PieView.java

package com.msh_n.myp.customview1;

import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.RectF;
import android.media.Image;
import android.os.Build;
import android.support.annotation.Nullable;
import android.support.annotation.RequiresApi;
import android.support.v7.widget.AppCompatButton;
import android.support.v7.widget.AppCompatImageView;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.Display;
import android.view.View;
import android.widget.Button;



public class PieView extends View {

    int radius;
    float angle;

    Paint paintBackground;
    Paint paintV;
    Paint paintShadow;

    Rect rect;

    int backColor;
    int viewColor;
    int height =500;
    int width=250;
    int ori;
    int actionBarHeight;
    RectF rectCircle;
    RectF rectOval;

    public PieView(Context context){
        //this(context, null, 0);
        super(context);

    }

    public PieView(Context context, AttributeSet attrs){
        //this(context, attrs, 0);
        super(context, attrs);
        init(context, attrs);


    }

    public PieView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {

        super(context, attrs, defStyleAttr);
        init(context, attrs);

    }

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public PieView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes){
        super(context, attrs, defStyleAttr, defStyleRes);
        init(context, attrs);
    }

    public String getTitleText(){
        return titleText;
    }

    public void setTitleText(String str){
        titleText = str;
    }

    public int getRadius(){

        return radius;
    }

    public float getAngle() {
        return angle;
    }

    public void setAngle(float ang) {
        this.angle = ang;
    }

    protected void init(Context context, @Nullable AttributeSet attrs){

        angle = 5;
        rect = new Rect();

        // finding height of the action bar
        TypedValue tv = new TypedValue();
        context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true);
        actionBarHeight = getResources().getDimensionPixelSize(tv.resourceId);

        paintBackground = new Paint(Paint.ANTI_ALIAS_FLAG);
        paintV = new Paint();
        paintShadow = new Paint();


        //height = getLayoutParams().height;
        //width = getLayoutParams().width;

        //width = getMeasuredWidth();
        //height = getMeasuredHeight();

        ori = ((Activity) context).getResources().getConfiguration().orientation;

        if(attrs == null){
            backColor = getResources().getColor(android.R.color.holo_purple);
            viewColor = getResources().getColor(android.R.color.holo_green_light);

            paintBackground.setColor(backColor);
            paintV.setColor(viewColor);
            paintShadow.setColor(getResources().getColor(android.R.color.holo_purple));

            return;
        }

        TypedArray a = context.getTheme().obtainStyledAttributes(attrs,
                R.styleable.PieView, 0, 0);

        try {
            titleText = a.getString(R.styleable.PieView_titleText);
            backColor = a.getColor(R.styleable.PieView_backgroundColor,
                    getResources().getColor(android.R.color.holo_blue_light));
            viewColor = a.getColor(R.styleable.PieView_viewColor,
                    getResources().getColor(android.R.color.holo_orange_dark));


        } finally {
            a.recycle();
        }

        paintBackground.setColor(backColor);
        paintV.setColor(viewColor);
        paintShadow.setColor(getResources().getColor(android.R.color.holo_purple));



    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);

        width = w;
        //height = h + actionBarHeight;
        height = h;

        //rectCircle = new  RectF(width/2, 0, (3/4)*width, height/3);
        rectCircle = new  RectF(width/4, 0, 3*width/4, height/3);

        rectOval = new
                RectF(width/4, 0,width/2+width/3, height/3);


        boolean isWidthLarger = width > height/3;

        if(isWidthLarger){
            radius = height/6;
        }else{
            radius = width/2;
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){

        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);

        int desiredWidth = 1000;
        int desiredHeight = 1500;

        int width;
        int height;

        //width
        if(widthMode == MeasureSpec.EXACTLY){
           //Must be this size
            width = widthSize;

        }else if(widthMode == MeasureSpec.AT_MOST){
            //Can't be bigger than...
            width = Math.min(widthSize, desiredWidth);

        }else{
            //Be whatever you want
            width = desiredWidth;
        }

        //height
        if(heightMode == MeasureSpec.EXACTLY){
            //Must be this size
            height = heightSize;

        }else if(heightMode == MeasureSpec.AT_MOST){
            //Can't be bigger than...
            height = Math.min(heightSize, desiredHeight);

        }else{
            //Be whatever you want
            height = desiredHeight;
        }

        //MUST CALL THIS
        setMeasuredDimension(width, height);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        rect.left = 0;
        rect.top = 0;
        if(ori == Configuration.ORIENTATION_PORTRAIT) {
            rect.bottom = height / 3;
            rect.right = width;

            RectF rect2 = new RectF();
            rect2.left = 0;
            rect2.right = width;
            rect2.bottom = height;
            rect2.top = 0;

            /*boolean isWidthLarger = width > height/3;
            int r;
            if(isWidthLarger){
                r = height/6;
            }else{
                r = width/2;
            }*/

            //canvas.drawRect(rect2, paintBackground);
            canvas.drawRect(rect, paintBackground);
            //canvas.drawOval(rectOval, paintShadow);
            canvas.drawRect(rectCircle, paintShadow);

            canvas.drawArc(rectCircle, 0, angle, true, paintV);

            canvas.drawCircle(width/2, height/6, radius/1.2f, paintShadow);

            
        }else if(ori == Configuration.ORIENTATION_LANDSCAPE){

            
        }

    }

}