I added a button and a point in my project and put the point and button in the relative layout and set them same params like this code:
rllp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
rllp.topMargin = 0 ;
rllp.leftMargin = 0 ;
rllp2 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
rllp2.topMargin = 0 ;
rllp2.leftMargin = 0 ;
drawingImageView = (ImageView) this.findViewById(R.id.DrawingImageView);
Bitmap bitmap = Bitmap.createBitmap((int) getWindowManager()
.getDefaultDisplay().getWidth(), (int) getWindowManager()
.getDefaultDisplay().getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawingImageView.setImageBitmap(bitmap);
Paint paint = new Paint();
paint.setStrokeWidth(6);
drawingImageView.setLayoutParams(rllp);
canvas.drawPoint(0, 0, paint);
btn = (Button) findViewById(R.id.button1);
btn.setLayoutParams(rllp2);
but result is not what I wanted!! the button and the point is not in the same position ... and I was going to put both of them in the (0,0).
I think problem is here:
Bitmap bitmap = Bitmap.createBitmap((int) getWindowManager()
.getDefaultDisplay().getWidth(), (int) getWindowManager()
.getDefaultDisplay().getHeight(), Bitmap.Config.ARGB_8888);
but I don't have any solution for this ... how can I set their position in one place??
it's the picture of result :
http://i.stack.imgur.com/IWx7V.png
I want to put the point at the top-left corner of the button.
I think bitmap width and height make this ploblem... can I draw a line without using bitmap??
Related
I am working on an android app and I want to take screenshot of a visible area of horizontalscrollview. I am using below code for that :-
public Bitmap screenShot(View view) {
/*Rect rect = new Rect(0, 0,
mDiviceWidth , view.getHeight());*/
/*Rect rect = new Rect(view.getScrollX(), 0,
view.getScrollX() + mDiviceWidth , view.getHeight());*/
Rect scrollBounds = new Rect();
// view.getHitRect(scrollBounds);
// view.getDrawingRect(scrollBounds);
// view.getLocalVisibleRect(scrollBounds);
// view.getGlobalVisibleRect(scrollBounds);
view.getWindowVisibleDisplayFrame(scrollBounds);
Log.e("X Scrolled", ""+view.getScrollX());
Log.e("left", ""+scrollBounds.left);
Log.e("right", ""+scrollBounds.right);
Log.e("top", ""+scrollBounds.top);
Log.e("bottom", ""+scrollBounds.bottom);
/*view.setDrawingCacheEnabled(true);
Bitmap bitmap = view.getDrawingCache();*/
Bitmap bitmap = Bitmap.createBitmap(view.getWidth(),
view.getHeight(), Config.ARGB_8888);
/*float left,right,top,bottom;
left = view.getLeft();
right = mDiviceWidth;
top = 0;
bottom = view.getHeight();*/
Canvas canvas = new Canvas(bitmap);
// canvas.clipRect(left, top,
// right , bottom);
canvas.clipRect(scrollBounds);
view.draw(canvas);
// view.setDrawingCacheEnabled(false);
return bitmap;
}
Above code is taking the screenshot but returning wrong area. Some times it captures visible area but sometimes it captures the random area which is not visible or partial visible. I have already used
// view.getHitRect(scrollBounds);
// view.getDrawingRect(scrollBounds);
// view.getLocalVisibleRect(scrollBounds);
// view.getGlobalVisibleRect(scrollBounds);
methods but not getting the perfect result.
So please help me to resolve this issue.
Use this function:
private static Bitmap takeScreenShot(Activity activity) {
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap b1 = view.getDrawingCache();
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
int width = activity.getWindowManager().getDefaultDisplay().getWidth();
int height = activity.getWindowManager().getDefaultDisplay().getHeight();
Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height - statusBarHeight);
view.destroyDrawingCache();
return b;
}
how can I display a programmatically created ImageView on top of a previously created View Canvas? I tried using bringToFront(), but without success.
Code:
RelativeLayout root = findViewById(R.id.layout);
ImageView img = new ImageView(GameGuessActivity.context);
img.setImageResource(R.drawable.image);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(width, height);
params.leftMargin = x;
params.topMargin = y;
root.addView(img, params);
img.bringToFront();
The Image is being displayed, but underneath the canvas, which I don't want.
