TOP5_3：定制简单的进度条

结构：

Activity:

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"
 4     android:layout_width="match_parent" android:layout_height="match_parent"
 5     android:paddingBottom="@dimen/activity_vertical_margin"
 6     android:paddingLeft="@dimen/activity_horizontal_margin"
 7     android:paddingRight="@dimen/activity_horizontal_margin"
 8     android:paddingTop="@dimen/activity_vertical_margin"
 9     tools:context="com.example.top5.MainActivity">
10 
11    <com.example.top5_3.MyProgressBar
12        android:id="@+id/pb"
13        android:layout_width="match_parent"
14        android:layout_height="wrap_content"
15        android:max="100"
16        style="@android:style/Widget.ProgressBar.Horizontal"/>
17 </RelativeLayout>

JAVA:

MainActivity:

 1 package com.example.top5_3;
 2 
 3 
 4 
 5 
 6 import android.app.Activity;
 7 import android.os.Handler;
 8 import android.os.Message;
 9 
10 import android.os.Bundle;
11 import android.view.Menu;
12 import android.widget.ProgressBar;
13 
14 public class MainActivity extends Activity {
15     private MyProgressBar pb;
16 
17     Handler hd = new Handler() {
18         public void handleMessage(Message msg) {
19             pb.setProgress(msg.what);
20         }
21     };
22 
23     protected void onCreate(Bundle savedInstanceState) {
24         super.onCreate(savedInstanceState);
25         setContentView(R.layout.activity_main);
26         pb =  (MyProgressBar) findViewById(R.id.pb);
27         new Thread(new Runnable() {
28             @Override
29             public void run() {
30                 for (int i = 1; i <= 100; i+=1) {
31                     Message mg = new Message();
32                     mg.what = i;
33                     hd.sendMessage(mg);
34                     try {
35                         Thread.sleep(1000);
36                     } catch (InterruptedException e) {
37                         e.printStackTrace();
38                     }
39                 }
40             }
41         }).start();
42     }
43 
44     public boolean onCreateOptionsMenu(Menu menu)
45     {
46         getMenuInflater().inflate(R.menu.main, menu);
47         return true;
48     }
49 
50 }

MyProgressBar:

 1 package com.example.top5_3;
 2 
 3 import java.text.MessageFormat;
 4 
 5 import android.content.Context;
 6 import android.graphics.Canvas;
 7 import android.graphics.Color;
 8 import android.graphics.Paint;
 9 import android.graphics.Paint.Align;
10 import android.graphics.Paint.FontMetrics;
11 import android.util.AttributeSet;
12 import android.widget.ProgressBar;
13 
14 public class MyProgressBar extends ProgressBar {
15 private Paint paint=new Paint();
16     public MyProgressBar(Context context) {
17         super(context);
18         // TODO Auto-generated constructor stub
19     }
20 public MyProgressBar(Context cont,AttributeSet attrs) {
21     // TODO Auto-generated constructor stub
22     super(cont,attrs);
23 }
24 protected synchronized void onDraw(Canvas cv){
25     super.onDraw(cv);
26     //进度天百分比
27     int reta=(int)((double)getProgress()/this.getMax()*100);
28     //要绘制的文字
29     String tip=MessageFormat.format("{0}%",reta);
30     //设置文字对齐方式
31     paint.setTextAlign(Align.CENTER);
32     //设置文字颜色
33     paint.setColor(Color.BLUE);
34     //设置字体大小
35     paint.setTextSize(24);
36     //Canvas绘制文本时，使用 fontMetrics对象，计算坐标位置
37     FontMetrics fmt=paint.getFontMetrics();
38     int h=(int)((fmt.bottom-fmt.top)/2-fmt.bottom);
39     //进行绘制
40   cv.drawText(tip, this.getWidth()/2, this.getHeight()/2+h, paint);    
41     
42 }
43 }

 运行效果：

 

posted @ 2017-04-12 12:33  AndrioidCSY  阅读(317)  评论(0)  编辑  收藏  举报