### android activity test steps

1. create a new nativescript project

```bash
tns create nativescript_activity --template tns-template-blank-ts
cd nativescript_activity

```

1. update package.json and install

```bash
npm update
npm install

```

1. add android platform

```bash
tns platform add android

```


1. add the [extended activity](https://docs.nativescript.org/core-concepts/android-runtime/advanced-topics/extend-application-activity#extending-activity).

activity.android.ts 

```ts
import {setActivityCallbacks, AndroidActivityCallbacks} from "tns-core-modules/ui/frame";

@JavaProxy("org.myApp.MainActivity")
class Activity extends android.support.v7.app.AppCompatActivity {
    private _callbacks: AndroidActivityCallbacks;

    public onCreate(savedInstanceState: android.os.Bundle): void {
        if (!this._callbacks) {
            setActivityCallbacks(this);
        }

        this._callbacks.onCreate(this, savedInstanceState, super.onCreate);
    }

    public onSaveInstanceState(outState: android.os.Bundle): void {
        this._callbacks.onSaveInstanceState(this, outState, super.onSaveInstanceState);
    }

    public onStart(): void {
        this._callbacks.onStart(this, super.onStart);
    }

    public onStop(): void {
        this._callbacks.onStop(this, super.onStop);
    }

    public onDestroy(): void {
        this._callbacks.onDestroy(this, super.onDestroy);
    }

    public onBackPressed(): void {
        this._callbacks.onBackPressed(this, super.onBackPressed);
    }

    public onRequestPermissionsResult(requestCode: number, permissions: Array<string>, grantResults: Array<number>): void {
        this._callbacks.onRequestPermissionsResult(this, requestCode, permissions, grantResults, undefined /*TODO: Enable if needed*/);
    }

    public onActivityResult(requestCode: number, resultCode: number, data: android.content.Intent): void {
        this._callbacks.onActivityResult(this, requestCode, resultCode, data, super.onActivityResult);
    }
}

```


update webpack.config.js

webpack.config.js

```diff
@@ -14,6 +14,7 @@ module.exports = env => {
     const appComponents = [
         "tns-core-modules/ui/frame",
         "tns-core-modules/ui/frame/activity",
+        resolve(__dirname, "app/activity.android.ts"),
     ];
 
     const platform = env && (env.android && "android" || env.ios && "ios");
```

***

1. add android activity functions.

```ts
    public readonly MY_PERMISSION_REQUEST = 100;

    public onCreate(savedInstanceState: android.os.Bundle): void {
        if (!this._callbacks) {
            setActivityCallbacks(this);
        }

        this._callbacks.onCreate(this, savedInstanceState, super.onCreate);

        let intent: android.content.Intent = new android.content.Intent( ( <any> android.provider.Settings ).ACTION_HOME_SETTINGS );
        let activity = app.android.foregroundActivity || app.android.startActivity;
        // TODO: test android activity functions.
        // activity.startActivityForResult( intent, this.MY_PERMISSION_REQUEST );
    }
```


1. run nativescript android app

```bash
tns run android
```


***

error when adding this line.

```bash
activity.startActivityForResult( intent, this.MY_PERMISSION_REQUEST );
```