My application draws a circle when the screen is pressed. I'm trying to put text on the circles according to how many there are the screen. So if your first tap will give you a circle with the text C0, the second will give you a circle for C1, etc.
Currently my code looks like
lPaint = new Paint();
lPaint.setColor(Color.WHITE);
lPaint.setTextAlign(Paint.Align.CENTER);
lPaint.setTextSize(40);
nCanvas.drawCircle(v.x, v.y, 55, cPaint);
nCanvas.drawText("C"+i, v.x, v.y, lPaint);
Where v.x and v.y are the coordinators where you've touched the screen, and i is the circle counter. This code starts off just fine, but after the first circle draw, it changes ALL the text for ALL the circles to the new i value. How do I get around this?
Thanks
Just create a new variable i, inside custom view. Then increment variable i inside on click and in onDraw method just draw circle, or whatever you want.For example:
package yourpackage.
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Build;
import android.support.v4.content.ContextCompat;
import android.util.AttributeSet;
import android.view.View;
/**
* Color view used for picking color for drawing
*/
public class ColorView extends View {
private Paint drawPaint;
private int color = ContextCompat.getColor(getContext(), android.R.color.black);
private int i;
public ColorView(Context context) {
this(context, null);
}
public ColorView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ColorView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public ColorView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init();
}
private void init() {
drawPaint = new Paint();
drawPaint.setAntiAlias(true);
drawPaint.setColor(color);
drawPaint.setStyle(Paint.Style.FILL);
drawPaint.setStrokeJoin(Paint.Join.ROUND);
drawPaint.setStrokeCap(Paint.Cap.ROUND);
}
#Override
protected void onDraw(Canvas canvas) {
canvas.drawRect(0, 0, 100, 200, drawPaint);
}
public void setColor(int color) {
drawPaint.setColor(color);
this.color = color;
}
public void onClick() {
i++;
}
public int getColor() {
return color;
}
}
Related
I'm trying to make a custom imageview which cuts the image like below.
I checked many solutions but the nearest answer I saw is this link. But its slanting to opposite side and that too from corner. How can I cut the image with other side slanting and starting a little below.
// Custom View
public class SlantView extends View {
private Context mContext;
Paint paint ;
Path path;
public SlantView(Context ctx, AttributeSet attrs) {
super(ctx, attrs);
mContext = ctx;
setWillNotDraw(false);
paint = new Paint(Paint.ANTI_ALIAS_FLAG);
}
#Override
protected void onDraw(Canvas canvas) {
int w = getWidth(), h = getHeight();
paint.setStrokeWidth(2);
paint.setColor(Color.WHITE);
paint.setStyle(Paint.Style.FILL_AND_STROKE);
paint.setAntiAlias(true);
path = new Path();
path.setFillType(Path.FillType.EVEN_ODD);
path.moveTo(0,0);
path.lineTo(0,h);
path.lineTo(w,h);
path.close();
canvas.drawPath(path, paint);
}
}
Here i extended the RelativeLayout. (create a java file named cutLayout)
package com.blin.sharedelementtransition;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Xfermode;
import android.os.Build;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.widget.FrameLayout;
import android.widget.RelativeLayout;
/**
* Created by wituser on 12/12/16.
*/
public class cutLayout extends RelativeLayout {
private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
private Xfermode pdMode = new PorterDuffXfermode(PorterDuff.Mode.CLEAR);
private Path path = new Path();
public cutLayout(Context context) {
super(context);
}
public cutLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public cutLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public cutLayout(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
#Override
protected void dispatchDraw(Canvas canvas) {
int saveCount = canvas.saveLayer(0, 0, getWidth(), getHeight(), null, Canvas.ALL_SAVE_FLAG);
super.dispatchDraw(canvas);
paint.setXfermode(pdMode);
path.reset();
// path.moveTo(0, getHeight() - TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, getResources().getDisplayMetrics()));
path.moveTo(0, getHeight());
path.lineTo(getWidth(), getHeight());
path.lineTo(getWidth(), getHeight() - TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, getResources().getDisplayMetrics()));
// change value (50) to change the the slope.50 means 50dp.
// path.lineTo(getWidth()/2, getHeight());
// path.moveTo(0,0); // (0,0)
// path.lineTo(getPx(50),0); // (50,0)
// path.lineTo(0,getPx(50)); // (0,50)
//
// path.lineTo(0,getHeight()-getPx(50)); // (0,H-50)
// path.lineTo(getPx(50),getHeight()); // (50,H)
// path.lineTo(0,getHeight()); // (0,H)
//
// path.lineTo(0,0); // (0,0)
// path.lineTo(getWidth()-getPx(50),0); // (W-50,0)
// path.lineTo(getWidth(),getPx(50)); // (W,50)
// path.lineTo(getWidth(),0); // (W,0)
//
// path.lineTo(getWidth(),getHeight()-getPx(50)); // (W,H-50)
// path.lineTo(getWidth()-getPx(50),getHeight()); // (W-50,H)
// path.lineTo(getWidth(),getHeight()); // (W,H)
// path.lineTo(getWidth(),0); // (W,0)
path.close();
canvas.drawPath(path, paint);
canvas.restoreToCount(saveCount);
paint.setXfermode(null);
}
private float getPx(int i) {
return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, i, getResources().getDisplayMetrics());
}
}
and in xml, <your.package.name.cutLayout . cutLayout is the name of the javafile.
