Я продолжаю получать следующий сбой при попытке сохранить имя контактов, выбранных мной из контактной книги, в текстовое окно. Я не уверен, что здесь не так, потому что Toast показывает имя контактов, хранящееся в строковой переменной 'name', но когда я пытаюсь TextView.setText (name), я получаю исключение с нулевым указателем?Хранение контактного имени в строке
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://com.android.contacts/contacts/lookup/0r1-4F314D4F514D314B454331/1 flg=0x1 }} to activity {com.example.calvin.pickmeup/com.example.calvin.pickmeup.Home}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(int)' on a null object reference
Главная:
private TextView Address;
private TextView selectedContact;
private String name;
private final int PICK_CONTACT = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
Button currentLocation = (Button) findViewById(R.id.currentLocation);
Button chooseTime = (Button) findViewById(R.id.chooseTime);
Button chooseContact = (Button) findViewById(R.id.chooseContact);
TextView Address = (TextView) findViewById(R.id.Address);
TextView selectedContact = (TextView) findViewById(R.id.selectedContact);
final TextView selectedTime = (TextView) findViewById(R.id.selectedTime);
currentLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Home.this, MapsActivity.class);
startActivity(intent);
}
});
chooseTime.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Calendar mcurrentTime = Calendar.getInstance();
int hour = mcurrentTime.get(Calendar.HOUR_OF_DAY);
int minute = mcurrentTime.get(Calendar.MINUTE);
TimePickerDialog mTimePicker;
mTimePicker = new TimePickerDialog(Home.this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
selectedTime.setText(selectedHour + ":" + selectedMinute);
}
}, hour, minute, true);//Yes 24 hour time
mTimePicker.setTitle("Select Time");
mTimePicker.show();
}
});
Bundle extras = getIntent().getExtras();
if(extras != null) {
String value = extras.getString("address");
Address.setText(value);
}
}
public void callContacts(View v){
Intent showContacts = new Intent (Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
startActivityForResult(showContacts,PICK_CONTACT);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == PICK_CONTACT) {
if(resultCode == ActionBarActivity.RESULT_OK){
Uri contactData = data.getData();
Cursor c = getContentResolver().query(contactData, null,null,null,null);
if (c.moveToFirst()){
name = c.getString(c.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME_PRIMARY));
Toast.makeText(this,"You've Picked:" + name, Toast.LENGTH_LONG).show();
selectedContact.setText(name);
}
}
}
}
Проблема с:
selectedContact.setText (имя);
CHange this 'TextView selectedContact = (TextView) findViewById (R.id.selectedContact) '; на 'selectedContact = (TextView) findViewById (R.id.selectedContact);' – Raghunandan