java - 如何从选择了上下文菜单选项的 View 中获取？

Question

在我的应用程序中，我动态创建了一些 View ，并且所有 View 都注册了相同的上下文菜单。

for(int j = 0; j < CELLS_IN_ROW; j++) {
    MyView v = new MyView();
    ((Activity) context).registerForContextMenu(v);
}
/* ----------------------------------------------- */


    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);

    MenuInflater menuInflater = getMenuInflater();
    menuInflater.inflate(R.menu.cell_context_menu, menu);
}

    @Override
    public boolean onContextItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.myOption:
            MyView viewClicked = ?????

            doSomethingDependingOnView(viewClicked);
            return true;

        default:
            return super.onContextItemSelected(item);
    }
}

但是当单击菜单选项时，我想根据单击哪个 View 来打开上下文菜单来执行不同的操作。我该怎么做？

Answer 1

由于其参数 view，当您的 onCreateContextMenu 启动时，您拥有对 clickedView 的引用。

onCreateContextMenu(ContextMenu cM， View view，ContextMenuInfo cMI)

所以你必须在你的 Activity (或 fragment )中声明一些 View 变量， 然后你应该在 onCreateContextMenu 中初始化那个，最后你可以在 onContextItemSelected 中使用它

MyView viewClicked;

@Override
public void onCreateContextMenu(ContextMenu menu, 
                           View view, // this is your clicked view
                           ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);

MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.cell_context_menu, menu);
viewClicked = view; // <---!!!

@Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
    case R.id.myOption:

        viewClicked.someMethod();

        doSomethingDependingOnView(viewClicked);
        return true;
    default:
        return super.onContextItemSelected(item);
}