下面是一個畫各種圖形的例子，具體的畫圖方法不用特別解釋，看API就可以了

先定義一個繼承自View的類DrawView

package WangLi.Graphics.MyView;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.LinearGradient;import android.graphics.Paint;import android.graphics.Path;import android.graphics.RectF;import
 
 android.graphics.Shader;import android.util.AttributeSet;import android.view.View;public class DrawView extends View {    public DrawView(Context context,AttributeSet set)    {     super(context,set);    }    @Override    //重寫該方法,進行繪圖    protected void onDraw(Canvas canvas)    {     super.onDraw(canvas);     //把整張畫布繪製成白色
 
     canvas.drawColor(Color.WHITE);     Paint paint = new Paint();     //去鋸齒     paint.setAntiAlias(true);     paint.setColor(Color.BLUE);     paint.setStyle(Paint.Style.STROKE);     paint.setStrokeWidth(3);     //繪製圓形     canvas.drawCircle(40, 40, 30, paint);     //繪製正方形     canvas.drawRect(10,80,70,140, paint);     //繪製矩形
 
     canvas.drawRect(10,150,70,190, paint);     RectF re1 = new RectF(10,200,70,230);     //繪製圓角矩形     canvas.drawRoundRect(re1, 15, 15, paint);     RectF rel1 = new RectF(10,240,70,270);     //繪製橢圓     canvas.drawOval(rel1, paint);     //定義一個Path物件,封閉成一個三角形     Path path1 = new Path();     path1.moveTo(10, 340);     path1.lineTo(70, 340);     path1.lineTo(40, 290);     path1.close();     //根據path進行繪製,繪製三角形     canvas.drawPath(path1,paint);          //根據path進行繪製,封閉成一個五角形     Path path2 = new Path();     path2.moveTo(26, 360);     path2.lineTo(54, 360);     path2.lineTo(70, 392);     path2.lineTo(40, 420);     path2.lineTo(10, 392);     path2.close();     //根據path進行繪製,繪製五角形     canvas.drawPath(path2,paint);     //-----------------設定填充風格後繪製------------------     paint.setStyle(Paint.Style.FILL);     paint.setColor(Color.RED);     canvas.drawCircle(120, 40, 30, paint);     //繪製正方形     canvas.drawRect(90, 80, 150, 140, paint);     //繪製矩形     canvas.drawRect(90, 150, 150, 190, paint);     RectF re2 = new RectF(90,200,150,230);     //繪製圓角矩形     canvas.drawRoundRect(re2, 15, 15, paint);     RectF re21 = new RectF(90,240,150,270);     //繪製橢圓     canvas.drawOval(re21, paint);     Path path3 = new Path();     path3.moveTo(90, 340);     path3.lineTo(150, 340);     path3.lineTo(120, 290);     path3.close();     //繪製三角形     canvas.drawPath(path3, paint);     Path path4 = new Path();     path4.moveTo(106, 360);     path4.lineTo(134, 360);     path4.lineTo(150, 392);     path4.lineTo(120, 420);     path4.lineTo(90, 392);     path4.close();     //繪製五角形     canvas.drawPath(path4, paint);     //-----------------設定漸變後繪製------------------     //為Paint設定漸變器     Shader mShader = new LinearGradient(0,0,40,60,       new int[]{       Color.RED,Color.GREEN,Color.BLUE,Color.YELLOW},       null,Shader.TileMode.REPEAT);     //為Paint設定漸變器     paint.setShader(mShader);     //設定陰影     paint.setShadowLayer(45, 10, 10, Color.GRAY);     //繪製圓形     canvas.drawCircle(200, 40, 30, paint);     //繪製正方形     canvas.drawRect(170, 80, 230, 140, paint);     //繪製矩形     canvas.drawRect(170, 150, 230, 190, paint);     RectF re3 = new RectF(170,200,230,230);     //繪製圓角矩形     canvas.drawRoundRect(re3, 15, 15, paint);     RectF re31 = new RectF(170,240,230,270);     //繪製橢圓     canvas.drawOval(re31, paint);     Path path5 = new Path();     path5.moveTo(170, 340);     path5.lineTo(230, 340);     path5.lineTo(200, 290);     path5.close();     //繪製三角形     canvas.drawPath(path5, paint);     Path path6 = new Path();     path6.moveTo(186, 360);     path6.lineTo(214, 360);     path6.lineTo(230, 392);     path6.lineTo(200, 420);     path6.lineTo(170, 392);     path6.close();     //繪製五角形     canvas.drawPath(path6, paint);    }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical"     android:id="@+id/root">　　<WangLi.Graphics.MyView.DrawView android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>

canvas.drawText("some text",x,y,paint);

下面是執行的效果圖