progressBar

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、、进度条控件：通常向用户显示某个耗时操作完成的百分比。

布局文件：通过添加两个“增加”和“减小”的按钮来控制进度条的增减。

<?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:orientation="vertical"
    android:layout_height="match_parent"
    tools:context="com.example.administrator.myapplication.MainActivity">

    <SeekBar
        android:id="@+id/seekBar2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:max="800"
        android:thumb="@mipmap/ic_launcher"/>

    <TextView
        android:id="@+id/tv_text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="0"
        android:layout_gravity="center_horizontal"
        />

    <android.support.v4.widget.ContentLoadingProgressBar
        android:id="@+id/progress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="?android:attr/progressBarStyleHorizontal"
        android:max="180"
        android:progress="50"
        />
    <Button
        android:id="@+id/add"
        android:layout_width="match_parent"
        android:layout_height="match_parent" 
        android:text="增加"/>
    <Button
        android:id="@+id/dect"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:text="减小"/>

</LinearLayout>

、、activity设置：

package com.example.administrator.myapplication;

import android.support.annotation.IdRes;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.SeekBar;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    SeekBar myseekBar;
    TextView seekBarView;
    ProgressBar progressBar;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        seekBarView=(TextView)findViewById(R.id.tv_text_view);
        myseekBar=(SeekBar)findViewById(R.id.seekBar2);
        myseekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                seekBarView.setText(String.valueOf(progress));
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }

        });
         progressBar=(ProgressBar)  findViewById(R.id.progress);
        findViewById(R.id.add).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                progressBar.setProgress(progressBar.getProgress()+1);
            }
        });
        findViewById(R.id.dect).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                progressBar.setProgress(progressBar.getProgress()-1);
            }
        });

    }
}
、、效果图