Android中的菜单有如下几种：
OptionMenu：选项菜单，android中最常见的菜单，通过Menu键来调用
SubMenu：子菜单，android中点击子菜单将弹出一个显示子菜单项的悬浮框， 子菜单不支持嵌套，即不能包括其他子菜单
ContextMenu：上下文菜单，通过长按某个视图组件后出现的菜单，该组件需注册上下文菜单
OptionMenu：
public boolean onCreateOptionsMenu(Menu menu)：调用OptionMenu，在这里完成菜单初始化
public boolean onOptionsItemSelected(MenuItem item)：菜单项被选中时触发，这里完成事件处理
public void onOptionsMenuClosed(Menu menu)：菜单关闭会调用该方法
public boolean onPrepareOptionsMenu(Menu menu)：选项菜单显示前会调用该方法， 可在这里进行菜单的调整(动态加载菜单列表)
public boolean onMenuOpened(int featureId, Menu menu)：选项菜单打开以后会调用这个方法
加载菜单的方式有两种，一种是直接通过编写菜单XML文件，然后调用： getMenuInflater().inflate(R.menu.menu_main, menu);加载菜单
或者通过代码动态添加，onCreateOptionsMenu的参数menu，调用add方法添加 菜单，add(菜单项的组号，ID，排序号，标题)，另外如果排序号是按添加顺序排序的话都填0即可
public class MainActivity extends AppCompatActivity {
//1.定义不同颜色的菜单项的标识:
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,"红色");
menu.add(1,GREEN,2,"绿色");
menu.add(1,BLUE,3,"蓝色");
menu.add(1,YELLOW,1,"黄色");
menu.add(1,GRAY,5,"灰色");
menu.add(1,CYAN,6,"蓝绿色");
menu.add(1,BLACK,7,"黑色");
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);
}}
ContextMenu
重写onCreateContextMenu()方法、为view组件注册上下文菜单，使用registerForContextMenu()方法,参数是View、重写onContextItemSelected()方法为菜单项指定事件监听器
menu_context.xml：
<?xml version="1.0" encoding="utf-8"?><menu xmlns:android="http://schemas.android.com/apk/res/android">
<!-- 定义一组单选按钮 -->
<!-- checkableBehavior的可选值由三个：single设置为单选，all为多选，none为普通选项 -->
<group android:checkableBehavior="none">
<item android:id="@+id/blue" android:title="@string/font_blue"/>
<item android:id="@+id/green" android:title="@string/font_green"/>
<item android:id="@+id/red" android:title="@string/font_red"/>
</group></menu>
接着我们在选项菜单的那个基础上，添加一个TextView，然后加上下面一些东西：
private TextView tv_context;
tv_context = (TextView) findViewById(R.id.tv_context);
registerForContextMenu(tv_context);
//重写与ContextMenu相关方法
@Override
//重写上下文菜单的创建方法
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);
}
//上下文菜单被点击是触发该方法
@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;
}
SubMenu(子菜单)
所谓的子菜单只是在<**item**>中又嵌套了一层<**menu**>而已
<?xml version="1.0" encoding="utf-8"?><menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/submenu" android:title="子菜单使用演示~">
<menu>
<group android:checkableBehavior = "none">
<item android:id="@+id/one" android:title = "子菜单一"/>
<item android:id="@+id/two" android:title = "子菜单二"/>
<item android:id="@+id/three" android:title = "子菜单三"/>
</group>
</menu>
</item></menu>
接着我们改下上面上下文菜单的两个方法的内容，换上下面的代码：
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenu.ContextMenuInfo menuInfo) {
//子菜单部分：
MenuInflater inflator = new MenuInflater(this);
inflator.inflate(R.menu.menu_sub, menu);
super.onCreateContextMenu(menu, v, menuInfo);}
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.one:
Toast.makeText(MainActivity.this,"你点击了子菜单一",Toast.LENGTH_SHORT).show();
break;
case R.id.two:
item.setCheckable(true);
Toast.makeText(MainActivity.this,"你点击了子菜单二",Toast.LENGTH_SHORT).show();
break;
case R.id.three:
Toast.makeText(MainActivity.this,"你点击了子菜单三",Toast.LENGTH_SHORT).show();
item.setCheckable(true);
break;
}
return true;}
Popupmenu见https://www.cnblogs.com/XiaoGao128/p/12240792.html
参考资料：菜鸟教程