Android Navigation Component : Pass value (arguments) in fragments

Issue

What I have done:

I have created Navigation Drawer Activity, As updated new format of Navigation Drawer Activity, As per new Android architecture, I got it with Navigation Component structure.

The NavigationView code with NavController and NavigationUI is below which is opening fragment when I click on any navigation item.

    DrawerLayout drawer  findViewById(R.id.drawer_layout);
    NavigationView navigationView  findViewById(R.id.nav_view);
    // Passing each menu ID as a set of Ids because each
    // menu should be considered as top level destinations.
    mAppBarConfiguration  new AppBarConfiguration.Builder(
            R.id.nav_home, R.id.nav_profile, R.id.nav_privacy_policy,
            R.id.nav_terms, R.id.nav_contact_us, R.id.nav_share, R.id.nav_send)
            .setDrawerLayout(drawer)
            .build();
    NavController navController  Navigation.findNavController(this, R.id.nav_host_fragment);
    NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
    NavigationUI.setupWithNavController(navigationView, navController);

This is for nav_host_fragment:

<fragment
        android:id"@+id/nav_host_fragment"
        android:name"androidx.navigation.fragment.NavHostFragment"
        android:layout_width"match_parent"
        android:layout_height"match_parent"
        app:defaultNavHost"true"
        app:layout_constraintLeft_toLeftOf"parent"
        app:layout_constraintRight_toRightOf"parent"
        app:layout_constraintTop_toTopOf"parent"
        app:navGraph"@navigation/mobile_navigation" />

The navigation is happening using this navigation/mobile_navigation.xml

<?xml version"1.0" encoding"utf-8"?>
<navigation 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/mobile_navigation"
    app:startDestination"@+id/nav_home">

    <fragment
        android:id"@+id/nav_home"
        android:name"com.sohamerp.marsremedies.fragment.HomeFragment"
        android:label"@string/menu_home"
        tools:layout"@layout/fragment_home" />

    <fragment
        android:id"@+id/nav_profile"
        android:name"com.sohamerp.marsremedies.fragment.ProfileFragment"
        android:label"@string/menu_my_profile"
        tools:layout"@layout/fragment_profile" />

    <fragment
        android:id"@+id/nav_privacy_policy"
        android:name"com.sohamerp.marsremedies.fragment.PrivacyPolicyFragment"
        android:label"@string/menu_privacy_policy"
        tools:layout"@layout/fragment_privacy_policy" />

    <fragment
        android:id"@+id/nav_terms"
        android:name"com.sohamerp.marsremedies.fragment.TermsConditionFragment"
        android:label"@string/menu_terms"
        tools:layout"@layout/fragment_terms_condition" />

    <fragment
        android:id"@+id/nav_contact_us"
        android:name"com.sohamerp.marsremedies.fragment.ContactUsFragment"
        android:label"@string/menu_contact_us"
        tools:layout"@layout/fragment_terms_condition" />

</navigation>

What I want to do:

Now I want to pass some values as a bundle (arguments) in Fragment when it’s called.

Scenario: I have two fragments PrivacyPolicyFragment and TermsConditionsFragment, In both fragments, I am just opening links inside WebView accordingly. So When I click on the menu item of Privacy Policy, I will pass a link related to the same.

In this new structure navigation/mobile_navigation.xml opening fragments, How can I pass arguments?

Any help?

Solution

So I forgot to go through this link : Define Destination Arguments

But this answer helpful to all lazy peoples like me:

Add dependency in project level build.gradle:

classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.1.0"

Apply plugin in app level build.gradle:

apply plugin: "androidx.navigation.safeargs"

Using XML: predefined (static) value:

In xml file of navigation /navigation/mobile_navigation.xml declare argument tag as below or you can design through this link:

<fragment
    android:id"@+id/nav_privacy_policy"
    android:name"com.sohamerp.marsremedies.fragment.PrivacyPolicyFragment"
    android:label"@string/menu_privacy_policy"
    tools:layout"@layout/fragment_privacy_policy" >
    <argument
        android:name"privacyPolicyLink"
        app:argType"string"
        android:defaultValue"http://sohamerp.com/avo/avo_privacy_policy.html"/>
</fragment>

<fragment
    android:id"@+id/nav_terms"
    android:name"com.sohamerp.marsremedies.fragment.PrivacyPolicyFragment"
    android:label"@string/menu_terms"
    tools:layout"@layout/fragment_terms_condition" >
    <argument
        android:name"privacyPolicyLink"
        app:argType"string"
        android:defaultValue"http://sohamerp.com/avo/avo_privacy_policy.html"/>
</fragment>

Now you have to write code in your Fragment like:

if(getArguments() ! null) {
    // The getPrivacyPolicyLink() method will be created automatically.
    String url  PrivacyPolicyFragmentArgs.fromBundle(getArguments()).getPrivacyPolicyLink();
}

Hope it will helps you others.

Answered By – Pratik Butani

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