将android弹出对话框与屏幕的预期区域对齐

Question

我目前正在修改已由某人完成的 Android 应用程序。我需要修改此应用程序的列表视图中可见的虚线下方的现有居中对齐弹出对话框，如下所示。

我尝试了一些不同的方法来让这个弹出对话框与那些虚线对齐，但都没有奏效。

WindowManager.LayoutParams param = dialog.getWindow().getAttributes();
    param.gravity = Gravity.TOP | Gravity.CENTER_HORIZONTAL;
    param.y = y;
    dialog.getWindow().setAttributes(param); // param.x and param.y also not working 

我附上了我的预期和实际结果，以及下面的所有相关代码。

dialog_options_menu.xml

    <?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:cardBackgroundColor="@color/white"
    app:cardCornerRadius="10dp"
    app:cardUseCompatPadding="false">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <LinearLayout
            android:id="@+id/option_download"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center_vertical"
            android:minWidth="200dp"
            android:orientation="horizontal"
            android:paddingHorizontal="16dp"
            android:paddingVertical="18dp">

            <ImageView
                android:id="@+id/ivDownload"
                android:layout_width="24dp"
                android:layout_height="wrap_content"
                app:srcCompat="@drawable/ic_download" />

            <TextView
                android:id="@+id/tvDownload"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginHorizontal="12dp"
                android:text="@string/download_lowercase"
                android:textColor="@color/black"
                android:textSize="16sp" />

        </LinearLayout>

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="@color/light_grey" />

        <LinearLayout
            android:id="@+id/option_like"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center_vertical"
            android:minWidth="200dp"
            android:orientation="horizontal"
            android:paddingHorizontal="16dp"
            android:paddingVertical="18dp">

            <ImageView
                android:id="@+id/ivLike"
                android:layout_width="24dp"
                android:layout_height="wrap_content"
                app:srcCompat="@drawable/ic_like" />

            <TextView
                android:id="@+id/tvLike"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginHorizontal="12dp"
                android:text="@string/add_favorites"
                android:textColor="@color/black"
                android:textSize="16sp" />

        </LinearLayout>

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="@color/light_grey" />

        <LinearLayout
            android:id="@+id/option_share"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center_vertical"
            android:minWidth="200dp"
            android:orientation="horizontal"
            android:paddingHorizontal="16dp"
            android:paddingVertical="18dp">

            <ImageView
                android:id="@+id/ivShare"
                android:layout_width="24dp"
                android:layout_height="wrap_content"
                app:srcCompat="@drawable/ic_share" />

            <TextView
                android:id="@+id/tvShare"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginHorizontal="12dp"
                android:text="@string/share_dialog_text"
                android:textColor="@color/black"
                android:textSize="16sp" />

        </LinearLayout>
    </LinearLayout>

</androidx.cardview.widget.CardView>

DialogHelper.java

 public static void showEpisodeOptionsDialog(Context context, boolean shouldBeDownloaded, boolean isDownloading, boolean isFavorite, int y, OnEpisodeOptionsMenuItemClickListener clickListener){
        final Dialog dialog = new Dialog(context);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setCancelable(true);
        dialog.setContentView(R.layout.dialog_options_menu);
        dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));

        WindowManager.LayoutParams param = dialog.getWindow().getAttributes();
        param.gravity = Gravity.TOP | Gravity.CENTER_HORIZONTAL;
        param.y = y;
        dialog.getWindow().setAttributes(param);

        TextView tvDownload = (TextView) dialog.findViewById(R.id.tvDownload);
        TextView tvLike = (TextView) dialog.findViewById(R.id.tvLike);
        ImageView ivDownload = (ImageView) dialog.findViewById(R.id.ivDownload);
        ImageView ivLike = (ImageView) dialog.findViewById(R.id.ivLike);
        LinearLayout btnDownload = (LinearLayout) dialog.findViewById(R.id.option_download);
        LinearLayout btnLike = (LinearLayout) dialog.findViewById(R.id.option_like);
        LinearLayout btnShare = (LinearLayout) dialog.findViewById(R.id.option_share);

