Problem with ArrayList

Problem with ArrayList - java

I am fairly new to Java programming and was following a tutorial located here: http://coenraets.org/blog/android-samples/androidtutorial/
Where I copied the code I am having a problem with here: http://code.google.com/p/androidtutorial/source/browse/trunk/%20androidtutorial/EmployeeDirectory6/src/samples/employeedirectory/EmployeeDetails.java
EDIT: Thank You all. Thanks to #adamcodes for pointing out I totally missed that link where he put out the source code. It looks like he forgot to include that link in the step by step tutorial.
At about 25 lines down I'm getting an error at
protected ArrayList<EmployeeAction> actions;
which says "EmployeeAction cannot be resolved to a type" My question is does the class EmployeeAction have to be created
actions = new ArrayList<EmployeeAction>();
Even if I put "actions = new ArrayList();" in my code? If so what should the class contain?
package samples.employeedirectory;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class EmployeeDetails extends ListActivity {
protected TextView employeeNameText;
protected TextView titleText;
protected ArrayList<EmployeeAction> actions;
protected EmployeeActionAdapter adapter;
protected int employeeId;
protected int managerId;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.employee_details);
employeeId = getIntent().getIntExtra("EMPLOYEE_ID", 0);
SQLiteDatabase db = (new DatabaseHelper(this)).getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT emp._id, emp.firstName, emp.lastName, emp.title, emp.officePhone, emp.cellPhone, emp.email, emp.managerId, mgr.firstName managerFirstName, mgr.lastName managerLastName FROM employee emp LEFT OUTER JOIN employee mgr ON emp.managerId = mgr._id WHERE emp._id = ?",
new String[]{""+employeeId});
if (cursor.getCount() == 1)
{
cursor.moveToFirst();
employeeNameText = (TextView) findViewById(R.id.employeeName);
employeeNameText.setText(cursor.getString(cursor.getColumnIndex("firstName")) + " " + cursor.getString(cursor.getColumnIndex("lastName")));
titleText = (TextView) findViewById(R.id.title);
titleText.setText(cursor.getString(cursor.getColumnIndex("title")));
actions = new ArrayList<EmployeeAction>();
String officePhone = cursor.getString(cursor.getColumnIndex("officePhone"));
if (officePhone != null) {
actions.add(new EmployeeAction("Call office", officePhone, EmployeeAction.ACTION_CALL));
}
String cellPhone = cursor.getString(cursor.getColumnIndex("cellPhone"));
if (cellPhone != null) {
actions.add(new EmployeeAction("Call mobile", cellPhone, EmployeeAction.ACTION_CALL));
actions.add(new EmployeeAction("SMS", cellPhone, EmployeeAction.ACTION_SMS));
}
String email = cursor.getString(cursor.getColumnIndex("email"));
if (email != null) {
actions.add(new EmployeeAction("Email", email, EmployeeAction.ACTION_EMAIL));
}
managerId = cursor.getInt(cursor.getColumnIndex("managerId"));
if (managerId>0) {
actions.add(new EmployeeAction("View manager", cursor.getString(cursor.getColumnIndex("managerFirstName")) + " " + cursor.getString(cursor.getColumnIndex("managerLastName")), EmployeeAction.ACTION_VIEW));
}
cursor = db.rawQuery("SELECT count(*) FROM employee WHERE managerId = ?",
new String[]{""+employeeId});
cursor.moveToFirst();
int count = cursor.getInt(0);
if (count>0) {
actions.add(new EmployeeAction("View direct reports", "(" + count + ")", EmployeeAction.ACTION_REPORTS));
}
adapter = new EmployeeActionAdapter();
setListAdapter(adapter);
}
}
public void onListItemClick(ListView parent, View view, int position, long id) {
EmployeeAction action = actions.get(position);
Intent intent;
switch (action.getType()) {
case EmployeeAction.ACTION_CALL:
Uri callUri = Uri.parse("tel:" + action.getData());
intent = new Intent(Intent.ACTION_CALL, callUri);
startActivity(intent);
break;
case EmployeeAction.ACTION_EMAIL:
intent = new Intent(Intent.ACTION_SEND);
intent.setType("plain/text");
intent.putExtra(Intent.EXTRA_EMAIL, new String[]{action.getData()});
startActivity(intent);
break;
case EmployeeAction.ACTION_SMS:
Uri smsUri = Uri.parse("sms:" + action.getData());
intent = new Intent(Intent.ACTION_VIEW, smsUri);
startActivity(intent);
break;
case EmployeeAction.ACTION_REPORTS:
intent = new Intent(this, DirectReports.class);
intent.putExtra("EMPLOYEE_ID", employeeId);
startActivity(intent);
break;
case EmployeeAction.ACTION_VIEW:
intent = new Intent(this, EmployeeDetails.class);
intent.putExtra("EMPLOYEE_ID", managerId);
startActivity(intent);
break;
}
}
class EmployeeActionAdapter extends ArrayAdapter<EmployeeAction> {
EmployeeActionAdapter() {
super(EmployeeDetails.this, R.layout.action_list_item, actions);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
EmployeeAction action = actions.get(position);
LayoutInflater inflater = getLayoutInflater();
View view = inflater.inflate(R.layout.action_list_item, parent, false);
TextView label = (TextView) view.findViewById(R.id.label);
label.setText(action.getLabel());
TextView data = (TextView) view.findViewById(R.id.data);
data.setText(action.getData());
return view;
}
}
}

