getApplicationContext from Capacitor Plugin

[w-mazed]

Hi guys,

I'm tryin to code my own plugin, but when I call

getActivity().getApplicationContext() or even getActivity()

Inside my plugin class I got

Attempt to invoke virtual method 'androidx.appcompat.app.AppCompatActivity com.getcapacitor.Bridge.getActivity()' on a null object reference

Any solution for this ?

Best regards.

[robingenz]

You should be able to call this.getActivity().getApplicationContext() in a class that extends com.getcapacitor.Plugin.

Example: https://github.com/ionic-team/capacitor-plugins/blob/d97898662d0ba037e5f8448990a91de5ec6a4234/app-launcher/android/src/main/java/com/capacitorjs/plugins/applauncher/AppLauncherPlugin.java#L25

Can you share some code?

[w-mazed]

Thank's @robingenz, I just tried the code that you provided, but still have the same error

package com.mycompany.mypackage;

import com.getcapacitor.JSObject;
import com.getcapacitor.Plugin;
import com.getcapacitor.PluginCall;
import com.getcapacitor.PluginMethod;
import com.getcapacitor.annotation.CapacitorPlugin;

@CapacitorPlugin(name = "MyPackage")
public class MyPackagePlugin extends Plugin {

    private MyPackage implementation = new MyPackage(this.getActivity().getApplicationContext());

    @PluginMethod
    public void echo(PluginCall call) {
        String value = call.getString("value");

        JSObject ret = new JSObject();
        ret.put("value", implementation.echo(value));
        call.resolve(ret);
    }
}

[robingenz]

Try to use the void load() method: https://github.com/robingenz/capacitor-badge/blob/cf29ce1d68628a328076d7ed34d21a11ce6eb927/android/src/main/java/dev/robingenz/capacitor/badge/BadgePlugin.java#L17

[w-mazed]

Works like a charm, thanks and have a great day :)

[deepakrout]

I am developing a custom plugin and I am having similar issue. It seems it can't find the plugin, calls based on the error from PluginHandle.java line#104:

public Plugin load() throws PluginLoadException {
        if (this.instance != null) {
            return this.instance;
        }
        try {
            **this.instance = this.pluginClass.getDeclaredConstructor().newInstance();**
            return this.loadInstance(instance);
        } catch (Exception ex) {
            throw new PluginLoadException("Unable to load plugin instance. Ensure plugin is publicly accessible");
        }
    }

The actual error from the Exception block is:

java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context com.getcapacitor.Bridge.getContext()' on a null object reference.

There are no build issues. As per the accepted answer, I have the @OverRide load method defined as well. I have gone through numerous stackoverflow questions, github issues, Capacitor documentation etc.; none of those fixed the issue. Without debugging the Capacitor java code, I just see "Plugin not implemented in android" message in Javascript console.

I would really appreciate any help in this regard.