intent.putExtra不工作

Question

I need to pass information between two activities, but for some reason the information isn't sent / recieved.

LogCat doesn't give me any errors. The dubugger clearly shows something is added to the intent (variabl: mExtras), but it's hard to interpret exactly what is added. After that it gives me "source not found" and doesn't help me further.

But first things first. Am I doing things right so far?

Sending:

Intent intent = new Intent ( this, TaskListActivity.class );
intent.putExtra ( ProjectManager.ID, mId.toString () );
startActivity ( intent );

Recieving:

Intent intent = getIntent ();
mId = UUID.fromString ( intent.getStringExtra ( ProjectManager.ID ) );

Answer 1

add following code after intent:

Bundle extras = intent.getExtras();
String exampleString = extras.getString(ProjectManager.ID);

Answer 2

what is ProjectManager.ID ?, you should pass same unique key while recieving data from putExtra even way of receiving data is wrong, check below code:

Sending:

Intent intent = new Intent ( this, TaskListActivity.class );
intent.putExtra (ProjectManager.ID, mId.toString () );
startActivity ( intent );

Recieving:

Bundle extras = intent.getExtras();
    if(extras!=null){
  String _Str = extras.getString(ProjectManager.ID);
}

Answer 3

Try This to Receive Extra:

Bundle extras = getIntent().getExtras(); 
String id;

if (extras != null) {
    id= extras.getString(key);

}

Answer 4

In FirstActivity.java write these code.

 Intent i = new Intent(FirstActivity.this,SecondActivity.class);
 i.putExtra("KEY",value);
 startActivity(i);

In SecondActivity.java:

Bundle extras=getIntent().getExtras();
String name=extras.getString("key"); //if data you are sending is String.
int i=extras.getInt("key"); //if data you are sending is integer.

Answer 5

To retrieve the extras in the new activity:

String valueOfExtra;
Intent i = getIntent();
//check first
if(i.hasExtra("extra1")){
  valueOfExtra = i.getStringExtra("extra1");
}