如何将不同的参数传递给片段[导航] Android

Question

I have 4 fragment, A,B,C,D FROM A,B,C I can navigate to D fragment, I want to pass different args from each fragment like,

A.Direction.actionNavigation.D(int,String)
B.Direction.actionNavigation.D(float,Bool)
C.Direction.actionNavigation.D(double,String) and etc..

I can set all six args in D fragment argument but in this case I should pass all six variable on each direction. so is there other way to pass directly the args which i want on specific direction and then retrieve it in D fragment

Answer 1

Assuming you are Navigation Component, you need to make all the arguments that D Fragment demands to be nullable. In this way, you can forward only the particular arg from a particular fragment of your need to the D Fragment. For doing the same, you need to make changes to the xml file regarding the navigation component, which in general is called nav_graph.xml.

<argument
            android:name="fromAtoD"
            app:argType="string"
            app:nullable="true"/>

The above changes need to be made to achieve your needs. You need to make null checks to avoid the code from crashing

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Another approach to this, will be using Intent and passing bundles within Intent, which is not recommended neither is safe.