Android导航视图点击监听器不工作

Question

我用向导创建了"活动"。我删除了我不感兴趣的内容，例如浮动动作按钮。

在activity_main_drawer.xml中创建了我的自定义项目

向导创建了onNavigationItemSelected函数(请参阅下面的代码)，我添加了代码，因此它退出活动并返回登录屏幕。

所以我不知道为什么，我在logcat中没有看到任何有趣的东西，所以这是一个逻辑问题。我是个新手，导航视图让我很害怕如果我错过了你需要的东西，请告诉我

package com.skrefi.googleplaycopy;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
import com.google.firebase.auth.FirebaseAuth;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private FirebaseAuth firebaseAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
firebaseAuth = FirebaseAuth.getInstance();
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}

//Don't know what this is
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
//Don't know what this is either
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
//In case I need it for the admin activity >> the 3 dots pop down thingy <<
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
MakeToast("SOMETHING");
switch (item.getItemId()){
case R.id.action_settings:
MakeToast("Settings button clicked");
return true;
}
return super.onOptionsItemSelected(item);
}

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
switch(item.getItemId()){
case R.id.item_signout:
firebaseAuth.getInstance().signOut();
MakeToast("Signed out!");
finish();
startActivity(new Intent(MainActivity.this, LoginActivity.class));
break;
}
//DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
//drawer.closeDrawer(GravityCompat.START);
return true;
}
public void MakeToast(String text) {
Toast.makeText(this, text, Toast.LENGTH_LONG).show();
}
}

编辑：

因此，如果我将可见性设置为gone，并且我可以在这个布局文件中使用我想要的布局，这可能会令人困惑，因为我得到的屏幕没有工具栏，这就是我想要的。我想把它也保留在管理部分，以便稍后检查用户是否是我，如果是，我在抽屉里得到一个名为"管理活动"的新项目，它只需将东西的可见性设置为visible，就可以获得管理屏幕。

以下是您(@)的要求：

<?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"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<!--This is for a potential admin screen-->
<include
android:id="@+id/include_toolbar_with_threedots_settings"
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />
<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"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
<android.support.constraint.ConstraintLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is for test"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.DrawerLayout>

Answer 1

您在实际开始活动之前调用finish()，而应该在开始登录活动之后调用它。以下代码将启动Login活动并关闭Main活动。

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
switch(item.getItemId()){
case R.id.item_signout:
firebaseAuth.getInstance().signOut();
MakeToast("Signed out!");
startActivity(new Intent(MainActivity.this, LoginActivity.class));
finish();
break;
}
//DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
//drawer.closeDrawer(GravityCompat.START);
return true;
}