Java is statically typed, and everything you want to refer to at compile time needs to exist. So yes - you have to create the EmployeeAction, if you need it. (And you need to import it with import yourpackage.EmployeeAction; at the top of the class)
The type definition if the list <EmployeeAction> is there to enforce compile time safety for the elements of the list. It means "you can only put instances of EmployeeAction in this collection". This is useful when later you access the collection - the compiler can guarantee that the list contains only EmployeeAction instances

Yes it definitly have to exists (EmployeeAction class). For what it should contains, I'd say probably a constructor that take parameters like these : (String location, String phone, EmployeeAction.ACTION*) and then setters and getters for these values.

EmplyeeAction is a not Java known class. Then, it could be imported (if it exists) or created.

The list is irrelevant here. A few lines down, your code says:
actions.add(new EmployeeAction("Call office", officePhone, EmployeeAction.ACTION_CALL));
Yes, you do need a class EmployeeAction to compile that code. It's probably introduced in a part of the tutorial you overlooked or skipped.

you have to have a EmployeeAction class.
since you say that you are new to java it will be good if go through this tutorial

Related

getResources on a null object in an android project

I have a method in a library I am creating for a series of apps I am doing. This method will display an input dialog for the user to input a string entry. I am writing this project for android using android studio, and I am writing it in Java.
Here is the Logcat:
2020-11-17 00:44:23.819 6758-6758/com.phoenixhosman.launcher E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.phoenixhosman.launcher, PID: 6758
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at android.content.ContextWrapper.getResources(ContextWrapper.java:91)
at android.view.ContextThemeWrapper.getResourcesInternal(ContextThemeWrapper.java:127)
at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:121)
at android.content.Context.getString(Context.java:594)
at com.phoenixhosman.phoenixlib.ActivityPhoenixLib.InputDialog(ActivityPhoenixLib.java:97)
at com.phoenixhosman.launcher.ActivityHome.onClick(ActivityHome.java:151)
at android.view.View.performClick(View.java:6603)
at android.view.View.performClickInternal(View.java:6576)
at android.view.View.access$3100(View.java:780)
at android.view.View$PerformClick.run(View.java:26090)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6714)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:503)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)
Here in my ActivityHome.java file:
/*
The Phoenix Hospitality Management System
Launcher App Source Code
Main Activity Code File
Copyright (c) 2020 By Troy Marker Enterprises
All Rights Under Copyright Reserved
The code in this file was created for use with the Phoenix Hospitality Management System (PHMS).
Use of this code outside the PHMS is strictly prohibited.
*/
package com.phoenixhosman.launcher;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import androidx.annotation.NonNull;
import com.phoenixhosman.phoenixapi.*;
import com.phoenixhosman.phoenixlib.ProviderUser;
import com.phoenixhosman.phoenixlib.ActivityPhoenixLib;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.concurrent.atomic.AtomicInteger;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import static com.phoenixhosman.phoenixapi.ManagerSecurityApi.*;
/**
* This activity display links to the other apps in the Phoenix Hospitality
* system, and use authentication to only show those that the user has
* permission to use.
* #author Troy L. Marker
* #version 1.0.0
* #since 0.5.0
*/
public class ActivityHome extends Activity implements View.OnClickListener
{
private String strCoName;
private String strApiUrl;
private String strLockPass;
private EditText etUsername;
private EditText etPassword;
final private static int REQUEST_CODE_1 = 1;
final ActivityPhoenixLib Phoenix = new ActivityPhoenixLib();
/**
* This method will create the activity, read content to display, and show the main activity screen
* Used when the activity is (re)created.
* #param savedInstanceState current saved instance state
*/
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
View decorView = getWindow().getDecorView();
decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);
setContentView(R.layout.activity_home);
etUsername = findViewById(R.id.etUsername);
etPassword = findViewById(R.id.etPassword);
TextView tvWarning = findViewById(R.id.tvWarning);
Button btnLogon = findViewById(R.id.btnLogon);
Button btnLockPass = findViewById(R.id.btnLockPass);
btnLogon.setOnClickListener(this);
btnLockPass.setOnClickListener(this);
#SuppressLint("Recycle") Cursor cursor = getContentResolver().query(Uri.parse("content://com.phoenixhosman.installer.ProviderSettings/settings"), null, null, null, null, null);
assert cursor != null;
if(cursor.moveToFirst()) {
while(!cursor.isAfterLast()) {
strCoName = cursor.getString(cursor.getColumnIndex("coname"));
strApiUrl = cursor.getString(cursor.getColumnIndex("apiurl"));
strLockPass = cursor.getString(cursor.getColumnIndex("lockpass"));
cursor.moveToNext();
}
new ManagerSecurityApi(strApiUrl);
tvWarning.setText(getString(R.string.warning, rtrim(strCoName)));
} else {
Phoenix.Error(getApplicationContext(),getString(R.string.required), false);
}
}
/**
* Override of the onBackPress method from the parent class
* This disables the back button on the device.
*/
#Override
public void onBackPressed() {
Phoenix.Error(ActivityHome.this, getString(R.string.disabled, getString(R.string.back)),false);
}
/**
* This method overrides the parents click listner.
* #param v the view clicked.
*/
#Override
public void onClick(View v) {
Button button = (Button)v;
String buttonText = button.getText().toString();
if (buttonText.equals(getString(R.string.login))) {
if (etUsername.getText().toString().isEmpty() || etPassword.getText().toString().isEmpty()) {
Phoenix.Error(ActivityHome.this, getString(R.string.both_required,getString(R.string.username_password)), false);
} else {
Call<String> call = getInstance().getApi().login(etUsername.getText().toString(), etPassword.getText().toString());
call.enqueue(new Callback<String>() {
#Override
public void onResponse(#NonNull Call<String> call, #NonNull Response<String> response) {
String body = response.body();
try {
assert body != null;
JSONObject obj = new JSONObject(body);
if (obj.optBoolean("success")) {
etUsername.setText("");
etPassword.setText("");
etUsername.requestFocus();
getContentResolver().delete(ProviderUser.CONTENT_URI, null, null);
ContentValues values = new ContentValues();
values.put(ProviderUser.name, obj.optString("username"));
values.put(ProviderUser.grade, obj.optInt("grade"));
values.put(ProviderUser.gradename, obj.optString("gradename"));
values.put(ProviderUser.department, obj.optInt("department"));
values.put(ProviderUser.departmentname, obj.optString("departmentname"));
getContentResolver().insert(ProviderUser.CONTENT_URI, values);
Phoenix.Success(ActivityHome.this, obj.optString("message"), 5);
showApps(obj.optString("username"), obj.optInt("grade"), obj.optString("gradename"), obj.optInt("department"), obj.optString("departmentname"));
} else {
Phoenix.Error(getApplicationContext(), getString(R.string.user_not), false);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public void onFailure(#NonNull Call<String> call, #NonNull Throwable t) {
}
});
}
} else if (buttonText.equals(getString(R.string.admin_access))) {
String LockPass = Phoenix.InputDialog(ActivityHome.this.getApplicationContext(), getString(R.string.input_prompt, getString(R.string.enter_lock_pass)));
if (LockPass.equals(strLockPass)) {
this.getPackageManager().clearPackagePreferredActivities(this.getPackageName());
finish();
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
} else {
throw new IllegalStateException(getString(R.string.unexpected) + v.getId());
}
}
/**
* This method will call the App Display Activity
*/
private void showApps(String username, Integer grade, String gradename, Integer department, String departmentname){
Intent intent = new Intent(ActivityHome.this.getApplicationContext(), ActivityApp.class);
intent.putExtra("username", username);
intent.putExtra("grade", String.valueOf(grade));
intent.putExtra("gradename", gradename);
intent.putExtra("department", String.valueOf(department));
