android使用Canvas画柱状图和饼图源码

http://developer.aiwgame.com/canvas-draw-bar-charts-and-pie-charts-in-android.html

 

Canvas draw bar charts and pie charts in android！
Below is the result:

Main Activity PieColumar.java:

package com.dean;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;

import com.entity.CountEntity;

public class PieColumar extends Activity {
	CountEntity entity = new CountEntity();

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		DrawView myView = new DrawView(PieColumar.this);
		setContentView(myView);
	}

	public class DrawView extends View {
		private int value, location;
		// For statistical
		private double flagIn, flagOut, flagLeft;
		private float clotheRate, studyRate, trafficRate, otherRate;

		public DrawView(Context context) {
			super(context);
		}

		@Override
		protected void onDraw(Canvas canvas) {
			super.onDraw(canvas);
			// Set the background color to light gray
			canvas.drawColor(Color.LTGRAY);
			// Define a Paint
			Paint paint = new Paint();
			// Anti-aliasing
			paint.setAntiAlias(true);

			// Draw the abscissa
			paint.setColor(Color.BLACK);
			canvas.drawLine(40, 200, 300, 200, paint);
			// Draw the vertical axis
			paint.setColor(Color.BLACK);
			canvas.drawLine(40, 30, 40, 200, paint);
			// raw a horizontal line
			paint.setColor(Color.BLACK);
			for (int i = 170; i > 20; i -= 30) {
				canvas.drawLine(40, i, 280, i, paint);
			}
			// Set the title font size
			paint.setTextSize(18);
			paint.setColor(Color.RED);
			canvas.drawText(
					getResources().getString(R.string.graph_page_count), 65,
					26, paint);
			canvas.drawText(
					getResources().getString(R.string.graph_page_consume), 100,
					250, paint);
			// Set the font of each item is black
			paint.setColor(Color.BLACK);
			paint.setTextSize(15);
			// Income, expenditure, balance
			canvas.drawText(
					getResources().getString(R.string.second_page_countIn), 60,
					220, paint);
			canvas.drawText(
					getResources().getString(R.string.second_page_countOut),
					130, 220, paint);
			canvas.drawText(
					getResources().getString(R.string.second_page_countLeft),
					200, 220, paint);
			canvas.drawText(getResources().getString(R.string.graph_page_top),
					5, 40, paint);
			canvas.drawText(
					getResources().getString(R.string.graph_page_right), 265,
					218, paint);
			// The vertical axis corresponds to the value of
			for (value = 300, location = 180; value 1500) {
				entity.setIncome(1500);
				canvas.drawText(flagIn + "", 100, 45, paint);
			} else if (entity.getIncome() > 0 && entity.getIncome() 1500) {
				entity.setOutcome(1500);
				canvas.drawText(flagOut + "", 160, 45, paint);
			} else if (entity.getOutcome() > 0 && entity.getOutcome()1500) {
				entity.setLeft(1500);
				canvas.drawText(flagLeft + "", 220, 45, paint);
			} else if (entity.getLeft() >= 0 && entity.getLeft()

CountEntity.java

package com.entity;

public class CountEntity {
	double outClothe = 400;
	double outStudy = 200;
	double outTraffic = 150;
	double outOther = 450;
	double income = 1200;
	double outcome = 1050;
	double left = 150;

	public double getOutClothe() {
		return outClothe;
	}

	public void setOutClothe(double outClothe) {
		this.outClothe = outClothe;
	}

	public double getOutStudy() {
		return outStudy;
	}

	public void setOutStudy(double outStudy) {
		this.outStudy = outStudy;
	}

	public double getOutTraffic() {
		return outTraffic;
	}

	public void setOutTraffic(double outTraffic) {
		this.outTraffic = outTraffic;
	}

	public double getOutOther() {
		return outOther;
	}

	public void setOutOther(double outOther) {
		this.outOther = outOther;
	}

	public double getIncome() {
		return income;
	}

	public void setIncome(double income) {
		this.income = income;
	}

	public double getOutcome() {
		return outcome;
	}

	public void setOutcome(double outcome) {
		this.outcome = outcome;
	}

	public double getLeft() {
		return left;
	}

	public void setLeft(double left) {
		this.left = left;
	}
}

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">Android Developer - AiwGame.com</string>
    <string name="graph_page_count">Income, expenditure, balance of histogram</string>
    <string name="graph_page_consume">Income</string>
    <string name="second_page_countIn">Expend</string>
    <string name="second_page_countOut">Balance</string>
    <string name="second_page_countLeft">Subtotal</string>
    <string name="graph_page_top">$</string>
    <string name="graph_page_right">...</string>
    <string name="second_page_moneyoutOne">Clothes</string>
    <string name="second_page_moneyoutTwo">Study</string>
    <string name="second_page_moneyoutThree">Traffic</string>
    <string name="second_page_moneyoutFour">Other</string>

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