Android自定义文本的进度条

 1 package com.example.myprogressbar;
 2 
 3 import android.content.Context;
 4 import android.graphics.Canvas;
 5 import android.graphics.Color;
 6 import android.graphics.Paint;
 7 import android.graphics.Rect;
 8 import android.text.TextUtils;
 9 import android.util.AttributeSet;
10 import android.util.Log;
11 import android.widget.ProgressBar;
12 
13 public class MyProgress extends ProgressBar {
14 
15     private Paint mPaint;
16     private String text;
17     public MyProgress(Context context) {
18         super(context);
19     }
20 
21     public MyProgress(Context context, AttributeSet attrs, int defStyle) {
22         super(context, attrs, defStyle);
23     }
24 
25     public MyProgress(Context context, AttributeSet attrs) {
26         super(context, attrs);
27     }
28     //加载完布局文件，对自定义的MyProgressBar进行初始化
29     @Override
30     protected void onFinishInflate() {
31         super.onFinishInflate();
32         init();
33     }
34     //初始化画笔
35     private void init() {
36         this.mPaint = new Paint();
37         this.mPaint.setColor(Color.BLACK);//画笔的颜色
38         this.mPaint.setTextSize(20);//画笔字体大小
39     }
40     //暴露方法，用来指定进度条上的自定义文本
41     public void setText(String text)
42     {
43         if(TextUtils.isEmpty(text))
44         {
45             text = "";
46         }
47         this.text = text;
48         invalidate();//指定文本后需要调用onDraw重绘进度条
49     }
50     @Override
51     protected synchronized void onDraw(Canvas canvas) {
52         super.onDraw(canvas);
53         Rect rect = new Rect();
54         if(mPaint != null && this.text != null)
55         {
56             this.mPaint.getTextBounds(this.text, 0, this.text.length(), rect);
57             int y = (getHeight() /2) - rect.centerY();
58             canvas.drawText(this.text, 5, y, this.mPaint);//在进度条上画上自定义文本
59         }else
60         {
61             Log.i("luqh","mPaint or text is null");
62         }
63     }
64     @Override
65     public synchronized void setProgress(int progress) {
66         super.setProgress(progress);
67     }
68 }

 1 <RelativeLayout 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="com.example.myprogressbar.MainActivity" 
 6     android:background="#000000">
 7     
 8     <com.example.myprogressbar.MyProgress
 9         android:id="@+id/progress"
10         style="@android:style/Widget.ProgressBar.Horizontal"
11         android:layout_width="400dp"
12         android:layout_height="40dp"
13         android:layout_centerInParent="true"
14         android:progressDrawable="@drawable/myprocess_bar_style"
15         android:max="100" >
16     </com.example.myprogressbar.MyProgress>
17 </RelativeLayout>

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
 3     <item android:id="@android:id/background"><!-- 为进度条背景设置样式 -->
 4         <shape>
 5             <corners android:radius="8dp" /><!-- 进度条圆角程度 -->
 6             <!-- 进度条开始颜色、结束颜色。如果两个值设置不一样将出现渐变效果 ，下同-->
 7             <gradient 
 8                 android:endColor="#ffffff"
 9                 android:startColor="#ffffff" >
10             </gradient>
11         </shape>
12     </item>
13     <item android:id="@android:id/progress"><!-- 为进度条  进度条部分 设置样式 -->
14         <clip>
15             <shape>
16                 <corners android:radius="8dp" />
17                 <gradient
18                     android:endColor="#FF0000"
19                     android:startColor="#FF0000" >
20                 </gradient>
21             </shape>
22         </clip>
23     </item>
24 
25 </layer-list>

 1 public class MainActivity extends Activity {
 2  
 3     private MyProgress progress;
 4     @Override
 5     protected void onCreate(Bundle savedInstanceState) {
 6         super.onCreate(savedInstanceState);
 7         setContentView(R.layout.activity_main);
 8         progress = (MyProgress) findViewById(R.id.progress);
 9         //设置自定义的文本
10         progress.setText("一共50笔收益，成功的占比例20%");
11         //为保证进度与上述自定义文本中的20%一致，还需要设置增加如下代码
12         progress.setProgress(20);
13     }
14 }