How to Launch another application from My Android app Activity

Question

I want to start launch facebook from my application I have tried the below code

 public void text(String MessageBody) {
        
        public void text(String MessageBody) { 
        try { 
            Toast.makeText(getApplicationContext(), "salam its working", Toast.LENGTH_LONG).show(); 
            PackageManager pm = getPackageManager(); 
            if(MessageBody=="facebook") { 
                Intent intent = pm.getLaunchIntentForPackage("com.android.camera"); 
                startActivity(intent); 
            } 
        } catch(Exception e) { 
            Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show(); 
        }
    }

This is working fine from activity class but I am looking for a way to run the same code in non-activity class.

Answer 1

there was error of context ,now its working in when i start activity method in non activity class

    Context c;
    Toast.makeText(context, message1, Toast.LENGTH_LONG).show();
    PackageManager pm = context.getPackageManager();
    Intent intentt =pm.getLaunchIntentForPackage("com.facebook.katana");
    context.startActivity(intentt);

1