How to switch between Fragments in default Android Studio Navigation Drawer

How to switch between Fragments in default Android Studio Navigation Drawer - java

I have a Problem with switching Fragments in the default Navigation Drawer
MainActivity.java
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.app.Fragment;
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.view.View;
package flo.nawigator;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "HILFE:" +
" An der oberen linken Ecke, findest Du Drei Striche mit dem sich ein Menü öffnen lässt", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
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.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#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;
}
#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.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
Fragment fragment;
if (id == R.id.nav_gallery) {
} else if (id == R.id.Experimente) {
} else if (id == R.id.nav_formeln) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
ContentMain.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView android:text="#string/TextViewIntro" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elegantTextHeight="false"
android:gravity="top|center"
android:textColor="#000000"
android:textSize="#dimen/abc_text_size_title_material"
android:id="#+id/TextViewIntro"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true" />
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/fab"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_marginBottom="53dp"
android:src="#android:drawable/ic_menu_help" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignTop="#+id/TextViewIntro"
android:layout_alignParentEnd="true"
android:id="#+id/mainFrame"></FrameLayout>
BlankFragment.java
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
package flo.nawigator;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View fraglayoutv = inflater.inflate(R.layout.fragment_blank, null);
fragbtn1 = (Button) fraglayoutv.findViewById(R.id.buttonfrag1);
fragbtn1.setOnClickListener(this);
return fraglayoutv;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.buttonfrag1: {
Toast.makeText(getActivity(), "Button gedrückt!!", Toast.LENGTH_SHORT).show();
}
}
}
I have a BlankFragment! How do I Switch to it with Android Navigation Drawer
MainActivity.xml
<include layout="#layout/app_bar_main" android:layout_width="match_parent"
android:layout_height="match_parent" />
<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" />
fragment_blank.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context="flo.nawigator.BlankFragment"
android:id="#+id/fragmentgalerie">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="#string/galeriefragtext"
android:id="#+id/textView"
android:layout_centerHorizontal="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Okay!"
android:id="#+id/buttonfrag1"
android:layout_alignParentBottom="true"
android:layout_alignStart="#+id/textView"
android:layout_marginBottom="217dp" />

#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
Fragment fragment;
if (id == R.id.nav_gallery) {
} else if (id == R.id.Experimente) {
BlankFragment bnlfrgmnt = new BlankFragment();
getSupportFragmentManager().beginTransaction()
.add(R.id.mainFrame, bnlfrgmnt).commit();
//do similar for other navigation drawer items to display other fragments.
} else if (id == R.id.nav_formeln) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}

Related

Unable to start Activity, No view found for id

I am new with Android development, so this is probably a rookie mistake but, I am stuck.
I want to start an activity when clicking on the menu, but the following exception shows up:
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.mygymroutine.mygymroutine/com.mygymroutine.mygymroutine.activities.ActivitySchedule}:
java.lang.IllegalArgumentException: No view found for id 0x7f0d008b
(com.mygymroutine.mygymroutine:id/fragment_schedule) for fragment
ScheduleFragment{39f1839 #0 id=0x7f0d008b ...
This is the code related:
public class basic extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_basic);
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.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
displaySelectedScreen(R.id.nav_schedule);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.basic, menu);
return true;
}
#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.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public boolean onNavigationItemSelected(MenuItem item) {
displaySelectedScreen(item.getItemId());
return true;
}
private void displaySelectedScreen(int itemId) {
Intent intent=null;
switch (itemId) {
case R.id.nav_schedule:
intent=new Intent(this, ActivitySchedule.class);
startActivity(intent);
break;
}
Activity code
package com.mygymroutine.mygymroutine.activities;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.mygymroutine.mygymroutine.Fragments.ScheduleFragment;
import com.mygymroutine.mygymroutine.R;
public class ActivitySchedule extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.acivity_schedule);
if(savedInstanceState==null){
ScheduleFragment fg = new ScheduleFragment();
getSupportFragmentManager().beginTransaction().add(R.id.fragment_schedule, fg)
.commit();
}
}
}
Fragment
package com.mygymroutine.mygymroutine.Fragments;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.mygymroutine.mygymroutine.R;
public class ScheduleFragment extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
//returning our layout file
//change R.layout.yourlayoutfilename for each of your fragments
View rootView=inflater.inflate(R.layout.fragment_schedule, container, false);
FloatingActionButton fab=(FloatingActionButton)rootView.findViewById(R.id.fab_schedule);
return inflater.inflate(R.layout.fragment_schedule, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getActivity().setTitle("Schedule");
}
}
Fragment Schedule xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/fragment_schedule"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="17dp"
android:text="Schedule"
android:textAppearance="?android:attr/textAppearanceLarge" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab_schedule"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="41dp"
android:layout_marginEnd="32dp"
android:layout_marginRight="32dp"
android:clickable="true"
android:tint="#android:color/background_light"
app:backgroundTint="#android:color/holo_red_light"
app:fabSize="mini"
app:rippleColor="#android:color/transparent"
app:srcCompat="#android:drawable/ic_menu_add" />
</RelativeLayout>
Activity schedule xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
tools:context="com.mygymroutine.mygymroutine.activities.ActivitySchedule">
</android.support.constraint.ConstraintLayout>