<com.blin.sharedelementtransition.cutLayout
android:layout_width="match_parent"
android:layout_height="300dp"
android:layout_margin="8dp">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/bg2"
android:layout_marginBottom="0.5dp"/>
</com.blin.sharedelementtransition.cutLayout>
I am creating a circle with custom view or canvas. The circle gets created with border as well but the problem is that the right and bottom part of circle gets truncated. I get the following output with below mentioned code,
My custom view class for creating the above mentioned class is as follows,
package cl.tk.ui.iBAPView;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.v4.content.ContextCompat;
import android.util.AttributeSet;
import android.view.View;
import cl.tkp.R;
public class RoundedView extends View {
private Paint paint,mPaintBorder;
private int color;
float borderWidth;
private String text = null;
private boolean checked = false;
private Drawable drawable;
public RoundedView(Context context) {
super(context);
bootstrap(context, null,0,0);
}
public RoundedView(Context context, AttributeSet attrs) {
super(context, attrs);
bootstrap(context, attrs, 0,0);
}
public RoundedView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
bootstrap(context, attrs, defStyleAttr, 0);
}
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public RoundedView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
bootstrap(context, attrs, defStyleAttr, defStyleRes);
}
private void bootstrap(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundedView, defStyleAttr, defStyleRes);
text = a.getString(R.styleable.RoundedView_android_text);
color = a.getColor(R.styleable.RoundedView_bgColor, Color.GRAY);
drawable=a.getDrawable(R.styleable.RoundedView_drawableCenter);
checked=a.getBoolean(R.styleable.RoundedView_checked,false);
borderWidth= a.getDimension(R.styleable.RoundedView_rborderWidth,context.getResources().getDimension(R.dimen._minus2sdp));
paint = new Paint(Paint.DITHER_FLAG);
mPaintBorder = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaintBorder.setColor(a.getColor(R.styleable.RoundedView_borderColor,ContextCompat.getColor(context,android.R.color.transparent)));
a.recycle();
}
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
}
#Override
protected void onDraw(Canvas canvas) {
//if (getBackgroundColor(this) != 0) color = getBackgroundColor(this);
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
if(borderWidth>0)
{
float radius=(getWidth()-borderWidth-2)/2;
canvas.drawCircle(radius + borderWidth,radius + borderWidth,radius + borderWidth, mPaintBorder);
canvas.drawCircle(radius + borderWidth,radius + borderWidth,radius ,paint);
}else {
float radius=getWidth()/2;
canvas.drawCircle(radius, radius, radius, paint);
}
}
}
This is how i call it in my xml,
<cl.tk.ui.iBAPView.RoundedView
android:id="#+id/signup_user_rv1"
android:layout_marginRight="#dimen/_3sdp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_width="#dimen/_18sdp"
android:layout_height="#dimen/_18sdp"
app:rborderWidth="#dimen/_2sdp"
app:borderColor="#color/colorBlue"/>
I had successfully created an answer of my This question(left drawable alignment with text in andorid)
but the problem is that the canvas.drawText x co-ordinate is not working properly as the x co-ordinate is not affecting the position of text.
Here is the result with overlapped text on drawable,
I just wanted to remove the overlap and give the distance between the drawable and text on canvas.
