I have a working ListView, in a fragment and when the ListItem is clicked
I want to link the data to a new Activity. I am getting an error that my db object
cannot be cast to the db Cursor
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.Toast;
import com.mlaffan.giftpal.sqlite.adapter.PersonAdapter;
import com.mlaffan.giftpal.sqlite.db.DatabaseHelper;
import com.mlaffan.giftpal.sqlite.db.Person;
import java.util.ArrayList;
public class MainActivity extends FragmentActivity implements ActionBar.TabListener {
public PersonAdapter personAdapter;
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide fragments for each of the
* four primary sections of the app. We use a {@link android.support.v4.app.FragmentPagerAdapter}
* derivative, which will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
AppSectionsPagerAdapter mAppSectionsPagerAdapter;
/**
* The {@link ViewPager} that will display the four primary sections of the app, one at a
* time.
*/
ViewPager mViewPager;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DatabaseHelper dbHelp = new DatabaseHelper(getApplicationContext());
// Create the adapter that will return a fragment for each of the four primary sections
// of the app.
mAppSectionsPagerAdapter = new AppSectionsPagerAdapter(getSupportFragmentManager());
// Set up the action bar.
final ActionBar actionBar = getActionBar();
// Specify that the Home/Up button should not be enabled, since there is no hierarchical
// parent.
actionBar.setHomeButtonEnabled(false);
// Specify that we will be displaying tabs in the action bar.
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Set up the ViewPager, attaching the adapter and setting up a listener for when the
// user swipes between sections.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mAppSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// When swiping between different app sections, select the corresponding tab.
// We can also use ActionBar.Tab#select() to do this if we have a reference to the
// Tab.
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mAppSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by the adapter.
// Also specify this Activity object, which implements the TabListener interface, as the
// listener for when this tab is selected.
actionBar.addTab(
actionBar.newTab()
.setText(mAppSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to one of the primary
* sections of the app.
*/
public static class AppSectionsPagerAdapter extends FragmentPagerAdapter {
public AppSectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int i) {
switch (i) {
case 0:
// The first section of the app is the most interesting -- it offers
// a launchpad into the other demonstrations in this example application.
return new LaunchpadSectionFragment();
case 1:
return new AddPeopleFragment();
case 2:
return new PeopleSectionFragment();
default:
return new SnapGiftFragment();
// default:
// The other sections of the app are dummy placeholders.
// Fragment fragment = new DummySectionFragment();
// Bundle args = new Bundle();
// args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, i + 1);
// fragment.setArguments(args);
// return fragment;
}
}
@Override
public int getCount() {
return 4;
}
@Override
public CharSequence getPageTitle(int position) {
if (position == 0) {
return "Events";
} else if (position == 1) {
return "Add People";
} else if (position == 2) {
return "Your People";
} else {
return "Snap Gift";
}
}
}
/**
* A fragment that launches other parts of the demo application.
*/
public static class LaunchpadSectionFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_section_launchpad, container, false);
// Demonstration of navigating to external activities.
rootView.findViewById(R.id.demo_external_activity)
.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Create an intent that asks the user to pick a photo, but using
// FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET, ensures that relaunching
// the application from the device home screen does not return
// to the external activity.
Intent externalActivityIntent = new Intent(Intent.ACTION_PICK);
externalActivityIntent.setType("image/*");
externalActivityIntent.addFlags(
Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
startActivity(externalActivityIntent);
}
});
// link to Profiles Activitys.
rootView.findViewById(R.id.profiles_button)
.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(getActivity(), ProfileActivity.class);
startActivity(intent);
}
});
return rootView;
}
}
/**
* A fragment lets the user create a new profile.
*/
public static class AddPeopleFragment extends Fragment {
private String sex = "male";
private EditText firstName;
private EditText lastName;
private DatePicker birthday;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_add_people, container, false);
return rootView;
}
@Override
public void onViewCreated(View view, final Bundle bundle) {
super.onViewCreated(view, bundle);
firstName = (EditText) view.findViewById(R.id.firstName);
lastName = (EditText) view.findViewById(R.id.lastName);
RadioButton male = (RadioButton) view.findViewById(R.id.male);
RadioButton female = (RadioButton) view.findViewById(R.id.female);
birthday = (DatePicker) view.findViewById(R.id.datePicker);
Button button = (Button) view.findViewById(R.id.button);
male.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sex = "male";
}
});
female.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sex = "female";
}
});
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String fName = firstName.getText().toString();
String lName = lastName.getText().toString();
int day = birthday.getDayOfMonth();
int month = birthday.getMonth();
int year = birthday.getYear();
Person person = new Person();
person.setFirstName(fName);
person.setLastName(lName);
person.setSex(sex);
person.setBirthday("" + day + "/" + month + "/" + year);
DatabaseHelper dbHelper = new DatabaseHelper(getActivity().getApplicationContext());
dbHelper.addPerson(person);
Toast.makeText(getActivity(), "Profile added!", Toast.LENGTH_SHORT).show();
if (PeopleSectionFragment.adapter != null) {
PeopleSectionFragment.adapter.add(person);
}
}
});
}
}
/**
* A fragment that contains a list of profiles.