Here:
getSupportFragmentManager().beginTransaction().add(R.id.fragment_schedule, fg)
.commit();
You are passing R.id.fragment_schedule as the container of the fragment. Where the fragment will be inserted. However, R.id.fragment_schedule is part of your Fragment. So, it was not inflated yet. You can't use it as container since it was not created yet.
I think you want is:
<android.support.constraint.ConstraintLayout 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"
tools:context="com.mygymroutine.mygymroutine.activities.ActivitySchedule"
<!-- ADD LINE BELOW -->
android:id="#+id/fragment_container" >
</android.support.constraint.ConstraintLayout>
And change this:
getSupportFragmentManager().beginTransaction().add(R.id.fragment_schedule, fg)
.commit();
to this:
getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, fg)
.commit();

In. The onOptionsItemSelected method add the following
(This method brings a parameter - MenuItem item)
switch (item.getItemId())
case R.id.myFirst
startActivity(new Intent(this, MyFirstActivity.class));
case R.id.mySecond
startActivity (newIntent(this, MySecondActivity.class));
And so on. You may define a layout for the activity with necessary views. You may also declare the activity in the Manifest file.
This works. I am starting my activities from the main like this.

Android: Navigation Drawer Z-index incorrect

I have created a Navigation Drawer "BaseActivity" to be extended by multiple activities however when I open the Navigation Drawer none of the menu items can be clicked, there is a semi-opaque layer over them which suggests to me the z-order in which they are loaded is incorrect. How would I go about fixing this?
Not enough rep to post image! http://imgur.com/a/IT9LI
activity_base.xml
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_base"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<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_navigation"
app:menu="#menu/activity_base_drawer"/>
</android.support.v4.widget.DrawerLayout>
content_base.xml
<android.support.v4.widget.DrawerLayout
android:id="#+id/activity_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<FrameLayout
android:id="#+id/activity_content"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="#+id/navigationView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:menu="#menu/activity_base_drawer"/>
</android.support.v4.widget.DrawerLayout>
baseactivity.java
package com.example.SNIPCONFIDENTIAL;
import android.content.Intent;
import android.support.annotation.LayoutRes;
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.MenuItem;
import android.view.View;
import android.widget.FrameLayout;
public class BaseActivity extends AppCompatActivity implements
NavigationView.OnNavigationItemSelectedListener {
private NavigationView navigationView;
private DrawerLayout fullLayout;
private Toolbar toolbar;
private ActionBarDrawerToggle drawerToggle;
private int selectedNavItemId;
#Override
public void setContentView(#LayoutRes int layoutResID) {
fullLayout = (DrawerLayout)
getLayoutInflater().inflate(R.layout.activity_base, null);
FrameLayout activityContainer = (FrameLayout)
fullLayout.findViewById(R.id.activity_content);
getLayoutInflater().inflate(layoutResID, activityContainer, true);
super.setContentView(fullLayout);
toolbar = (Toolbar) findViewById(R.id.toolbar);
navigationView = (NavigationView)
findViewById(R.id.navigationView);
if (useToolbar())
{
setSupportActionBar(toolbar);
}
else
{
toolbar.setVisibility(View.GONE);
}
setUpNavView();
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout)
findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
/* #Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is
present.
getMenuInflater().inflate(R.menu.base, menu);
return true;
}*/
#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.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
/*if (id == R.id.action_settings) {
return true;
}*/
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
Intent myIntent = new Intent(BaseActivity.this,
createmytimetable_days.class);
//myIntent.putExtra("key", value); //Optional parameters
BaseActivity.this.startActivity(myIntent);
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout)
findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
//STUFF FOR ADDING A BUTTON TO THE TOOLBAR
protected boolean useToolbar()
{
return true;
}
//STUFF FOR ADDING A BUTTON TO THE TOOLBAR
protected void setUpNavView() {
navigationView.setNavigationItemSelectedListener(this);
if( useDrawerToggle()) { // use the hamburger menu
