一)前言

今天我们一起来看一下进度载入条ProgressBarAndroid控件的解说与基本使用。

(二)使用介绍

ProgressBarAndroid控件使用起来相对来讲还是很easy的。首先我们来看一下官方的写的一个样例：

```java

import com.github.johnpersano.supertoasts.library.Style;

import com.github.johnpersano.supertoasts.library.SuperActivityToast;

import com.github.johnpersano.supertoasts.library.Style.COLOR_TYPE;

import com.github.johnpersano.supertoasts.library.Style.TEXT_TYPE;

import com.github.johnpersano.supertoasts.library.utils.ResourcesWrapper;

import com.google.android.material.tabs.TabLayout;

import androidx.appcompat.app.AppCompatActivity;

import androidx.viewpager2.widget.ViewPager2;

import android.os.Bundle;

import android.view.View;

import androidx.annotation.NonNull;

import androidx.annotation.Nullable;

import androidx.fragment.app.Fragment;

import androidx.fragment.app.FragmentManager;

import androidx.fragment.app.FragmentPagerAdapter;

import androidx.viewpager2.widget.ViewPager2;

import java.util.ArrayList;

import java.util.List;

public class MainActivity extends AppCompatActivity {

private ViewPager2 viewPager2;

private TabLayout tabLayout;

private List titles = new ArrayList<>();

private List fragments = new ArrayList<>();

private MyPagerAdapter adapter;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initView();

initData();

}

private void initView() {

viewPager2 = findViewById(R.id.view_pager);

tabLayout = findViewById(R.id.tab_layout);

}

private void initData() {

titles = new ArrayList<>();

titles.add("首页");

titles.add("新闻");

titles.add("我的消息");

fragments = new ArrayList<>();

fragments.add(new HomeFragment());

fragments.add(new NewsFragment());

fragments.add(new MessageFragment());

adapter = new MyPagerAdapter(getSupportFragmentManager(), titles, fragments);

viewPager2.setAdapter(adapter);

tabLayout.setupWithViewPager(viewPager2);

}

}

```

但是大家细致看以上的代码会发现：这里面的标签怎么是ProgressBar呢？事实上官方文档这些写是有一点误导性的，假设你直接这样写，肯定会报错，查看官方Demo样例你会发如今该样例文件顶端须要引入ProgressBarAndroid组件例如以下：

```java

import com10143678589600759194imlib2demoactivitym10143678589600759194imlib2demosharedpreferencesm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm10143678589600759194imlib2demoutilsm1014367858960075