Question

我正在开发一个Android应用，其中操作栏中有抽屉布局。我已经为drawerlayout添加了监听器，以便在抽屉打开或关闭时进行监听。抽屉布局附有导航视图。

现在可以通过各种方式打开和关闭抽屉：点击打开，滑动打开，滑动到关闭以及点击外部关闭。我必须添加事件来分别识别这些事件。

我已经以这种方式添加了drawerlayout和navigationview：

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">

<LinearLayout
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:orientation="vertical"
    >
    <include
        android:id="@+id/toolbar"
        layout="@layout/tool_bar"
    />
    <FrameLayout
        android:id="@+id/frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </FrameLayout>

</LinearLayout>

<android.support.design.widget.NavigationView
    android:id="@+id/navigation_view"
    android:layout_height="match_parent"
    android:layout_width="wrap_content"
    android:layout_gravity="start"
    app:headerLayout="@layout/header"
    app:menu="@menu/drawer"
    />

Noe在Activity中，我在navigationview和drawerlayout上添加了以下监听器。

//Setting Navigation View Item Selected Listener to handle the item click of the navigation menu
    navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {

        // This method will trigger on item Click of navigation menu
        @Override
        public boolean onNavigationItemSelected(MenuItem menuItem) {


            //Checking if the item is in checked state or not, if not make it in checked state
            if(menuItem.isChecked()) menuItem.setChecked(false);
            else menuItem.setChecked(true);

            //Closing drawer on item click
            drawerLayout.closeDrawers();

            //Check to see which item was being clicked and perform appropriate action
            switch (menuItem.getItemId()){

                 // Switch case identify different options

            }
        }
    });

    // Initializing Drawer Layout and ActionBarToggle
    drawerLayout = (DrawerLayout) findViewById(R.id.drawer);
    ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.openDrawer, R.string.closeDrawer){

        @Override
        public void onDrawerClosed(View drawerView) {
            // Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
            super.onDrawerClosed(drawerView);
        }

        @Override
        public void onDrawerOpened(View drawerView) {
            // Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank

            super.onDrawerOpened(drawerView);
        }
    };

    //Setting the actionbarToggle to drawer layout
    drawerLayout.setDrawerListener(actionBarDrawerToggle);

    //calling sync state is necessay or else your hamburger icon wont show up
    actionBarDrawerToggle.syncState();

现在onDrawerOpened和onDrawerClosed仅向我提供有关何时打开和关闭抽屉的信息。如何区分开放和关闭的交互？用于识别的交互：tap-to-open, swipe-to-open, swipe-to-close and tap-outside-to-close。

Answer 1

ActionBarDrawerToggle提供的不仅仅是onDrawerClosed，onDrawerOpened方法。您覆盖onDrawerSlide方法以检测幻灯片：

.. 
@Override
public void onDrawerSlide (View drawerView,float slideOffset){

   if(determine if openning or closing){
     doStuff();
   }else{
     doOtherStuff();
   }
}

可以通过覆盖Activity.onOptionsItemSelected(MenuItem item)方法来检测工具栏上的点按。然后检查该项是否具有ID android.R.id.home。

在此处阅读更多内容：https://developer.android.com/reference/android/support/v7/app/ActionBarDrawerToggle.html

Answer 2

我找到了一种方法，可以通过滑动，使用一些现有参数和编写不同的方法来准确确定抽屉是否已打开：

        @Override
        public void onDrawerStateChanged(int newState) {

            if (newState == DrawerLayout.STATE_DRAGGING) {

                if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
                    // drawer is currently open and is being closed by sliding
                } else {
                    // drawer is currently closed and is being opened by sliding
                }
            }
        }

一旦我知道，我会添加正确检测点击事件。如果有人知道，请发表评论。

Android汉堡菜单交互

2 个答案: