这是问题所在，我希望我的导航抽屉（汉堡图标）仅出现在某些片段中。就我而言，我有3个fragment，使用tab layout和view pager在fragment之间切换。我已经实现了一个我创建的interface。但是当我设置为true时，所有fragment中都会出现汉堡图标。我不知道我的代码在哪里。
mainactivity代码：
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.graphics.Typeface;
import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.design.widget.TabLayout;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.Toolbar;
import android.text.Spannable;
import android.text.SpannableString;
import android.view.Gravity;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import emptrack.toro.developer.com.emptrack.FastScroll.AlphabetItem;
import emptrack.toro.developer.com.emptrack.FastScroll.DataHelper;
import emptrack.toro.developer.com.emptrack.FastScroll.VendorAdapter;
import in.myinnos.alphabetsindexfastscrollrecycler.IndexFastScrollRecyclerView;
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, DrawerLocker{
private View view_menu, view_click, view_list;
private ImageView btn_arrow_back;
private TabLayout tabLayout;
private ViewPager viewPager;
private ViewPagerAdapter adapter;
private Bundle intentFragment;
private String frag;
private ArrayList<ListPegawai> dataBaru;
private Bundle dapatData;
String PREFERENCES_FILE_NAME = "preference_diri";
SharedPreferences dataDiri, retrieveData;
//Untuk filtering
private List<String> mDataArray;
//Side bar
private DrawerLayout drawer;
ActionBarDrawerToggle toggle;
Toolbar toolbar;
private List<AlphabetItem> mAlphabetItems;
private IndexFastScrollRecyclerView mRecyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Filtering
mRecyclerView = findViewById(R.id.fast_scroller_recycler);
mDataArray = new ArrayList<String>();
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//ganti ActionBar font
SpannableString s = new SpannableString("EmpTrack");
s.setSpan(new TypefaceSpan(this, "raleway_semibold.ttf"), 0, s.length(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
ActionBar actionBar = getSupportActionBar();
actionBar.setElevation(0);
actionBar.setTitle(s);
tabLayout = (TabLayout) findViewById(R.id.tabLayout);
viewPager = (ViewPager) findViewById(R.id.viewPager);
adapter = new ViewPagerAdapter(getSupportFragmentManager());
dataDiri = getSharedPreferences(PREFERENCES_FILE_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = dataDiri.edit();
adapter.addFragment(new FragmentNews(), "News");
adapter.addFragment(new FragmentTracking(), "Tracking");
adapter.addFragment(new FragmentSettings(), "Settings");
viewPager.setOffscreenPageLimit(3);
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
//Init layout
view_menu = (View) findViewById(R.id.menu_layout);
view_list = (View) findViewById(R.id.list_vendor2);
view_click = (View) findViewById(R.id.click_vendor);
btn_arrow_back = (ImageView) findViewById(R.id.arrow_back);
//Untuk sidebar
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
//Init filtering
initialiseData();
initialiseUI();
tabLayout.getTabAt(0).setIcon(R.drawable.ic_news);
tabLayout.getTabAt(1).setIcon(R.drawable.ic_tracking);
tabLayout.getTabAt(2).setIcon(R.drawable.ic_settings);
actionBar.setElevation(0);
intentFragment = getIntent().getExtras();
if (intentFragment != null) {
frag = intentFragment.getString("LoadFragment");
switch (frag) {
case "tracking":
viewPager.setCurrentItem(1, true);
break;
case "settings":
viewPager.setCurrentItem(2, true);
break;
}
}
//Fungsi click untuk sidebar
view_click.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
view_menu.setVisibility(View.GONE);
view_list.setVisibility(View.VISIBLE);
}
});
btn_arrow_back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
view_list.setVisibility(View.GONE);
view_menu.setVisibility(View.VISIBLE);
}
});
}
public void setActionBarTitle(String title) {
getSupportActionBar().setTitle(title);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
AlertDialog.Builder builder1 = new AlertDialog.Builder(MainActivity.this);
builder1.setTitle("Exit application");
builder1.setMessage("Are you sure you want to exit?");
builder1.setCancelable(true);
builder1.setPositiveButton(
"Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
}
});
builder1.setNegativeButton(
"No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert11 = builder1.create();
alert11.show();
}
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
return false;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(toggle.onOptionsItemSelected(item)){
return true;
}
else {
return super.onOptionsItemSelected(item);
}
}
protected void initialiseData() {
//Recycler view data
