How to get AssetManager from a library project

Question

I am trying to get AssetManager form a class in an Android library project, but I am getting the error:

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference

This is how I call it:

public class RevPluginLoader extends AppCompatActivity {

    private List<String> copyPlugins() {
        AssetManager assetManager = getAssets();  // This is where it all fails
    }
}

How can I get the AssetManager?

Where you added the assets folder..? in your lib module or in the main module..? try to add it in main module and check. — Muthukrishnan Rajendran, Aug 11 '17 at 05:21
How can I go about adding it in the lib module @MuthukrishnanRajendran — Program-Me-Rev, Aug 11 '17 at 05:38
Unfortunately, You cant add in lib module, check my answer below. — Muthukrishnan Rajendran, Aug 11 '17 at 05:48
Hi @Program-Me-Rev Please add more details in question,like RevPluginLoader in Library/in normal project.You project structure screen shot — CLIFFORD P Y, Aug 11 '17 at 06:01

score 2 · Accepted Answer · answered Aug 11 '17 at 05:45

2

We can't add assets folder in lib module

Library modules cannot include raw assets The tools do not support the use of raw asset files (saved in the assets/ directory) in a library module. Any asset resources used by an app must be stored in the assets/ directory of the app module itself.

For More details, you can refer here

answered Aug 11 '17 at 05:45

Muthukrishnan Rajendran

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I am using assets in lib folder :), including layout – CLIFFORD P Y Aug 11 '17 at 05:59
**layout** you can use but asserts you can't as per doc please refer the link which I provided in my answer. If you are using in different way of adding assets in your lib, share us the ideas, so that other people can get help. – Muthukrishnan Rajendran Aug 11 '17 at 06:06
on your link "Additionally, an AAR file may include one or more of the following optional entries: assets" . Lol – Alexufo Nov 21 '21 at 10:25

score 1 · Answer 2 · answered Aug 11 '17 at 05:30

1

I think you have a onCreateView

public class RevPluginLoader extends AppCompatActivity {

    private Context mContext = null; //declare a context here
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mContext  = this; //assign class object to context
    }

    private List<String> copyPlugins() {
        AssetManager assetManager = mContext.getAssets(); //use context here
    }
}

Check commented lines

This may solve your problem

answered Aug 11 '17 at 05:30

CLIFFORD P Y

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RevPluginLoader have context reference all over the class other than the static method. – Muthukrishnan Rajendran Aug 11 '17 at 05:32
but the error showing getresourse called on a null object – CLIFFORD P Y Aug 11 '17 at 05:58

How to get AssetManager from a library project

2 Answers2