Android 如何在上下文菜单中创建弹出菜单?
我想为上下文菜单创建一个弹出菜单,这样当我长按上下文菜单时,它会显示另一个弹出菜单 这是我为上下文菜单编写的代码Android 如何在上下文菜单中创建弹出菜单?,android,android-studio,kotlin,Android,Android Studio,Kotlin,我想为上下文菜单创建一个弹出菜单,这样当我长按上下文菜单时,它会显示另一个弹出菜单 这是我为上下文菜单编写的代码 override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val button = findViewById<Button>(R.id.btn)
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val button = findViewById<Button>(R.id.btn)
registerForContextMenu(button)
}
override fun onCreateContextMenu(menu: ContextMenu?, v: View?, menuInfo: ContextMenu.ContextMenuInfo?) {
super.onCreateContextMenu(menu, v, menuInfo)
menu?.setHeaderTitle("Choose one")
menu?.add(0, v?.getId()!!, 0, "Upload")
menu?.add(0, v?.getId()!!, 0, "Search")
menu?.add(0, v?.getId()!!, 0, "Share")
}
override fun onContextItemSelected(item: MenuItem): Boolean {
return super.onContextItemSelected(item)
}
override-fun-onCreate(savedInstanceState:Bundle?){
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val按钮=findViewById(R.id.btn)
registerForContextMenu(按钮)
}
在CreateContextMenu(菜单:ContextMenu?、v:View?、menuInfo:ContextMenu.ContextMenuInfo?)上覆盖乐趣{
super.onCreateContextMenu(menu,v,menuInfo)
菜单?.setHeaderTitle(“选择一个”)
菜单?.add(0,v?.getId()!!,0,“上载”)
菜单?.add(0,v?.getId()!!,0,“搜索”)
菜单?.add(0,v?.getId()!!,0,“共享”)
}
覆盖onContextItemSelected(项:MenuItem):布尔值{
返回super.onContextItemSelected(项)
}
您可能希望使用该方法将子菜单对象添加到菜单中。
如果您想更深入地了解菜单创建内容,请参考创建菜单。在Java中,当我长按按钮时,它显示上下文菜单,然后我选择上下文菜单,它显示弹出菜单
Button button = findViewById(R.id.button);
registerForContextMenu(button);
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
menu.setHeaderTitle("Context Menu");
menu.add(0, v.getId(), 0, "Upload");
menu.add(0, v.getId(), 0, "Search");
menu.add(0, v.getId(), 0, "Share");
menu.add(0, v.getId(), 0, "Bookmark");
}
@Override
public boolean onContextItemSelected(MenuItem item) {
super.onContextItemSelected(item);
try {
showPopup(findViewById(item.getItemId()));
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
private void showPopup(View anchorView) {
PopupMenu popup = new PopupMenu(this, anchorView);
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
Toast.makeText(MapsActivity.this, "Selected Item: "
+ item.getTitle(), Toast.LENGTH_SHORT).show();
return true;
}
});
popup.inflate(R.menu.menu_example);
popup.show();
}