android实现动态显隐进度条

ProgressUtil.startProgress(this, new ProgressUtil.ICallback() {
                @Override
                public void progress(int count) {
                    LogUtil.d(count + "%");
                }
            }); 

package com.coral3.common_module.utils;

import android.app.Activity;
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.coral3.common_module.R;
import java.sql.Time;
import java.util.Timer;
import java.util.TimerTask;

public class ProgressUtil {

    private static View progressContainer;
    private static TextView tvView;
    private static ProgressBar progressView;
    private static ViewGroup contentView;
    private static Timer timer = new Timer();
    private static TimerTask task;
    private static int count = 0;
    private static ICallback myICallback;
    private static Handler handler = new Handler(new Handler.Callback(){

        @Override
        public boolean handleMessage(Message msg) {
            if(msg.what == 0x1){
                count++;
                progressView.setProgress(count);
                tvView.setText(count + "%");
                myICallback.progress(count);
            }
            return false;
        }
    });

    public static void startProgress(Context context, ICallback iCallback){
        if(null == contentView) contentView = ((Activity)context).findViewById(android.R.id.content);
        if (progressContainer == null) {
            progressContainer = LayoutInflater.from(context).inflate(R.layout.view_progress, null, false);
            progressView = progressContainer.findViewById(R.id.pb_common);
            tvView = progressContainer.findViewById(R.id.tv_progress);
            contentView.addView(progressContainer);
        } else {
            progressContainer.setVisibility(View.VISIBLE);
        }
        myICallback = iCallback;
        task = new TimerTask() {
            @Override
            public void run() {

                if(count > 99){
                    hideProgressInUiThread((Activity) context);
                }else{
                    handler.sendEmptyMessage(0x1);
                }
            }
        };
        if(timer == null) timer = new Timer();
        timer.schedule(task, 10, 1000/60);
    }

    public static void endTimer(){
        timer.cancel();
        task.cancel();
        task = null;
        timer = null;
        count = 0;
    }

    public static void hideProgress(){
        if (progressContainer != null) {
            endTimer();
            progressContainer.setVisibility(View.GONE);
        }
    }

    public static void startProgressInUiThread(Context context, ICallback iCallback){
        ((Activity)context).runOnUiThread(new Runnable() {
            @Override
            public void run() {
                startProgress(context, iCallback);
            }
        });
    }

    public static void hideProgressInUiThread(Activity activity){
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                hideProgress();
            }
        });
    }

    public interface ICallback{
        void progress(int count);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
        <LinearLayout
            android:layout_width="match_parent"
            android:orientation="vertical"
            android:gravity="center"
            android:padding="8dp"
            android:layout_height="match_parent">
            <ProgressBar android:id="@+id/pb_common"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:progress="10"
                style="@style/Widget.AppCompat.ProgressBar.Horizontal"></ProgressBar>
            <TextView
                android:id="@+id/tv_progress"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="0%"/>
        </LinearLayout>

</RelativeLayout>