AlertDialog（对话框）的基础详解

1、确定取消对话框

AlertDialog不可创建对象，要用AlertDialog.Builder builder = new Builder(conext);

AlertDialog.Builder builder = new Builder(this);  //创建对象
  builder.setIcon(android.R.drawable.alert_light_frame  );  //设置头像，这里是系统里面的
  builder.setTitle("你屌不屌？"); //设置标题
  builder.setMessage("叼叼叼！");  //设置内容
  builder.setCancelable(false);  //不能点返回
  builder.setPositiveButton("是的", new OnClickListener(){    
   @Override    //设置确定按钮 ，注意导包import android.content.DialogInterface.OnClickListener;
   public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(MainActivity.this, "叼叼叼", Toast.LENGTH_SHORT).show();
   }
  });
  builder.setNegativeButton("否的", new OnClickListener() {
   @Override    //设置取消按钮
   public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(MainActivity.this, "搓搓搓", Toast.LENGTH_SHORT).show();
   }
  });
  AlertDialog aler = builder.create();
  aler.show();  //show（）

Android4.0以上AlertDialog在触摸对话框边缘外部，对话框消失
可以设置这么一条属性，当然必须先AlertDialog.Builder.create()之后才能调用这两个方法
方法一：
setCanceledOnTouchOutside(false);调用这个方法时，按对话框以外的地方不起作用。按返回键还起作用
方法二：
setCanceleable(false); 调用这个方法时，按对话框以外的地方不起作用。按返回键也不起作用

2、单选对话框

AlertDialog.Builder builder = new Builder(this);
  builder.setTitle("你屌不屌？");
  final String[] items = new String[]{"男","女"};
  builder.setSingleChoiceItems(items, 0/*这里是默认被选中的，不选为-1，第一个为0*/, new OnClickListener(){
   @Override    //which用户所选的下标
   public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(MainActivity.this, "你选中："+items[which], 0).show();
    dialog.dismiss();//关闭对话框
   }
  });
  builder.create().show();
 
     
 
    

3.多选对话框

 AlertDialog.Builder builder = new Builder(this);
  builder.setTitle("你屌不屌？");
  final String[] items = new String[]{"男","女","妖","魔","鬼"};
  final boolean[] b = new boolean[]{false,false,false,false,false};  //如果是true就是默认选中
  builder.setMultiChoiceItems(items, b, new OnMultiChoiceClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which, boolean isChecked) {
    b[which] = isChecked;  //记录你的选择
   }
  });
  builder.setPositiveButton("确定", new OnClickListener() {
   @Override   //设置确定按钮
   public void onClick(DialogInterface dialog, int which) {
    String text = "";
    for(int i=0;i

4、自定义对话框（资源在java函数中，用适配器）

1）layout里面布局xml文件：   R.layout.item_dailog

2）代码:

final String[] str1 = new String[] { "吊", "不屌", "吊炸天", "有点吊", "66666" };
final int[] icon = new int[] { R.drawable.qb_20, R.drawable.qb_21, R.drawable.qb_22, R.drawable.qb_24, R.drawable.qb_25 };

List> list = new ArrayList>();
for (int i = 0; i < str1.length; i++) {
    Map map = new HashMap();
    map.put("name", str1[i]);
    map.put("image", icon[i]);
    list.add(map);
 }

 SimpleAdapter adp = new SimpleAdapter(MainActivity.this, list, R.layout.item_dailog, new String[] { "name", "image" }, new int[] { R.id.tv_item, R.id.iv_item }); 

   builder.setAdapter(adp, new OnClickListener() {

    @Override
    public void onClick(DialogInterface dialog, int which) {
     Toast.makeText(MainActivity.this, "点击了：" + str1[which], Toast.LENGTH_SHORT).show(); 
     dialog.dismiss();
    }
   });
   builder.create().show();

5、自定义对话框（资源来自对话框输入，用布局）

1）layout里面布局xml文件：R.layout.item02_dailong

2）代码：

//泵布局，得到组件
View diog = getLayoutInflater().inflate(R.layout.item02_dailong,null);
   final EditText name = (EditText) diog.findViewById(R.id.editText1);
   final EditText pass = (EditText) diog.findViewById(R.id.editText2);
 //setview
   builder.setView(diog);
//监听，这里设置一个确定键来监听
   builder.setPositiveButton("确定", new OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
     String usrName = name.getText().toString();
     String usrPass = pass.getText().toString();
     if (usrName.equals("abc") && usrPass.equals("123")) {
      Toast.makeText(MainActivity.this, "登录成东",Toast.LENGTH_SHORT).show();
     }
    }
   });
//创建并show出来
   builder.create().show();

6、DatePickerDialog（时间对话框）

 //获取当前时间，作为DatePickerDialog的参数
Calendar calendar = Calendar.getInstance();
   int year = calendar.get(Calendar.YEAR);
   int monthOfYear = calendar.get(Calendar.MONTH);
   int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);
//new DatePickerDialog
   DatePickerDialog dpd = new DatePickerDialog(MainActivity.this,
     new OnDateSetListener() {

      @Override
      public void onDateSet(DatePicker view, int year,int monthOfYear, int dayOfMonth) {
       Toast.makeText(MainActivity.this,year + "-" + monthOfYear + "-" + dayOfMonth,Toast.LENGTH_SHORT).show();
      }
     }, year, monthOfYear, dayOfMonth);
//show
   dpd.show();