Thanks to asett and cstewart for the hint to look at chapter 33.
This is what I came up with.
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
…
final Intent callContact = new Intent(Intent.ACTION_DIAL);
mCallSuspectButton = (Button) v.findViewById(R.id.call_suspect);
mCallSuspectButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Uri number = Uri.parse(“tel:” + mCrime.getPhone()); // the “tel:” is needed to start activity
callContact.setData(number);
startActivity(callContact);
}
});
return v;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
...
} else if (requestCode == REQUEST_CONTACT && data != null) {
// Get the suspect's name.
String suspectName = getSuspectName(data);
mCrime.setSuspect(suspectName);
mSuspectButton.setText(suspectName);
// Get the suspect's mobile phone (cell phone) number.
if (hasContactPermission()) {
updateSuspectPhone();
} else {
// This will call onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults).
requestPermissions(CONTACTS_PERMISSIONS, REQUEST_CONTACTS_PERMISSIONS);
}
}
}
private String getSuspectName(Intent data) {
Uri contactUri = data.getData();
// Specify which fields you want your query to return values for
String[] queryFields = new String[] {
ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME
};
// Perform your query - the contactUri is like a "where" clause here.
Cursor c = getActivity().getContentResolver()
.query(contactUri, queryFields, null, null, null);
try {
// Double-check that you actually got results.
if (c.getCount() == 0) {
return null;
}
// Pull out the first column of the first row of data -
// that is your suspect's name
c.moveToFirst();
mSuspectId = c.getString(0);
String suspectName = c.getString(1);
return suspectName;
} finally {
c.close();
}
}
private String getSuspectPhoneNumber(String contactId) {
String suspectPhoneNumber = null;
// The content URI of the CommonDataKinds.Phone
Uri phoneContactUri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
// The columns to return for each row
String[] queryFields = new String[] {
ContactsContract.Data.CONTACT_ID,
ContactsContract.CommonDataKinds.Phone.NUMBER, // which is the default phone number.
ContactsContract.CommonDataKinds.Phone.TYPE,
};
// Selection criteria
String mSelectionClause = ContactsContract.Data.CONTACT_ID + " = ?";
// Selection criteria
String[] mSelectionArgs = {""};
mSelectionArgs[0] = contactId;
// Does a query against the table and returns a Cursor object
Cursor c = getActivity().getContentResolver()
.query(phoneContactUri,queryFields, mSelectionClause, mSelectionArgs, null );
try {
// Double-check that you actually got results.
if (c.getCount() == 0) {
return null;
}
while (c.moveToNext()) {
int phoneType = c.getInt(c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE));
if (phoneType == ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE) {
suspectPhoneNumber = c.getString(c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DATA));
break;
}
}
} finally {
c.close();
}
return suspectPhoneNumber;
}
private void updateSuspectPhone () {
String suspectPhoneNumber = getSuspectPhoneNumber(mSuspectId);
mCrime.setPhone(suspectPhoneNumber);
}
private boolean hasContactPermission() {
int result = ContextCompat.checkSelfPermission(getActivity(), CONTACTS_PERMISSIONS[0]);
return result == PackageManager.PERMISSION_GRANTED;
}
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
switch (requestCode) {
case REQUEST_CONTACTS_PERMISSIONS:
if (hasContactPermission()) {
updateSuspectPhone();
}
}
}
}
I haven’t included changed to he model to incorporate the suspect’s phone number. I’ll assume you know how to work this out. I did this to avoid introducing an annoying bug when making the phone call to the suspect. At the beginning I didn’t change the model but it became apparent that to focus on what I was supposed to be learning from this challenge I did need to change the model at some stage.
For runtime permissions - refer to https://developer.android.com/training/permissions/requesting.html
Cheers
