我将为我的一个项目实现导航抽屉。我能够实现同样的目标。但是导航抽屉有一些滞后。请建议。here is the image
以下是我的代码
Home_activity.xml
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="@drawable/image_login">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
<RelativeLayout
android:id="@+id/searchBox"
android:layout_width="match_parent"
android:layout_height="45dp"
android:layout_below="@+id/toolbar"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="10dp"
android:background="#ffffff">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:text="Search a Property"
android:textColor="#b8bcc0"
android:textSize="14sp" />
<ImageView
android:id="@+id/imageView"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:src="@drawable/icon_search" />
</RelativeLayout>
<RelativeLayout
android:id="@+id/box"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/searchBox"
android:gravity="center">
<ImageView
android:id="@+id/buyRentImage"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_marginBottom="2dp"
android:layout_marginRight="1dp"
android:src="@drawable/image_buy_rent" />
<ImageView
android:id="@+id/applyLoanImage"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_marginRight="3dp"
android:layout_toRightOf="@+id/buyRentImage"
android:src="@drawable/image_apply_for_loan" />
<ImageView
android:id="@+id/newProjectImage"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_marginRight="1dp"
android:layout_below="@+id/buyRentImage"
android:src="@drawable/image_new_projects" />
<ImageView
android:id="@+id/postPropertyImage"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_marginRight="3dp"
android:layout_below="@+id/buyRentImage"
android:layout_toRightOf="@+id/newProjectImage"
android:src="@drawable/image_post_my_property" />
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="70dp">
<RelativeLayout
android:id="@+id/homeiconImage"
android:layout_width="55dp"
android:layout_height="55dp"
android:layout_marginLeft="20dp"
android:layout_centerVertical="true"
android:background="@drawable/circle_blue"
android:gravity="center">
<ImageView
android:layout_width="30dp"
android:layout_height="30dp"
android:src="@drawable/icon_verified_property" />
</RelativeLayout>
<TextView
android:id="@+id/totalProperty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="25dp"
android:layout_marginTop="10dp"
android:layout_toRightOf="@id/homeiconImage"
android:text="300+"
android:textColor="#008dd5"
android:textSize="20sp"
android:textStyle="bold" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/totalProperty"
android:layout_marginLeft="25dp"
android:layout_toRightOf="@id/homeiconImage"
android:text="VARIFIED PROPERTIES"
android:textColor="#3d3e40"
android:textSize="16sp" />
<ImageView
android:layout_width="35dp"
android:layout_height="35dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="4dp"
android:src="@drawable/icon_next" />
</RelativeLayout>
<View
android:layout_width="match_parent"
android:layout_height="5dp"
android:layout_alignParentBottom="true"
android:background="#008dd5" />
</LinearLayout>
<fragment
android:id="@+id/fragment_navigation_drawer"
android:name="com.androidmobile.thanehomes.thanehomes.activities.home.NavigationFragment"
android:layout_width="@dimen/nav_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
tools:layout="@layout/fragment_navigation" />
Home.java
public class Home extends AppCompatActivity implements NavigationFragment.FragmentDrawerListener {
Toolbar toolbar;
RelativeLayout box, searchBox;
ImageView buyRentImg, applyLoanImg, newProjectImg, postProjectImg;
TextView buyRentTxt, postPropertyTxt;
Menu myMenu;
int settleCount;
private NavigationFragment drawerFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
settleCount = 1;
toolbar = (Toolbar) findViewById(R.id.toolbar);
searchBox = (RelativeLayout) findViewById(R.id.searchBox);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle(" Thanehomes");
getSupportActionBar().setIcon(R.drawable.ic_logo);
box = (RelativeLayout) findViewById(R.id.box);
box.setRotation(45.0f);
searchBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent searchIntent = new Intent(Home.this, SearchProperty.class);
startActivity(searchIntent);
}
});
drawerFragment = (NavigationFragment)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawerLayout), toolbar);
drawerFragment.setDrawerListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
myMenu = menu;
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.home_menu, menu);
MenuItem item = myMenu.findItem(R.id.notification);
MenuItemCompat.setActionView(item, R.layout.update_count);
View count = myMenu.findItem(R.id.notification).getActionView();
TextView t = (TextView) count.findViewById(R.id.count);
if (settleCount < 1) {
t.setVisibility(View.GONE);
} else {
t.setVisibility(View.VISIBLE);
t.setText("" + settleCount);
}
count.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Toast.makeText(getApplicationContext(), "Click", Toast.LENGTH_SHORT).show();
Intent notificationIntent = new Intent(Home.this, NotificationList.class);
startActivity(notificationIntent);
}
});
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onDrawerItemSelected(View view, int position) {
Toast.makeText(getApplicationContext(), position + "", Toast.LENGTH_SHORT).show();
}
}
NavigationFragment.java
public class NavigationFragment extends Fragment {
private static String TAG = NavigationFragment.class.getSimpleName();
private RecyclerView recyclerView;
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private NavigationDrawerAdapter adapter;
private View containerView;
private static String[] titles = null;
private FragmentDrawerListener drawerListener;
public NavigationFragment() {
}
public void setDrawerListener(FragmentDrawerListener listener) {
this.drawerListener = listener;
}
public static List<NavDrawerItem> getData() {
List<NavDrawerItem> data = new ArrayList<>();
// preparing navigation drawer items
for (int i = 0; i < titles.length; i++) {
NavDrawerItem navItem = new NavDrawerItem();
navItem.setTitle(titles[i]);
data.add(navItem);
}
return data;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// drawer labels
titles = getActivity().getResources().getStringArray(R.array.nav_drawer_labels);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflating view layout
View layout = inflater.inflate(R.layout.fragment_navigation, container, false);
recyclerView = (RecyclerView) layout.findViewById(R.id.drawerList);
adapter = new NavigationDrawerAdapter(getActivity(), getData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getActivity(), recyclerView, new ClickListener() {
@Override
public void onClick(View view, int position) {
drawerListener.onDrawerItemSelected(view, position);
mDrawerLayout.closeDrawer(containerView);
}
@Override
public void onLongClick(View view, int position) {
}
}));
return layout;
}
public void setUp(int fragmentId, DrawerLayout drawerLayout, final Toolbar toolbar) {
containerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) {
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getActivity().invalidateOptionsMenu();
}
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
getActivity().invalidateOptionsMenu();
}
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
super.onDrawerSlide(drawerView, slideOffset);
toolbar.setAlpha(1 - slideOffset / 2);
}
};
mDrawerLayout.addDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
}
});
}
public static interface ClickListener {
public void onClick(View view, int position);
public void onLongClick(View view, int position);
}
static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
@Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildAdapterPosition(child));
}
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildPosition(child));
}
return false;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
public interface FragmentDrawerListener {
public void onDrawerItemSelected(View view, int position);
}
}
答案 0 :(得分：0)
如果导航抽屉在打开时滞后，则意味着您在导航抽屉中进行了一些资源密集型工作。
如果它在关闭时滞后意味着您通过导航抽屉显示的片段花费的时间比导航关闭时间要长，以便绘制自己。
您的问题是您在通过导航抽屉打开的片段中执行了一些繁重的任务。
答案 1 :(得分：0)
不完全确定但是当我定义 support-screens 并且它在屏幕兼容模式下运行时，由于某种原因我在导航抽屉上遇到滞后问题。
然而，这似乎是由 ActionBarDrawerToggle 更新汉堡菜单图标引起的。
当您提供 onDrawerSlide
的空实现（supress也称超级调用）时，您是否可以检查问题是否消失@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
}
如果看起来更好，您可以尝试在单独的线程中执行该操作（如果您需要此UI功能）。