列表对话框无法显示

Question

RT,确认和取消按钮可以出来
但是列表出不来代码如下
button2.setOnClickListener(new View.OnClickListener() { @Override
public void onClick(View v) {
Builder builder = new Builder(MainActivity.this); builder.setIcon(R.drawable.ic_launcher);
builder.setTitle("a title");
builder.setMessage("items");
builder.setPositiveButton("OK",
new DialogInterface.OnClickListener() { @Override
public void onClick(DialogInterface dialog,
int which) {
Toast.makeText(MainActivity.this, "OK clicked",
Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() { @Override
public void onClick(DialogInterface dialog,
int which) {
Toast.makeText(MainActivity.this,
"Cancel clicked", Toast.LENGTH_SHORT)
.show();
}
});
builder.setItems(new String[] { "red", "green", "blue" },
new DialogInterface.OnClickListener() { @Override
public void onClick(DialogInterface dialog,
int which) {
Toast.makeText(MainActivity.this,
"witch = " + which + " clicked",
Toast.LENGTH_SHORT).show(); }
}); builder.show();
}
});不知道有什么问题?对话框

Answer 1

setMessage和setItems只能选一个呀！都是设置它显示的内容