drawerToggle = new ActionBarDrawerToggle(this, fullLayout,
toolbar,
R.string.navigation_drawer_open,
R.string.navigation_drawer_close);
fullLayout.addDrawerListener(drawerToggle);
drawerToggle.syncState();
} else if(useToolbar() && getSupportActionBar() != null) {
// Use home/back button instead
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeAsUpIndicator(getResources()
.getDrawable(R.drawable.ic_menu_send));
}
}
//STUFF FOR ADDING A BUTTON TO THE TOOLBAR
protected boolean useDrawerToggle()
{
return true;
}
}

If the problem is with the Z-index as you said, then you can make it always on top using bringToFront() call this method to your DrawerLayout or NavigationView!

How do I fix: No view found for id 0x7f0d00aa?

I've seen people with the same issue and they said that there is something wrong with the .replace() and the way I've constructed the way the fragment and container are written using the: fragmentManager.beginTransaction().replace
(R.id.container, new Fragment()).commit();
And that I must do it some other way, which I implemented into my code but I still got the Error.
ERROR:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: mcshreker.pocketmath, PID: 3215
java.lang.IllegalArgumentException: No view found for id 0x7f0d00aa (mcshreker.pocketmath:id/content_main_container) for fragment secondFragment{bf0f022 #0 id=0x7f0d00aa}
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1292)
at android.support.v4.app.FragmentManagerImpl.moveFragmentsToInvisible(FragmentManager.java:2323)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2136)
at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2092)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1998)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:709)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Code (Main Activity)
package mcshreker.pocketmath;
import android.app.FragmentTransaction;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v4.app.FragmentManager;
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;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
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.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#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;
}
#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.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
#RequiresApi(api = Build.VERSION_CODES.M)
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
return super.onOptionsItemSelected(item);
FragmentManager fragmentManager = getSupportFragmentManager();
if (id == R.id.nav_first_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new firstFragment()).commit();
// Handle the camera action
}
} else if (id == R.id.nav_second_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new secondFragment()).commit();
} else if (id == R.id.nav_third_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new thirdFragment()).commit();
} else if (id == R.id.nav_fourth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new fourthFragment()).commit();
} else if (id == R.id.nav_fifth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new fifthFragment()).commit();
} else if (id == R.id.nav_sixth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new sixthFragment()).commit();
} else if (id == R.id.nav_seventh_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new seventhFragment()).commit();
} else if (id == R.id.nav_eighth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new eighthFragment()).commit();
} else if (id == R.id.nav_ninth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new ninthFragment()).commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
HERE is my content_main_container XML:
<?xml version="1.0" encoding="utf-8"?>
<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:id="#+id/content_main_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="mcshreker.pocketmath.MainActivity">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:srcCompat="#drawable/e"
android:id="#+id/imageView7"
android:layout_marginTop="96dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:contentDescription=""
tools:ignore="ContentDescription" />
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:srcCompat="#drawable/welcome"
android:id="#+id/imageView2"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
tools:ignore="ContentDescription" />
</LinearLayout>
</RelativeLayout>
Here is my Activity_main XML:
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<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.v4.widget.DrawerLayout>
Help is greatly appreciated!

