Android 进度条对话框ProgressDialog

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
 
    <Button
        android:id="@+id/progress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="条形进度条" />
 
    <Button
        android:id="@+id/circle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="圆形进度条" />
 
</LinearLayout>

package com.example.yanlei.my;
 
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TimePicker;
 
public class MainActivity extends AppCompatActivity {
 
    //声明按钮
    private Button btnCircle=null;
    private Button btnProgress=null;
    //声明进度条对话框
    private ProgressDialog pdDialog=null;
    //进度计数
    int iCount  = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnCircle = (Button)findViewById(R.id.circle);
        btnProgress = (Button)findViewById(R.id.progress);
 
        //设置btnCircle的事件监听
        btnCircle.setOnClickListener(new Button.OnClickListener() {
 
            @Override
            public void onClick(View v){
 
                iCount  = 0;
                //创建ProgressDialog对象
                pdDialog = new ProgressDialog(MainActivity.this);
 
                //设置进度条风格，风格为圆形，旋转的
                pdDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
 
                // 设置ProgressDialog 标题
                pdDialog.setTitle("圆形进度条");
 
                // 设置ProgressDialog 提示信息
                pdDialog.setMessage("正在下载中……");
 
                // 设置ProgressDialog 标题图标
                pdDialog.setIcon(R.drawable.ic_launcher);
 
                // 设置ProgressDialog 进度条进度
                pdDialog.setProgress(100);
 
                // 设置ProgressDialog 的进度条是否不明确
                pdDialog.setIndeterminate(false);
 
                // 设置ProgressDialog 是否可以按退回按键取消
                pdDialog.setCancelable(true);
 
                // 设置ProgressDialog 的一个Button
                pdDialog.setButton("取消", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int i)
                    {
                        //点击“取消”按钮取消对话框
                        dialog.cancel();
                    }
                });
 
                // 让ProgressDialog显示
                pdDialog.show();
 
                //创建线程实例
                new Thread(){
                    public void run(){
                        try{
                            while (iCount  <= 100) {
                                // 由线程来控制进度。
                                pdDialog.setProgress(iCount ++);
                                Thread.sleep(50);
                            }
                            pdDialog.cancel();
                        }
                        catch (InterruptedException e){
                            pdDialog.cancel();
                        }
                    }
 
                }.start();
            }
 
        });
 
        //设置btnProgress的事件监听
        btnProgress.setOnClickListener(new Button.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                iCount  = 0;
                // 创建ProgressDialog对象
                pdDialog = new ProgressDialog(MainActivity.this);
 
                // 设置进度条风格，风格为长形
                pdDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
 
                // 设置ProgressDialog 标题
                pdDialog.setTitle("条形进度条");
 
                // 设置ProgressDialog 提示信息
                pdDialog.setMessage("正在下载中……");
 
                // 设置ProgressDialog 标题图标
                pdDialog.setIcon(R.drawable.ic_launcher);
 
                // 设置ProgressDialog 进度条进度
                pdDialog.setProgress(100);
 
                // 设置ProgressDialog 的进度条是否不明确
                pdDialog.setIndeterminate(false);
 
                // 设置ProgressDialog 是否可以按退回按键取消
                pdDialog.setCancelable(true);
 
                // 让ProgressDialog显示
                pdDialog.show();
 
                //创建线程实例
                new Thread(){
                    public void run(){
                        try{
                            while (iCount  <= 100) {
                                // 由线程来控制进度。
                                pdDialog.setProgress(iCount ++);
                                Thread.sleep(50);
                            }
                            pdDialog.cancel();
                        }
                        catch (InterruptedException e){
                            pdDialog.cancel();
                        }
                    }
 
                }.start();
            }
        });
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }
 
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
 
        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }
 
        return super.onOptionsItemSelected(item);
    }
}