如何自定义警报对话框，以使按钮适合警报对话框

我正在使用以下代码段创建Alertdialog。

AlertDialog.Builder builder = new AlertDialog.Builder(new ContextThemeWrapper(this, android.R.style.Theme_Holo_Light));
    View pickerView = getLayoutInflater().inflate(R.layout.picker_dialog, null);
    builder.setView(pickerView);
    builder.setMessage("AlertDialog").setCancelable(false).setPositiveButton("OK", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(getApplicationContext(), "got it!", Toast.LENGTH_SHORT).show();
        }
    }).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    }).setNeutralButton("Neutral", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(getApplicationContext(), "neutralize", Toast.LENGTH_SHORT).show();
        }
    });

    AlertDialog alert = builder.create();
    alert.setTitle("number picker");
    alert.show();

问题是当我使用此代码创建对话框时，这三个按钮未均匀放置，如下所示：

实际上我想要得到的是这样的：

这两个按钮均放在同一位置

我知道这是Alertdialog主题的问题。但是我无尽的尝试我什么都不能改变。

有人可以告诉我如何处理主题以获得第二个警报对话框吗？

picker_dialog的布局文件如下：

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

<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="input"/>

</LinearLayout>

我遵循Android上的建议-使AlertDIalog按钮的大小均匀。代码如下：

AlertDialog.Builder builder = new AlertDialog.Builder(new ContextThemeWrapper(this, android.R.style.Theme_Dialog));
    View pickerView = getLayoutInflater().inflate(R.layout.picker_dialog, null);
    builder.setView(pickerView);
    builder.setMessage("AlertDialog").setCancelable(false).setPositiveButton("Verify", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(getApplicationContext(), "got it!", Toast.LENGTH_SHORT).show();
        }
    });
    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });
    builder.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(getApplicationContext(), "Neutral", Toast.LENGTH_SHORT).show();
        }
    });

    final AlertDialog alert = builder.create();
    alert.setTitle("number picker");
    alert.setOnShowListener(new DialogInterface.OnShowListener() {
        @Override
        public void onShow(DialogInterface dialog) {
            Button posButton = alert.getButton(DialogInterface.BUTTON_POSITIVE);
            Button negButton = alert.getButton(DialogInterface.BUTTON_NEGATIVE);
            Button neuButton = alert.getButton(DialogInterface.BUTTON_NEUTRAL);

            LinearLayout.LayoutParams posParams = (LinearLayout.LayoutParams) posButton.getLayoutParams();
            posParams.weight = 1;
            posParams.width = LinearLayout.LayoutParams.MATCH_PARENT;
            posParams.height = LinearLayout.LayoutParams.WRAP_CONTENT;

            LinearLayout.LayoutParams negParams = (LinearLayout.LayoutParams) negButton.getLayoutParams();
            negParams.weight = 1;
            negParams.width = LinearLayout.LayoutParams.MATCH_PARENT;
            posParams.height = LinearLayout.LayoutParams.WRAP_CONTENT;
            LinearLayout.LayoutParams neuParams = (LinearLayout.LayoutParams) neuButton.getLayoutParams();
            neuParams.weight = 1;
            neuParams.width = LinearLayout.LayoutParams.MATCH_PARENT;
            neuParams.height = LinearLayout.LayoutParams.WRAP_CONTENT;


            posButton.setLayoutParams(posParams);
            negButton.setLayoutParams(negParams);
            neuButton.setLayoutParams(neuParams);
        }
    });
    alert.show();

以上是按照上面链接的建议编写的完整代码。而且我只有这个：

似乎肯定按钮已推到右角并消失了。

有人可以解决这个问题吗？

根据Kushan的建议，我从对话框的showshow监听器中取出布局设置代码，完整的代码如下：

AlertDialog.Builder builder = new AlertDialog.Builder(new ContextThemeWrapper(this, android.R.style.Theme_Dialog));
    View pickerView = getLayoutInflater().inflate(R.layout.picker_dialog, null);
    builder.setView(pickerView);
    builder.setMessage("AlertDialog").setCancelable(false).setPositiveButton("Positive", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(getApplicationContext(), "got it!", Toast.LENGTH_SHORT).show();
        }
    });
    builder.setNegativeButton("Negative", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });
    builder.setNeutralButton("Neutral", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(getApplicationContext(), "Neutral", Toast.LENGTH_SHORT).show();
        }
    });

    AlertDialog alert = builder.create();
    alert.setTitle("number picker");
    alert.show();

    LinearLayout.LayoutParams buttonParams;
    Button buttonPositive = alert.getButton(AlertDialog.BUTTON_POSITIVE);
    buttonParams = (LinearLayout.LayoutParams) buttonPositive.getLayoutParams();
    buttonParams.weight = 1;
    buttonParams.width = buttonParams.MATCH_PARENT;

    Button buttonNegative = alert.getButton(AlertDialog.BUTTON_NEGATIVE);
    buttonParams = (LinearLayout.LayoutParams) buttonNegative.getLayoutParams();
    buttonParams.weight = 1;
    buttonParams.width = buttonParams.MATCH_PARENT;

    Button buttonNeutral = alert.getButton(AlertDialog.BUTTON_NEUTRAL);
    buttonParams = (LinearLayout.LayoutParams) buttonNeutral.getLayoutParams();
    buttonParams.weight = 1;
    buttonParams.width = buttonParams.MATCH_PARENT;

我得到了与上述相同的结果