        String downloadText, likeText;
        int selectedColor = ContextCompat.getColor(context, R.color.option_selected_orange);
        int defaultColor = ContextCompat.getColor(context, R.color.black);

        if (shouldBeDownloaded) {
            if (isDownloading) {
                downloadText = context.getString(R.string.downloading_lowercase);
            } else {
                downloadText = context.getString(R.string.remove_download);
            }
            ivDownload.setImageResource(R.drawable.ic_bin);
            tvDownload.setTextColor(selectedColor);
        } else {
            downloadText = context.getString(R.string.download_lowercase);
            ImageViewCompat.setImageTintList(ivDownload, ColorStateList.valueOf(defaultColor));
            tvDownload.setTextColor(defaultColor);
        }

        if (isFavorite) {
            likeText = context.getString(R.string.remove_favorites);
            ImageViewCompat.setImageTintList(ivLike, ColorStateList.valueOf(selectedColor));
            tvLike.setTextColor(selectedColor);
        } else {
            likeText = context.getString(R.string.add_favorites);
            ImageViewCompat.setImageTintList(ivLike, ColorStateList.valueOf(defaultColor));
            tvLike.setTextColor(defaultColor);
        }

        tvDownload.setText(downloadText);
        tvLike.setText(likeText);

        btnDownload.setOnClickListener(v -> {
            dialog.dismiss();
            clickListener.onDownloadClicked();
        });
        btnLike.setOnClickListener(v -> {
            dialog.dismiss();
            clickListener.onLikeClicked();
        });
        btnShare.setOnClickListener(v -> {
            dialog.dismiss();
            clickListener.onShareClicked();
        });

        dialog.show();
    }

请告诉我这个弹出对话框如何与这些虚线对齐。

Answer 1

注意：您应该使用PopupMenu 来达到您的目的

1. 创建菜单 XML：

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/mute"
        android:orderInCategory="101"
        android:title="Mute"
        android:icon="@drawable/ic_baseline_volume_off_mute_24"
        android:iconTint="@color/text"
        app:showAsAction="never" />
    <item
        android:id="@+id/settings"
        android:orderInCategory="102"
        android:title="Settings"
        android:icon="@drawable/ic_baseline_settings_24"
        android:iconTint="@color/text"
        app:showAsAction="never" />
    <item
        android:id="@+id/share"
        android:orderInCategory="103"
        android:title="Share"
        android:icon="@drawable/ic_share"
        android:iconTint="@color/text"
        app:showAsAction="never" />
    <item
        android:id="@+id/leave"
        android:orderInCategory="104"
        android:title="Leave"
        android:icon="@drawable/ic_logout"
        android:iconTint="@color/text"
        app:showAsAction="never" />
</menu>

1. 显示弹出菜单的方法：

    private fun showPopupMenu() {
        val popup = PopupMenu(this, binding.layoutChatHeader.imageViewOptions)

        popup.apply {
            // inflate the popup menu
            menuInflater.inflate(R.menu.chat_channel_menu, menu)

            // popup menu item click listener
            setOnMenuItemClickListener {
                when (it.itemId) {
                    R.id.mute ->                     
                        true
                    R.id.settings ->                     
                        true
                    R.id.leave -> {
                        removeUser()
                        true
                    }
                    else -> false
                }

                false
            }
        }

        // show icons on popup menu
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            popup.setForceShowIcon(true)
        } else {
            try {
                val fields = popup.javaClass.declaredFields
                for (field in fields) {
                    if ("mPopup" == field.name) {
                        field.isAccessible = true
                        val menuPopupHelper = field[popup]
                        val classPopupHelper =
                            Class.forName(menuPopupHelper.javaClass.name)
                        val setForceIcons: Method = classPopupHelper.getMethod(
                            "setForceShowIcon",
                            Boolean::class.javaPrimitiveType
                        )
                        setForceIcons.invoke(menuPopupHelper, true)
                        break
                    }
                }
            } catch (e: Exception) {
                e.printStackTrace()
            }
        }

        // finally, show the popup menu
        popup.show()
    }

1. 在需要的地方打开弹出菜单（例如 onClickListener）：

imageViewOptions.setOnClickListener {
            showPopupMenu()
        }

Answer 2

好吧，你显示的是Dialog，而不是PopupWindow。而你实际上想显示ContextMenu

使用registerForContextMenu 并传递三个点View

然后覆盖 onCreateContextMenu 并扩展您的自定义菜单

@Override  
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {  
    super.onCreateContextMenu(menu, v, menuInfo);  
    MenuInflater inflater = getMenuInflater();  
    inflater.inflate(R.menu.some_custom_menu, menu);  
    menu.setHeaderTitle("Some title");  
}

并处理点击：

@Override  
public boolean onContextItemSelected(MenuItem item){  
    if(item.getItemId()==R.id.custom_menu_item){
        //handle click here
        return true; //handled
    }
    return false; // not handled
}