Constructors in Android Programming?

I have some values and want to pass with activity so that I can show in TextViews of Activity, I am unable to understand such a concept, so what should I do? Simply I want to make constructor but unable to understand it that how will it be done, I am new to 开发者_开发百科android programming, so needed help.

Start by reading the documentation at developer.android.com about intents and intent extras.

In android if you launched an activity there is a method called onCreate execute automatically.You can send values using Intent to the activity and can retrieve them in the Activity

The Activity (sub)class must have a default constructor without any parameters so that the system can instanciate it at run time.

To pass "parameters" to activities, you need to use the extra bundle of the intent.

Intent i = new Intent(this, MyActivity.class);
i.putExtra("com.sample.MyParameter", 666);
startActivity(i);

See Starting An Activity

If you want to pass one value then you can use intent but if you want to pass multiple values then using "Bundle" is best way.

Bundle bundel = new Bundle();
            bundel.putStringArray("key1",strings);
            bundel.putStringArray("key2",stringsofids);
            bundel.putString("key3", str31);
            bundel.putStringArray("key4",stringsbakup);
            bundel.putString("key5", str1);
            bundel.putString("key6", str4);