在ProgressBar上加文字----显示百分比的进度条

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Rect;

import android.util.AttributeSet;

import android.widget.ProgressBar;

public class MyProgress extends ProgressBar{

String text;

Paint mPaint;

public MyProgress(Context context) {

super(context);

// TODO Auto-generated constructor stub

System.out.println("1");

initText();

}

public MyProgress(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

// TODO Auto-generated constructor stub

System.out.println("2");

initText();

}

public MyProgress(Context context, AttributeSet attrs) {

super(context, attrs);

// TODO Auto-generated constructor stub

System.out.println("3");

initText();

}

@Override

public synchronized void setProgress(int progress) {

// TODO Auto-generated method stub

setText(progress);

super.setProgress(progress);

}

@Override

protected synchronized void onDraw(Canvas canvas) {

// TODO Auto-generated method stub

super.onDraw(canvas);

//this.setText();

Rect rect = new Rect();

this.mPaint.getTextBounds(this.text, 0, this.text.length(), rect);

int x = (getWidth() / 2) - rect.centerX();

int y = (getHeight() / 2) - rect.centerY();

canvas.drawText(this.text, x, y, this.mPaint);

}

//初始化，画笔

private void initText(){

this.mPaint = new Paint();

this.mPaint.setColor(Color.WHITE);
this.mPaint.setTextSize(18);

//去掉锯齿

this.mPaint.setFlags(Paint.ANTI_ALIAS_FLAG);

}

private void setText(){

setText(this.getProgress());

}

//设置文字内容

private void setText(int progress){

int i = (progress * 100)/this.getMax();

this.text = String.valueOf(i) + "%";

}

}

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package com.xxxxxxapplaction.ui;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ProgressBar;

public class TestOntimeStartTestActivity extends Activity{

private ProgressBar progressBar;

private Button startButton;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.test_start_test);

progressBar = (ProgressBar) findViewById(R.id.progress_horizontal);

progressBar.setVisibility(View.VISIBLE);

// 添加updataThread到消息队列

handler.post(updateThread);

}

// 使用匿名内部类来复写Handler当中的handlerMessage()方法

// 这个handler是需要反复执行的，直到消息队列中没有Message为止。

// 执行过程中把进度条就刷新了。

Handler handler = new Handler() {

@Override

public void handleMessage(Message msg) {

System.out.println("----------start handle");

progressBar.setProgress(msg.arg1);

handler.post(updateThread); // 将要执行的线程放入到队列当中

}

};

// 线程类，该类使用匿名内部类的方式进行声明

Runnable updateThread = new Runnable() {

int i = 0;

public void run() {

// TODO Auto-generated method stub

System.out.println("----------Begin Thread");

i += 5;

// 得到一个消息对象，Message类是android系统提供的

Message msg = handler.obtainMessage();

// 将Message对象的arg1参数的值设置为i

msg.arg1 = i; // 用arg1、arg2这两个成员变量传递消息，优点是系统性能消耗较少

try {

Thread.sleep(1000); // 让当前线程休眠1000毫秒

} catch (InterruptedException ex) {

ex.printStackTrace();

}

// 将Message对象加入到消息队列当中，等下次looper调用消息队列时，使用这个message显示进度条

// 或者说，把增加了10%的进度信息Message放到updateBarHandler的队列中。

if (i < 101){

handler.sendMessage(msg);

}

// 如果i的值等于100

if (i == 100) {

// 将线程对象从队列中移除

handler.removeCallbacks(updateThread);

}

}

};

}

<com.xxxxx.applaction.pub.MyProgress

android:id="@+id/progress_horizontal"

android:layout_below="@id/proccesstext"

style="?android:attr/progressBarStyleHorizontal"

android:layout_width="200dip"

android:layout_height="wrap_content"

android:layout_marginTop="15dp"

android:max="100"

android:progress="0"

android:layout_centerHorizontal="true"

android:background="@drawable/progress_bg"

android:secondaryProgress="0" />