FlyoutMenus

項目地址： ShamylZakariya/FlyoutMenus 簡介：Simple material-style flyout menus for Android. There are many flyout type menus for Android, but this one is mine.

Simple material-style flyout menus for Android. There are many flyout type menus for Android, but this one is mine.

compile 'org.zakariya.flyoutmenus:flyoutmenu:0.5.3'

• minSdkVersion: 14?Note: when running on SDK less than 18, hardware rendering is disabled. This means that button shadows are clipped. To work around this, add a bit of padding to the view.

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XML

<org.zakariya.flyoutmenu.FlyoutMenuViewandroid:id="@+id/myMenu"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginBottom="@dimen/flyout_menu_button_margin"android:layout_marginLeft="@dimen/flyout_menu_button_margin"android:layout_marginRight="@dimen/flyout_menu_button_margin"android:layout_marginTop="@dimen/flyout_menu_button_margin"app:fmButtonSize="@dimen/flyout_menu_button_size"app:fmItemHeight="@dimen/palette_menu_item_size"app:fmItemMargin="0dp"app:fmItemWidth="@dimen/palette_menu_item_size"app:fmMenuAnchor="top"/>

FlyoutMenuView attributes (all have?fm?prefix) are:

// the size of the button <attr name="fmButtonSize" format="dimension"/>// the background color of the trigger button <attr name="fmButtonBackgroundColor" format="color"/>// the background color of the menu <attr name="fmMenuBackgroundColor" format="color"/>// the color drawn behind the selected menu item <attr name="fmSelectedItemBackgroundColor" format="color"/>// width of items in the menu <attr name="fmItemWidth" format="dimension"/>// height of items in the menu <attr name="fmItemHeight" format="dimension"/>// margin around items in the menu <attr name="fmItemMargin" format="dimension"/>// menu anchoring position (see below) <attr name="fmMenuAnchor" format="string"/>// margin around the menu - menu will be positioned this far away from the button, but // will also use this to respect screen edges <attr name="fmMenuMargin" format="dimension"/>// if provided, the trigger button will use this as a drawable <attr name="fmButtonSrc" format="reference"/>// elevation for the trigger button. if 0, no shadow is drawn <attr name="fmButtonElevation" format="dimension"/>// elevation for the menu. if 0, no shadow is drawn <attr name="fmMenuElevation" format="dimension"/>// if true, a shield (like for dialogs) is drawn behind the menu <attr name="fmShieldVisible" format="boolean"/>// color of shield drawn behind menu, if shieldVisible == true <attr name="fmShieldColor" format="color"/>// if true, menu operates in "tap to open", "tap to select and dismiss" mode <attr name="fmDialogMode" format="boolean"/>

The?fmMenuAnchor?attribute takes the following values:

• top?: menu attached above the button
• right?|?end?: menu attached to right of button
• bottom?: menu attached beneath button
• left?|?start?: menu attached to left of button
• center?: menu centered on top of button

Java

To use a FlyoutMenuView, you must provide a?FlyoutMenuView.Adapter?(which providesFlyoutMenuView.MenuItem?instances) and a?FlyoutMenuView.Layout?which describes how to position the items in the menu.

You must also provide a subclass of?FlyoutMenuView.MenuItem?to render your items. You may also subclassFlyoutMenuView.ButtonRenderer?to render your trigger button, if you don't want to assign a?Drawable.

