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Fragment over listview activity [duplicate]

This question already has answers here:
Fragment won't launch
(2 answers)
Closed 5 years ago.
I am pretty new to android development, so please don't flame me for stupid questions/mistakes!
I have a listview inside my activity, but i want to open up a fragment when a frame in the listview is clicked on. I have the onclick working, but it is not launching the new activity.
I'll include my code below.
This is the oncreate
protected void onCreate (Bundle savedInstanceState)
{
//Fragment fragment_blank2=new SomeFragment();
e = myBadData.getData();
super.onCreate(savedInstanceState);
setContentView(R.layout.event_list);
events=(ListView) findViewById(R.id.dayList);
ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,e);
events.setAdapter(adapter);
events.setOnItemClickListener(this);
}
this is the onclick
public void onItemClick(AdapterView<?> adapterView, View view, final int i, long l)
{
myBadData.setId(i);
Fragment fr = new event_description();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.add(R.id.eventdescription, fr);
}
this is the XML of the fragment
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id = "#+id/eventdescription"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="layout.BlankFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="137dp"
android:text="#string/event_name"
android:textSize="26sp"
android:layout_gravity="top"
android:gravity="top|center"
android:paddingTop="10dp"
android:id="#+id/textView"
android:background="#android:color/holo_orange_light"
android:textColor="#android:color/black"
android:layout_weight="1.08" />
<TextView
android:text="#string/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/date"
android:layout_marginTop="#dimen/activity_top_margin"
android:layout_marginLeft="#dimen/activity_side_margin"
android:textSize="18sp"
android:drawableTint="#android:color/background_dark" />
<TextView
android:text="#string/time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/time"
android:layout_marginTop="70dp"
android:layout_marginLeft="#dimen/activity_side_margin"
android:textSize="18sp" />
<TextView
android:text="#string/cost"
android:layout_gravity="right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/cost"
android:layout_marginTop="#dimen/activity_top_margin"
android:layout_marginRight="70dp"
android:textSize="18sp"/>
<TextView
android:text="#string/address"
android:layout_gravity="right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/address"
android:layout_marginTop="70dp"
android:layout_marginRight="60dp"
android:textSize="18sp" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="135dp"
android:layout_marginLeft="10dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:weightSum="1">
<TextView
android:id="#+id/tv_long"
android:paddingTop="10dp"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="#string/sample_text"
android:textSize="18sp"
android:layout_weight="1.08">
</TextView>
</LinearLayout>
</ScrollView>
<Button
android:text="#string/add_to_calendar"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:id="#+id/button2"
android:layout_gravity="center_horizontal"
android:layout_marginTop="95dp"/>
</FrameLayout>
here is the class of the fragment
public class event_description extends Fragment
{
#Nullable
//#Override
public View OnCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.inflate (R.layout.event_description, container, false);
Bundle args = getArguments();
String arg = args.getString(eventList.KEY_NAME);
//return super.(R.layout.event_description, container, false);
return view;
}
public View getView() {
return getView();
}
}

For Your Activity XML
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/my_frame"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- TODO: Update blank fragment layout -->
<ListView
android:id="#+id/dayList"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</FrameLayout>
And Pass Activity's Container in FramgmentTransaction
public void onItemClick(AdapterView<?> adapterView, View view, final int i, long l)
{
myBadData.setId(i);
Fragment fr = new event_description();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
//Your Container of Activity
fragmentTransaction.add(R.id.my_frame, fr);
fragmentTransaction.commit();
}
and Don't forgot to commint it.
No need to use framgment's FrameLayout as a container..

how to replace existed (specific) fragment with another fragment in the same position in android?

if i have three fragments and i need to replace specific one by another how can i do this ? and how does replace method work in fragment transaction ? i find it replace one fragment by another if i have one fragment visible but if i have two fragments visible it replace a random one and if i have 4 fragments it replace two fragments by one!
in this program below i tried to add 4 fragments by using (add A) and (add B) Buttons but the problem exists when i try to use (replace A with B) or (replace B with A) buttons this will replace random fragment by fragment A or B.
Main Activity
package com.example.muhammad_adel.transaction;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends AppCompatActivity {
FragmentManager manager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
manager = getFragmentManager();
}
public void addA(View view) {
FragmentTransaction transaction = manager.beginTransaction();
FragmentA fragmentA = new FragmentA();
transaction.add(R.id.linearLayout, fragmentA, "addA");
transaction.commit();
}
public void removeA(View view) {
FragmentA fragmentA = (FragmentA) manager.findFragmentByTag("addA");
if (fragmentA != null && fragmentA.isVisible()) {
FragmentTransaction transaction = manager.beginTransaction();
transaction.remove(fragmentA);
transaction.commit();
}
}
public void replaceAwithB(View view) {
FragmentB fragmentB = new FragmentB();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.linearLayout, fragmentB, "addB");
transaction.commit();
}
public void addB(View view) {
FragmentB fragmentB = new FragmentB();
FragmentTransaction transaction = manager.beginTransaction();
transaction.add(R.id.linearLayout, fragmentB, "addB");
transaction.commit();
}
public void removeB(View view) {
FragmentB fragmentB = (FragmentB) manager.findFragmentByTag("addB");
if (fragmentB != null && fragmentB.isVisible()) {
FragmentTransaction transaction = manager.beginTransaction();
transaction.remove(fragmentB);
transaction.commit();
}
}
public void replaceBwithA(View view) {
FragmentA fragmentA = new FragmentA();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.linearLayout, fragmentA, "addA");
transaction.commit();
}
public void attachA(View view) {
FragmentA fragmentA = (FragmentA) manager.findFragmentByTag("addA");
if (fragmentA != null && !fragmentA.isVisible()) {
FragmentTransaction transaction = manager.beginTransaction();
transaction.attach(fragmentA);
transaction.commit();
}
}
public void attachB(View view) {
FragmentB fragmentB = (FragmentB) manager.findFragmentByTag("addB");
if (fragmentB != null && !fragmentB.isVisible()) {
FragmentTransaction transaction = manager.beginTransaction();
transaction.attach(fragmentB);
transaction.commit();
}
}
public void DetachedA(View view) {
FragmentA fragmentA = (FragmentA) manager.findFragmentByTag("addA");
if (fragmentA != null && fragmentA.isVisible()) {
FragmentTransaction transaction = manager.beginTransaction();
transaction.detach(fragmentA);
transaction.commit();
}
}
public void DetachedB(View view) {
FragmentB fragmentB = (FragmentB) manager.findFragmentByTag("addB");
if (fragmentB != null && fragmentB.isVisible()) {
FragmentTransaction transaction = manager.beginTransaction();
transaction.detach(fragmentB);
transaction.commit();
}
}}
public void replaceAOnlyWithB(View view) {
}
FragmentA
package com.example.muhammad_adel.transaction;
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class FragmentA extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_a, container, false);
}
}
FragmentB
package com.example.muhammad_adel.transaction;
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class FragmentB extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_b, container, false);
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.muhammad_adel.transaction.MainActivity"
android:orientation="vertical">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add A"
android:id="#+id/button"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textAllCaps="false"
android:onClick="addA"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Remove A"
android:id="#+id/button2"
android:layout_alignBottom="#+id/button"
android:layout_toRightOf="#+id/button"
android:layout_toEndOf="#+id/button"
android:textAllCaps="false"
android:onClick="removeA"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Replace A with B"
android:id="#+id/button3"
android:layout_alignBottom="#+id/button2"
android:layout_toRightOf="#+id/button2"
android:textAllCaps="false"
android:layout_alignRight="#+id/linearLayout"
android:layout_alignEnd="#+id/linearLayout"
android:onClick="replaceAwithB"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Attach A"
android:id="#+id/button4"
android:layout_below="#+id/button5"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textAllCaps="false"
android:onClick="attachA"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add B"
android:id="#+id/button5"
android:layout_below="#+id/button"
android:layout_alignRight="#+id/button4"
android:layout_alignEnd="#+id/button4"
android:textAllCaps="false"
android:onClick="addB"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Remove B"
android:id="#+id/button6"
android:layout_alignTop="#+id/button5"
android:layout_toRightOf="#+id/button5"
android:layout_toEndOf="#+id/button5"
android:textAllCaps="false"
android:onClick="removeB"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Replace B with A"
android:id="#+id/button7"
android:layout_alignBaseline="#+id/button6"
android:layout_alignBottom="#+id/button6"
android:layout_toRightOf="#+id/button6"
android:textAllCaps="false"
android:layout_alignRight="#+id/button3"
android:layout_alignEnd="#+id/button3"
android:onClick="replaceBwithA"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Attach B"
android:id="#+id/button8"
android:layout_alignTop="#+id/button4"
android:layout_toRightOf="#+id/button5"
android:layout_toEndOf="#+id/button5"
android:textAllCaps="false"
android:onClick="attachB"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Replace A Only with B"
android:id="#+id/button9"
android:layout_below="#+id/button7"
android:layout_alignLeft="#+id/button7"
android:layout_alignStart="#+id/button7"
android:layout_alignRight="#+id/button3"
android:layout_alignEnd="#+id/button3"
android:textAllCaps="false"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/button4"
android:id="#+id/button11"
android:text="Detached A"
android:textAllCaps="false"
android:onClick="DetachedA"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/button11"
android:layout_below="#id/button8"
android:text="Detached B"
android:textAllCaps="false"
android:onClick="DetachedB"
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/linearLayout"
android:layout_below="#+id/button11"></LinearLayout>
</RelativeLayout>
fragment_a.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:background="#3498db"
android:layout_weight="1"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Hello Man this is Fragment A"
android:id="#+id/textView"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:textColor="#FFF"
/>
</RelativeLayout>
fragment_b.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:background="#F92"
android:layout_weight="1"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Hello man this is Fragment B"
android:id="#+id/textView2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:textColor="#FFF"
/>
</RelativeLayout>

You can change the fragment with the following way
step 1: Set the id of the layout you want to replace with the other fragment.
fragment 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="com.example.neelay.level47.Fragment.Album"
android:background="#4d263238"
android:id="#+id/replace_frag">
<!-- TODO: Update blank fragment layout -->
<Button
android:text="Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:id="#+id/button" />
Step 2: Set the onclick in your fragment and just do the fragment transaction
Fragment java
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_album, container, false);
Button button =(Button)view.findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Fragment someFragment = new Replacement();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.replace_frag, someFragment ); // give your fragment container id in first parameter
transaction.addToBackStack(null); // if written, this transaction will be added to backstack
transaction.commit();
}
});
return view;
}
I am replacing the fragment in a scrollable tab and if you want to replace all the scrollable tab then you can set the id of your content_main

Navigating fragments

I'm new to the android. I've an activity with 5 fragments and I've used addTobackStack so that I can move to the previous fragments when back button is clicked. It does the work but I want to call the functions in which I've been replacing the fragments when back button is pressed.
Any help?
Here is the code.
Dashboard.java
package com.example.sheikhspc.design;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.app.Fragment;
import android.content.Intent;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class dashboard extends AppCompatActivity {
ImageView home1, subs1, noti1,settings1,date1;
Fragment frag = null;
TextView home, subs,noti,set,date;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dashboard);
home1 = (ImageView) findViewById(R.id.home1);
subs1 = (ImageView) findViewById(R.id.subs1);
noti1 = (ImageView) findViewById(R.id.noti1);
settings1 = (ImageView) findViewById(R.id.settings1);
date1 = (ImageView) findViewById(R.id.date1);
frag = new dashboard1();
home = (TextView)findViewById(R.id.hometv);
subs = (TextView)findViewById(R.id.substv);
noti = (TextView)findViewById(R.id.notitv);
set = (TextView)findViewById(R.id.settingstv);
date = (TextView)findViewById(R.id.datestv);
FragmentManager fm = getFragmentManager();
fm.beginTransaction().add(R.id.container1,frag).commit();
Toolbar mytoolbar = (Toolbar)findViewById(R.id.mytoolbar);
setSupportActionBar(mytoolbar);
getSupportActionBar().setTitle("Home");
home.setTextColor(0xFF000000);
}
public void dbfragment(View view)
{
if(frag != null)
{
home1.setBackgroundDrawable(getResources().getDrawable(R.drawable.home_icon_black) ome1.setBackgroundDrawable(getResources().getDrawable(R.drawable.home_icon_black) );
home.setTextColor(0xFF000000);
subs1.setBackgroundDrawable(getResources().getDrawable(R.drawable.subscription_ic on));
noti1.setBackgroundDrawable(getResources().getDrawable(R.drawable.noti_icon));
settings1.setBackgroundDrawable(getResources().getDrawable(R.drawable.setting_icon));
date1.setBackgroundDrawable(getResources().getDrawable(R.drawable.date_icon));
date1.setBackgroundDrawable(getResources().getDrawable(R.drawable.d))
frag = new dashboard1();
getSupportActionBar().setTitle("Home");
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.container1,frag);
fragmentTransaction.commit();
}
}
public void dates(View view)
{
if(frag != null)
{
home1.setBackgroundDrawable(getResources().getDrawable(R.drawable.home_icon));
subs1.setBackgroundDrawable(getResources().getDrawable(R.drawable.subscription_icon));
noti1.setBackgroundDrawable(getResources().getDrawable(R.drawable.noti_icon));
settings1.setBackgroundDrawable(getResources().getDrawable(R.drawable.setting_icon));
date1.setBackgroundDrawable(getResources().getDrawable(R.drawable.date_icon_black));
date.setTextColor(0xFF000000);
getSupportActionBar().setTitle("Available Dates");
frag = new AvailableDates();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.container1,frag);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
public void subscription(View view)
{
if (frag != null)
{
home1.setBackgroundDrawable(getResources().getDrawable(R.drawable.home_icon));
subs1.setBackgroundDrawable(getResources().getDrawable(R.drawable.subscription_icon_black));
noti1.setBackgroundDrawable(getResources().getDrawable(R.drawable.noti_icon));
settings1.setBackgroundDrawable(getResources().getDrawable(R.drawable.setting_icon));
date1.setBackgroundDrawable(getResources().getDrawable(R.drawable.date_icon));
subs.setTextColor(0xFF000000);
getSupportActionBar().setTitle("Subscriptions");
frag = new Subscription();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.container1,frag);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
public void noti(View view)
{
getSupportActionBar().setTitle("Notifications");
if (frag != null)
{
home1.setBackgroundDrawable(getResources().getDrawable(R.drawable.home_icon));
subs1.setBackgroundDrawable(getResources().getDrawable(R.drawable.subscription_icon));
noti1.setBackgroundDrawable(getResources().getDrawable(R.drawable.noti_icon_black));
settings1.setBackgroundDrawable(getResources().getDrawable(R.drawable.setting_icon));
noti.setTextColor(0xFF000000);
date1.setBackgroundDrawable(getResources().getDrawable(R.drawable.date_icon));