*/
public static class PeopleSectionFragment extends Fragment {
public static PersonAdapter adapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_people, container, false);
return rootView;
}
@Override
public void onViewCreated(View view, Bundle bundle) {
super.onViewCreated(view, bundle);
DatabaseHelper dbHelp = new
DatabaseHelper(getActivity().getApplicationContext());
ArrayList<Person> people = dbHelp.getPeople();
adapter = new PersonAdapter(getActivity().getApplicationContext(),
R.layout.fragment_people_list_item, people);
ListView listView = (ListView) getActivity().findViewById(R.id.list);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new ItemClicked());
}
class ItemClicked implements AdapterView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Person person = adapter.getItem(position);
Log.i("ItemClicked", person.getFirstName());
// When a listitem is clicked
Intent intent = new Intent(getActivity(), Profile.class);
Cursor cursor = (Cursor) person;
intent.putExtra("PERSON_ID", cursor.getInt(cursor.getColumnIndex("_id")));
startActivity(intent);
}
}
}
public static class SnapGiftFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_snap_gift, container, false);
return rootView;
}
}
}
This code seems to be where the trouble is;
Intent intent = new Intent(getActivity(), Profile.class);
Cursor cursor = (Cursor) person;
intent.putExtra("PERSON_ID", cursor.getInt(cursor.getColumnIndex("_id")));
startActivity(intent);
This is the error message;
05-05 12:27:54.575 2231-2231/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.mlaffan.giftpal, PID: 2231
java.lang.ClassCastException: com.mlaffan.giftpal.sqlite.db.Person cannot be cast to android.database.Cursor
at com.mlaffan.giftpal.MainActivity$PeopleSectionFragment$ItemClicked.onItemClick(MainActivity.java:306)
at android.widget.AdapterView.performItemClick(AdapterView.java:300)
at android.widget.AbsListView.performItemClick(AbsListView.java:1143)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3044)
at android.widget.AbsListView$3.run(AbsListView.java:3833)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Here is the target activity;
import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.widget.TextView;
import com.mlaffan.giftpal.sqlite.db.DatabaseHelper;
/**
* Created by Mark on 05/05/2015.
*/
public class Profile extends Activity {
protected TextView profileFirst;
protected TextView profileLast;
protected TextView profileBirthday;
protected TextView profileSex;
protected int profileId;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.profile_view);
profileId = getIntent().getIntExtra("PERSON_ID", 0);
SQLiteDatabase db = (new DatabaseHelper(this)).getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT _id, firstName, lastName, sex, birthday FROM people WHERE _id = ?",
new String[]{""+profileId});
if (cursor.getCount() == 1){
cursor.moveToFirst();
profileFirst = (TextView) findViewById(R.id.profileFirst);
profileFirst.setText(cursor.getString(cursor.getColumnIndex("firstName")));
profileLast = (TextView) findViewById(R.id.lastName);
profileLast.setText(cursor.getString(cursor.getColumnIndex("lastName")));
profileSex = (TextView) findViewById(R.id.profileSex);
profileSex.setText(cursor.getString(cursor.getColumnIndex("sex")));
profileBirthday = (TextView) findViewById(R.id.profileBirthday);
profileBirthday.setText(cursor.getString(cursor.getColumnIndex("birthday")));
}
}
}
Apologies if this is a messy one, if I need to give more information please ask.
Extend your Person class as Serializable and than you can try this way:
Person person = (Person)adapter.getItem(position);
Intent intent = new Intent(getActivity(), Profile.class);
intent.putExtra("person", person);
startActivity(intent);
Now in your Profile activity, do this way:
Person person;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.profile_view);
person = (Person) getIntent().getSerializableExtra("person");
profileFirst = (TextView) findViewById(R.id.profileFirst);
profileFirst.setText(person.firstName);
profileLast = (TextView) findViewById(R.id.lastName);
profileLast.setText(person.lastName");
...
...
}