Here's an example implementation of?FlyoutMenuView.MenuItem?and?FlyoutmenuView.ButtonRenderer?which draws a simple unicode character. I use it in the demo app to render emoji.

public class EmojiFlyoutMenu {static String getEmojiByUnicode(int unicode){return new String(Character.toChars(unicode));}public static class MenuItem extends FlyoutMenuView.MenuItem {int emojiCode;String emojiString;TextPaint textPaint;public MenuItem(int id, int emojiCode, float size, @ColorInt int color) {super(id);this.emojiCode = emojiCode;this.emojiString = getEmojiByUnicode(emojiCode);textPaint = new TextPaint();textPaint.setTextSize(size);textPaint.setTextAlign(Paint.Align.CENTER);textPaint.setStyle(Paint.Style.FILL);textPaint.setColor(color);}public int getEmojiCode() {return emojiCode;}@Overridepublic void onDraw(Canvas canvas, RectF bounds, float degreeSelected) {canvas.drawText(emojiString, bounds.centerX(), bounds.centerY() - ((textPaint.descent() + textPaint.ascent()) / 2), textPaint);}}public static class ButtonRenderer extends FlyoutMenuView.ButtonRenderer {int emojiCode;String emojiString;Paint paint;TextPaint textPaint;public ButtonRenderer(int emojiCode, float size, @ColorInt int color) {super();this.setEmojiCode(emojiCode);paint = new Paint();paint.setAntiAlias(true);textPaint = new TextPaint();textPaint.setTextSize(size);textPaint.setTextAlign(Paint.Align.CENTER);textPaint.setStyle(Paint.Style.FILL);textPaint.setColor(color);}public int getEmojiCode() {return emojiCode;}public void setEmojiCode(int emojiCode) {this.emojiCode = emojiCode;this.emojiString = getEmojiByUnicode(this.emojiCode);}@Overridepublic void onDrawButtonContent(Canvas canvas, RectF buttonBounds, @ColorInt int buttonColor, float alpha) {textPaint.setAlpha((int) (alpha * 255f));canvas.drawText(emojiString, buttonBounds.centerX(), buttonBounds.centerY() - ((textPaint.descent() + textPaint.ascent()) / 2), textPaint);}} }

To use the above:

FlyoutMenuView smileyFlyoutMenu = findViewById(R.id.smileyFlyoutMenu); int[] emojiCodes = {0x1F60D, //smiling face heart shaped eyes0x1F605, // smiling face with open mouth and cold sweat0x1F60A, // smiling face0x1F613, // face with cold sweat0x1F61E, // disappointed face0x1F620, // angry face0x1F62D, // loudly crying face0x1F4A9, // pile of poo };@ColorInt int color = ContextCompat.getColor(this, R.color.smileyMenuCharColor); float fontSizeInMenu = getResources().getDimension(R.dimen.smiley_menu_item_size) * 0.5f; float fontSizeInButton = getResources().getDimension(R.dimen.flyout_menu_button_size) * 0.5f;// build a List<> of EmojiFlyoutMenu.MenuItem List<EmojiFlyoutMenu.MenuItem> menuItems = new ArrayList<>(); for (int code : emojiCodes) {menuItems.add(new EmojiFlyoutMenu.MenuItem(menuItems.size(), code, fontSizeInMenu, color)); }// assign a GridLayout with 2 columns and unspecified rows (allows menu to grow vertically) smileyFlyoutMenu.setLayout(new FlyoutMenuView.GridLayout(2, FlyoutMenuView.GridLayout.UNSPECIFIED));// assign the menuItems via an ArrayAdapter smileyFlyoutMenu.setAdapter(new FlyoutMenuView.ArrayAdapter<>(menuItems));// create and assign the button renderer. we'll change the button renderer's emoji in the callback below final EmojiFlyoutMenu.ButtonRenderer renderer = new EmojiFlyoutMenu.ButtonRenderer(emojiCodes[0], fontSizeInButton, color); smileyFlyoutMenu.setButtonRenderer(renderer);smileyFlyoutMenu.setSelectionListener(new FlyoutMenuView.SelectionListener() {@Overridepublic void onItemSelected(FlyoutMenuView flyoutMenuView, FlyoutMenuView.MenuItem item) {// user has selected an item. update the button renderer's emoji to matchrenderer.setEmojiCode(((EmojiFlyoutMenu.MenuItem) item).getEmojiCode());}@Overridepublic void onDismissWithoutSelection(FlyoutMenuView flyoutMenuView) {} });

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