intent.putExtra("departmentname", departmentname);
startActivityForResult(intent, REQUEST_CODE_1);
}
/**
* Function to trim whitespace from the end of a string.
* #param s the string to trim
* #return the trimmed string
*/
#NonNull
public static String rtrim(String s) {
AtomicInteger i;
i = new AtomicInteger(s.length() - 1);
while (i.get() >= 0 && Character.isWhitespace(s.charAt(i.get()))) {
i.getAndDecrement();
}
return s.substring(0, i.get() +1);
}
}
And finially, here is my ActivityPhoenixLib.java file:
package com.phoenixhosman.phoenixlib;
import android.app.Activity;
import android.content.Context;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import static android.view.View.inflate;
public class ActivityPhoenixLib extends Activity {
/**
* While not needed, this constructor makes calls to the member method of the class
* to clear errors in the editor.
*/
public ActivityPhoenixLib() {
Error(this, "", false);
Success(this,"",0);
String dummy = InputDialog(this, "");
if (dummy.equals("test")) {
}
}
/**
* This method displays a dialog box with an error message and a close button.
* #param strError the error message to display
*/
public void Error(Context context, #NonNull String strError, Boolean exit) {
if (strError.equals("")) {
return;
}
AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);
View view = inflate(context, R.layout.dialog_error, null);
Button btnExit = view.findViewById(R.id.btnExitButton);
Button btnError = view.findViewById(R.id.btnErrorMessage);
btnError.setText(strError);
mBuilder.setView(view);
AlertDialog dialog = mBuilder.create();
dialog.setCanceledOnTouchOutside(false);
dialog.setCancelable(false);
dialog.show();
btnExit.setOnClickListener(v -> {
dialog.dismiss();
if (exit) System.exit(0);
});
}
/**
* This method displays a dialog box with a message and a close button.
* It also has an auto close function to auto close after a specified number of seconds.
* #param strMessage the message to display
*/
public void Success(Context context, #NonNull String strMessage, Integer autoclose) {
if (strMessage.equals("")) {
return;
}
AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);
View view = inflate(context, R.layout.dialog_success, null);
Button btnExit = view.findViewById(R.id.btnButton);
Button btnError = view.findViewById(R.id.btnMessage);
btnError.setText(strMessage);
mBuilder.setView(view);
AlertDialog dialog = mBuilder.create();
dialog.setCanceledOnTouchOutside(false);
dialog.setCancelable(false);
dialog.show();
btnExit.setOnClickListener(v -> dialog.dismiss());
new Handler().postDelayed(dialog::dismiss, autoclose * 1000);
}
/**
* This method show an input box to get string input from the user.
* #param strPrompt - the dialog prompt
*/
public String InputDialog(Context context, String strPrompt) {
if (strPrompt.equals("")) {
return "";
}
AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);
final String[] retval = new String[1];
View view = inflate(context, R.layout.dialog_input, null);
TextView txtPrompt = view.findViewById(R.id.txtPrompt);
EditText edtLockPass = view.findViewById(R.id.edtLockPass);
Button btnEnter = view.findViewById(R.id.btnEnter);
--> Line 97 <-- txtPrompt.setText(getString(R.string.input_prompt, strPrompt));
mBuilder.setView(view);
AlertDialog dialog = mBuilder.create();
dialog.setCanceledOnTouchOutside(false);
dialog.setCancelable(false);
dialog.show();
btnEnter.setOnClickListener(v -> {
if (edtLockPass.getText().toString().equals("")) {
retval[0] = "";
} else {
retval[0] = edtLockPass.getText().toString();
}
});
dialog.dismiss();
return retval[0];
}
}
I have tried several different things. I am going on the assumption that the context is not being passed to the InputDialog function, and I have tried different way of pass the context to the function: this. ActivityHome.this, getApplicationContext, and none of them seemed to work. Is there something I have nbot considered? Any help would be appreciated. Thanks.
Edit-In responce to one of the comments about my getString usage, on the page linked here my usage is documented, the second string is is the argument object for the formatting string.
Edit 2: I also tried to use a single parameter getSting on the line in question, and got the smae error.

