具有默认主题的自定义 AlertDialog

Question

我正在尝试使用默认主题构建自定义 AlertDialog，以便我可以在代码中的多个位置使用相同的 AlertDialog。我通过扩展 AlertDialog 并编写我的自定义业务逻辑来决定对话框中的消息来创建 class。问题是，当我调用 AlertDialog.show() 时，我看到一个没有显示对话框的黑色覆盖层。这是我的代码：

public class ClosestShrutiDialog extends AlertDialog {

    private String mLessonId;
    private Activity mActivity;
    private View mParentView;

    private OnClickedListener mOnClickListerner;

    public ClosestShrutiDialog(@NonNull Activity activity, final String lessonId, final View parentView) {
        super(activity);
        this.mLessonId = lessonId;
        this.mActivity = activity;
        this.mParentView = parentView;
    }

    public void setmOnClickListerner(OnClickedListener mOnClickListerner) {
        this.mOnClickListerner = mOnClickListerner;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        // My business login to decide the msg related params ....

        // showing message to user to select the alternate shruti ...
        final String msg = mActivity.getResources().getString(R.string.user_alternate_shruti_msg,
                userShrutiLabel,
                closestShruti.getLabel());

        this.setMessage(msg);
        this.setButton(android.support.v7.app.AlertDialog.BUTTON_POSITIVE,
                mActivity.getResources().getString(R.string.yes),
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        if(mOnClickListerner != null) {
                            mOnClickListerner.proceedWithChange(closestShruti);
                        }
                    }
                });
        this.setButton(android.support.v7.app.AlertDialog.BUTTON_NEGATIVE,
                mActivity.getResources().getString(R.string.cancel),
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                });
    }

    public interface OnClickedListener {
        void proceedWithChange(final Shruti closestShruti);
    }
}

我不确定为什么它无法获取默认模板并显示它。当我使用 AlerDialog.Builder(Context)，而没有创建自定义 class，我能够正确地看到对话框。有什么建议吗？

Answer 1

非常非常老的问题:-)

自定义警报对话框 - How to create a Custom Dialog box in android?

自定义对话框主题 - How to change theme for AlertDialog

Answer 2

        **--java file code----**
    AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.MyAlertDialogStyle);
    builder.setTitle("AppCompatDialog");
    builder.setMessage("Lorem ipsum dolor...");
    builder.setPositiveButton("OK", null);
    builder.setNegativeButton("Cancel", null);
    builder.show();


**----and you can put into xml file
styles.xml - Custom style----**

<style name="MyAlertDialogStyle" parent="Theme.AppCompat.Light.Dialog.Alert">
    <!-- Used for the buttons -->
    <item name="colorAccent">#FFC107</item>
    <!-- Used for the title and text -->
    <item name="android:textColorPrimary">#FFFFFF</item>
    <!-- Used for the background -->
    <item name="android:background">#4CAF50</item>
</style>

**---and also you can add new style----**
<style name="MyTitleTextStyle">
    <item name="android:textColor">#FFEB3B</item>
    <item name="android:textAppearance">@style/TextAppearance.AppCompat.Title</item>
</style> 
**---and alert dialong style---**
<style name="MyAlertDialogStyle" parent="Theme.AppCompat.Light.Dialog.Alert">
...
...
    <item name="android:windowTitleStyle">@style/MyTitleTextStyle</item>
</style>

Answer 3

我找到了解决方案。基本上，我不应该为 AlertDialog 覆盖 onCreate() 方法。如果我这样做，那么通常会提供用于渲染的布局。相反，无论我在上面代码的 onCreate() 方法中做了什么，我都将它移到另一个函数中，然后从 class 的构造中调用它，这对我有用。代码类似于：

public class ClosestShrutiDialog extends AlertDialog {

    private String mLessonId;
    private Activity mActivity;
    private View mParentView;

    private OnClickedListener mOnClickListerner;

    public ClosestShrutiDialog(@NonNull Activity activity, final String lessonId, final View parentView) {
        super(activity);
        this.mLessonId = lessonId;
        this.mActivity = activity;
        this.mParentView = parentView;

        setupView();
    }

    public void setmOnClickListerner(OnClickedListener mOnClickListerner) {
        this.mOnClickListerner = mOnClickListerner;
    }


    private void setupView() {

        // My business login to decide the msg related params ....

        // showing message to user to select the alternate shruti ...
        final String msg = mActivity.getResources().getString(R.string.user_alternate_shruti_msg,
                userShrutiLabel,
                closestShruti.getLabel());

        this.setMessage(msg);
        this.setButton(android.support.v7.app.AlertDialog.BUTTON_POSITIVE,
                mActivity.getResources().getString(R.string.yes),
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        if(mOnClickListerner != null) {
                            mOnClickListerner.proceedWithChange(closestShruti);
                        }
                    }
                });
        this.setButton(android.support.v7.app.AlertDialog.BUTTON_NEGATIVE,
                mActivity.getResources().getString(R.string.cancel),
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                });
    }

    public interface OnClickedListener {
        void proceedWithChange(final Shruti closestShruti);
    }
}

具有默认主题的自定义 AlertDialog

Custom AlertDialog with default theme

java

android

android-alertdialog

android-dialog