Sending arrays with Intent.putExtra

问题:

I have an array of integers in the activity A:

int array[] = {1,2,3};

And I want to send that variable to the activity B, so I create a new intent and use the putExtra method:

Intent i = new Intent(A.this, B.class);
i.putExtra(\"numbers\", array);
startActivity(i);

In the activity B I get the info:

Bundle extras = getIntent().getExtras();
int arrayB = extras.getInt(\"numbers\");

But this is not really sending the array, I just get the value \'0\' on the arrayB. I\'ve been looking for some examples but I didn\'t found anything so.

回答1:

You are setting the extra with an array. You are then trying to get a single int.

Your code should be:

int[] arrayB = extras.getIntArray(\"numbers\");

回答2:

This code sends array of integer values

Initialize array List

List<Integer> test = new ArrayList<Integer>();

Add values to array List

test.add(1);
test.add(2);
test.add(3);
Intent intent=new Intent(this, targetActivty.class);

Send the array list values to target activity

intent.putIntegerArrayListExtra(\"test\", (ArrayList<Integer>) test);
startActivity(intent);

here you get values on targetActivty

Intent intent=getIntent();
ArrayList<String> test = intent.getStringArrayListExtra(\"test\");

回答3:

final static String EXTRA_MESSAGE = \"edit.list.message\";

Context context;
public void onClick (View view)
{   
    Intent intent = new Intent(this,display.class);
    RelativeLayout relativeLayout = (RelativeLayout) view.getParent();

    TextView textView = (TextView) relativeLayout.findViewById(R.id.textView1);
    String message = textView.getText().toString();

    intent.putExtra(EXTRA_MESSAGE,message);
    startActivity(intent);
}