Android 柱状图源码.zip

package cn.knight.barchart ; import android.content.Context ; import android.graphics.Canvas ; import android.graphics.Color ; import android.graphics.Paint ; import android.view.View ; public class ChartView extends View { private int[] data_screen ; private int[] data_power ; private int[] data_total ; private int flag ; private int margin ; private Chart chart ; private Paint paint ; public ChartView(Context context, int flag) { super(context) ; this.flag = flag ; margin = 0 ; chart = new Chart() ; data_screen = new int[] {90, 65, 80, 115 } ; data_power = new int[] {150, 125, 100, 130 } ; data_total = new int[4] ; for (int i = 0; i < 4; i++) data_total[i] = data_screen[i] + data_power[i] ; paint = new Paint() ; paint.setAntiAlias(true) ; } public void drawAxis(Canvas canvas) { paint.setColor(Color.YELLOW) ; paint.setStrokeWidth(2) ; canvas.drawLine(30, 300, 310, 300, paint) ; canvas.drawLine(30, 20, 30, 300, paint) ; int x = 90 ; int y = 250 ; for (int i = 0; i < 4; i++) { canvas.drawText(i + 1 + "", x, 320, paint) ; x += 60 ; } for (int i = 0; i < 5; i++) { canvas.drawText(50 * (i + 1) + "", 0, y, paint) ; y -= 50 ; } } public void drawChart(Canvas canvas) { if (flag == 1) { paint.setColor(Color.GREEN) ; int temp_screen = 30 ; for (int i = 0; i < 4; i++) { chart.setH(data_screen[i]) ; chart.setX(temp_screen + 20 * 2 + margin) ; chart.drawSelf(canvas, paint) ; margin = 20 ; temp_screen = chart.getX() ; } margin = 0 ; paint.setColor(Color.BLUE) ; int temp_power = 50 ; for (int i = 0; i < 4; i++) { chart.setH(data_power[i]) ; chart.setX(temp_power + 20 * 2 + margin) ; chart.drawSelf(canvas, paint) ; margin = 20 ; temp_power = chart.getX() ; } drawHighLines(canvas) ; } else if (flag == 2) { paint.setColor(Color.GREEN) ; int temp = 40 ; for (int i = 0; i < 4; i++) { chart.setH(data_total[i]) ; chart.setX(temp + 20 * 2 + margin) ; chart.drawSelf(canvas, paint) ; margin = 20 ; temp = chart.getX() ; } } } public void drawHighLines(Canvas canvas) { int[][] highPoints = new int[4][2] ; highPoints[0][0] = 90 ; highPoints[0][1] = data_total[0] ; highPoints[1][0] = 150 ; highPoints[1][1] = data_total[1] ; highPoints[2][0] = 210 ; highPoints[2][1] = data_total[2] ; highPoints[3][0] = 270 ; highPoints[3][1] = data_total[3] ; paint.setColor(Color.RED) ; for (int i = 0; i < 4; i++) { canvas.drawPoint(highPoints[i][0], 300 - highPoints[i][1], paint) ; canvas.drawText(data_total[i] + "", highPoints[i][0] - 10, 300 - highPoints[i][1] - 10, paint) ; } float[] pts = new float[16] ; for (int i = 0; i < 12; i++) { pts[0] = 32 ; pts[1] = 300 - highPoints[0][1] ; pts[2] = highPoints[0][0] ; pts[3] = 300 - highPoints[0][1] ; pts[4] = highPoints[0][0] ; pts[5] = 300 - highPoints[0][1] ; pts[6] = highPoints[1][0] ; pts[7] = 300 - highPoints[1][1] ; pts[8] = highPoints[1][0] ; pts[9] = 300 - highPoints[1][1] ; pts[10] = highPoints[2][0] ; pts[11] = 300 - highPoints[2][1] ; pts[12] = highPoints[2][0] ; pts[13] = 300 - highPoints[2][1] ; pts[14] = highPoints[3][0] ; pts[15] = 300 - highPoints[3][1] ; } canvas.drawLines(pts, paint) ; } @Override public void onDraw(Canvas canvas) { canvas.drawColor(Color.BLACK) ; drawAxis(canvas) ; drawChart(canvas) ; } }