Question

我想在导航视图中使用Array for Menu项。我在左侧创建了我的菜单。但是，当我点击项目时，我想显示项目的名称。但这是一个错误。我尝试使用另一个变量。（例如我确定一个变量而不是“i”喜欢（int counter）“但是它给出了一个像以前一样的错误。”

感谢您的帮助。谢谢。

  <div class="carousel slide" id="spinner" data-ride="carousel">
  <ol class="carousel-indicators">
    <li class="active" data-target="#spinner" data-slide-to="0"></li>
    <li data-target="#spinner" data-slide-to="1"></li>
    <li data-target="#spinner" data-slide-to="2"></li>
  </ol>
  <div class="carousel-inner" role="listbox">
    <div class="item active"><img src="http://placehold.it/600x300"></div>
    <div class="item"><img src="http://placehold.it/600x300"></div>
    <div class="item"><img src="http://placehold.it/600x300"></div>
  </div>
  <a class="left carousel-control" href="#spinner" role="button" data-slide="prev">
  <span class="icon-prev" aria-hidden="true">
  </span><span class="sr-only">Previous</span>
  </a>
  <a class="right carousel-control" href="#spinner" role="button" data-slide="next">
  <span class="icon-next" aria-hidden="true">
  <span class="sr-only">Next</span></span></a>
    </div>

这里的数组代码

/AndroidRuntime: FATAL EXCEPTION: main
              Process: com.technotalkative.navigationviewdemo, PID: 28374
              java.lang.ArrayIndexOutOfBoundsException: length=4; index=4
                  at com.technotalkative.navigationviewdemo.MainActivity$3.onMenuItemClick(MainActivity.java:290)
                  at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:148)
                  at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:957)
                  at android.support.design.internal.NavigationMenuPresenter$1.onClick(NavigationMenuPresenter.java:318)
                  at android.view.View.performClick(View.java:5198)
                  at android.view.View$PerformClick.run(View.java:21147)
                  at android.os.Handler.handleCallback(Handler.java:739)
                  at android.os.Handler.dispatchMessage(Handler.java:95)
                  at android.os.Looper.loop(Looper.java:148)
                  at android.app.ActivityThread.main(ActivityThread.java:5417)
                  at java.lang.reflect.Method.invoke(Native Method)
                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)


    private int counter=0;
private void addItemsRunTime(NavigationView navigationView) {
    //adding items run time
    final Menu menu = navigationView.getMenu();
    for (int i = 0; i <= 3; i++) {
        counter=i;
        menu.add(0,i,0,i + bilgiler[i].toString());
        menu.findItem(i).setIcon(R.drawable.coins);
        menu.findItem(i).setCheckable(true); //Bu kod seçili kısmı tek bir seçenekli hale getiriyor.
        menu.findItem(i).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Toast.makeText(MainActivity.this,"Selam Tıkladığınız Butonun Adı" + bilgiler[counter].toString(),Toast.LENGTH_SHORT).show();
                counter++;
                return true;
            }
        });
    }
    final SubMenu subMenu = menu.addSubMenu("SubMenu Title");
    for (int i = 0; i < sayacim; i++) {
        subMenu.add(0,i,0,bilgiler[i].toString());
        subMenu.findItem(i).setIcon(R.drawable.resmim2);
    }

    for (int i = 0, count = mNavigationView.getChildCount(); i < count; i++) {
        final View child = mNavigationView.getChildAt(i);
        if (child != null && child instanceof ListView) {
            final ListView menuView = (ListView) child;
            final HeaderViewListAdapter adapter = (HeaderViewListAdapter) menuView.getAdapter();
            final BaseAdapter wrapped = (BaseAdapter) adapter.getWrappedAdapter();
            wrapped.notifyDataSetChanged();
        }
    }
}

Answer 1

问题是您正在尝试从内部类访问变量。解决方案：在该方法之前声明您的变量 -

public Integer i;
private void addItemsRunTime(...){
...
for (i = 0; ....){
}

}

编辑：

在你的toast中而不是biligiler [i] .toString（）写item.getTitle（）。toString（）或读取关于MenuItem：developer.android.com/reference/android/view/MenuItem.html

Answer 2

试试这样：

private int counter = 0;

for (int i = 0; i < x; i++) {
    //in interface
    ....bilgiger[counter]

   //at the end
   counter++;
}

导航视图项目操作错误

2 个答案: