How to use Studio to implement Progress Bar in Android

This article mainly introduces how to use Studio to achieve progress bar in Android, the article is very detailed, has a certain reference value, interested friends must read it!

XML code

Java code

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 */ @Override public 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;// } //Get a random number to currentProgress and display it currentProgress = random.nextInt(100); mHandler.sendEmptyMessage(0); } } catch (InterruptedException e){ e.printStackTrace(); } } } }.start(); }}

Thread in the for loop can be removed, loop is the test timing lengthened progress bar design.

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