1.新建项目，布局文件如下：activity_main.xml
1 <LinearLayout 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 android:layout_marginLeft="10dp"
6 android:orientation="vertical" >
7
8 <Button 9 android:id="@+id/btn1"
10 android:layout_width="wrap_content"
11 android:layout_height="wrap_content"
12 android:text="显示" />
13
14 <Button 15 android:id="@+id/btn2"
16 android:layout_width="wrap_content"
17 android:layout_height="wrap_content"
18 android:text="隐藏" />
19
20 </LinearLayout>
2.后台代码如下：MainActivity.java
1 package com.example.testdemo; 2
3 import android.app.Activity; 4 import android.os.Bundle; 5 import android.view.View; 6 import android.view.View.OnClickListener; 7 import android.view.Window; 8 import android.widget.Button; 9
10 public class MainActivity extends Activity { 11
12 @Override 13 protected void onCreate(Bundle savedInstanceState) { 14 super.onCreate(savedInstanceState);// 以下两句代码必须写在setContentView之前否则不起作用
15 requestWindowFeature(Window.FEATURE_PROGRESS);// 进度指示器功能
16 requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); // 不确定的进度
17 setContentView(R.layout.activity_main); 18 Button btn1 = (Button) findViewById(R.id.btn1); 19 Button btn2 = (Button) findViewById(R.id.btn2); 20 // 展示标题栏进度条
21 btn1.setOnClickListener(new OnClickListener() { 22 @Override 23 public void onClick(View v) { 24 setProgressBarVisibility(true); 25 setProgressBarIndeterminateVisibility(true); 26 } 27 }); 28 // 隐藏标题栏进度条
29 btn2.setOnClickListener(new OnClickListener() { 30 @Override 31 public void onClick(View v) { 32 setProgressBarVisibility(false); 33 setProgressBarIndeterminateVisibility(false); 34 } 35 }); 36 } 37 }
3.效果如如下：