You have to redraw your imageview on canvas:
pcanvas = new Canvas();
pcanvas.setBitmap(bitmap); // drawXY will result on that Bitmap
pcanvas.drawBitmap(bitmap, 0, 0, null);
mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC));
image.draw(pcanvas);
img.bringToFront();
img.invalidate();
img.draw(pcanvas);
I need to create a completely round image in Android. I've got the following code which works in newer version of Android, but in older versions (2.3), it is just a black circle:
Bitmap avatar = null;
if (avatarUrl == null || avatarUrl.equals("")) {
avatar = BitmapFactory.decodeResource(context.getResources(), R.drawable.icon_no_avatar);
} else {
avatar = HttpClientHelper.downloadImage(avatarUrl);
}
if (avatar == null) {
// No avatar? Load the default one and use it instead
avatar = BitmapFactory.decodeResource(context.getResources(), R.drawable.icon_no_avatar);
}
float width = 50; // avatar.getWidth();
float height = 50; // avatar.getHeight();
float ratio = (float)avatar.getWidth() / (float)avatar.getHeight();
// Scale the avatar to the area that it needs to fit into
avatar = Bitmap.createScaledBitmap(avatar, (int)(width * ratio), (int)height, true);
// Turn the avatar into a round image
Bitmap circleBitmap = Bitmap.createBitmap((int)width, (int)height, Bitmap.Config.ARGB_8888);
BitmapShader shader = new BitmapShader(avatar, TileMode.CLAMP, TileMode.CLAMP);
Paint paint = new Paint();
paint.setShader(shader);
RectF rect = new RectF(0.0f, 0.0f, width, height);
Canvas c = new Canvas(circleBitmap);
c.drawCircle(width / 2, height / 2, (width / 2) - 1, paint);
Is there something different I should do with 2.3 to make this work?
Use this
float width = 50; // avatar.getWidth();
float height = 50; // avatar.getHeight();
float radius = 45;
Bitmap bmpBG = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bmpBG);
//YOU CAN ADD SHADER FOR EFFECTS
Paint p = new Paint();
p.setAntiAlias(true);
p.setDither(true);
p.setColor(Color.RED);//SET YOUR COLOR HERE
c.drawCircle(width/ 2, height/ 2,
radius , p);
//NOW USE bmpBG
This must be a bug in 2.3. I was previously setting the round bitmap as the ImageView background which caused the black circle. When I set it as the foreground, the problem went away.
Again, this only happens with 2.3. After 3.0 this problem no longer exists.
I have searched for many answers here for drawing a circle on bitmap using canvas. However, I got some error in the code and the application stopped without any exception.
Can anyone give me some help? It works fine with I create a blank bitmap and draw a circle on it.
Any help will be appreciated!
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.main);
Paint paint = new Paint();
//paint.setAntiAlias(true);
paint.setColor(Color.BLUE);
Canvas canvas = new Canvas(bmp);
canvas.drawCircle(50, 50, 10, paint);
ImageView imageView = (ImageView)findViewById(R.id.imageView1);
//imageView.setAdjustViewBounds(true);
imageView.setImageBitmap(bmp);
Read somewhere that Resource bitmaps are immutable. Try...
bmp = bmp.copy(bmp.getConfig(), true);
This will draw a circle for you for given height
private RectF outerCircle;
diameter =400;
int left = (width - diameter) / 2;
int top = (height - diameter) / 2;
int bottom = top + diameter;
int right = left + diameter;
outerCircle = new RectF(left, top, right, bottom);
In my application I used canvas to draw the text. now I want to set the width of the draw text. I can set only x , y position. I can't set width and height.
My problem
update
for example "India is my Country" or if any length text it goes outside of canvas that is outside of the background image.
i want to print "India is
my country" if i set width mean i think it goes to next line
#Override
protected void onDraw(Canvas canvas1)
{
Paint paint = new Paint();
Bitmap myBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.ban_background);
Bitmap resizeImage1=Bitmap.createScaledBitmap(myBitmap,590,350,false);
canvas1.drawColor(Color.BLACK);
canvas1.drawBitmap(resizeImage1,10,5, null);
paint.setStyle(Paint.Style.FILL);
paint.setAntiAlias(true);
paint.setTextSize(25);
paint.setColor(Color.BLUE);
paint.setFakeBoldText(true);
paint.setTextSize(20);
paint.setStyle(Paint.Style.FILL_AND_STROKE);
canvas1.drawText(CameraText, 100,175, paint);
}
}
i have used to create a bitmap as follows and iam able to set the width and height
Bitmap finalImage = Bitmap.createBitmap(IMAGE_WIDTH, IMAGE_HEIGHT,
Bitmap.Config.RGB_565);
Bitmap tempImage = Bitmap.createBitmap(IMAGE_WIDTH / 2, IMAGE_HEIGHT,
Bitmap.Config.RGB_565);
Canvas g = new Canvas(finalImage);
Canvas gtemp = new Canvas(tempImage);
g.drawColor(Color.WHITE);
gtemp.drawColor(Color.WHITE);
Paint pnt = new Paint();
pnt.setColor(Color.BLACK);
pnt.setTextAlign(Paint.Align.CENTER);
pnt.setTextSize(40);
pnt.setTypeface(font1);
g.drawText(input, IMAGE_WIDTH / 2, 40, pnt);
Rect grct = new Rect(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT);
Rect grctTemp = new Rect(0, 0, IMAGE_WIDTH / 2, IMAGE_HEIGHT);
gtemp.drawBitmap(finalImage, grct, grctTemp, pnt);
`
i am not sure what you mean but you can try the setStrokeWidth(2.0f)
i hope this helps :D