frag = new Notification();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.container1,frag);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
public void settings(View view)
{
getSupportActionBar().setTitle("Settings");
if (frag != null)
{
set.setTextColor(0xFF000000);
home1.setBackgroundDrawable(getResources().getDrawable(R.drawable.home_icon));
subs1.setBackgroundDrawable(getResources().getDrawable(R.drawable.subscription_icon));
noti1.setBackgroundDrawable(getResources().getDrawable(R.drawable.noti_icon));
settings1.setBackgroundDrawable(getResources().getDrawable(R.drawable.setting_ion_black));
date1.setBackgroundDrawable(getResources().getDrawable(R.drawable.date_icon));
frag = new Settings();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.container1,frag);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
public void signout(View view)
{
Intent intent = new Intent(this, Login.class);
startActivity(intent);
}
#Override
public void onBackPressed() {
if (getFragmentManager().getBackStackEntryCount() > 0 ){
getFragmentManager().popBackStack();
} else {
super.onBackPressed();
}
}
}
Activity_dashboard.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_dashboard"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"
tools:context="com.example.sheikhspc.design.dashboard">
<include layout="#layout/toolbar"
android:id="#+id/mytoolbar"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/background"
android:layout_below="#id/mytoolbar">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/headrl"
android:paddingTop="5dp"
android:paddingRight="20dp"
android:paddingLeft="20dp"
android:paddingBottom="5dp"
android:background="#color/white"
tools:ignore="NotSibling">
<!-- <Button
android:text=""
android:background="#drawable/subscription_icon_black"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/notificationbtn"
android:onClick="subscription"
android:layout_marginLeft="10dp"
android:layout_marginStart="10dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/adbtn"
android:layout_toEndOf="#+id/adbtn"
android:layout_marginTop="7dp" />-->
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/home_icon_black"
android:onClick="dbfragment"
android:id="#+id/home1"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Home"
android:layout_below="#+id/home1"
android:id="#+id/hometv"
android:textSize="10dp"
android:layout_marginTop="2dp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/date_icon"
android:onClick="dates"
android:id="#+id/date1"
android:layout_marginLeft="30dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/home1"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Dates"
android:layout_below="#+id/date1"
android:textSize="10dp"
android:id="#+id/datestv"
android:layout_marginLeft="30dp"
android:layout_toRightOf="#+id/home1"
android:layout_marginTop="0dp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/noti_icon"
android:onClick="noti"
android:id="#+id/noti1"
android:layout_marginLeft="35dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/date1"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Notifications"
android:layout_below="#+id/noti1"
android:textSize="10dp"
android:id="#+id/notitv"
android:layout_marginLeft="15dp"
android:layout_toRightOf="#+id/date1"
android:layout_marginTop="0dp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/subscription_icon"
android:onClick="subscription"
android:id="#+id/subs1"
android:layout_marginLeft="35dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/noti1"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Subscription"
android:layout_below="#+id/noti1"
android:textSize="10dp"
android:layout_marginLeft="25dp"
android:id="#+id/substv"
android:layout_toRightOf="#+id/noti1"
android:layout_marginTop="0dp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/setting_icon"
android:onClick="settings"
android:id="#+id/settings1"
android:layout_marginLeft="35dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/subs1"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Settings"
android:layout_below="#+id/noti1"
android:textSize="10dp"
android:id="#+id/settingstv"
android:layout_marginLeft="30dp"
android:layout_toRightOf="#+id/subs1"
android:layout_marginTop="0dp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/logout_icon"
android:onClick="signout"
android:id="#+id/signout1"
android:layout_marginLeft="35dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/settings1"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Logout"
android:layout_below="#+id/noti1"
android:textSize="10dp"
android:layout_marginLeft="30dp"
android:layout_toRightOf="#+id/settings1"
android:layout_marginTop="0dp"/>
<!--<Button
android:text=""
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/adbtn"
android:onClick="dates"
android:layout_marginTop="7dp"
android:layout_marginLeft="10dp"
android:background="#drawable/date_icon_black"
android:layout_toRightOf="#+id/dbbtn" />
<Button
android:text=""
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/dbbtn"
android:layout_marginTop="7dp"
android:background="#drawable/home_icon_black"
android:onClick="dbfragment"
android:layout_marginLeft="10dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />-->
</RelativeLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/headrl"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/Black"
android:id="#+id/container1">
</RelativeLayout>
</ScrollView>
</RelativeLayout>

