1.創(chuàng)建AlertDialog.Builder對象
2.對AlertDialog.Builder通過SetTitle來設(shè)置標(biāo)題,SetIcon來設(shè)置圖標(biāo)
3.調(diào)用AlertDialog.Builder相關(guān)方法來設(shè)置內(nèi)容
4.調(diào)用setPositiveButton或者setBegativeButton設(shè)置確定和取消按鈕,其中還一個裝飾性按鈕,就不介紹了
5.調(diào)用AlertDialog.Builder的create方法進(jìn)行創(chuàng)建,再調(diào)用AlertDialog的show方法即可顯示出來.

下面根據(jù)實(shí)例一起來看看具體用法

1、簡單文本對話框

定義一個Button為其添加點(diǎn)擊事件,從而啟動AlertDialog對話框,并添加監(jiān)聽事件

public void simpledialog1(View view){
  AlertDialog.Builder builder = new AlertDialog.Builder(this)
    //設(shè)置對話框標(biāo)題
    .setTitle("簡單文本對話框")
    //設(shè)置圖標(biāo)
    .setIcon(R.mipmap.ic_launcher)
    //設(shè)置為簡單文本對話框
    .setMessage("這是一個簡單文本對話框");
    //設(shè)置兩個按鈕
    builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
     @Override
     public void onClick(DialogInterface dialog, int which) {
      Toast.makeText(MainActivity.this,"你點(diǎn)擊了確認(rèn)",Toast.LENGTH_SHORT).show();
     }
    });
    builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
     @Override
     public void onClick(DialogInterface dialog, int which) {
      Toast.makeText(MainActivity.this, "你點(diǎn)擊了取消", Toast.LENGTH_SHORT).show();
     }
    });
    builder.create().show();

 }

2、列表項對話框

和上面的文本對話框不同,列表像是通過一個數(shù)組來顯示列表

public void simpledialog2(View view){
  //列表項需要傳入一個數(shù)組用于顯示列表
  final String items[] = {"java","php","android","ios"};
  AlertDialog.Builder builder = new AlertDialog.Builder(this)
    //設(shè)置對話框標(biāo)題
    .setTitle("簡單列表項對話框")
      //設(shè)置圖標(biāo)
    .setIcon(R.mipmap.ic_launcher)
      //設(shè)置為簡單列表項對話框
    .setItems(items, new DialogInterface.OnClickListener() {
     @Override
     public void onClick(DialogInterface dialog, int which) {
      Toast.makeText(MainActivity.this, "你點(diǎn)擊了" + items[which], Toast.LENGTH_SHORT).show();
     }
    });
  //設(shè)置兩個按鈕
  builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(MainActivity.this,"你點(diǎn)擊了確認(rèn)",Toast.LENGTH_SHORT).show();
   }
  });
  builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(MainActivity.this, "你點(diǎn)擊了取消", Toast.LENGTH_SHORT).show();
   }
  });
  builder.create().show();

 }

3、單選項對話框

和列表項差不多,但是功能足足強(qiáng)了好多,因為傳入的參數(shù)可以為數(shù)組,也可以是Cursor的查詢結(jié)果集,還可以使ListAdapter

public void simpledialog3(View view){
  //列表項需要傳入一個數(shù)組用于顯示列表
  final String items[] = {"java","php","android","ios"};
  AlertDialog.Builder builder = new AlertDialog.Builder(this)
    //設(shè)置對話框標(biāo)題
    .setTitle("簡單列表項對話框")
      //設(shè)置圖標(biāo)
    .setIcon(R.mipmap.ic_launcher)
      //設(shè)置為簡單單選列表項對話框,1表示默認(rèn)選擇第二個
    .setSingleChoiceItems(items, 1, new DialogInterface.OnClickListener() {
     @Override
     public void onClick(DialogInterface dialog, int which) {
      Toast.makeText(MainActivity.this, "你點(diǎn)擊了" + items[which], Toast.LENGTH_SHORT).show();
     }
    });
  //設(shè)置兩個按鈕
  builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(MainActivity.this,"你點(diǎn)擊了確認(rèn)",Toast.LENGTH_SHORT).show();
   }
  });
  builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(MainActivity.this, "你點(diǎn)擊了取消", Toast.LENGTH_SHORT).show();
   }
  });
  builder.create().show();

 }

4、多選項對話框

多選和單選差不多,就多了個Boolean的數(shù)組來控制初始選擇值

public void simpledialog4(View view){
  //列表項需要傳入一個數(shù)組用于顯示列表
  final String items[] = {"java","php","android","ios"};
  AlertDialog.Builder builder = new AlertDialog.Builder(this)
    //設(shè)置對話框標(biāo)題
    .setTitle("簡單列表項對話框")
      //設(shè)置圖標(biāo)
    .setIcon(R.mipmap.ic_launcher)
      //設(shè)置為簡單多選列表項對話框,boolean型變量表示初始選擇的位置
    .setMultiChoiceItems(items, new boolean[]{false, false, false, true}, null);
  //設(shè)置兩個按鈕
  builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(MainActivity.this,"你點(diǎn)擊了確認(rèn)",Toast.LENGTH_SHORT).show();
   }
  });
  builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(MainActivity.this, "你點(diǎn)擊了取消", Toast.LENGTH_SHORT).show();
   }
  });
  builder.create().show();

 }