public void myClick(View view) {  // 單選對話框  //singleCheckDialog();  // 多選對話框  mulCheckDialog(); } private void mulCheckDialog() {  AlertDialog.Builder builder = new AlertDialog.Builder(this);  builder.setTitle("標題")    .setMultiChoiceItems(items, checkedItems, new DialogInterface.OnMultiChoiceClickListener() {     @Override     public void onClick(DialogInterface dialog, int which, boolean isChecked) {     }    })    .setPositiveButton("確定", new DialogInterface.OnClickListener() {     @Override     public void onClick(DialogInterface dialog, int which) {      StringBuilder reuslt = new StringBuilder();      for (int i = 0; i < items.length; i++) {       if (checkedItems[i]) {        reuslt.append(items[i]).append(" ");       }      }      Toast.makeText(MainActivity.this, "選擇了" + reuslt.toString(), Toast.LENGTH_SHORT).show();     }    })    .setNegativeButton("取消", new DialogInterface.OnClickListener() {     @Override     public void onClick(DialogInterface dialog, int which) {     }    }).show(); } private void singleCheckDialog() {  AlertDialog.Builder builder = new AlertDialog.Builder(this);  builder.setTitle("標題")    .setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() {     @Override     public void onClick(DialogInterface dialog, int which) {      String itemStr = items[which];      Toast.makeText(MainActivity.this, "選擇了" + itemStr, Toast.LENGTH_SHORT).show();      // 關閉對話框      //dialog.dismiss();     }    })    .setPositiveButton("確定", new DialogInterface.OnClickListener() {     @Override     public void onClick(DialogInterface dialog, int which) {     }    })    .setNegativeButton("取消", new DialogInterface.OnClickListener() {     @Override     public void onClick(DialogInterface dialog, int which) {     }    }).show(); }