mDataArray = DataHelper.getAlphabetData();
//Alphabet fast scroller data
mAlphabetItems = new ArrayList<>();
List<String> strAlphabets = new ArrayList<>();
for (int i = 0; i < mDataArray.size(); i++) {
String name = mDataArray.get(i);
if (name == null || name.trim().isEmpty())
continue;
String word = name.substring(0, 1);
if (!strAlphabets.contains(word)) {
strAlphabets.add(word);
mAlphabetItems.add(new AlphabetItem(i, word, false));
}
}
}
protected void initialiseUI() {
Typeface typeface = Typeface.createFromAsset(this.getAssets(), "font/raleway_medium.ttf");
mRecyclerView.setTypeface(typeface);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.setAdapter(new VendorAdapter(mDataArray));
mRecyclerView.setIndexTextSize(14);
mRecyclerView.setIndexBarColor("#ffffff");
mRecyclerView.setIndexBarCornerRadius(0);
mRecyclerView.setIndexBarTransparentValue((float) 0.4);
mRecyclerView.setIndexbarMargin(0);
mRecyclerView.setIndexbarWidth(40);
mRecyclerView.setPreviewPadding(0);
mRecyclerView.setIndexBarTextColor("#000000");
// mRecyclerView.setPreviewTextSize(60);
// mRecyclerView.setPreviewColor("#33334c");
// mRecyclerView.setPreviewTextColor("#FFFFFF");
// mRecyclerView.setPreviewTransparentValue(0.6f);
mRecyclerView.setIndexBarVisibility(true);
mRecyclerView.setIndexbarHighLateTextColor("#000000");
mRecyclerView.setIndexBarHighLateTextVisibility(true);
}
@Override
public void setDrawerLocked(boolean shouldLock) {
if(shouldLock) {
drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
toggle.setDrawerIndicatorEnabled(true);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
else {
drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
toggle.setDrawerIndicatorEnabled(false);
}
}
}
这是fragment代码：
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.app.Fragment;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.SearchView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.LayoutAnimationController;
import android.view.animation.TranslateAnimation;
import android.widget.TextView;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;
import com.daimajia.swipe.util.Attributes;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import static android.content.Context.MODE_PRIVATE;
public class FragmentTracking extends Fragment implements Serializable, SearchView.OnQueryTextListener, SwipeRefreshLayout.OnRefreshListener, PegawaiItemClickListener {
private final String url = "https://opensource.petra.ac.id/~m26415177/getPegawai.php";
private JsonArrayRequest request;
private RequestQueue queue;
View v;
SwipeRefreshLayout swipeLayout;
private RecyclerView mRecyclerView;
private List<ListPegawai> pegawaiList;
FloatingActionButton buttonAdd;
SwipeRecyclerViewAdapter mAdapter;
SearchView search_view_bawah;
public static final String PREFERENCES_FILE_NAME = "preference_diri";
SharedPreferences dataDiri, retrieveData;
@SuppressLint("ResourceAsColor")
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
v = inflater.inflate(R.layout.tracking_fragment,container,false);
setHasOptionsMenu(true);
retrieveData = this.getActivity().getSharedPreferences(PREFERENCES_FILE_NAME, MODE_PRIVATE);
dataDiri = this.getActivity().getSharedPreferences(PREFERENCES_FILE_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = dataDiri.edit();
//((MainActivity) getActivity()).setDrawerLocked(true);
swipeLayout = (SwipeRefreshLayout) v.findViewById(R.id.container2);
swipeLayout.setOnRefreshListener(this);
swipeLayout.setColorSchemeColors(android.R.color.holo_green_dark,
android.R.color.holo_red_dark,
android.R.color.holo_blue_dark,
android.R.color.holo_orange_dark);
mRecyclerView = (RecyclerView) v.findViewById(R.id.recyclerView);
mAdapter = new SwipeRecyclerViewAdapter(getContext(), this);
mAdapter.setMode(Attributes.Mode.Single);
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
Log.e("RecyclerView", "onScrollStateChanged");
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
}
});
pegawaiList = new ArrayList<ListPegawai>();
buttonAdd = (FloatingActionButton)v.findViewById(R.id.buttonAdd);
buttonAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intentAdd = new Intent(getContext(), InsertEmployeeActivity.class);
startActivity(intentAdd);
getActivity().overridePendingTransition(R.anim.fadein,R.anim.fadeout);
getActivity().finish();
}
});
jsonRequest();
if (!isViewShown) {
animasiOn();
}
else {
}
return v;
}
private void animasiOn() {
mRecyclerView.setVisibility(View.INVISIBLE);
AnimationSet set = new AnimationSet(true);
Animation animation = new AlphaAnimation(0.0f, 1.0f);
animation.setDuration(500);
set.addAnimation(animation);
animation = new TranslateAnimation(
Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
Animation.RELATIVE_TO_SELF, -1.0f, Animation.RELATIVE_TO_SELF, 0.0f
);
animation.setDuration(100);
set.addAnimation(animation);
LayoutAnimationController controller = new LayoutAnimationController(set, 0.5f);
mRecyclerView.setLayoutAnimation(controller);
set.start();
mRecyclerView.setVisibility(View.VISIBLE);
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
pegawaiList = new ArrayList<ListPegawai>();
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.search_icon,menu);
MenuItem item = menu.findItem(R.id.search_all);
SearchView searchView = (SearchView) item.getActionView();
searchView.setOnQueryTextListener(this);
}
@Override
public boolean onQueryTextSubmit(String s) {
return false;
}
@Override
public boolean onQueryTextChange(String s) {
// String userInput = s.toLowerCase();
// List<ListPegawai> newList = new ArrayList<ListPegawai>();
//
// for(ListPegawai name:mDataSet){
// if(name.getNama().toLowerCase().contains(userInput)){
// newList.add(name);
// }
// }
//
// mAdapter.updateList(newList);
return true;
}
private boolean isViewShown = false;
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (getView() != null) {
isViewShown = true;
// fetchdata() contains logic to show data when page is selected mostly asynctask to fill the data
if (isVisibleToUser) {
animasiOn();
}
else {
mRecyclerView.setVisibility(View.INVISIBLE);
}
} else {
isViewShown = false;
}
}
@Override
public void onRefresh() {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
animasiOn();
mAdapter.setPegawaiList(pegawaiList);
swipeLayout.setRefreshing(false);
pegawaiList = new ArrayList<ListPegawai>();
jsonRequest();
}
}, 750);
}
private void jsonRequest() {
request = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
JSONObject jsonObject = null;
for (int i = 0; i < response.length(); i++) {
try {
Log.d("LENGTH",String.valueOf(response.length()));
jsonObject = response.getJSONObject(i);
ListPegawai pegawai = new ListPegawai();
pegawai.setNama(jsonObject.getString("nama"));
pegawai.setNik(jsonObject.getString("nik"));
pegawai.setAlamat(jsonObject.getString("alamat"));
pegawai.setTanggal(jsonObject.getString("tanggal_kejadian"));
pegawai.setJenisKelamin(jsonObject.getString("jenis_kelamin"));
pegawai.setKeluhanPegawai(jsonObject.getString("keluhan"));
pegawaiList.add(pegawai);
} catch (JSONException e) {
e.printStackTrace();
}
}
setuprecyclerview(pegawaiList);
mAdapter.setPegawaiList(pegawaiList);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}
);
queue = Volley.newRequestQueue(getContext());
queue.add(request);
}
private void setuprecyclerview(List<ListPegawai> pegawaiList) {
mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
mRecyclerView.addItemDecoration(new DividerItemDecoration(mRecyclerView.getContext(), LinearLayoutManager.VERTICAL));
mRecyclerView.setAdapter(mAdapter);
Log.d("KUDA","KUDANS");
}
@Override
public void onPegawaiItemClick(int pos, ListPegawai pegawaiList) {
}
@Override
public void onDestroyView() {
super.onDestroyView();
((MainActivity) getActivity()).setDrawerLocked(false);
}
}
当我设置此代码((MainActivity) getActivity()).setDrawerLocked(true);时，所有fragment中都会出现汉堡图标。但是，当我对其进行评论时，该图标并未出现在所有fragment
这里是XML代码，以防万一我的错误：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"
android:fitsSystemWindows="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main2"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<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="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
tools:context="emptrack.toro.developer.com.emptrack.MainActivity">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="@color/colorPrimary"
app:tabGravity="fill"
app:tabIconTint="#FFFFFF"
app:tabIndicatorColor="#FFFFFF"
app:tabMode="fixed"
app:tabTextAppearance="@style/tab_text"
app:tabTextColor="#FFFFFF"></android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@id/tabLayout" />
</RelativeLayout>
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true"
android:orientation="vertical"
android:paddingTop="0dp">
<include
android:id="@+id/menu_layout"
layout="@layout/list_menu" />
<include
android:id="@+id/list_vendor2"
layout="@layout/list_vendor"
android:visibility="gone" />
</LinearLayout>
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
请要求更详细，谢谢
答案 0 :(得分：0)
只需添加标签Layout即可更改监听器，并根据需要隐藏和显示图标。
答案 1 :(得分：0)
导航处于隐藏模式，将其更改为可见。.它将起作用