progressbar

(一）

1.效果图：点击增加进度条增加，点击减少，进度条减少，点击重置，进度条恢复到最初样子

2.activity_main.xml

<?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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.app2.MainActivity"
    android:orientation="vertical">

    <ProgressBar
        android:max="100"
        android:id="@+id/pbr"
        android:progress="20"
        android:secondaryProgress="30"
        style="@style/Widget.AppCompat.ProgressBar.Horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/btn_add"
        android:text="增加"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/btn_reduce"
        android:text="减少"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/btn_reset"
        android:text="重置"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/tv_show"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

3.MainActivity.java

package com.example.app2;

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

public class MainActivity extends AppCompatActivity {
    private ProgressBar progressBar;
    private Button button_add,button_reduce,button_reset;
    private TextView textView;
    private int max;
    private int progress,secondProgress;

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

        progressBar=(ProgressBar)findViewById(R.id.pbr);
        button_add=(Button)findViewById(R.id.btn_add);
        button_reduce=(Button)findViewById(R.id.btn_reduce);
        button_reset=(Button)findViewById(R.id.btn_reset);
        textView=(TextView)findViewById(R.id.tv_show);

        //获取进度条最大值
        max=progressBar.getMax();


        //获取进度条进度值
        progress = progressBar.getProgress();

        //获取第二进度条进度值
        secondProgress = progressBar.getSecondaryProgress();

        textView.setText("第一进度条半分比："+(int)(progressBar.getProgress()/(float)progressBar.getMax()*100)+"%"+ "第二进度条值："+(int)(secondProgress/(float)progressBar.getMax()*100)+"%");


        button_add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                progressBar.incrementProgressBy(10);
                progressBar.incrementSecondaryProgressBy(10);
                textView.setText("第一进度条半分比："+(int)(progressBar.getProgress()/(float)progressBar.getMax()*100)+"%"+ "第二进度条值："+(int)(progressBar.getSecondaryProgress()/(float)progressBar.getMax()*100)+"%");


            }
        });

        button_reduce.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                progressBar.incrementProgressBy(-10);
                progressBar.incrementSecondaryProgressBy(-10);
                textView.setText("第一进度条半分比："+(int)(progressBar.getProgress()/(float)progressBar.getMax()*100)+"%"+ "第二进度条值："+(int)(progressBar.getSecondaryProgress()/(float)progressBar.getMax()*100)+"%");


            }
        });

        button_reset.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                progressBar.setProgress(20);
                progressBar.setSecondaryProgress(30);
                textView.setText("第一进度条半分比："+(int)(progressBar.getProgress()/progressBar.getMax()*100)+"%"+ "第二进度条值："+(int)(progressBar.getSecondaryProgress()/progressBar.getMax()*100)+"%");

            }
        });


    }
}