导航抽屉项单击不可用.之后的问题

Question

我在代码中使用了导航抽屉。当点击项目时，注意发生。从Stackoverflow和net中尝试了各种方法。

import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.view.GravityCompat;
import androidx.drawerlayout.widget.DrawerLayout;
import com.google.android.material.navigation.NavigationView;

public class searchActivity extends AppCompatActivity implements 
NavigationView.OnNavigationItemSelectedListener {
public DrawerLayout drawerLayout;
public ActionBarDrawerToggle actionBarDrawerToggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
drawerLayout=findViewById(R.id.drawer_layout);
actionBarDrawerToggle=new 
ActionBarDrawerToggle(this,drawerLayout,R.string.open_drawer,R.string.close_drawer);
drawerLayout.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.syncState();
NavigationView navigationView=(NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
navigationView.bringToFront();
drawerLayout.requestLayout();
}
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item)
{
DrawerLayout drawerLayout=(DrawerLayout) findViewById(R.id.drawer_layout);
if(drawerLayout.isDrawerOpen(GravityCompat.START))
{
drawerLayout.closeDrawer(GravityCompat.START);
}
else {
drawerLayout.openDrawer(GravityCompat.START);
}
if(actionBarDrawerToggle.onOptionsItemSelected(item)){
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onNavigationItemSelected(MenuItem item)
{
Toast toast=Toast.makeText(searchActivity.this,"On navigation item 
selected",Toast.LENGTH_SHORT);
toast.show();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}

XML文件

<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
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_layout"
tools:context=".searchActivity">

<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="@+id/search_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#FFEB3B"
android:text="@string/add"
android:textColor="#BF360C"
app:layout_constraintBottom_toTopOf="@+id/food_listview"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.413"
app:layout_constraintStart_toEndOf="@+id/search_box"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.552" />
<com.google.android.material.textfield.TextInputEditText
android:id="@+id/search_box"
android:layout_width="289dp"
android:layout_height="81dp"
android:hint="@string/type_food"
android:textColorHint="#757575"
app:layout_constraintBottom_toTopOf="@+id/food_listview"
app:layout_constraintEnd_toStartOf="@+id/search_button"
app:layout_constraintHorizontal_bias="0.432"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ListView
android:id="@+id/food_listview"
android:layout_width="357dp"
android:layout_height="496dp"
android:layout_marginBottom="44dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:menu="@menu/navigation_menu"/>
</androidx.drawerlayout.widget.DrawerLayout>

正如许多人建议的那样，也将navigationView放在xml的最后。仍然没有帮助。做了很多改变。正如许多人建议的那样，我们也把navigationView放在了xml的最后。还是没用

Answer 1

Check this answer:

search_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical">

<androidx.drawerlayout.widget.DrawerLayout
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="false"
tools:openDrawer="start">

<include
layout="@layout/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />

<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="@dimen/_240sdp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="@color/white_color"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_drawer"
app:menu="@menu/drawer_menu"/>

</androidx.drawerlayout.widget.DrawerLayout>

</LinearLayout>

SearchActivity.java

public class SearchActivity extends AppCompatActivity implements  NavigationView.OnNavigationItemSelectedListener{

DrawerLayout drawer;
NavigationView navigationView;


@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search_activity);

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Home");
toolbar.setTitleTextColor(getResources().getColor(android.R.color.white));

drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
navigationView = (NavigationView) findViewById(R.id.nav_view);
View hView = navigationView.getHeaderView(0);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
toggle.syncState();
toggle.getDrawerArrowDrawable().setColor(getResources().getColor(R.color.white_color));
navigationView.setNavigationItemSelectedListener(this);
navigationView.setItemIconTintList(null);
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.nav_home:
Intent home = new Intent(SearchActivity.this, Your_Acivity.class); //here place your Activity Class
startActivity(home);
break;
case R.id.nav_car_info:
Intent car_info = new Intent(SearchActivity.this,Your_Activity.class);  //here place your Activity Class
startActivity(car_info);
break;

}
return false;
}
}

Answer 2

添加到上面。我在onCreate()和onResume()中调用了setContentView()。我删除了后者。它运行良好。