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public class MainActivity extends AppCompatActivity {

    //1. Define identifiers for menu items of different colors:
    final private int RED = 110;
    final private int GREEN = 111;
    final private int BLUE = 112;
    final private int YELLOW = 113;
    final private int GRAY = 114;
    final private int CYAN = 115;
    final private int BLACK = 116;

    private TextView tv_test;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv_test = (TextView) findViewById(R.id.tv_test);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        menu.add(1, RED, 4, "Red");
        menu.add(1, GREEN, 2, "Green");
        menu.add(1, BLUE, 3, "Blue");
        menu.add(1, YELLOW, 1, "Yellow");
        menu.add(1, GRAY, 5, "Gray");
        menu.add(1, CYAN, 6, "Cyan");
        menu.add(1, BLACK, 7, "Black");
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        switch (id) {
            case RED:
                tv_test.setTextColor(Color.RED);
                break;
            case GREEN:
                tv_test.setTextColor(Color.GREEN);
                break;
            case BLUE:
                tv_test.setTextColor(Color.BLUE);
                break;
            case YELLOW:
                tv_test.setTextColor(Color.YELLOW);
                break;
            case GRAY:
                tv_test.setTextColor(Color.GRAY);
                break;
            case CYAN:
                tv_test.setTextColor(Color.CYAN);
                break;
            case BLACK:
                tv_test.setTextColor(Color.BLACK);
                break;
        }
        return super.onOptionsItemSelected(item);
    }
}

//Override methods related to ContextMenu
@Override
//Override the creation method for the context menu
public void onCreateContextMenu(ContextMenu menu, View v,
                                ContextMenu.ContextMenuInfo menuInfo) {
    MenuInflater inflator = new MenuInflater(this);
    inflator.inflate(R.menu.menu_context, menu);
    super.onCreateContextMenu(menu, v, menuInfo);
}

//This method is triggered when a context menu item is clicked
@Override
public boolean onContextItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.blue:
            tv_context.setTextColor(Color.BLUE);
            break;
        case R.id.green:
            tv_context.setTextColor(Color.GREEN);
            break;
        case R.id.red:
            tv_context.setTextColor(Color.RED);
            break;
    }
    return true;
}

Well, it's that simple~ You can set contexts for multiple Views, switch(v.getId) you know~
Also, just like the submenus we will talk about later, context menus cannot display icons!

---

## 3.SubMenu(Submenus)

The so-called submenu is simply another <**menu**> nested within an <**item**>

### Code Example:

**Running Effect Picture**

**Implementation Code:**

Write the Menu file for the submenu: menu_sub.xml:

Then we change the content of the above two context menu methods and replace it with the following code:

Well, it's very simple, right? Also, if you want to add a submenu in Java code, you can call addSubMenu()

For example: SubMenu file = menu.addSubMenu("File"); The file also needs to add menu items with addItem!

---

## 4.PopupMenu(Pop-up Menu)

A thing similar to PopupWindow, it can conveniently display a pop-up menu under a specified View, and
its menu options can come from Menu resources. Let's write a simple example to use this thing~

### Usage Example:

**Running Effect Picture:**

**Implementation Code:**

Menu resource file: menu_pop.xml:

Add a button in the layout, then add a click event:

**MainActivity.java**: