Default Intent for launcher Activity

Question

What is value of Intent of launcher activity

hello friends, I'm new to android. I'm working on android activity and Intent . As i did in my launcher activity

Intent in = new Intent(getApplicationContext(), SecondActivity.class);
startActivity(in);

and in second activity i use getIntent() method to get an reference of calling intent in OnCreate method as:

Intent in = getIntent();
if(in != null) //do something..

In second activity getIntent() method return the reference of calling intent . But when I Use getIntent() method in onCreate method of launcher activity, its value was not null. So what reference is passed to intent when we use getIntent() method in launcher activity

Answer 1

那么，当您单击app_icon时，Android OS会启动活动，它会浏览清单文件并找到启动器活动，然后启动它

Answer 2

Get the intent which has started your activity using the getIntent() method:

Intent intent = getIntent();

Your data is represented as strings, then you can use intent.getStringExtra(String name) method. In your case:

String id = intent.getStringExtra("id");
String name = intent.getStringExtra("name");