Android—进度条

layout文件：

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="com.hanqi.testapp2.TestActivity4"
     android:orientation="vertical">

     <ProgressBar
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         style="?android:attr/progressBarStyleHorizontal"
         android:progress="0"
         android:secondaryProgress="0"
         android:max="80"
         android:id="@+id/pb_1"/>
     <ProgressBar
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         style="?android:attr/progressBarStyleLarge"
         android:id="@+id/pb_2"/>
     <SeekBar
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:progress="0"
         android:max="80"
         android:secondaryProgress="0"
         android:id="@+id/se_1"/>
     <RatingBar
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:numStars="5"
         android:rating="3.5"
         android:isIndicator="true"/>
 </LinearLayout>

java类代码：

 package com.hanqi.testapp2;

 import android.app.AlertDialog;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.ProgressBar;
 import android.widget.SeekBar;

 public class TestActivity4 extends AppCompatActivity {

     SeekBar se_1;
     ProgressBar pb_1;
     ProgressBar pb_2;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_test4);
         se_1 = (SeekBar)findViewById(R.id.se_1);
         pb_1 = (ProgressBar)findViewById(R.id.pb_1);
         pb_2 = (ProgressBar)findViewById(R.id.pb_2);

         AlertDialog alertDialog = new AlertDialog.Builder(this).create();

         se_1.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
             //进度变化触发
             @Override
             public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                 //设置进度条1的进度值
                 pb_1.setProgress(progress);
                 //判断是否达到最大值
                 if(progress ==se_1.getMax())
                 {
                     pb_2.setVisibility(View.INVISIBLE);//不显示但位置还保留
                 }
                 else
                 {
                     pb_2.setVisibility(View.VISIBLE);
                 }
                 //只要progress变化就会触发
                 //Toast.makeText(TestActivity4.this, "当前进度 = "+progress, Toast.LENGTH_SHORT).show();
             }

             @Override
             public void onStartTrackingTouch(SeekBar seekBar) {
                 Log.e("TAG","进度条开始拖动");
             }

             @Override
             public void onStopTrackingTouch(SeekBar seekBar) {
                 Log.e("TAG","进度条停止拖动");
             }
         });
     }
 }

效果为：