安卓中在代码中设置dialog的样式

public void onClick(View v) {
final EditText inputServer = new EditText(ActivityAccoutManage.this);
inputServer.setSelectAllOnFocus(true);
AlertDialog.Builder builder = new AlertDialog.Builder(Activity.this);
builder.setTitle("设置标题")

.setView(inputServer)
.setNegativeButton("取消", null)
.setPositiveButton("确定", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {
Toast.makeText(Activity.this, "确定", Toast.LENGTH_LONG).show();
}
});
builder.show();
}