activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/rl" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="0dp" tools:context=".MainActivity" android:background="#cfc883" > <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" android:elevation="4dp" android:theme="@style/ThemeOverlay.AppCompat.ActionBar" app:popupTheme="@style/ThemeOverlay.AppCompat.Light" /> <TextView android:id="@+id/tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="Change This Text Color\nUsing Toolbar Menu" android:textSize="50dp" android:gravity="center" android:textStyle="bold" android:fontFamily="sans-serif-condensed" /> </RelativeLayout> res/menu/toolbar_options_menu.xml
<?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" > <item android:id="@+id/red" android:title="Red" android:icon="@drawable/ic_palette_red_36dp" app:showAsAction="always|withText" android:orderInCategory="1" /> <item android:id="@+id/green" android:title="Green" android:icon="@drawable/ic_palette_green_36dp" app:showAsAction="always|withText" android:orderInCategory="2" /> <item android:id="@+id/blue" android:title="Blue" android:icon="@drawable/ic_palette_blue_36dp" app:showAsAction="ifRoom|withText" android:orderInCategory="3" /> </menu> MainActivity.java
package com.cfsuman.me.androidcodesnippets; import android.app.Activity; import android.content.Context; import android.graphics.Color; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.widget.RelativeLayout; import android.widget.TextView; import android.support.v7.widget.Toolbar; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private Context mContext; private Activity mActivity; private RelativeLayout mRelativeLayout; private TextView mTextView; private Toolbar mToolbar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Get the application context mContext = getApplicationContext(); // Get the activity mActivity = MainActivity.this; // Get the widgets reference from XML layout mRelativeLayout = (RelativeLayout) findViewById(R.id.rl); mTextView = (TextView) findViewById(R.id.tv); mToolbar = (Toolbar) findViewById(R.id.toolbar); // Set a title for toolbar mToolbar.setTitle("Add, Edit and Remove Menu Item"); mToolbar.setTitleTextColor(Color.WHITE); // Set support actionbar with toolbar setSupportActionBar(mToolbar); // Change the toolbar background color mToolbar.setBackgroundColor(Color.parseColor("#FF68BFD1")); } @Override public boolean onCreateOptionsMenu(Menu menu){ MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.toolbar_options_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item){ switch(item.getItemId()){ case R.id.red: // Set the text color to red mTextView.setTextColor(Color.RED); return true; case R.id.green: // Set the text color to green mTextView.setTextColor(Color.GREEN); return true; case R.id.blue: // Set the text color to blue mTextView.setTextColor(Color.BLUE); return true; default: return super.onOptionsItemSelected(item); } } /* public boolean onPrepareOptionsMenu (Menu menu) Prepare the Screen's standard options menu to be displayed. This is called right before the menu is shown, every time it is shown. You can use this method to efficiently enable/disable items or otherwise dynamically modify the contents. The default implementation updates the system menu items based on the activity's state. Deriving classes should always call through to the base class implementation. Parameters menu : The options menu as last shown or first initialized by onCreateOptionsMenu(). Returns You must return true for the menu to be displayed; if you return false it will not be shown. */ @Override public boolean onPrepareOptionsMenu(Menu menu){ //------------------- Add new Menu Item --------------------------------- // Specify an id for the new menu item int purpleId = 101; // Check the menu item already added or not if(menu.findItem(purpleId) == null){ /* public abstract MenuItem add (int groupId, int itemId, int order, CharSequence title) Add a new item to the menu. This item displays the given title for its label. Parameters groupId : The group identifier that this item should be part of. This can be used to define groups of items for batch state changes. Normally use NONE if an item should not be in a group. itemId : Unique item ID. Use NONE if you do not need a unique ID. order : The order for the item. Use NONE if you do not care about the order. title : The text to display for the item. Returns The newly added menu item. */ /* public static tamat int NONE Value to use for group and item identifier integers when you don't care about them. Constant Value: 0 (0x00000000) */ // If it not exists then add the menu item to menu MenuItem purple = menu.add( Menu.NONE, // groupId purpleId, // itemId 2, // order "Purple" // title ); /* public abstract MenuItem setIcon (int iconRes) Change the icon associated with this item. This icon will not always be shown, so the title should be sufficient in describing this item. This method will set the resource ID of the icon which will be used to lazily get the Drawable when this item is being shown. Parameters iconRes : The new icon (as a resource ID) to be displayed. Returns This Item so additional setters can be called. */ // Set an icon for the new menu item purple.setIcon(R.drawable.ic_palette_purple_36dp); /* public abstract MenuItem setShowAsActionFlags (int actionEnum) Sets how this item should display in the presence of an Action Bar. The parameter actionEnum is a flag set. One of SHOW_AS_ACTION_ALWAYS, SHOW_AS_ACTION_IF_ROOM, or SHOW_AS_ACTION_NEVER should be used, and you may optionally OR the value with SHOW_AS_ACTION_WITH_TEXT. SHOW_AS_ACTION_WITH_TEXT requests that when the item is shown as an action, it should be shown with a text label. Note: This method differs from setShowAsAction(int) only in that it returns the current MenuItem instance for call chaining. Parameters actionEnum : How the item should display. One of SHOW_AS_ACTION_ALWAYS, SHOW_AS_ACTION_IF_ROOM, or SHOW_AS_ACTION_NEVER. SHOW_AS_ACTION_NEVER is the default. Returns This MenuItem instance for call chaining. */ // Set the show as action flags for new menu item purple.setShowAsActionFlags( MenuItem.SHOW_AS_ACTION_WITH_TEXT | MenuItem.SHOW_AS_ACTION_ALWAYS ); /* public abstract MenuItem setOnMenuItemClickListener ( MenuItem.OnMenuItemClickListener menuItemClickListener) Set a custom listener for invocation of this menu item. In most situations, it is more efficient and easier to use onOptionsItemSelected(MenuItem) or onContextItemSelected(MenuItem). Parameters menuItemClickListener : The object to receive invokations. Returns This Item so additional setters can be called. */ // Set a click listener for the new menu item purple.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem menuItem) { Toast.makeText(mContext,menuItem.getTitle()+" Clicked",Toast.LENGTH_SHORT).show(); mTextView.setTextColor(Color.parseColor("#800080")); return true; } }); Toast.makeText(mContext,"Purple MenuItem Added",Toast.LENGTH_SHORT).show(); } //------------------- Remove a Menu Item --------------------------------- /* public abstract MenuItem findItem (int id) Return the menu item with a particular identifier. Parameters id : The identifier to find. Returns The menu item object, or null if there is no item with this identifier. */ // Remove a menu item from menu if(menu.findItem(R.id.blue)!=null){ /* public abstract void removeItem (int id) Remove the item with the given identifier. Parameters id : The item to be removed. If there is no item with this identifier, nothing happens. */ // If blue menu item is not deleted then delete/remove it from the menu menu.removeItem(R.id.blue); Toast.makeText(mContext,"Blue MenuItem Deleted",Toast.LENGTH_SHORT).show(); } //------------------- Update a Menu Item --------------------------------- // Update/modify/change a menu item MenuItem green = menu.findItem(R.id.green); if(green.getTitle() != "Green Text"){ // If green menu item title not updated then update/change it green.setTitle("Green Text"); Toast.makeText(mContext,"Green MenuItem Edited",Toast.LENGTH_SHORT).show(); } super.onPrepareOptionsMenu(menu); return true; } } 
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