Here is my code as follows,
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
android.widget.TextView;
import cl.tt.R;
public class CenterDrawableButton extends TextView{
private Drawable mDrawableCenter;
public CenterDrawableButton(Context context) {
super(context);
init(context, null);
}
public CenterDrawableButton(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public CenterDrawableButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public CenterDrawableButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs){
if(attrs!=null){
TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.CenterDrawableButton, 0, 0);
try {
setCenterDrawable(a.getDrawable(R.styleable.CenterDrawableButton_drawableCenter));
} finally {
a.recycle();
}
}
}
public void setCenterDrawable(#Nullable Drawable center) {
int[] state;
state = getDrawableState();
if (center != null) {
center.setState(state);
center.setBounds(0, 0, center.getIntrinsicWidth(), center.getIntrinsicHeight());
center.setCallback(this);
}
mDrawableCenter = center;
invalidate();
requestLayout();
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (mDrawableCenter != null) {
setMeasuredDimension(Math.max(getMeasuredWidth(), mDrawableCenter.getIntrinsicWidth()),
Math.max(getMeasuredHeight(), mDrawableCenter.getIntrinsicHeight()));
}
}
#Override
protected void drawableStateChanged() {
super.drawableStateChanged();
if (mDrawableCenter != null) {
int[] state = getDrawableState();
mDrawableCenter.setState(state);
mDrawableCenter.setBounds(0, 0, mDrawableCenter.getIntrinsicWidth(),
mDrawableCenter.getIntrinsicHeight());
}
invalidate();
}
#Override
protected void onDraw(#NonNull Canvas canvas) {
super.onDraw(canvas);
if (mDrawableCenter != null) {
float textWidth = getPaint().measureText((String)getText());
int newPosition=getWidth()-((int)textWidth+getPaddingLeft() + getPaddingRight()+mDrawableCenter.getIntrinsicWidth()+ (int)getResources().getDimension(R.dimen._5sdp));
if(newPosition>0) {
canvas.translate(newPosition, (getHeight() - mDrawableCenter.getIntrinsicHeight()) / 2);
mDrawableCenter.draw(canvas);
canvas.save();
Paint textPaint = new Paint();
int yPos = (int) ((getHeight() - ((textPaint.descent() + textPaint.ascent())) / 2));
canvas.drawText(getText().toString(), newPosition, yPos, textPaint);
canvas.restore();
}else
{
int gnewPosition=getPaddingLeft() + getPaddingRight()+(int)getResources().getDimension(R.dimen._5sdp);
canvas.translate(gnewPosition, (getHeight() - mDrawableCenter.getIntrinsicHeight()) / 2);
mDrawableCenter.draw(canvas);
canvas.save();
int nggewPosition=getPaddingLeft() + getPaddingRight()+mDrawableCenter.getIntrinsicWidth()+ (int)getResources().getDimension(R.dimen._5sdp);
Paint textPaint = new Paint();
int yPos = (int) (getHeight() - ((textPaint.descent() + textPaint.ascent())) / 2);
canvas.translate(nggewPosition, yPos);
canvas.drawText(getText().toString(), nggewPosition, yPos, textPaint);
canvas.restore();
}
}
}
}
here is the attr,
<attr name="drawableCenter" format="reference"/>
<declare-styleable name="CenterDrawableButton">
<attr name="drawableCenter"/>
</declare-styleable>
I am trying to implement Masking of an image for my android project.
I am trying to accomplish the same as below image :
and the output would be the same as below link:
The link below is close to what I want to achieve only that I need to create the mask at runtime and handle onTouchListener to draw the mask but how?
Masking(crop) image in frame
I can't figure out myself and I feel stuck at this problem.
Any help or tutorials that will help is highly appreciated.
Although I didn't write a complete solution it could show you right direction.
package com.example.masktest.app;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
public class MaskDrawingView extends View {
private Path path = new Path();
private Paint pathPaint = new Paint();
public MaskDrawingView(Context context) {
super(context);
init();
}
public MaskDrawingView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public MaskDrawingView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
pathPaint.setStyle(Paint.Style.STROKE);
pathPaint.setAlpha(150);
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawPath(path, pathPaint);
invalidate();
}
#Override
public boolean onTouchEvent(#NonNull MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
path.lineTo(event.getX(), event.getY());
break;
}
return super.onTouchEvent(event);
}
public Bitmap finishDrawingAndGetMask() {
pathPaint.setStyle(Paint.Style.FILL);
path.close();
setDrawingCacheEnabled(true);
Bitmap result = Bitmap.createBitmap(getDrawingCache());
setDrawingCacheEnabled(false);
path.reset();
return result;
}
}
I have written a class following some Android Tutorials. The class is stored as
"ToDoList\src\com.example.todolist\ToDoListItemView.java"
package com.example.todolist;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;
public class ToDoListItemView extends TextView{
private Paint marginPaint,linePaint;
private int paperColor;
private float margin;
public ToDoListItemView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public ToDoListItemView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public ToDoListItemView(Context context) {
super(context);
init();
}
private void init(){
Resources myResources = getResources();
//Create the paint resources to be used in the onDraw method
marginPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
marginPaint.setColor(myResources.getColor(R.color.notepad_margin));
linePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
linePaint.setColor(myResources.getColor(R.color.notepad_lines));
//Get paper background color and margin width
paperColor = myResources.getColor(R.color.notepad_paper);
margin = myResources.getDimension(R.dimen.notepad_margin);
}
#Override
public void onDraw(Canvas canvas) {
canvas.drawColor(paperColor);
//Draw ruled lines
canvas.drawLine(0, 0, 0, getMeasuredHeight(), linePaint);
canvas.drawLine(0, getMeasuredHeight(), getMeasuredWidth(), getMeasuredHeight(), linePaint);
//Draw margin
canvas.drawLine(margin, 0, margin, getMeasuredHeight(), marginPaint);
//Move text across from the margin
canvas.save();
canvas.translate(margin, 0);
//Render
super.onDraw(canvas);
canvas.restore();
}
}
When I create a new layout in
"ToDoList\res\layout"
with any name, it I type "com.", it automatically recommends me the path
"com.example.todolist.ToDoListItemView"
I would like to know that what distinguishing feature in my "ToDoListItemView.java" made eclipse believe that it is a layout?
It recommends ToDoListItemView because it's a CustomView.
Eclipse recognizes that your class ToDoListItemView is derived from TextView which is derived from View.
All classes extending View can be used in a layout.
If your class does not in some way extend View, it cannot be placed into a layout.