_Y_POINT +
VERTICAL_MAX_HEIGHT -
height;
ShapeDrawable objDrawable = new
ShapeDrawable(new RectShape());
int color = 0;
switch(i) {
case 0:
color = Color.RED;
break;
case 1:
color = Color.GREEN;
break;
case 2:
color = Color.YELLOW;
break;
}
objDrawable.getPaint().setColor(color);
objDrawable.setBounds(x, y, x + width, y +
height);
ls.add(objDrawable);
}
break;
default:
break;
}
int x = 0;
int y = 0;
int width = 320;
int height = 480;
bgDrawable = new ShapeDrawable(new RectShape());
bgDrawable.getPaint().setColor(0x);
bgDrawable.setBounds(x, y, x + width, y + height);
}
protected void onDraw(Canvas canvas) {
/* // Draw the white background
// bgDrawable.draw(canvas);
// Draw the bitmaps
Bitmap bmp = BitmapFactory.decodeResource(getResources(),
imageid);
canvas.drawBitmap(bmp, 0, VERTICAL_OFFSET, null);
*/ // Draw bars
super.onDraw(canvas);
for(int i = 0; i COUNT_SUMMERY; i++) {
ShapeDrawable objDrawable = ls.get(i);
objDrawable.draw(canvas);
}
}
}
now i do in layout
com.mypackage.CustomDrawableView
android:layout_width=wrap_content
android:layout_height=wrap_content
android:src=@drawable/mychart /
but in layout i see a message
NoSuchMethodException:com.mypackage.CustomDrawableView.init(Android.conte
xt.Context,
Android.util.AttributeSet)
and while i run it crashes. if i uncomment the drawable way, then it
works, but other layouts are not displayed.
any help is appreciated
thanksin advance
jags
___
On Jul 13, 9:45 pm, Matty busbus...@gmail.com wrote:
If you want to draw on top of an ImageView, I would extend it and
override it's onDraw method. This provides you a [relative] canvas to
draw on. Just be sure to call super.onDraw() if you want the image to
show up also.
On Jul 13, 11:23 am,Jagsjag...@gmail.com wrote:
I am trying to put a background image and draw on top of that screen.
I assumed activity will have a on draw method, but it does not have.
it seems i need to use surfaceview. Can I put a surfaceview on top of
the image view and make it transparent ? any example/tutorial i can
[android-developers] Re: drawing lines on top of a image view
my custom view looks as below
___
package com.mypackage;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.RectShape;
import android.widget.ImageView;
public class CustomDrawableView extends ImageView {
// private ShapeDrawable mDrawable;
public int imageid = 0;
ShapeDrawable bgDrawable = null;
ListShapeDrawable ls = new ArrayListShapeDrawable();
final int COUNT_SUMMERY = 3;
final int VERTICAL_OFFSET = 200;
final int HORIZENTAL_OFFSET = 20;
final int HORIZENTAL_GAP = 85;
final int VERTICAL_Y_POINT = 15;
final int VERTICAL_MAX_HEIGHT = 195;
final int HORIZENTAL_WIDTH = 60;
final int percentage[] = {25, 40, 35};
public CustomDrawableView(Context context, int id) {
super(context);
imageid = id;
switch(id) {
case R.drawable.summarychart:
for(int i = 0; i COUNT_SUMMERY; i++) {
int x = HORIZENTAL_OFFSET + (HORIZENTAL_GAP *
i);
int width = HORIZENTAL_WIDTH;
int height = VERTICAL_MAX_HEIGHT *
percentage[i] / 100;
int y = VERTICAL_OFFSET + VERTICAL_Y_POINT +
VERTICAL_MAX_HEIGHT -
height;
ShapeDrawable objDrawable = new
ShapeDrawable(new RectShape());
int color = 0;
switch(i) {
case 0:
color = Color.RED;
break;
case 1:
color = Color.GREEN;
break;
case 2:
color = Color.YELLOW;
break;
}
objDrawable.getPaint().setColor(color);
objDrawable.setBounds(x, y, x + width, y +
height);
ls.add(objDrawable);
}
break;
default:
break;
}
int x = 0;
int y = 0;
int width = 320;
int height = 480;
bgDrawable = new ShapeDrawable(new RectShape());
bgDrawable.getPaint().setColor(0x);
bgDrawable.setBounds(x, y, x + width, y + height);
}
protected void onDraw(Canvas canvas) {
/* // Draw the white background
// bgDrawable.draw(canvas);
// Draw the bitmaps
Bitmap bmp = BitmapFactory.decodeResource(getResources(),
imageid);
canvas.drawBitmap(bmp, 0, VERTICAL_OFFSET, null);
*/// Draw bars
super.onDraw(canvas);
for(int i = 0; i COUNT_SUMMERY; i++) {
ShapeDrawable objDrawable = ls.get(i);
objDrawable.draw(canvas);
}
}
}
now i do in layout
com.mypackage.CustomDrawableView
android:layout_width=wrap_content
android:layout_height=wrap_content
android:src=@drawable/mychart /
but in layout i see a message
NoSuchMethodException:com.mypackage.CustomDrawableView.init(Android.context.Context,
Android.util.AttributeSet)
and while i run it crashes. if i uncomment the drawable way, then it
works, but other layouts are not displayed.
any help is appreciated
thanksin advance
jags
___
On Jul 13, 9:45 pm, Matty busbus...@gmail.com wrote:
If you want to draw on top of an ImageView, I would extend it and
override it's onDraw method. This provides you a [relative] canvas to
draw on. Just be sure to call super.onDraw() if you want the image to
show up also.
On Jul 13, 11:23 am,Jagsjag...@gmail.com wrote:
I am trying to put a background image and draw on top of that screen.
I assumed activity will have a on draw method, but it does not have.
it seems i need to use surfaceview. Can I put a surfaceview on top of
the image view and make it transparent ? any example/tutorial i can
refer to ?- Hide quoted text -
- Show quoted text -
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[android-developers] Re: drawing lines on top of a image view
If you want to draw on top of an ImageView, I would extend it and override it's onDraw method. This provides you a [relative] canvas to draw on. Just be sure to call super.onDraw() if you want the image to show up also. On Jul 13, 11:23 am, Jags jag...@gmail.com wrote: I am trying to put a background image and draw on top of that screen. I assumed activity will have a on draw method, but it does not have. it seems i need to use surfaceview. Can I put a surfaceview on top of the image view and make it transparent ? any example/tutorial i can refer to ? -- 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
