详解Android中提示对话框（ProgressDialog和DatePickerDialog和TimePickerDialog&PopupWindow）

package com.example.test3;import android.app.Activity;import android.app.ProgressDialog;import android.content.Context;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.Button;public class MainActivity extends Activity implements View.OnClickListener{  private Button btn_one;  private Button btn_two;  private Button btn_three;  private ProgressDialog pd1 = null;  private ProgressDialog pd2 = null;  private final static int MAXVALUE = 100;  private int progressStart = 0;  private int add = 0;  private Context mContext = null;  //定义一个用于更新进度的Handler,因为只能由主线程更新界面,所以要用Handler传递信息  final Handler hand = new Handler()  {    @Override    public void handleMessage(Message msg) {      //这里的话如果接受到信息码是123      if(msg.what == 123)      {        //设置进度条的当前值        pd2.setProgress(progressStart);      }      //如果当前大于或等于进度条的最大值,调用dismiss()方法关闭对话框      if(progressStart >= MAXVALUE)      {        pd2.dismiss();      }    }  };  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    mContext = MainActivity.this;    bindViews();  }  private void bindViews() {    btn_one = (Button) findViewById(R.id.btn1);    btn_two = (Button) findViewById(R.id.btn2);    btn_three = (Button) findViewById(R.id.btn3);    btn_one.setOnClickListener(this);    btn_two.setOnClickListener(this);    btn_three.setOnClickListener(this);  }  @Override  public void onClick(View v) {    switch (v.getId()){      case R.id.btn1:        //这里的话参数依次为,上下文,标题,内容,是否显示进度,是否可以用取消按钮关闭        ProgressDialog.show(MainActivity.this, "资源加载中", "资源加载中,请稍后...",false,true);        break;      case R.id.btn2:        pd1 = new ProgressDialog(mContext);        //依次设置标题,内容,是否用取消按钮关闭,是否显示进度        pd1.setTitle("软件更新中");        pd1.setMessage("软件正在更新中,请稍后...");        pd1.setCancelable(true);        //这里是设置进度条的风格,HORIZONTAL是水平进度条,SPINNER是圆形进度条        pd1.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);        pd1.setIndeterminate(true);        //调用show()方法将ProgressDialog显示出来        pd1.show();        break;      case R.id.btn3:        //初始化属性        progressStart = 0;        add = 0;        //依次设置一些属性        pd2 = new ProgressDialog(MainActivity.this);        pd2.setMax(MAXVALUE);        pd2.setTitle("文件读取中");        pd2.setMessage("文件加载中,请稍后...");        //这里设置为不可以通过按取消按钮关闭进度条        pd2.setCancelable(false);        pd2.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);        //这里设置的是是否显示进度,设为false才是显示的哦！        pd2.setIndeterminate(false);        pd2.show();        //这里的话新建一个线程,重写run()方法,        new Thread()        {          public void run()          {            while(progressStart < MAXVALUE)            {              //这里的算法是决定进度条变化的,可以按需要写              progressStart = 2 * usetime() ;              //把信息码发送给handle让更新界面              hand.sendEmptyMessage(123);            }          }        }.start();        break;    }  }  //这里设置一个耗时的方法:  private int usetime() {    add++;    try{      Thread.sleep(100);    }catch (InterruptedException e) {      e.printStackTrace();    }    return add;  }}

public class MainActivity extends AppCompatActivity implements View.OnClickListener{  private Button btn_date;  private Button btn_time;  private String result = "";  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    bindViews();  }  private void bindViews() {    btn_date = (Button) findViewById(R.id.btn_date);    btn_time = (Button) findViewById(R.id.btn_time);    btn_date.setOnClickListener(this);    btn_time.setOnClickListener(this);  }  @Override  public void onClick(View v) {    result = "";    switch (v.getId()){      case R.id.btn_date:        Calendar cale1 = Calendar.getInstance();        new DatePickerDialog(MainActivity.this,new DatePickerDialog.OnDateSetListener() {          @Override          public void onDateSet(DatePicker view, int year, int monthOfYear,                     int dayOfMonth) {            //这里获取到的月份需要加上1哦~            result += "你选择的是"+year+"年"+(monthOfYear+1)+"月"+dayOfMonth+"日";            Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();          }        }            ,cale1.get(Calendar.YEAR)            ,cale1.get(Calendar.MONTH)            ,cale1.get(Calendar.DAY_OF_MONTH)).show();        break;      case R.id.btn_time:        Calendar cale2 = Calendar.getInstance();        new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {          @Override          public void onTimeSet(TimePicker view, int hourOfDay, int minute) {            result = "";            result += "您选择的时间是:"+hourOfDay+"时"+minute+"分";            Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();          }        }, cale2.get(Calendar.HOUR_OF_DAY), cale2.get(Calendar.MINUTE), true).show();        break;    }  }}

public PopupWindow (Context context)public PopupWindow(View contentView, int width, int height)public PopupWindow(View contentView)public PopupWindow(View contentView, int width, int height, boolean focusable)

public class MainActivity extends Activity {  private Button btn_show;  private Context mContext;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    mContext = MainActivity.this;    btn_show = (Button) findViewById(R.id.btn_show);    btn_show.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        initPopWindow(v);      }    });  }  private void initPopWindow(View v) {    View view = LayoutInflater.from(mContext).inflate(R.layout.item_popup, null, false);    Button btn_xixi = (Button) view.findViewById(R.id.btn_xixi);    Button btn_hehe = (Button) view.findViewById(R.id.btn_hehe);    //1.构造一个PopupWindow，参数依次是加载的View，宽高    final PopupWindow popWindow = new PopupWindow(view,        ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);    popWindow.setAnimationStyle(R.anim.anim_pop); //设置加载动画    //这些为了点击非PopupWindow区域，PopupWindow会消失的，如果没有下面的    //代码的话，你会发现，当你把PopupWindow显示出来了，无论你按多少次后退键    //PopupWindow并不会关闭，而且退不出程序，加上下述代码可以解决这个问题    popWindow.setTouchable(true);    popWindow.setTouchInterceptor(new View.OnTouchListener() {      @Override      public boolean onTouch(View v, MotionEvent event) {        return false;        // 这里如果返回true的话，touch事件将被拦截        // 拦截后 PopupWindow的onTouchEvent不被调用，这样点击外部区域无法dismiss      }    });    popWindow.setBackgroundDrawable(new ColorDrawable(0x00000000));  //要为popWindow设置一个背景才有效    //设置popupWindow显示的位置，参数依次是参照View，x轴的偏移量，y轴的偏移量    popWindow.showAsDropDown(v, 50, 0);    //设置popupWindow里的按钮的事件    btn_xixi.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        Toast.makeText(MainActivity.this, "你点击了嘻嘻~", Toast.LENGTH_SHORT).show();      }    });    btn_hehe.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        Toast.makeText(MainActivity.this, "你点击了呵呵~", Toast.LENGTH_SHORT).show();        popWindow.dismiss();      }    });  }}