📜  Android-Progress Circle

📅  最后修改于: 2021-01-05 05:27:01             🧑  作者: Mango


进行进度圈的最简单方法是使用名为ProgressDialog的类。加载栏也可以通过该类制作。条形和圆形之间唯一的逻辑区别是,当您知道等待特定任务的总时间时使用前者,而当您不知道等待时间时使用后者。

为此,您需要实例化此类的对象。它的语法是。

ProgressDialog progress = new ProgressDialog(this);

现在,您可以设置此对话框的某些属性。例如,其样式,其文字等

progress.setMessage("Downloading Music :) ");
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.setIndeterminate(true);

除了这些方法外,ProgressDialog类还提供其他方法。

Sr.No Classes & Description
1

getMax()

This methods returns the maximum value of the progress

2

incrementProgressBy(int diff)

This method increment the progress bar by the difference of value passed as a parameter

3

setIndeterminate(boolean indeterminate)

This method set the progress indicator as determinate or indeterminate

4

setMax(int max)

This method set the maximum value of the progress dialog

5

setProgress(int value)

This method is used to update the progress dialog with some specific value

6

show(Context context, CharSequence title, CharSequence message)

This is a static method, used to display progress dialog

本示例演示了进度对话框的旋转用法。按下按钮时将显示旋转进度对话框。

要试验该示例,您需要在按照以下步骤开发应用程序后,在实际设备上运行该示例。

Steps Description
1 You will use Android Studio to create an Android application under a package com.example.sairamkrishna.myapplication.
2 Modify src/MainActivity.java file to add progress code to display the spinning progress dialog.
3 Modify res/layout/activity_main.xml file to add respective XML code.
4 Run the application and choose a running android device and install the application on it and verify the results.

以下是修改后的主要活动文件src / MainActivity.java的内容。

package com.example.sairamkrishna.myapplication;

import android.app.ProgressDialog;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
   Button b1;
   private  ProgressDialog progressBar;
   private int progressBarStatus = 0;
   private Handler progressBarbHandler = new Handler();
   private long fileSize = 0;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      b1=(Button)findViewById(R.id.button);

      b1.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            progressBar = new ProgressDialog(v.getContext());
            progressBar.setCancelable(true);
            progressBar.setMessage("File downloading ...");
            progressBar.setProgressStyle(ProgressDialog.STYLE_SPINNER);
            progressBar.setProgress(0);
            progressBar.setMax(100);
            progressBar.show();
            progressBarStatus = 0;

            fileSize = 0;
            new Thread(new Runnable() {
               public void run() {
                  while (progressBarStatus < 100) {
                     progressBarStatus = downloadFile();

                     try {
                        Thread.sleep(1000);
                     } catch (InterruptedException e) {
                        e.printStackTrace();
                     }

                     progressBarbHandler.post(new Runnable() {
                        public void run() {
                           progressBar.setProgress(progressBarStatus);
                        }
                     });
                  }

                  if (progressBarStatus >= 100) {
                     try {
                        Thread.sleep(2000);
                     } catch (InterruptedException e) {
                        e.printStackTrace();
                     }
                     progressBar.dismiss();
                  }
               }
            }).start();
         }
      });
   }
    
   public int downloadFile() {
      while (fileSize <= 1000000) {
         fileSize++;

         if (fileSize == 100000) {
            return 10;
         }else if (fileSize == 200000) {
            return 20;
         }else if (fileSize == 300000) {
            return 30;
         }else if (fileSize == 400000) {
            return 40;
         }else if (fileSize == 500000) {
            return 50;
         }else if (fileSize == 700000) {
            return 70;
         }else if (fileSize == 800000) {
            return 80;
         }
      }
      return 100;
   }
}

res / layout / activity_main.xml的内容修改为以下内容

在下面的代码中, abc指示tutorialspoint.com的徽标



   
   
      
   
      
   
      
   
      

res / values /字符串.xml修改为以下内容


   My Application

这是默认的AndroidManifest.xml




   
      
      
         
         
            
            
         
      
      
   

让我们尝试运行您的应用程序。要从android studio运行该应用,请打开您项目的活动文件之一,然后点击运行Eclipse运行图标工具栏中的图标。在启动应用程序之前,Android Studio将显示以下窗口,以选择要在其中运行Android应用程序的选项。

Android进度对话框教程

只需按下按钮即可启动“进度对话框”。按之后,将出现以下屏幕。

Android进度对话框教程