No view found for id 0x7f0d00aa (mcshreker.pocketmath:id/content_main_container)
check if content_main_container is defined in your activity_main layout

Android empty fragment

I have an android app with a Navigation Drawer, which should change between fragments. But my main fragment (the only fragment now) doesn't show up. It is just an empty screen. Could someone tell me what did I do wrong?
Thanks in advance.
MainActivity.java:
package com.asd.apptest;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
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;
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
NavigationView navigationView = null;
Toolbar toolbar = null;
homescreen home_fragment = new homescreen();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFragments();
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.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
navigationView.getMenu().getItem(0).setChecked(true);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#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;
}
#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.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
int id = item.getItemId();
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
if (id == R.id.nav_home) {
ft.show(home_fragment);
ft.commit();
} else if (id == R.id.nav_light) {
} else if (id == R.id.nav_add_device) {
} else if (id == R.id.nav_settings_app) {
} else if (id == R.id.nav_settings_server) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
private void initFragments() {
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.add(R.id.fragment_container, home_fragment);
//ft.hide(mGalleryFragment);
ft.commit();
}
}
app_bar_main.xml:
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</android.support.design.widget.CoordinatorLayout>
homescreen.java:
package com.asd.apptest;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class homescreen extends Fragment {
public homescreen (){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_homescreen, container, false);
return rootView;
}
}
fragment_homescreen.xml only contains a textview and show up properly n the editor.

fragment not switching for navigation drawer

I'm trying to get the navigation drawer down, i've followed a few tutorials around the internet however they all end up not working. Now I know it's something simple but I can't figure it out. Menu opens, main fragment loads, but if I click a new fragment, nothing works. ideas?
activity_main.xml
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<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" />
MainFragment java
package com.autotools.autotools;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MainFragment extends Fragment {
public MainFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
// Inflate the layout for this fragment
return rootView;
}
}
Second Fragment
package com.autotools.autotools;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class autoLoanFragment extends Fragment {
public autoLoanFragment(){
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_autoloan,container,false);
}
}
MainActivity java
package com.autotools.autotools;
import android.support.v4.app.FragmentManager;
import android.os.Bundle;
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 com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
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.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
MainFragment fragment = new MainFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.content_frame, fragment);
fragmentTransaction.commit();
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#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;
}
#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.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_home) {
MainFragment fragment = new MainFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.content_frame, fragment);
fragmentTransaction.commit();
} else if (id == R.id.nav_autoLoan) {
autoLoanFragment fragment = new autoLoanFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.content_frame, fragment);
fragmentTransaction.commit();
} else if (id == R.id.nav_gas) {
} else if (id == R.id.nav_settings) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
Fragment_main xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="#+id/textView2"
android:layout_gravity="center_horizontal|top" />
</FrameLayout>
activity_main_drawer xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="#+id/nav_home"
android:icon="#drawable/ic_info_black_48dp"
android:title="Home" />
<item
android:id="#+id/nav_autoLoan"
android:icon="#drawable/ic_attach_money_black_48dp"
android:title="Auto Loan Calculator" />
<item
android:id="#+id/nav_gas"
android:icon="#drawable/ic_local_gas_station_black_48dp"
android:title="Slideshow" />
<item
android:id="#+id/nav_settings"
android:icon="#drawable/ic_settings_black_48dp"
android:title="Settings" />
</group>
<item android:title="Communicate">
<menu>
<item
android:id="#+id/nav_share"
android:icon="#drawable/ic_menu_share"
android:title="Share" />
<item
android:id="#+id/nav_send"
android:icon="#drawable/ic_menu_send"
android:title="Send" />
</menu>
</item>
</menu>

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How to switch between Fragments in default Android Studio Navigation Drawer - java

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