[android-beginners] translate just one circle not whole canvas

[Graham]

Hi Group,

I am getting used to android animations, and have come across an
issue. To keep it easy to explain, I have simplified my code. here I
am creating two circles, a red one and a green one. I now want to use
a translation animation on just the green circle circle when I click
the screen. I have all this working except when i click the screen
both circles move. How can I apply a translation animation to just one
circle (e.g. in my code mDrawable[0])?

Thanks

Graham



package com.image;

import android.app.Activity;
import android.os.Bundle;

public class image extends Activity {
/** Called when the activity is first created. */

private MoveCircleByTouch mMoveCircleByTouch;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

//last argument 1 = green, all others = red
mMoveCircleByTouch = new MoveCircleByTouch(this);

setContentView(mMoveCircleByTouch);

}
}



package com.image;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.view.animation.TranslateAnimation;


public class MoveCircleByTouch extends View{

private ShapeDrawable[] mDrawable;
private Animation anim;
private Animation translate;

public MoveCircleByTouch(Context context) {
super(context);

int x = 20;
int y = 20;
int width = 50;
int height = 50;

mDrawable = new ShapeDrawable[2];

//green circle
mDrawable[0] = new ShapeDrawable(new OvalShape());
mDrawable[0].getPaint().setColor(0xff74AC23);
mDrawable[0].setBounds(x, y, x + width, y + height);

/red circle
mDrawable[1] = new ShapeDrawable(new OvalShape());
mDrawable[1].getPaint().setColor(0x);
mDrawable[1].setBounds(x+50, y+50, x + width+50, y + height
+50);

}

public void onDraw(Canvas canvas){
super.onDraw(canvas);

if (translate == null) {
createTranslate(mDrawable[0]);
}


for (Drawable dr : mDrawable) {

   dr.draw(canvas);

}
}



@Override
public boolean onTouchEvent(MotionEvent event) {

switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
ScreenTouched();
invalidate();
break;
}

return true;

}


public void ScreenTouched(){
startAnimation(translate);
}



 private void createTranslate(ShapeDrawable mDrawable){
 translate = new TranslateAnimation(1, 100, 1, 100);
 translate.setRepeatCount(1);
 translate.setDuration(2000);

 }
}
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[android-beginners] Re: onTouch()

[Graham]

Thanks. Exactly the answer i was looking for.

On Aug 4, 4:43 pm, Balwinder Kaur (T-Mobile) balwinder.k...@t-
mobile.com wrote:
 You need to override the onTouchEvent method in CustomDrawableView
 @Override
         public boolean onTouchEvent(MotionEvent event) {
                 switch (event.getAction()) {

                   // get your x and y values from event.getX() and
 event.getY()

                 case MotionEvent.ACTION_DOWN:

                         // redraw your green or red circle depending on your 
 x,y
 values.
                         break;

                 }

                 return true;
         }

 Hope this helps,
 Balwinder Kaur
 Open Source Development Center
 ·T· · ·Mobile· stick together

 The views, opinions and statements in this email are those of the
 author solely in their individual capacity, and do not necessarily
 represent those of T-Mobile USA, Inc.

 On Aug 4, 5:10 am, Graham gxt...@gmail.com wrote:



  Hi again,

  I am getting to grip with the android fundamentals and am curious as
  to how the onTouch and the onTouchlisteners work.

  To keep it simple I have used onDraw to draw two circles on a canvas,
  a green circle and a red circle (each of type ShapeDrawable - Oval
  Shape). I now wish to make it so that when I push the green circle, it
  will move to the right and if I push the red circle it will move down.

  I can move the circles with a timer delay so I am aware of how to do
  this but I can't capture the onTouch. Can someone please help?