You can implement the FragmentManager.OnBackStackChangedListener and call your methods there depending upon which fragment is currently in the back stack. As I understand, currently the methods are called via touch interactions like button clicks. You wouldn't be able to do this on backstack change and need to figure out an alternate way.
You need to implement OnBackStackChangedListener in the activity. Better do the following in onCreate in your dashboard.java:
fragmentManager = getFragmentManager();
fragmentManager.addOnBackStackChangedListener(this);
Then override onBackStackChanged in your dashboard.java like this:
#Override
public void onBackStackChanged() {
//get the current fragment being displayed
Fragment fragment = fragmentManager.findFragmentById(R.id.container1);
if (fragment instanceof AvailableDates) {
//do your stuff
} else if (fragment instanceof Subscription) {
//do other stuff
} //and so on for each fragment
}
You can make different implementations for your onClick methods like thus:
public void dates(View view)
{
if(frag != null)
{
openAvailableDates();
}
}
and then implement openAvailableDates thus:
void openAvailableDates() {
home1.setBackgroundDrawable(getResources().getDrawable(R.drawable.home_icon));
subs1.setBackgroundDrawable(getResources().getDrawable(R.drawable.subscription_icon));
noti1.setBackgroundDrawable(getResources().getDrawable(R.drawable.noti_icon));
settings1.setBackgroundDrawable(getResources().getDrawable(R.drawable.setting_icon));
date1.setBackgroundDrawable(getResources().getDrawable(R.drawable.date_icon_black));
date.setTextColor(0xFF000000);
getSupportActionBar().setTitle("Available Dates");
frag = new AvailableDates();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.container1,frag);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
and so on for your other methods and then call these new methods from onBackStackChanged.
One more tip. It's not good practice to name your classes starting with a lowercase letter. It's best to refactor dashboard.java to Dashboard.java.
Let me know if you need more help.

Fragment hide not working in Android

My requirement is, I've a main activity and I want to display an image and text instead of progress bar in a separate fragment.
I've a separate fragment and I want to display the fragment when user clicks on a button in MainActivity.
My issue is, when I start the app, the fragment gets displayed by default. I want the fragment to be displayed only when user clicks on button. When I start the app I want the activity to be displayed.
I've an activity_main xml as below
<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"
android:background="#drawable/background" >
<ScrollView
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="10dp"
android:orientation="vertical" >
<TableLayout
android:id="#+id/tableLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:stretchColumns="*" >
<TableRow
android:id="#+id/tableRow1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dip" >
<TextView
android:id="#+id/text1"
style="#style/textForLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dip"
android:text="#string/text1" />
<Spinner
android:id="#+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginRight="20dip"
android:layout_weight="1"
android:drawSelectorOnTop="true"
android:prompt="#string/spinner1"
android:spinnerMode="dialog" >
</Spinner>
</TableRow>
<TableRow
android:id="#+id/tableRow2"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/text2"
style="#style/textForLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dip"
android:text="#string/label2" />
<Spinner
android:id="#+id/spinner2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginRight="20dip"
android:layout_span="6"
android:layout_weight="1"
android:drawSelectorOnTop="true"
android:prompt="#string/spinner2"
android:spinnerMode="dropdown" />
</TableRow>
</TableLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:gravity="center"
android:orientation="horizontal" >
<TextView
android:id="#+id/text3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#color/red"
android:textSize="#dimen/text_medium"
android:textStyle="bold" />
</LinearLayout>
</LinearLayout>
</ScrollView>
<fragment
android:id="#+id/progress_bar_fragment"
android:name="com.test.pushnotificationeclipse.ProgressBarFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
The fragemnt_progress_bar.xml is as below:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="#style/NoActionBar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/background_all" >
<ImageView
android:id="#+id/imageView_frag_pgbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="#drawable/ic_launcher" />
<TextView
android:id="#+id/text_frag_pgbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/imageView_frag_pgbar"
android:layout_centerHorizontal="true"
android:layout_marginBottom="74dp"
android:textColor="#color/basic_color"
android:textSize="#dimen/text_medium_large" />
</RelativeLayout>
My ProgressBarFragment.java is as below
public class ProgressBarFragment extends Fragment {
#InjectView(R.id.text_frag_pgbar)
TextView textView;
#InjectView(R.id.imageView_frag_pgbar)
ImageView imageView;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_progress_bar, container,
false);
ButterKnife.inject(this, view);
return view;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public void onDetach() {
super.onDetach();
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
#Override
public void onResume() {
super.onResume();
}
}
My MainActivity.java is as below: When I pass true tohideAndShowFragment(), the fragment should be hidden and when I pass false the fragment should be shown.
public class MainActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.inject(this);
context = getApplicationContext();
hideAndShowFragment(true);
}
public void hideAndShowFragment(boolean hide) {
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ProgressBarFragment pf = new ProgressBarFragment();
if (hide) {
ft.hide(pf).commit();
} else {
ft.show(pf).commit();
}
}
}

The issue here is your hideAndShowFragment method. You are creating a new instance of ProgressBarFragment, but the FragmentTransaction hide and show methods only work on an attached fragment.
Instead, you should get the fragment you already defined in your XML by id.
public void hideAndShowFragment(boolean hide) {
FragmentManager fm = getFragmentManager();
ProgressBarFragment pf =
(ProgressBarFragment) fm.findFragmentById(R.id.progress_bar_fragment);
FragmentTransaction ft = fm.beginTransaction();
if (hide) {
ft.hide(pf).commit();
} else {
ft.show(pf).commit();
}
}
Additionally, this line is concerning:
context = getApplicationContext();
Your Activity is also a Context object, so unless you need the application specific context for something, you generally want to be using this where you need a context inside your activity.

