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" android:id="@+id/rl" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="10dp" tools:context=".MainActivity" android:background="#fcfdfb" > <TextView android:id="@+id/tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="Long Press\nThis Text To Open\nContext Menu" android:textSize="50dp" android:gravity="center" android:textStyle="bold" android:background="#d8f1e2" /> </RelativeLayout> res/menu/textview_context_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" app:showAsAction="always" /> <item android:id="@+id/green" android:title="Green" app:showAsAction="always" /> <item android:id="@+id/blue" android:title="Blue" app:showAsAction="always" /> <item android:id="@+id/black" android:title="Black" app:showAsAction="always" /> </menu> MainActivity.java
package com.cfsuman.me.androidcodesnippets; import android.app.Activity; import android.content.Context; import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.ContextMenu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.Window; import android.widget.RelativeLayout; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private Context mContext; private Activity mActivity; private RelativeLayout mRelativeLayout; private TextView mTextView; @Override protected void onCreate(Bundle savedInstanceState) { // Request window feature action kafe requestWindowFeature(Window.FEATURE_ACTION_BAR); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Get the application context mContext = getApplicationContext(); // Get the activity mActivity = MainActivity.this; // Change the action kafe color getSupportActionBar().setBackgroundDrawable( new ColorDrawable(Color.parseColor("#FFFF0004")) ); // Get the widgets reference from XML layout mRelativeLayout = (RelativeLayout) findViewById(R.id.rl); mTextView = (TextView) findViewById(R.id.tv); /* public void registerForContextMenu (View view) Registers a context menu to be shown for the given view (multiple views can show the context menu). This method will set the View.OnCreateContextMenuListener on the view to this activity, so onCreateContextMenu(ContextMenu, View, ContextMenuInfo) will be called when it is time to show the context menu. Parameters view : The view that should show a context menu. */ // First step to show a custom context menu on text view registerForContextMenu(mTextView); } /* public void onCreateContextMenu (ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) Called when a context menu for the view is about to be shown. Unlike onCreateOptionsMenu(Menu), this will be called every time the context menu is about to be shown and should be populated for the view (or item inside the view for AdapterView subclasses, this can be found in the menuInfo)). Use onContextItemSelected(android.view.MenuItem) to know when an item has been selected. It is not safe to hold onto the context menu after this method returns. Parameters menu : The context menu that is being built v : The view for which the context menu is being built menuInfo : Extra information about the item for which the context menu should be shown. This information will vary depending on the class of v. */ @Override public void onCreateContextMenu( ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo ){ super.onCreateContextMenu(menu, v, menuInfo); /* MenuInflater This class is used to instantiate menu XML files into Menu objects. For performance reasons, menu inflation relies heavily on pre-processing of XML files that is done at build time. */ /* public MenuInflater getMenuInflater () Returns a MenuInflater with this context. */ MenuInflater inflater = getMenuInflater(); /* public void inflate (int menuRes, Menu menu) Inflate a menu hierarchy from the specified XML resource. Throws InflateException if there is an error. Parameters menuRes : Resource ID for an XML layout resource to load (e.g., R.menu.main_activity) menu : The Menu to inflate into. The items and submenus will be added to this Menu. */ inflater.inflate(R.menu.textview_context_menu, menu); /* public abstract ContextMenu setHeaderTitle (CharSequence title) Sets the context menu header's title to the title given in title. Parameters title : The character sequence used for the title. Returns This ContextMenu so additional setters can be called. */ // Set a title for context menu menu.setHeaderTitle("Select a color for TextView text."); } /* public boolean onContextItemSelected (MenuItem item) This hook is called whenever an item in a context menu is selected. The default implementation simply returns false to have the normal processing happen (calling the item's Runnable or sending a message to its Handler as appropriate). You can use this method for any items for which you would like to do processing without those other facilities. Use getMenuInfo() to get extra information set by the View that added this menu item. Derived classes should call through to the base class for it to perform the default menu handling. Parameters item : The context menu item that was selected. Returns boolean : Return false to allow normal context menu processing to proceed, true to consume it here. */ @Override public boolean onContextItemSelected(MenuItem item){ // Handle the menu item selection switch(item.getItemId()){ case R.id.red: // Set the TextView text color to Red mTextView.setTextColor(Color.RED); Toast.makeText(mContext,"Red Selected",Toast.LENGTH_SHORT).show(); return true; case R.id.green: // Set the TextView text color to Green mTextView.setTextColor(Color.GREEN); Toast.makeText(mContext,"Green Selected",Toast.LENGTH_SHORT).show(); return true; case R.id.blue: // Set the TextView text color to Blue mTextView.setTextColor(Color.BLUE); Toast.makeText(mContext,"Blue Selected",Toast.LENGTH_SHORT).show(); return true; case R.id.black: // Set the TextView text color to Black mTextView.setTextColor(Color.BLACK); Toast.makeText(mContext,"Black Selected",Toast.LENGTH_SHORT).show(); return true; default: return super.onContextItemSelected(item); } } } 
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