AlertDialog仅在Android <7.0上显示中性按钮

Question

我制作了一个AlertDialog ，它具有三个按钮（正，负，中性），当我在手机（Android 7.0）上对其进行测试时，它可以正常工作，但是我有几个朋友（分别使用Android 5.0和6.0）对其进行了测试，而他们只有显示中性按钮。

这是代码：

AlertDialog.Builder isSelfieBuilder = new AlertDialog.Builder(context);
isSelfieBuilder.setTitle("Choose picture orientation.");

// Set up the buttons
isSelfieBuilder.setPositiveButton("Selfie", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        //Do something
    }
});
isSelfieBuilder.setNeutralButton("Landscape", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        //Do something
    }
});
isSelfieBuilder.setNegativeButton("Portrait", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        //Do something
    }
});
final AlertDialog picTypeDialog = isSelfieBuilder.create();
picTypeDialog.show();

final Button positiveButton = picTypeDialog.getButton(AlertDialog.BUTTON_POSITIVE);
LinearLayout.LayoutParams positiveButtonLL = (LinearLayout.LayoutParams) positiveButton.getLayoutParams();
positiveButtonLL.width = ViewGroup.LayoutParams.MATCH_PARENT;
positiveButton.setLayoutParams(positiveButtonLL);

final Button neutralButton = picTypeDialog.getButton(AlertDialog.BUTTON_NEUTRAL);
LinearLayout.LayoutParams neutralButtonLL = (LinearLayout.LayoutParams) neutralButton.getLayoutParams();
neutralButtonLL.width = ViewGroup.LayoutParams.MATCH_PARENT;
neutralButton.setLayoutParams(neutralButtonLL);

final Button negativeButton = picTypeDialog.getButton(AlertDialog.BUTTON_NEGATIVE);
LinearLayout.LayoutParams negativeButtonLL = (LinearLayout.LayoutParams) negativeButton.getLayoutParams();
negativeButtonLL.width = ViewGroup.LayoutParams.MATCH_PARENT;
negativeButton.setLayoutParams(negativeButtonLL);

有人知道为什么我只能在其中找到中立按钮吗？ 我尝试删除对齐部分（ .show()之后的所有内容），但得到的结果相同。 我正在使用API​​ 21（5.0）在模拟器上进行测试，但遇到了同样的问题。

Answer 1

final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setTitle("Choose picture orientation.")
               .setPositiveButton("Selfie", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        //doSomething
                    }
                })
                .setNeutralButton("Landscape", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        //doSomething
                    }
                })
                .setNegativeButton("Portrait", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        //doSomething
                    }
                });
        AlertDialog dialog = builder.create();
        dialog.show();

Answer 2

因此，我“修复”此问题的方法是完全禁用：

AlertDialog picTypeDialog = isSelfieBuilder.create();
picTypeDialog.show();

并简单地替换为

isSelfieBuilder.show();

即使按钮之间的间距不够理想，并且即使没有AlertDialog我也无法编辑按钮布局，它现在在所有设备上都能正常工作。