自定义View的封装

 1 package com.example.myview;
 2 
 3 import android.os.Bundle;
 4 import android.app.Activity;
 5 import android.view.Menu;
 6 
 7 public class MainActivity extends Activity {
 8 
 9     @Override
10     protected void onCreate(Bundle savedInstanceState) {
11         super.onCreate(savedInstanceState);
12         setContentView(R.layout.activity_main);
13         //setContentView(new Myview(this));
14     }
15 }

 1 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     tools:context=".MainActivity" >
 6     <com.example.myview.SubClass
 7         android:layout_width="match_parent"
 8         android:layout_height="match_parent"
 9          />
10 </FrameLayout>

 1 package com.example.myview;
 2 
 3 import java.util.Random;
 4 
 5 import android.content.Context;
 6 import android.graphics.Canvas;
 7 import android.graphics.Paint;
 8 import android.graphics.RectF;
 9 import android.util.AttributeSet;
10 import android.view.View;
11 
12 public abstract class TestClass extends View{
13 
14     private MyThread thread;
15     
16     public TestClass(Context context, AttributeSet attrs) {
17         super(context, attrs);
18     }
19 
20     public TestClass(Context context) {
21         super(context);
22     }
23     
24     protected abstract void drawSub(Canvas canvas);
25     protected abstract void logic();
26     
27     protected void onDraw(Canvas canvas){
28         if(thread==null){
29             thread = new MyThread();
30             thread.start();
31         }else{
32             drawSub(canvas);
33         }
34     }
35 
36 
37     class MyThread extends Thread{
38         @Override
39         public void run() {
40             while(true){
41                 logic();
42                 postInvalidate();
43                 try {
44                     Thread.sleep(30);
45                 } catch (InterruptedException e) {
46                     e.printStackTrace();
47                 }
48             }
49             
50         }
51     }
52     
53 }

 1 package com.example.myview;
 2 
 3 import java.util.Random;
 4 
 5 import android.content.Context;
 6 import android.graphics.Canvas;
 7 import android.graphics.Paint;
 8 import android.graphics.RectF;
 9 import android.util.AttributeSet;
10 
11 
12 public class SubClass extends TestClass{
13 
14     private Paint paint = new Paint();
15     private float rx = 0;
16     private RectF rectF = new RectF(0,60,100,160);
17     private float sweepAngel = 0;
18     Random rand = new Random();
19     
20     public SubClass(Context context) {
21         super(context);
22     }
23 
24     public SubClass(Context context, AttributeSet attrs) {
25         super(context, attrs);
26     }
27 
28     @Override
29     protected void drawSub(Canvas canvas) {
30         paint.setTextSize(30);
31         canvas.drawText("LogicView", rx, 30, paint);
32         
33         canvas.drawArc(rectF,0,sweepAngel,true,paint);
34     }
35 
36     @Override
37     protected void logic() {
38         rx++;
39         if(rx > getWidth()){
40             rx = 0 - paint.measureText("LogicView");
41         }
42         
43         sweepAngel ++ ;
44         
45         if(sweepAngel > 360){
46             sweepAngel = 0; 
47         }
48         int r = rand.nextInt(256);
49         int g = rand.nextInt(256);
50         int b = rand.nextInt(256);
51         paint.setARGB(255, r, g, b);        
52     }
53 
54 }