Calling startActivity() from outside of an Activity context

Either

• cache the Context object via constructor in your adapter, or
• get it from your view.

Or as a last resort,

• add - FLAG_ACTIVITY_NEW_TASK flag to your intent:

_

myIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Edit - i would avoid setting flags as it will interfere with normal flow of event and history stack.

You can achieve it with addFlags instead of setFlags

myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

According to the documentation it does:

Add additional flags to the intent (or with existing flags value).

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EDIT

Be careful when you are using flags that you may change the history stack as Alex Volovoy's answer says:

...avoid setting flags as it will interfere with normal flow of event and history stack.