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我正在尝试实现此处找到的循环浮动操作菜单，但是一旦我运行该应用程序，我就会收到此错误：

java.lang.IllegalStateException：指定的孩子已经有一个父母。您必须首先在孩子的父母上调用 removeView()。

我对 Android 材料设计和实现自定义动画等非常陌生。我见过与此类似的问题，但每个问题似乎都针对特定的上下文。

这是我的 OnCreate() 方法：

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        mNavigationDrawerFragment = (NavigationDrawerFragment)
                getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
        mTitle = getTitle();

        // Set up the drawer.
        mNavigationDrawerFragment.setUp(
                R.id.navigation_drawer,
                (DrawerLayout) findViewById(R.id.drawer_layout));

        ImageView icon = new ImageView(this); // Create an icon
        icon.setImageDrawable(getResources().getDrawable(R.drawable.abc_ic_search_api_mtrl_alpha));

        FloatingActionButton actionButton = new FloatingActionButton.Builder(this)
                .setContentView(icon)
                .build();

        SubActionButton.Builder itemBuilder = new SubActionButton.Builder(this);
        ImageView itemIcon1 = new ImageView(this);
        itemIcon1.setImageDrawable(getResources().getDrawable(R.drawable.abc_ic_search_api_mtrl_alpha));
        SubActionButton button1 = itemBuilder.setContentView(itemIcon1).build();
        ImageView itemIcon2 = new ImageView(this);
        itemIcon2.setImageDrawable(getResources().getDrawable(R.drawable.button_action_dark_touch));
        SubActionButton button2 = itemBuilder.setContentView(itemIcon2).build();
        ImageView itemIcon3 = new ImageView(this);
        itemIcon3.setImageDrawable(getResources().getDrawable(R.drawable.button_action_selector));
        SubActionButton button3 = itemBuilder.setContentView(itemIcon2).build();

        FloatingActionMenu actionMenu = new FloatingActionMenu.Builder(this)
                .addSubActionView(button1)
                .addSubActionView(button2)
                .addSubActionView(button3)
                .attachTo(actionButton)
                .build();
        setContentView(R.layout.activity_main);
    }
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1 回答 1

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ImageView itemIcon2 = new ImageView(this);
        itemIcon2.setImageDrawable(getResources().getDrawable(R.drawable.button_action_dark_touch));
        SubActionButton button2 = itemBuilder.setContentView(itemIcon2).build();
        ImageView itemIcon3 = new ImageView(this);
        itemIcon3.setImageDrawable(getResources().getDrawable(R.drawable.button_action_selector));
        SubActionButton button3 = itemBuilder.setContentView(itemIcon2).build();

itemBuilder.setContentView(itemIcon2)被调用两次：P 最后一行应该是itemIcon3

于 2015-03-25T00:56:45.357 回答