  I have drawn my two circles with the below code (very similar to one
  of the exercises):

  

  package com.image;

  import android.app.Activity;
  import android.os.Bundle;

  public class image extends Activity {
      /** Called when the activity is first created. */

          private CustomDrawableView mCustomDrawableView;
          //private CustomDrawableView mCustomDrawableView2;

          protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);

              //last argument 1 = green, all others = red
              mCustomDrawableView = new CustomDrawableView(this, 20,20,20,20);

              setContentView(mCustomDrawableView);

          }

  }

  package com.image;

  import android.content.Context;
  import android.graphics.Canvas;
  import android.graphics.drawable.Drawable;
  import android.graphics.drawable.ShapeDrawable;
  import android.graphics.drawable.shapes.OvalShape;
  import android.view.View;

  public class CustomDrawableView extends View {
      private ShapeDrawable[] mDrawables;

      public CustomDrawableView(Context context, int x, int y, int
  width, int height) {
          super(context);

          mDrawables = new ShapeDrawable[2];

          mDrawables[0] = new ShapeDrawable(new OvalShape()); // green
  one
          mDrawables[1] = new ShapeDrawable(new OvalShape()); //red one

          mDrawables[0].getPaint().setColor(0xff74AC23);
          mDrawables[1].getPaint().setColor(0x);

          mDrawables[0].setBounds(x,y,x+width,y+height); //arguments
  left, top, right, bottom
          mDrawables[1].setBounds(x+30,y+30,x+width+30,y+height+30);

      }

      @Override protected void onDraw(Canvas canvas) {

          //mDrawables[0].draw(canvas);
          for (Drawable dr : mDrawables) {
              dr.draw(canvas);
          }
      }

  }- Hide quoted text -

 - Show quoted text -
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[android-beginners] Re: Adding objects to a canvas

[Graham]

:) Thank you. I created an array of objects to fix the issue so have
an array of circles the onDraw method is using.

On Aug 3, 7:13 pm, Yusuf T. Mobile yusuf.s...@t-mobile.com wrote:
 The onDraw() function is the phone's way of asking you so how do you
 want me to draw this canvas, from scratch? If you say draw a circle
 there!, you get one circle. If you want it to draw two circles, your
 CustomDrawableView needs to tell it to draw two different circles
 every time onDraw() is called, for example with two different
 drawables.

 Yusuf Saib
 Android
 ·T· · ·Mobile· stick together
 The views, opinions and statements in this email are those of the
 author solely in their individual capacity, and do not necessarily
 represent those of T-Mobile USA, Inc.

 On Aug 3, 6:30 am, Graham gxt...@gmail.com wrote:



  Hi,

  I am new to the android developing world and have what I think is a
  very simple question. I have created a circle on a canvas and drawn it
  successfully. I now wish to add another circle to this already
  existing canvas in a different position. I have defined my x and y as
  arguments I pass to custom drawable view but when I try and get
  another circle drawn it just replaces the one that was already
  present. How do I keep the first circle and add on a second?

  (My code below does not show trying to add another circle, it is
  simply what works with creating a single colour circle).

  Thanks

  G

  package com.image;

  import android.app.Activity;
  import android.os.Bundle;

  public class image extends Activity {
      /** Called when the activity is first created. */

          private CustomDrawableView mCustomDrawableView;
          //private CustomDrawableView mCustomDrawableView2;

          protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);

              //last argument 1 = green, all others = red
              mCustomDrawableView = new CustomDrawableView(this, 150, 40,
  green);
              setContentView(mCustomDrawableView);
          }

  }

  package com.image;

  import android.content.Context;
  import android.graphics.Canvas;
  import android.graphics.drawable.ShapeDrawable;
  import android.graphics.drawable.shapes.OvalShape;
  import android.view.View;

  public class CustomDrawableView extends View {
      private ShapeDrawable mDrawable;

      public CustomDrawableView(Context context, int x, int y, String
  Colour) {
          super(context);

          //int x = 80;
          //int y = 90;
          int width = 50;
          int height = 50;

          mDrawable = new ShapeDrawable(new OvalShape());
          if (Colour == green){
          mDrawable.getPaint().setColor(0xff74AC23);//green
          } else if (Colour == red) {
          mDrawable.getPaint().setColor(0x);//red
          }
          mDrawable.setBounds(x, y, x + width, y + height);
      }

      protected void onDraw(Canvas canvas) {
          mDrawable.draw(canvas);
      }

  }- Hide quoted text -

 - Show quoted text -
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[android-beginners] onTouch()

[Graham]

Hi again,

I am getting to grip with the android fundamentals and am curious as
to how the onTouch and the onTouchlisteners work.

