Question

我有一个DrawerLayout，当我第一次滑动它时，它会逐步进入（如滞后或类似的东西），但之后它会移动得很好。我不知道要发布什么代码，因为我说它工作正常，只有我第一次打开它时，它才能顺利打开。

这是我的布局：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout

    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/DrawerLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:elevation="7dp">

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        tools:context="name.company.newapp.HomeScreen"
        tools:showIn="@layout/activity_home_screen">

        <FrameLayout
            android:id="@+id/your_placeholder"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

    </RelativeLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/RecyclerView"
        android:layout_width="320dp"
        android:layout_height="match_parent"
        android:layout_gravity="left"

        android:background="#ffffff"
        android:scrollbars="vertical">

    </android.support.v7.widget.RecyclerView>

</android.support.v4.widget.DrawerLayout>

onCreate方法

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home_screen);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
 mRecyclerView = (RecyclerView) findViewById(R.id.RecyclerView); // Assigning the RecyclerView Object to the xml View

        LinearLayoutManager mLayoutManager = new LinearLayoutManager(this);
        mLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);


        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

        mAdapter = new MyDrawerAdapter(TITLES,ICONS,NAME,EMAIL,PROFILE,this);

        mRecyclerView.setAdapter(mAdapter);                              // Setting the adapter to RecyclerView

        mRecyclerView.setHasFixedSize(true);                            // Letting the system know that the list objects are of fixed size

final GestureDetector mGestureDetector = new GestureDetector(HomeScreen.this, new GestureDetector.SimpleOnGestureListener() {

            @Override public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }

        });


        mRecyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
            @Override
            public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) {
                View child = recyclerView.findChildViewUnder(motionEvent.getX(), motionEvent.getY());


                if (child != null && mGestureDetector.onTouchEvent(motionEvent)) {

                    switch(recyclerView.getChildAdapterPosition(child)){
                        case 1:setFragment(new PreferencesFragment());
                            break;
                        default:
                            Toast.makeText(HomeScreen.this, "The Item Clicked is: " + recyclerView.getChildAdapterPosition(child), Toast.LENGTH_SHORT).show();
                    }
                    Drawer.closeDrawers();

                    return true;

                }

                return false;
            }

            @Override
            public void onTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) {

            }

            @Override
            public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

            }
        });


        Drawer = (DrawerLayout) findViewById(R.id.DrawerLayout);        // Drawer object Assigned to the view
        mDrawerToggle = new ActionBarDrawerToggle(this,Drawer,toolbar,R.string.navigation_drawer_open,R.string.navigation_drawer_close){

            @Override
            public void onDrawerOpened(View drawerView) {
                super.onDrawerOpened(drawerView);
                // code here will execute once the drawer is opened( As I dont want anything happened whe drawer is
                // open I am not going to put anything here)
            }

            @Override
            public void onDrawerClosed(View drawerView) {
                super.onDrawerClosed(drawerView);
                // Code here will execute once drawer is closed
            }



        }; // Drawer Toggle Object Made
        Drawer.setDrawerListener(mDrawerToggle); // Drawer Listener set to the Drawer toggle
        mDrawerToggle.syncState();               // Finally we set the drawer toggle sync State

}

编辑：我可能在Why does DrawerLayout sometimes glitch upon opening?找到了解决方案，但我不知道如何在我的代码中实现它。

Answer 1

也许您的问题也是由于导航视图标题中图像的大小。

看看这个： NavigationView slow to open / Skipping frames (Android Design Lib)

DrawerLayout第一次打开了一些步骤

1 个答案: