Mars_ProgressBar

<?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:orientation="vertical"
    tools:context="com.example.pengtuanyuan.progressbardemo.MainActivity">

    <TextView
        android:id="@+id/textView1"

        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/Hello"/>

    <ProgressBar
        android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:visibility="gone"/>

    <ProgressBar
        android:id="@+id/progressBar2"
        style="?android:attr/progressBarStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:max="100"
        android:visibility="gone"/>
    <Button
        android:id="@+id/myButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Begin"/>

</LinearLayout>
---------------------------------------------------------

package com.example.pengtuanyuan.progressbardemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;

public class MainActivity extends AppCompatActivity {
    private ProgressBar firstBar=null;
    private ProgressBar secondBar=null;
    private Button button=null;
    private int i=0;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        firstBar=(ProgressBar)findViewById(R.id.progressBar1);
        secondBar=(ProgressBar)findViewById(R.id.progressBar2);
        button=(Button)findViewById(R.id.myButton);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(i==0){
                    firstBar.setVisibility(View.VISIBLE);
                    secondBar.setVisibility(View.VISIBLE);
                }
                else if (i<firstBar.getMax()){
                    firstBar.setProgress(i);
                    firstBar.setSecondaryProgress(i+10);
                }else {
                    firstBar.setVisibility(View.GONE);
                    secondBar.setVisibility(View.GONE);
                }
                i=i+10;
            }
        });
    }
}