FragmentManager fm = getFragmentManager();
fm.beginTransaction()
.setCustomAnimations(android.R.animator.fade_in, android.R.animator.fade_out)
.show(yourfragment)
.commit();
Ps:-Dont Don't mess with the visibility flags of the container - FragmentTransaction.hide/show does that internally for you.
Src:- "https://stackoverflow.com/a/16490344/1632286"

You might be better of getting an instance of the fragment in code and using the technique from the official docs as shown below and here (search for 'newInstance'). Add the following static method to your fragment.
public static ProgressFragment newInstance() {
DetailsFragment f = new DetailsFragment();
// Supply args here if needed.
/*Bundle args = new Bundle();
args.putInt("index", index);
f.setArguments(args);*/
return f;
}
Once you have that you can add the fragment to the top view layout with the following fragment transaction code which is inside the button click method.
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction tr = fm.beginTransaction();
tr.add(android.R.id.content, ProgressFragment.newInstance(), "ProgressFragmentTag");
tr.commit();
You can then use the following code to remove the fragment if needed;
FragmentManager fm = getSupportFragmentManager();
ProgressFragment frag = fm.findFragmentByTag("ProgressFragmentTag")
if (frag!=null)
{
FragmentTransaction tr = fm.beginTransaction();
tr.remove(frag).commit();
}
Hope this helps!

I resolved it by adding the fragment instead of having it shown:
public void hideAndShowFragment(boolean hide) {
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ProgressBarFragment pf = (ProgressBarFragment) fm.findFragmentById(R.id.progress_bar_fragment);
if (hide) {
ft.hide(pf).commit();
} else {
ft.add(android.R.id.content, pf, "ProgressFragmentTag").commit();
}
}

int count =1;
if (count == 1) {
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction =
fm.beginTransaction();
fragmentTransaction.replace(R.id.labelframe, new
labelfregaments());
fragmentTransaction.commit();
count =0;
}
else if (count == 0) {
FragmentManager fm = getFragmentManager();
labelfregaments fs = (labelfregaments)fm.findFragmentById(R.id.labelframe);
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.hide(fs);
fragmentTransaction.commit();
count=1;
}

