Android Studio实现进度条效果

本文实例为大家分享了Android Studio实现进度条效果的具体代码，供大家参考，具体内容如下

实验作业 要求一个进度条，进度随机

效果图

xml代码

<?xml version='1.0' encoding='utf-8'?><RelativeLayout 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' android:orientation='vertical' tools:context='.ProgressBarActivity'> <ProgressBarandroid: android:layout_width='match_parent'android:layout_height='wrap_content' android:backgroundTint='@color/purple_200'android:progress='25'android:max='100'android:layout_centerVertical='true'/> <TextViewandroid:layout_width='match_parent'android:layout_height='wrap_content'android:text='ProgressBar'android:textSize='28sp'android:gravity='center'android:layout_below='@+id/pb_determinate'/></RelativeLayout>

java代码

package com.example.a18101352;import androidx.annotation.NonNull;import androidx.appcompat.app.AppCompatActivity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.widget.ProgressBar;import java.util.Random;public class MainActivity extends AppCompatActivity { private ProgressBar progressBar; private int maxProgress; private int currentProgress = 0; private Handler mHandler = new Handler(){/** * Subclasses must implement this to receive messages. * * @param msg */@Overridepublic void handleMessage(@NonNull Message msg) { super.handleMessage(msg); switch (msg.what){case 0: progressBar.setProgress(currentProgress); break; }} }; @Override protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_progress_bar);progressBar = findViewById(R.id.pb_determinate);maxProgress = progressBar.getMax(); } @Override protected void onStart(){super.onStart();new Thread() { private Random random; @Override public void run(){while(true){ try {for(int i = 0; i < maxProgress; ++i){ //间隔一秒 Thread.sleep(1000); random = new Random();// currentProgress += 10;// if(currentProgress > maxProgress){//break;// } //获取一个随机数给到currentProgress然后显示出来 currentProgress = random.nextInt(100); mHandler.sendEmptyMessage(0);} } catch (InterruptedException e){e.printStackTrace(); }} }}.start(); }}

线程里的for循环可以去掉，循环是测试定时加长进度条设计的。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持好吧啦网。