NavigationMenuItemView.java

package moe.feng.bilinyan.view.internal;

import android.content.Context;
import android.content.res.ColorStateList;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.support.v4.graphics.drawable.DrawableCompat;
import android.support.v4.widget.TextViewCompat;
import android.support.v7.internal.view.menu.MenuItemImpl;
import android.support.v7.internal.view.menu.MenuView.ItemView;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import android.widget.TextView;

import moe.feng.bilinyan.R;

public class NavigationMenuItemView extends TextView implements ItemView {

	private static final int[] CHECKED_STATE_SET = new int[]{16842912};
	private int mIconSize;
	private MenuItemImpl mItemData;
	private ColorStateList mIconTintList;

	public NavigationMenuItemView(Context context) {
		this(context, null);
	}

	public NavigationMenuItemView(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public NavigationMenuItemView(Context context, AttributeSet attrs, int defStyleAttr) {
		super(context, attrs, defStyleAttr);
		this.mIconSize = context.getResources().getDimensionPixelSize(R.dimen.navigation_icon_size);
	}

	public void initialize(MenuItemImpl itemData, int menuType) {
		this.mItemData = itemData;
		this.setVisibility(itemData.isVisible() ? View.VISIBLE : View.GONE);
		if (this.getBackground() == null) {
			this.setBackground(this.createDefaultBackground());
		}

		this.setCheckable(itemData.isCheckable());
		this.setChecked(itemData.isChecked());
		this.setEnabled(itemData.isEnabled());
		this.setTitle(itemData.getTitle());
		this.setIcon(itemData.getIcon());
	}

	private StateListDrawable createDefaultBackground() {
		TypedValue value = new TypedValue();
		if (this.getContext().getTheme().resolveAttribute(R.attr.colorControlHighlight, value, true)) {
			StateListDrawable drawable = new StateListDrawable();
			drawable.addState(CHECKED_STATE_SET, new ColorDrawable(value.data));
			drawable.addState(EMPTY_STATE_SET, new ColorDrawable(0));
			return drawable;
		} else {
			return null;
		}
	}

	public MenuItemImpl getItemData() {
		return this.mItemData;
	}

	public void setTitle(CharSequence title) {
		this.setText(title);
	}

	public void setCheckable(boolean checkable) {
		this.refreshDrawableState();
	}

	public void setChecked(boolean checked) {
		this.refreshDrawableState();
	}

	public void setShortcut(boolean showShortcut, char shortcutKey) {
	}

	public void setIcon(Drawable icon) {
		if(icon != null) {
			icon = DrawableCompat.wrap(icon);
			icon = icon.mutate();
			icon.setBounds(0, 0, this.mIconSize, this.mIconSize);
			DrawableCompat.setTintList(icon, this.mIconTintList);
		}

		TextViewCompat.setCompoundDrawablesRelative(this, icon, null, null, null);
	}

	public boolean prefersCondensedTitle() {
		return false;
	}

	public boolean showsIcon() {
		return true;
	}

	protected int[] onCreateDrawableState(int extraSpace) {
		int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
		if(this.mItemData != null && this.mItemData.isCheckable() && this.mItemData.isChecked()) {
			mergeDrawableStates(drawableState, CHECKED_STATE_SET);
		}

		return drawableState;
	}

	void setIconTintList(ColorStateList tintList) {
		this.mIconTintList = tintList;
		if(this.mItemData != null) {
			this.setIcon(this.mItemData.getIcon());
		}

	}

}