不同的进度条显示结果:

demo xml代码:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    tools:context=".util.ProgressActivity"
    android:padding="15dp">
    <ProgressBar
        android:id="@+id/pb1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    <ProgressBar
        android:id="@+id/pb2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        style="@android:style/Widget.ProgressBar"
        android:layout_marginTop="10dp"/>
    <!--  android:max="100"android:progress="10"
       总共为100,目前到10 android:secondaryProgress="30"
       第二个进度为30-->
    <ProgressBar
        android:id="@+id/pb3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="@android:style/Widget.ProgressBar.Horizontal"
        android:layout_marginTop="10dp"
        android:max="100"
        android:progress="10"
        android:secondaryProgress="30"/>
    <ProgressBar
        android:id="@+id/pb4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="@android:style/Widget.Material.ProgressBar.Horizontal"
        android:layout_marginTop="10dp"
        android:max="100"
        android:progress="10"
        android:secondaryProgress="30"/>
</LinearLayout>

二.模拟进度条加载过程:
运行展示图:

xml代码:

   <Button
        android:id="@+id/btn_start"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="模拟进度"
        android:layout_marginTop="10dp"/>

Activity代码:

package com.example.lineralayout.util;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.example.lineralayout.R;

public class ProgressActivity extends AppCompatActivity {
    private ProgressBar mPb3;
    private Button mBtnStart;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_progress);
        mPb3 = findViewById(R.id.pb3);
        mBtnStart = findViewById(R.id.btn_start);
        mBtnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                handler.sendEmptyMessage(0);
            }
        });
    }
    Handler handler = new Handler() {
        @Override
        public void handleMessage(@NonNull Message msg) {
            super.handleMessage(msg);
            if(mPb3.getProgress() < 100){
                handler.postDelayed(runnable,500);
            }else{
               ToastUtil.showMsg(ProgressActivity.this,"加载完成");
            }

        }
    };
    Runnable runnable = new Runnable() {
        @Override
        public void run() {
            mPb3.setProgress(mPb3.getProgress()+5);
            handler.sendEmptyMessage(0);
        }
    };
}

三.自定义加载图片

自定义drawable资源:

<?xml version="1.0" encoding="utf-8"?>
<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:drawable="@drawable/progress"
    android:pivotX="50%"
    android:pivotY="50%">
</animated-rotate>

应用:

    <ProgressBar
        android:id="@+id/pb5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        style="@android:style/Widget.ProgressBar"
        android:indeterminateDrawable="@drawable/bg_progress"
        android:layout_marginTop="10dp"/>