To keep it simple I have used onDraw to draw two circles on a canvas,
a green circle and a red circle (each of type ShapeDrawable - Oval
Shape). I now wish to make it so that when I push the green circle, it
will move to the right and if I push the red circle it will move down.

I can move the circles with a timer delay so I am aware of how to do
this but I can't capture the onTouch. Can someone please help?

I have drawn my two circles with the below code (very similar to one
of the exercises):




package com.image;

import android.app.Activity;
import android.os.Bundle;

public class image extends Activity {
/** Called when the activity is first created. */

private CustomDrawableView mCustomDrawableView;
//private CustomDrawableView mCustomDrawableView2;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

//last argument 1 = green, all others = red
mCustomDrawableView = new CustomDrawableView(this, 20,20,20,20);

setContentView(mCustomDrawableView);

}
}


package com.image;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.view.View;



public class CustomDrawableView extends View {
private ShapeDrawable[] mDrawables;

public CustomDrawableView(Context context, int x, int y, int
width, int height) {
super(context);


mDrawables = new ShapeDrawable[2];

mDrawables[0] = new ShapeDrawable(new OvalShape()); // green
one
mDrawables[1] = new ShapeDrawable(new OvalShape()); //red one

mDrawables[0].getPaint().setColor(0xff74AC23);
mDrawables[1].getPaint().setColor(0x);

mDrawables[0].setBounds(x,y,x+width,y+height); //arguments
left, top, right, bottom
mDrawables[1].setBounds(x+30,y+30,x+width+30,y+height+30);


}

@Override protected void onDraw(Canvas canvas) {

//mDrawables[0].draw(canvas);
for (Drawable dr : mDrawables) {
dr.draw(canvas);
}
}
}
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[android-beginners] Adding objects to a canvas

[Graham]

Hi,

I am new to the android developing world and have what I think is a
very simple question. I have created a circle on a canvas and drawn it
successfully. I now wish to add another circle to this already
existing canvas in a different position. I have defined my x and y as
arguments I pass to custom drawable view but when I try and get
another circle drawn it just replaces the one that was already
present. How do I keep the first circle and add on a second?

(My code below does not show trying to add another circle, it is
simply what works with creating a single colour circle).

Thanks

G




package com.image;

import android.app.Activity;
import android.os.Bundle;

public class image extends Activity {
/** Called when the activity is first created. */

private CustomDrawableView mCustomDrawableView;
//private CustomDrawableView mCustomDrawableView2;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

//last argument 1 = green, all others = red
mCustomDrawableView = new CustomDrawableView(this, 150, 40,
green);
setContentView(mCustomDrawableView);
}
}

package com.image;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.view.View;



public class CustomDrawableView extends View {
private ShapeDrawable mDrawable;

public CustomDrawableView(Context context, int x, int y, String
Colour) {
super(context);

//int x = 80;
//int y = 90;
int width = 50;
int height = 50;

mDrawable = new ShapeDrawable(new OvalShape());
if (Colour == green){
mDrawable.getPaint().setColor(0xff74AC23);//green
} else if (Colour == red) {
mDrawable.getPaint().setColor(0x);//red
}
mDrawable.setBounds(x, y, x + width, y + height);
}

protected void onDraw(Canvas canvas) {
mDrawable.draw(canvas);
}


}


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[android-beginners] Traceview: trace file not found

[Graham Morehead]

In an attempt to debug my app, I was trying to use 'traceview' (one of
the apps in the the android SDK).  In the windows edition of the SDK
version 1.0, the executable is 'traceview.bat'.  I was able to get a
tracefile by using the 'android.os.Debug' package and using
Debug.startMethodTracing(basename); and Debug.stopMethodTracing();
in my code.  I created a virtual sdcard for the emulator to use, and
then I ran the app on the emulator and was successful in creating a
trace file, which I pulled to a directory.  Here was my problem:
Whenever I tried to view the trace using 'traceview.bat', it said that
the file is not found.  This was hard to understand since I specified
the right directory.  I even went into that directory.  It still
couldn't find it.  I finally resolved it when I specified the whole
path using the notation  C:/topdir/nextdir/... etc.  If you're not
familiar with Cygwin (a Unix shell for windows), you also have the
choice of specifying a path with /cygdrive/c/topdir/..., but
'traceview' won't parse that.

Hope this helps someone.  It stalled me for hours.

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