首先单选布局有问题，其次点击上面的部分对话框消失弹出吐司，点击下方部分无反应

private void showSingleDialog() {
    //****************
    LayoutInflater factory= LayoutInflater.from(this);
    final View view=factory.inflate(R.layout.single_dialog,null);

    final String[] items = {"男","女","性别未知","你猜"};
    AlertDialog.Builder builder = new AlertDialog.Builder(this)
            .setTitle("")
            .setSingleChoiceItems(items,0,new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    Toast.makeText(MainActivity.this,"您选择了："+items[which],Toast.LENGTH_SHORT).show();
                    dialog.dismiss();
                }
            });
    builder.setView(view);
    builder.show();
}

//布局代码
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal">

        <ImageView
            android:layout_width="40dp"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:src="@mipmap/ic_launcher" />

        <TextView
            android:id="@+id/text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:paddingLeft="30dp"
            android:text="请选择一下性别吧"
            android:textSize="25sp" />
    </LinearLayout>

    <RadioGroup
        android:id="@+id/rg_gender"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <RadioButton
            android:id="@+id/rb_male"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="男"
            android:textSize="20sp"
            android:layout_margin="10dp"/>
        <RadioButton
            android:id="@+id/rb_female"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女"
            android:textSize="20sp"
            android:layout_margin="10dp"/>
        <RadioButton
            android:id="@+id/rb_unknown"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="性别未知"
            android:textSize="20sp"
            android:layout_margin="10dp"/>
        <RadioButton
            android:id="@+id/rb_guess"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="你猜"
            android:textSize="20sp"
            android:layout_margin="10dp"/>
    </RadioGroup>

</LinearLayout>