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));    }}