一时兴起用android原生的基础绘制工具，绘制了一个正弦(余弦)函数图象，不多说，先上图：

MainView.java类

package com.zhaofeng.main;

import javax.crypto.SealedObject;

import android.app.Activity;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Path;

import android.graphics.Point;

import android.os.Bundle;

import android.os.Handler;

import android.view.SurfaceHolder;

import android.view.SurfaceHolder.Callback;

import android.view.SurfaceView;

public class MainView extends Activity {

/** Called when the activity is first created. */

private SurfaceView surfaceView;

private Paint paint;

private SurfaceHolder surfaceHolder;

private int scale_x = 20;

private int scale_y = 50;

private double ox=10;

private double oy=240;

private double x=0;

private double y=0;

private double t=0;

private boolean flag=true;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

surfaceView = (SurfaceView) findViewById(R.id.main_suf);

surfaceHolder = surfaceView.getHolder();

paint = new Paint();

surfaceHolder.addCallback(new Callback() {

@Override

public void surfaceDestroyed(SurfaceHolder holder) {

// TODO Auto-generated method stub

}

@Override

public void surfaceCreated(SurfaceHolder holder) {

// TODO Auto-generated method stub

new Thread(new Runnable() {

@Override

public void run() {

// TODO Auto-generated method stub

while (flag) {

try {

Thread.sleep(10);

Canvas canvas=surfaceHolder.lockCanvas();

if(canvas!=null)

{

//绘制坐标轴

paint.setColor(Color.WHITE);

canvas.drawText("O",20,220, paint);

paint.setColor(Color.BLUE);

canvas.drawLine(10,10,10,480, paint);

canvas.drawText("Y",20,30, paint);

paint.setColor(Color.GREEN);

canvas.drawLine(0,240,320,240, paint);

canvas.drawText("X",300,260, paint);

//绘制正弦曲线

t+=0.1;

x=t*scale_x;

y=Math.sin(t)*scale_y+240;

System.out.println("---------"+Math.round(Math.sin(t)));

if (t>0) {

paint.setColor(Color.RED);

canvas.drawLine(10+(int)ox,(int)oy,10+(int)x,(int)y, paint);

System.out.println(x+"s"+y);

}

ox=x;

oy=y;

if (t>15) {

flag=false;

}

}

surfaceHolder.unlockCanvasAndPost(canvas);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}).start();

}

@Override

public void surfaceChanged(SurfaceHolder holder, int format, int width,

int height) {

// TODO Auto-generated method stub

}

});

}

}

main.xml

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

android:id="@+id/main_suf"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:text="@string/hello"

/>