display sqlite data on a view who to textview form

I have copy this code on internet and i want to display sqlite data in a new activity when a user click on item in recycleview under textview form.
This mainActivity:
package com.herprogramacion.crunch_expenses.ui;
import android.app.ActivityOptions;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import com.herprogramacion.crunch_expenses.utils.Utilidades;
import com.herprogramacion.crunch_expenses.R;
import com.herprogramacion.crunch_expenses.provider.ContractParaGastos;
import com.herprogramacion.crunch_expenses.sync.SyncAdapter;
public class MainActivity extends AppCompatActivity
implements LoaderManager.LoaderCallbacks<Cursor> {
private RecyclerView recyclerView;
private LinearLayoutManager layoutManager;
private AdaptadorDeGastos adapter;
private TextView emptyView;
private Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setToolbar();
recyclerView = (RecyclerView) findViewById(R.id.reciclador);
DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(), DividerItemDecoration.VERTICAL);
dividerItemDecoration.setDrawable(ContextCompat.getDrawable(getBaseContext(), R.drawable.recycle_divider));
recyclerView.addItemDecoration(dividerItemDecoration);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
adapter = new AdaptadorDeGastos(this);
recyclerView.setAdapter(adapter);
emptyView = (TextView) findViewById(R.id.recyclerview_data_empty);
getSupportLoaderManager().initLoader(0, null, this);
SyncAdapter.inicializarSyncAdapter(this);
}
private void setToolbar() {
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
}
public void onClickFab(View v) {
Intent intent = new Intent(this, InsertActivity.class);
if (Utilidades.materialDesign())
startActivity(intent,
ActivityOptions.makeSceneTransitionAnimation(this).toBundle());
else startActivity(intent);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_sync) {
SyncAdapter.sincronizarAhora(this, false);
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
emptyView.setText("Cargando datos...");
// Consultar todos los registros
return new CursorLoader(
this,
ContractParaGastos.CONTENT_URI,
null, null, null, null);
}
#Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
adapter.swapCursor(data);
emptyView.setText("");
}
#Override
public void onLoaderReset(Loader<Cursor> loader) {
adapter.swapCursor(null);
}
}
and that is a Database:
package com.herprogramacion.crunch_expenses.provider;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
/**
* Clase envoltura para el gestor de Bases de datos
*/
class DatabaseHelper extends SQLiteOpenHelper {
public DatabaseHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, name, factory, version);
}
public void onCreate(SQLiteDatabase database) {
createTable(database); // Crear la tabla "gasto"
}
/**
* Crear tabla en la base de datos
*
* #param database Instancia de la base de datos
*/
private void createTable(SQLiteDatabase database) {
String cmd = "CREATE TABLE " + ContractParaGastos.GASTO + " (" +
ContractParaGastos.Columnas._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
ContractParaGastos.Columnas.MONTO + " TEXT, " +
ContractParaGastos.Columnas.ETIQUETA + " TEXT, " +
ContractParaGastos.Columnas.FECHA + " TEXT, " +
ContractParaGastos.Columnas.DESCRIPCION + " TEXT," +
ContractParaGastos.Columnas.ID_REMOTA + " TEXT UNIQUE," +
ContractParaGastos.Columnas.ESTADO + " INTEGER NOT NULL DEFAULT "+ ContractParaGastos.ESTADO_OK+"," +
ContractParaGastos.Columnas.PENDIENTE_INSERCION + " INTEGER NOT NULL DEFAULT 0)";
database.execSQL(cmd);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
try { db.execSQL("drop table " + ContractParaGastos.GASTO); }
catch (SQLiteException e) { }
onCreate(db);
}
}
Somebody help me to diplay this data in a new view please!
ps:i'm a french speaking, excuse my poor english. But i work it.