Fragment UI components null TextViews

New android developer here. I am trying to create a dynamic UI that loads based on the users selection of a RadioGroup. Based on their selection, one of 3 possible fragments will be loaded into a LinearLayout section. This is my first attempt at my own sample problem that is not just a walk-through tutorial. Here is the main activity:
public class BaseConverter extends Activity {
RadioGroup convert;
Fragment toFragment;
RadioGroup toRadioGroup = null;
TextView inputDisplay = null;
TextView outputDisplay = null;
TextView resultTitle = null;
#Override
public void onCreate(Bundle sIS) {
super.onCreate(sIS);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
this.setContentView(R.layout.base_converter);
convert = (RadioGroup) this.findViewById(R.id.bc_convert_group);
convert.setOnCheckedChangeListener(new ConvertListener());
FragmentManager fm = getFragmentManager();
FragmentTransaction converterFragment = fm.beginTransaction();
ConvertEmptyFragment emptyTo = new ConvertEmptyFragment();
converterFragment.replace(R.id.bc_converter_fragment, emptyTo);
converterFragment.commit();
FragmentTransaction toFragment = fm.beginTransaction();
ConvertEmptyFragment emptyConverter = new ConvertEmptyFragment();
toFragment.replace(R.id.bc_to_fragment, emptyConverter);
toFragment.commit();
}
#Override
public void onResume() {
convert.clearCheck();
super.onResume();
}
#Override
public void onPause() {
convert.clearCheck();
super.onPause();
}
// I put a little null check so you can see how I'm trying to access the TextViews and what results
public void updateUIComponents(){
View converterView = this.findViewById(R.id.bc_converter_fragment);
inputDisplay = (TextView)converterView.findViewById(R.id.bc_display_input);
outputDisplay = (TextView)converterView.findViewById(R.id.bc_display_output);
if (inputDisplay == null){
Log.d("BaseConverter", "inputDisplay == null");
} else {
Log.d("BaseConverter", "inputDisplay != null");
}
}
class ConvertListener implements OnCheckedChangeListener {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
Fragment toFragment;
Fragment converterFragment;
switch (checkedId) {
case R.id.bc_convert_binary:
toFragment = new ConvertRBFragmentBinary();
converterFragment = new ConverterFragmentBinary();
break;
case R.id.bc_convert_decimal:
toFragment = new ConvertRBFragmentDecimal();
converterFragment = new ConverterFragmentDecimal();
break;
case R.id.bc_convert_hex:
toFragment = new ConvertRBFragmentHex();
converterFragment = new ConverterFragmentHex();
break;
default:
toFragment = new ConvertEmptyFragment();
converterFragment = new ConvertEmptyFragment();
break;
}
FragmentManager fm = getFragmentManager();
FragmentTransaction converterTransaction = fm.beginTransaction();
converterTransaction.replace(R.id.bc_converter_fragment, converterFragment);
converterTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
converterTransaction.commit();
FragmentTransaction toTransaction = fm.beginTransaction();
toTransaction.replace(R.id.bc_to_fragment, toFragment);
toTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
toTransaction.commit();
updateUIComponents();
}
}
So, based on what a user chooses, the proper fragments will be loaded into the respective LinearLayout sections. However, now I want to implement the business logic of the fragments (which is just integer base conversion; i.e. binary number to decimal...) but when I try to access the TextViews, as seen in the updateUIComponents method, I get null pointers. What am I missing?
Here's the ConverterFragmentBinary class for reference:
public class ConverterFragmentBinary extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle sIS){
View v = inflater.inflate(R.layout.converter_fragment_binary, container, false);
return v;
}
}
and its respective xml layout for reference:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FF000000"
android:gravity="center_horizontal"
android:orientation="vertical" >
<ImageView
android:id="#+id/bc_binary_converter_logo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="15dip"
android:maxHeight="30dip"
android:src="#drawable/binary_converter" />
<TextView
android:id="#+id/bc_display_input"
style="#style/input_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dip"
android:layout_marginLeft="15dip"
android:layout_marginRight="15dip"
android:layout_marginTop="5dip"
android:gravity="center_vertical|right"
android:lines="1"
android:minHeight="30sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FF000000"
android:gravity="center_horizontal"
android:orientation="horizontal" >
<Button
android:id="#+id/button_num_0"
style="#style/op_button_land"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dip"
android:gravity="center"
android:onClick="num0"
android:text="#string/num_0" />
<Button
android:id="#+id/button_num_1"
style="#style/op_button_land"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dip"
android:gravity="center"
android:onClick="num1"
android:text="#string/num_1" />
</LinearLayout>
<TextView
android:id="#+id/bc_result_title"
style="#style/radio_button_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dip"
android:layout_marginRight="5dip"
android:layout_marginTop="10dip"
android:gravity="left"
android:text="#string/choose_convert" />
<TextView
android:id="#+id/bc_display_output"
style="#style/display_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="15dip"
android:layout_marginRight="15dip"
android:layout_marginTop="5dip"
android:gravity="center_vertical|right"
android:lines="1"
android:minHeight="30sp" />
</LinearLayout>
and then heres the main activity it gets loaded into:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/base_conversion_layout"
style="#style/layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="5"
android:baselineAligned="false"
android:gravity="center_vertical|left"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="2"
android:orientation="vertical" >
<TextView
style="#style/radio_button_header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/convert" />
<RadioGroup
android:id="#+id/bc_convert_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:padding="5dip" >
<RadioButton
android:id="#+id/bc_convert_binary"
style="#style/radio_button"
android:text="#string/binary" />
<RadioButton
android:id="#+id/bc_convert_decimal"
style="#style/radio_button"
android:text="#string/decimal" />
<RadioButton
android:id="#+id/bc_convert_hex"
style="#style/radio_button"
android:text="#string/hex" />
</RadioGroup>
</LinearLayout>
<LinearLayout
android:id="#+id/bc_to_fragment"
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="3"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/bc_converter_fragment"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="13"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
Thanks in advance and sorry for the long code blocks but I figured it was better to include more than less.

Also, you should inflate your Fragments layout to bring it from your XML to your Java code instead of simply referring it using findViewById() method.
So instead of doing this,
View converterView = this.findViewById(R.id.bc_converter_fragment);
Do this inside your onCreateView method of the fragment,
View converterView = infalter.inflate(R.id.bc_converter_fragment,null);
updateUIComponents(converterView);//call this methid and pass your view
new method looks like this,
public void updateUIComponents(View converterView){
inputDisplay = (TextView)converterView.findViewById(R.id.bc_display_input);
outputDisplay = (TextView)converterView.findViewById(R.id.bc_display_output);
if (inputDisplay == null){
Log.d("BaseConverter", "inputDisplay == null");
} else {
Log.d("BaseConverter", "inputDisplay != null");
}
}