Andriod课程设计(2)

第四步：安装Android ADT插件

运行Eclipse，选择help->install new software 选择add，将会弹出一个框

图 3.4

点击OK，选择要安装的软件，占next，然后选择接受协议，直到安装成功，重启Eclipse软件，设置Android SDK Home，Window->refrence

图 3.5

在SDK location中输入SDK Tools路径：D:\\android

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software\\android-sdk-windows 点击OK

3.2其他主要代码：

1. package org.vhow.paintpad.drawings;

import org.vhow.paintpad.tools.Brush;

import android.graphics.Canvas; /**

* A circle. */

public class Circle extends Drawing { @Override public void draw(Canvas canvas) { canvas.drawCircle( this.startX + (this.stopX - this.startX) / 2, this.startY + (this.stopY - this.startY) / 2, Math.abs(this.startX - this.stopX) / 2, Brush.getPen()); } }

2. package org.vhow.paintpad.drawings;

import android.graphics.Canvas; /**

* Abstract shape. All the shapes in this application extends this class. */

public abstract class Drawing { public float startX; public float startY; public float stopX; public float stopY; public void reset() {

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this.startX = 0; this.startY = 0; this.stopX = 0; this.stopY = 0; } /** * A abstract method, that all the shapes must implement. * * @param canvas * A canvas to draw on. */ public abstract void draw(Canvas canvas); public void fingerDown(float x, float y, Canvas canvas) { this.reset(); this.startX = x; this.startY = y; } public void fingerMove(float x, float y, Canvas canvas) { this.stopX = x; this.stopY = y; } public void fingerUp(float x, float y, Canvas canvas) { this.stopX = x; this.stopY = y; this.draw(canvas); this.reset(); } }

3．package org.vhow.paintpad.drawings; /**

* Factory class, used to generate drawing. */

public class DrawingFactory { Drawing drawing = null;

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/** * @param id * The id of the drawing. * @return The Drawing instance with the id. */ public Drawing createDrawing(int id) { switch (id) { case DrawingId.DRAWING_PATHLINE: drawing = new PathLine(); break; case DrawingId.DRAWING_STRAIGHTLINE: drawing = new StraightLine(); break; case DrawingId.DRAWING_RECT: drawing = new Rect(); break; case DrawingId.DRAWING_OVAL: drawing = new Oval(); break; case DrawingId.DRAWING_CIRCLE: drawing = new Circle(); break; case DrawingId.DRAWING_POINTS: drawing = new Points(); break; case DrawingId.DRAWING_ERASER: drawing = new Eraser(); break; } return drawing; } }

4. package org.vhow.paintpad.drawings; /**

* Defines the IDs of the drawings. */

public class DrawingId { public static final int DRAWING_PATHLINE = 0;

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public static final int DRAWING_STRAIGHTLINE = 1; public static final int DRAWING_RECT = 2; public static final int DRAWING_OVAL = 3; public static final int DRAWING_CIRCLE = 4; public static final int DRAWING_POINTS = 5; public static final int DRAWING_ERASER = 6; }

5. package org.vhow.paintpad.drawings;

import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; /**

* An earser, drawing the track line with the color of the bitmap's background * color. */

public class Eraser extends Drawing { Path mPath = null; private float mX, mY; private static final float TOUCH_TOLERANCE = 4; Paint eraser; public Eraser() { mPath = new Path(); eraser = new Paint(); eraser.setColor(Color.WHITE); eraser.setStrokeWidth(5f); } @Override public void draw(Canvas canvas) { System.out.println(\ canvas.drawPath(this.mPath, eraser); } @Override public void fingerDown(float x, float y, Canvas canvas) { mPath.reset();

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