Android（X）控件-进度条

package com.example.processbar;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ProgressBar;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private Handler handler;//定义一个Handler对象
    private ProgressBar progressBar;//定义一个进度条对象
    private int mprogress;//记录当前进度

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);//设置全局显示
        progressBar=findViewById(R.id.processBar);//创建进度条对象引用
           
        handler = new Handler(){//创建handler匿名内部类
            @Override
            public void handleMessage(@NonNull Message msg) {
                if(msg.what==0x111){//接受判断消息码
                    progressBar.setProgress(mprogress);
                }else {
                    Toast.makeText(MainActivity.this, "goes ok", Toast.LENGTH_SHORT).show();//弹出框
                    progressBar.setVisibility(View.GONE);//设置不可见
                }
                //super.handleMessage(msg);
            }
        };
        
        new Thread(new Runnable() {//线程匿名内部类
            @Override
            public void run() {//创建run方法
                while(true){//死循环
                    mprogress=doWork();//获取当前进度值
                    Message m = new Message();//实例化message对象
                    if(mprogress<100){//当进度条没有满的时候
                        m.what=0x111;//消息码
                        handler.sendMessage(m);//发送消息码
                    }else{
                        m.what=0x110;//消息码
                        handler.sendMessage(m);//发送消息码
                        break;//结束循环，跳出run方法
                    }
                }
            }

            private int  doWork(){//doWork方法，每隔200ms增加一次进度，返回进度值
                mprogress+=Math.random()*10;
                try {
                    Thread.sleep(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                return mprogress;
            }
        }).start();
    }
}