How to create a ProgressBar programmatically?

My application needs to create a small ProgressBar programmatically. ProgressBar doesn't have a method to set the style (I want a small ProgressBar). The constructor can take an AttributeSet, however, it is an interface and requires me to implement a set of functi开发者_Python百科ons. Is there a way to set the ProgressBar to a small style? (I can't use XML to create ProgressBar.)

Most of the time if you provide an AttributeSet manually you have to use one of Android's. Luckily, they've exposed the attribute set that describes a small progress bar. Use this code:

progressBar = new ProgressBar(activity, null, android.R.attr.progressBarStyleSmall);

Create a layout xml file in res/layout directory with desired progress bar containig all attributes you need:

<?xml version="1.0" encoding="utf-8"?>
<ProgressBar
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content" ... />

Next in the Activity class you can create ProgressBar object from that layout:

LayoutInflater inflater = getLayoutInflater();
    ProgressBar bar = (ProgressBar ) inflater.inflate(R.layout.small_progress_bar, null);

where R.layout.small_progress_bar links to your layout xml file.

Can you still not use xml file?

Activity.java

  progressBar = (ProgressBar) findViewById(R.id.progressbar);
 `progressBar.setVisibility(View.VISIBLE);`// To Show ProgressBar 
 `progressBar.setVisibility(View.INVISIBLE);` //To Hide ProgressBar

Check here ProgressDialog is deprecated.What is the alternate one to use?