my real problem is how to write a code who take sqlite data and save
this in new activity.
As you have a column defined as name INTEGER PRIMARY KEY AUTOINCREMENT this column will uniquely identify the row in the table. As such, it's basically a matter of ascertaining this value and passing it to the activity that is called. A convenient way of doing this is by passing the value via an Intent Extra.
Note! in all likelihood you don't need AUTOINCREMENT, name INTEGER PRIMARY KEY, will still give you a unique row identifier, but without the overheads and restrictions of using AUTOINCREMENT
An Intent Extra is created using the the Intent's put method, it takes a key to identify the data/value and the data/value itself.
Here's an example of using Intent Extras :-
Intent intent = new Intent(this,DBTableDataViewActivity.class);
intent.putExtra(DBTableDataViewActivity.INTENTKEY_DATABASENAME,mCurrentDB.getname());
intent.putExtra(DBTableDataViewActivity.INTENTKEY_DATABASEPATH,mCurrentDB.getPath());
intent.putExtra(DBTableDataViewActivity.INTENTKEY_TABLENAME,tablebame);
startActivity(intent);
The first line creates an Intent object instance, referred to as intent, that will be used to start the DBtableDataViewActivity (the other activity).
The next three lines add Extras to the Intent (Strings in this case for the Database name, it's path and the Table name). The first parameter of the putExtra method is the key, as a String, to identify the Extra. The second parameter is the value to be sent (in your case you would put a long).
The last line starts the Activity according to the Intent.
The keys, in this case are based upon :-
public static final String INTENTKEY_DATABASEPATH = "ik_dbpath";
public static final String INTENTKEY_DATABASENAME = "ik_dbname";
public static final String INTENTKEY_TABLENAME = "ik_tablename";
In the called Activity you retrieve the Intents e.g. :-
Intent callingintent = this.getIntent();
mDatabaseName = callingintent.getStringExtra(INTENTKEY_DATABASENAME);
mDatabasepath = callingintent.getStringExtra(INTENTKEY_DATABASEPATH);
mTableName = callingintent.getStringExtra(INTENTKEY_TABLENAME);
One thing to note, as you will likely be sending a long is that you have to include a default value, as a second parameter, that is used if the Extra doesn't exist.
As a unique row identifier (rowid) should not be 0 (note you can force a rowid to be 0), then using a default value of 0 may suit.
Your solution, after you have obtained the unique row identifier (for this example into a long variable named id) would be along the lines of:-
Invoking Activity
Intent intent = new Intent(this,NewActivity.class);
