导航抽屉非常滞后

Question

我正在尝试打开导航抽屉，但抽屉太滞后了。不过我开Googleplay商店是正常的。我该如何改进？

这是我的布局：

    <LinearLayout
        android:background="@drawable/hhome1"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

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

        </FrameLayout>

    </LinearLayout>

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

    </android.support.design.widget.NavigationView>

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

这是我的代码我认为这会导致这部分滞后

    public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener{

    private DrawerLayout mDrawerlayout;
    private ActionBarDrawerToggle mToggle;
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mDrawerlayout = (DrawerLayout) findViewById(R.id.drawer);
    mToggle = new ActionBarDrawerToggle(this,mDrawerlayout,R.string.open,R.string.close);
    mDrawerlayout.addDrawerListener(mToggle);
    mToggle.syncState();
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    NavigationView navigationView = findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);

我试图简化这个getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new HomeFrament()).commit();但我不知道为什么它不起作用

public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        if (mDrawerlayout.isDrawerOpen(GravityCompat.START)) {
            mDrawerlayout.closeDrawers();
        }
        switch (item.getItemId()){
        case R.id.nav_home:
            getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                    new HomeFrament()).commit();
            break;
        case R.id.nav_control:
            getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                    new ControlFrament()).commit();
            break;
        case R.id.nav_settings:
            getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                    new SettingsFrament()).commit();
            break;
        case R.id.nav_tandh:
            getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                    new TandHFrament()).commit();
            break;
        case R.id.nav_logout:
            getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                    new LogoutFrament()).commit();
            break;
    }

}

有没有办法避免这种延迟？

Answer 1

try to change the images which you used in navigation drawer (in header)

or once remove background image then see :

<LinearLayout
        android:background="@drawable/hhome1"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

到

<LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

Answer 2

我认为问题是同时有 2 个操作在工作。 1是关闭抽屉，2是片段事务。

如果您检查了 google Play 商店或 Gmail。当您单击导航抽屉菜单项时，首先起作用的是通过将 alpha 设置为 0 来移除主屏幕中内容的可见性。然后在成功关闭抽屉后完成片段事务。

您将 ActionBarDrawerToggle 设置为监听 onDrawerClosed 和 onDrawerOpened 回调。

导航抽屉非常滞后

Navigation Drawer very lag

java

android

navigation-drawer