简单的进度条实现

package com.dream.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.Spinner;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity  implements View.OnClickListener{
    private ProgressBar progress;
    private Button add;
    private Button sub;
    private Button reset;
    private TextView textView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //加载开始场景
        super.onCreate(savedInstanceState);
        //启用窗口特征
         requestWindowFeature(Window.FEATURE_PROGRESS);
         requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        //加载布局
        setContentView(R.layout.activity_main);
        //显示两种进度条
        setProgressBarVisibility(true);
        setProgressBarIndeterminateVisibility(true);
        setProgress(888);
        init();
    }
    private void init() {
        progress=(ProgressBar)findViewById(R.id.progressBar_horiz);
        add = (Button)findViewById(R.id.add);
        sub = (Button)findViewById(R.id.sub);
        reset = (Button)findViewById(R.id.reset);
        textView = (TextView)findViewById(R.id.text_view);
        int first = progress.getProgress();
        int second = progress.getSecondaryProgress();
        int max = progress.getMax();
        textView.setText(getString(R.string.first_text) + (int) (first / (float) max * 100) + getString(R.string.second_text) + (int) (second / (float) max * 100) + getString(R.string.three_text));
        add.setOnClickListener(this);
        sub.setOnClickListener(this);
        reset.setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.add: {
                progress.incrementProgressBy(10);
                progress.incrementSecondaryProgressBy(10);
                break;
            }
            case R.id.sub: {
                progress.incrementProgressBy(-10);
                progress.incrementSecondaryProgressBy(-10);
                break;
            }case R.id.reset: {
                progress.setProgress(30);
                progress.setSecondaryProgress(50);
                break;
            }
        }
        textView.setText(getString(R.string.first_text) + (int) (progress.getProgress() /
                (float) progress.getMax() * 100)                + getString(R.string.second_text)
                + (int) (progress.getSecondaryProgress() / (float) progress.getMax() * 100)
                +getString(R.string.three_text));
    }
}