1 public class MainActivity extends AppCompatActivity implements View.OnClickListener {
  2 
  3     private Button btn_dialog_one;
  4     private Button btn_dialog_three;
  5     private Button btn_dialog_four;
  6 
  7     private Context mContext;
  8     private boolean[] checkItems;
  9 
 10     private AlertDialog alert = null;
 11     private AlertDialog.Builder builder = null;
 12 
 13     @Override
 14     protected void onCreate(Bundle savedInstanceState) {
 15         super.onCreate(savedInstanceState);
 16         setContentView(R.layout.activity_main);
 17         mContext = MainActivity.this;
 18         bindView();
 19 
 20 
 21     }
 22 
 23     private void bindView() {
 24         btn_dialog_one = (Button) findViewById(R.id.btn_dialog_one);
 25         btn_dialog_three = (Button) findViewById(R.id.btn_dialog_three);
 26         btn_dialog_four = (Button) findViewById(R.id.btn_dialog_four);
 27         btn_dialog_one.setOnClickListener(this);
 28         btn_dialog_three.setOnClickListener(this);
 29         btn_dialog_four.setOnClickListener(this);
 30     }
 31 
 32 
 33     @Override
 34     public void onClick(View v) {
 35         switch (v.getId()) {
 36             //普通对话框
 37             case R.id.btn_dialog_one:
 38                 alert = null;
 39                 builder = new AlertDialog.Builder(mContext);
 40                 alert = builder.setIcon(R.mipmap.ic_icon_fish)
 41                         .setTitle("系统提示：")
 42                         .setMessage("这是一个最普通的AlertDialog,\n带有三个按钮，分别是取消，中立和确定")
 43                         .setNegativeButton("取消", new DialogInterface.OnClickListener() {
 44                             @Override
 45                             public void onClick(DialogInterface dialog, int which) {
 46                                 Toast.makeText(mContext, "你点击了取消按钮~", Toast.LENGTH_SHORT).show();
 47                             }
 48                         })
 49                         .setPositiveButton("确定", new DialogInterface.OnClickListener() {
 50                             @Override
 51                             public void onClick(DialogInterface dialog, int which) {
 52                                 Toast.makeText(mContext, "你点击了确定按钮~", Toast.LENGTH_SHORT).show();
 53                             }
 54                         })
 55                         .setNeutralButton("中立", new DialogInterface.OnClickListener() {
 56                             @Override
 57                             public void onClick(DialogInterface dialog, int which) {
 58                                 Toast.makeText(mContext, "你点击了中立按钮~", Toast.LENGTH_SHORT).show();
 59                             }
 60                         }).create();             //创建AlertDialog对象
 61                 alert.show();                    //显示对话框
 62                 break;
 63             //单选列表对话框
 64             case R.id.btn_dialog_three:
 65                 final String[] fruits = new String[]{"苹果", "雪梨", "香蕉", "葡萄", "西瓜"};
 66                 alert = null;
 67                 builder = new AlertDialog.Builder(mContext);
 68                 alert = builder.setIcon(R.mipmap.ic_icon_fish)
 69                         .setTitle("选择你喜欢的水果，只能选一个哦~")
 70                         .setSingleChoiceItems(fruits, 0, new DialogInterface.OnClickListener() {
 71                             @Override
 72                             public void onClick(DialogInterface dialog, int which) {
 73                                 Toast.makeText(getApplicationContext(), "你选择了" + fruits[which], Toast.LENGTH_SHORT).show();
 74                             }
 75                         }).create();
 76                 alert.show();
 77                 break;
 78             //多选列表对话框
 79             case R.id.btn_dialog_four:
 80                 final String[] menu = new String[]{"水煮豆腐", "萝卜牛腩", "酱油鸡", "胡椒猪肚鸡"};
 81                 //定义一个用来记录个列表项状态的boolean数组
 82                 checkItems = new boolean[]{false, false, false, false};
 83                 alert = null;
 84                 builder = new AlertDialog.Builder(mContext);
 85                 alert = builder.setIcon(R.mipmap.ic_icon_fish)
 86                         .setMultiChoiceItems(menu, checkItems, new DialogInterface.OnMultiChoiceClickListener() {
 87                             @Override
 88                             public void onClick(DialogInterface dialog, int which, boolean isChecked) {
 89                                 checkItems[which] = isChecked;
 90                             }
 91                         })
 92                         .setPositiveButton("确定", new DialogInterface.OnClickListener() {
 93                             @Override
 94                             public void onClick(DialogInterface dialog, int which) {
 95                                 String result = "";
 96                                 for (int i = 0; i < checkItems.length; i++) {
 97                                     if (checkItems[i])
 98                                         result += menu[i] + " ";
 99                                 }
100                                 Toast.makeText(getApplicationContext(), "客官你点了:" + result, Toast.LENGTH_SHORT).show();
101                             }
102                         })
103                         .create();
104                 alert.show();
105                 break;
106         }
107     }
108 }