如何使用从服务传递的意图启动活动

Question

I have a Service which obtains a class name in a string variable and passes to sharedpreferences using this code:

    settings.edit().putString("class", activityClass).commit();

`

the service then launches my passprompt activity, which needs to read the String and launch the activity stored inside.

     try {

           SharedPreferences settings = getApplicationContext().getSharedPreferences("data", Context.MODE_PRIVATE);
           String c = settings.getString("class", "null");
           Intent newIntent= new Intent(passprompt.this, Class.forName(c));
           newIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
           startActivity(newIntent);

        }
       catch  (ClassNotFoundException e) {
       }

however the intended activity is not launching when expected

Answer 1

You may try this ,

1. If this activity with in your app Get the fully qualified Activity class name and put it into intent extra as follows,

     Intent newIntent= new Intent(Passprompt.this, Class.forName("your activity class name"))); newIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(newIntent); 

2. If this is activity within another applicatino

     Intent intent = new Intent(Intent.ACTION_MAIN); intent.setComponent(new ComponentName("packagename", "packagename.launh_activity_name")); startActivity(intent);