app与其它应用的交互

1.例如，下面是一个启动activity来选择联系人的例子：

static final int PICK_CONTACT_REQUEST = 1;  // The request code...private void pickContact() {    Intent pickContactIntent = new Intent(Intent.ACTION_PICK, Uri.parse("content://contacts"));    pickContactIntent.setType(Phone.CONTENT_TYPE); // Show user only contacts w/ phone numbers    startActivityForResult(pickContactIntent, PICK_CONTACT_REQUEST);}

2.查看网页:

     Uri webpage = Uri.parse("http://www.android.com");

Intent webIntent = new Intent(Intent.ACTION_VIEW, webpage);
   
  startActivity(webIntent);