Andoid doem进度条

Android 进度条

    **Android  前端代码**
<?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:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">


    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="60dp">

        <TextView
            android:id="@+id/tv_main_tv1"
            android:layout_width="60dp"
            android:layout_height="match_parent" />

        <ProgressBar
            android:id="@+id/pb_main_pb1"
            android:layout_width="match_parent"
            style="?android:attr/progressBarStyleHorizontal"
            android:max="100"
            android:progress="10"//从几开始
            android:layout_height="70dp" />

    </FrameLayout>

    <Button
        android:layout_width="100dp"
        android:id="@+id/main_bnt_bnt"
        android:onClick="setProgress"
        android:layout_height="100dp"
        android:text="bbbb"/>


</LinearLayout>

**Android 后台代码**
package com.example.t212_a05;

import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private ProgressBar pb_main_pb1;
    private int progress;
    private TextView tv_main_tv1;
    private Myhandler myHandler = new Myhandler();
    private int code = 1;
    private class Myhandler extends Handler{
        public void handleMessage(Message msg){
            super.handleMessage(msg);
            if(code == msg.what){
                progress++;
                pb_main_pb1.setProgress(progress);
                tv_main_tv1.setText(progress+"%");
            }
        }

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        pb_main_pb1 = this.findViewById(R.id.pb_main_pb1);
        tv_main_tv1 = this.findViewById(R.id.tv_main_tv1);
    }

   public void studyToast(View view){
        Toast.makeText(this, "Holle", Toast.LENGTH_LONG).show();
    }

    public void setProgress(View view){
        if(0 == progress){
            new MyThread().start();//开始线程
        }
    }

    private class MyThread extends Thread{
        @Override
        public void run(){
            super.run();
            while(true){
                SystemClock.sleep(100);
                if(progress == 100){
                    progress = 0;
                    break;
                }
                Message msg = new Message();
                msg.what = 1;
                myHandler.sendMessage(msg);
            }

        }

    }

}

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