intent.putExtra("ROWID_INTENT_KEY",id);
startActivity(intent);
NewActivity
....
onCreate() {
....
long passed_id = this.getIntent().getLongExtra("ROWID_INTENT_KEY",0);
if (passed_id > 0) {
..... do you stuff here
} else {
.... handle no valid id passed
}
}
In the above you could then retrieve the other relevant data by querying the database. An alternative could be to pass the other data via additional Intent Extras.
Here's a more Complex example:-
The Invoking Activity
invokes the ProductsAddEditActivity, passing multiple values via Intent Extras.
public void productEdit() {
Intent intent = new Intent(this,ProductsAddEditActivity.class);
intent.putExtra(
StandardAppConstants.INTENTKEY_CALLINGACTIVITY,
THIS_ACTIVITY
);
intent.putExtra(
StandardAppConstants.INTENTKEY_CALLINGMODE,
StandardAppConstants.CM_EDIT
);
intent.putExtra(StandardAppConstants.INTENTKEY_PRODUCTID,
plcsr.getLong(
plcsr.getColumnIndex(PRODUCTID_COLUMN)
));
intent.putExtra(StandardAppConstants.INTENTKEY_PRODUCTNAME,
plcsr.getString(
plcsr.getColumnIndex(PRODUCTNAME_COLUMN
)
));
intent.putExtra(StandardAppConstants.INTENTKEY_STORAGEID,
plcsr.getLong(
plcsr.getColumnIndex(PRODUCTSTORAGEREF_COLUMN)
));
intent.putExtra(StandardAppConstants.INTENTKEY_STORAGEORDER,
plcsr.getInt(
plcsr.getColumnIndex(PRODUCTSTORAGEORDER_COLUMN)
));
intent.putExtra(menucolorcode,passedmenucolorcode);
startActivity(intent);
}
in the ProductsAddeditActivity (effecctively in the onCreate method) :-
caller = getIntent().getStringExtra(
StandardAppConstants.INTENTKEY_CALLINGACTIVITY
);
calledmode = getIntent().getIntExtra(
StandardAppConstants.INTENTKEY_CALLINGMODE,
StandardAppConstants.CM_CLEAR
);
passedstorageid = 0;
if (calledmode == StandardAppConstants.CM_EDIT) {
passedproductid = getIntent().getLongExtra(
StandardAppConstants.INTENTKEY_PRODUCTID,
0
);
passedproductname = getIntent().getStringExtra(
StandardAppConstants.INTENTKEY_PRODUCTNAME
);
inputproductname.setText(passedproductname);
passedorder = getIntent().getIntExtra(
StandardAppConstants.INTENTKEY_STORAGEORDER,0
);
inputproductorder.setText(Integer.toString(passedorder));
passedstorageid = getIntent().getLongExtra(
StandardAppConstants.INTENTKEY_STORAGEID,0
);
passedstoragname = getIntent().getStringExtra(
StandardAppConstants.INTENTKEY_STORAGENAME
);
inputproductfilter.setText("");
this.setTitle(getResources().getString(R.string.productseditlabel));
}
stcsr.moveToPosition(-1);
while (stcsr.moveToNext()) {
if (stcsr.getLong(stcsr.getColumnIndex(
STORAGEID_COLUMN
)) == passedstorageid) {
inputproductstorage_spinner.setSelection(stcsr.getPosition());
break;
}
}

