Use menu resources to implement option menus and context menus

1 Menu resource file

The menu resource file is in res/menu Under the table of contents , Root element usage <menu></menu> Mark , The tag can contain multiple <item></item> Mark , Used to define menu items .
<item> Common attributes of tags are shown in table 1：

attribute	describe
android:id	Set up ID
android:title	Set title
android:alphabeticShortcut	Specify character shortcuts
android:numericShortcut	Specify the numeric shortcut key
android:icon	Assign icons
android:enabled	Specifies whether menu items are available
android:checkable	Specifies whether the menu item is optional
android:checked	Specifies whether the menu item is selected
android:visible	Specifies whether the menu item is visible

surface 1 <item> Common attributes of tags

2 Use menu resources

2.1 Options menu

When the user clicks the menu button , The pop-up menu is the options menu .
OptionMenu: Implement the options menu
MainActivity.java

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater menuInflater = new MenuInflater(this);
        menuInflater.inflate(R.menu.menu, menu);
        return super.onCreateOptionsMenu(menu);
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.settings:
                Intent intent = new Intent(MainActivity.this, Settings.class);
                startActivity(intent);
                break;
            case R.id.regard:
                Intent intent1 = new Intent(MainActivity.this, Regard.class);
                startActivity(intent1);
                break;
        }
        return super.onOptionsItemSelected(item);
    }
}

https://github.com/hanyuhang-hz/android-demos

2.2 Context menu

When the user presses and holds the component , The pop-up menu is the context menu .
ContextMenu: Implement context menu
MainActivity.java

public class MainActivity extends Activity {
    TextView introduce;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        introduce = (TextView) findViewById(R.id.introduce);
        //  Register context menu for text box 
        registerForContextMenu(introduce);
    }
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        MenuInflater inflater = new MenuInflater(this);
        inflater.inflate(R.menu.introduce_menu, menu);
    }
    @Override
    public boolean onContextItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menu_copy:
                Toast.makeText(MainActivity.this, " Copied ", Toast.LENGTH_SHORT).show();
                break;
            case R.id.menu_collect:
                Toast.makeText(MainActivity.this," Have collected ",Toast.LENGTH_SHORT).show();
                break;
        }
        return true;
    }
}

GitHub - hanyuhang-hz/android-demos