Android 自定义dialog 设置宽度

public static void showErrorCustomDialog(Activity activity, String title, String msg, String positivie, String result) {
CustomErrorDialog.Builder builder = new CustomErrorDialog.Builder(activity);
builder.setMessageType(0);
builder.setMessage(msg);
builder.setResult(result);
builder.setTitle(title);

builder.setPositiveButton(positivie, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
// 设置你的操作事项
}
});
//builder.create().show();
Dialog dialog = builder.create();

dialog.show();
//设置大小
DisplayMetrics dm = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
dialog.getWindow().setLayout(dm.widthPixels, dialog.getWindow().getAttributes().height);

}