Have at least one item selected in Android MultiSelectListPreference

I have search now for hours through the internet and have found nothing substantial so far. The thing that I want to do is a multi choice preference view, that disables the last item and reenables it, if it is not alone anymore.
I through so far about taking the super class force read the private variables in there to write my own onPrepareDialogBuilder(AlertDialog.Builder builder). Which is configuring its own OnMultiChoiceClickListener that jumps in, in the moment where has only one item left. The problem here is, that I use a bad practice force read of a private variable and that I have so far no idea how to get the checkbox item and how to disable it. But I think looking even deeper into the Android SDK will solve this problem.
At the end, if nothing works, solving the problem with doing an overwrite the OnPreferenceChangeListener to display a toast if the user has less than one item selected. But user friendliness is a high value, that needs to be earned and that often isn't easy.
Thx.
import android.content.Context;
import android.preference.MultiSelectListPreference;
import android.util.AttributeSet;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import georg.com.flironetest_01.Variables.Units;
/**
* Created by Georg on 16/03/16.
*/
public class UnitMultipleSelectorPreference extends MultiSelectListPreference {
public UnitMultipleSelectorPreference(Context context, AttributeSet attrs) {
super(context, attrs);
List<CharSequence> humanU = new ArrayList<>();
List<CharSequence> machineU = new ArrayList<>();
Units[] all = Units.values(); // Units is a enum with a rewriten to string statement.
for (Units elem : all) {
humanU.add(elem.toString());
machineU.add(elem.name());
}
setEntries(humanU.toArray(new CharSequence[humanU.size()]));
setEntryValues(machineU.toArray(new CharSequence[machineU.size()]));
Set<String> mU = new HashSet<>();
mU.add(Units.C.name());
mU.add(Units.K.name());
setDefaultValue(mU);
}
}

Okay. To answer my own question here after the motto "self is the man": I ended up with programming my own preference panel. Below is the code. If somebody likes to look over it and give some times how to make it even more stable: feel free.
But to sum up what I did: I created my own ArrayAdapter. But DialogPreference didn't allowed me to create my own multi selector. You need to change the final dialog fragment to create a working multi selector list (see here: https://stackoverflow.com/a/17907379/5759814). That is not an easy task if you work with the DialogPreferences. The reason is these few amounts of code:
/**
* Shows the dialog associated with this Preference. This is normally initiated
* automatically on clicking on the preference. Call this method if you need to
* show the dialog on some other event.
*
* #param state Optional instance state to restore on the dialog
*/
protected void showDialog(Bundle state) {
Context context = getContext();
mWhichButtonClicked = DialogInterface.BUTTON_NEGATIVE;
mBuilder = new AlertDialog.Builder(context)
.setTitle(mDialogTitle)
.setIcon(mDialogIcon)
.setPositiveButton(mPositiveButtonText, this)
.setNegativeButton(mNegativeButtonText, this);
View contentView = onCreateDialogView();
if (contentView != null) {
onBindDialogView(contentView);
mBuilder.setView(contentView);
} else {
mBuilder.setMessage(mDialogMessage);
}
onPrepareDialogBuilder(mBuilder);
getPreferenceManager().registerOnActivityDestroyListener(this);
// Create the dialog
final Dialog dialog = mDialog = mBuilder.create();
if (state != null) {
dialog.onRestoreInstanceState(state);
}
if (needInputMethod()) {
requestInputMethod(dialog);
}
dialog.setOnDismissListener(this);
dialog.show();
}
As you can see here is a method triggered to change my dialog builder with onPrepareDialogBuilder, but it doesn't seem like that there is any other function triggered afterwards, that would allow me to change the dialog directly after its creation. And the second idea of changing the onPrepareDialogBuilder so that I can init everything there, doesn't really help, because I end up with displayed dialog windows. That lead me to my decision of creating my completely own Preference class. With that decision I loose all those nice prepared functions like onRestoreInstanceState and Co, but I now have an application with a much more persistent flow, that doesn't do any stupid things when I select zero units for my thermal view.
Below the non commented code. I'm sorry, but I think its simple enough for everybody who landing here.
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.preference.Preference;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import georg.com.flironetest_01.Variables.Units;
/**
* Created by Georg on 16/03/16.
*/
public class UnitMultipleSelectorPreference extends Preference implements DialogInterface.OnClickListener, Preference.OnPreferenceClickListener {
String[] human_entries = null;
String[] machine_entries = null;
public SharedPreferences prev;
public UnitMultipleSelectorPreference(Context context, AttributeSet attrs) {
super(context, attrs);
prev = getSharedPreferences();
List<String> humanU = new ArrayList<>();
List<String> machineU = new ArrayList<>();
Units[] all = Units.values();
for (Units elem : all) {
humanU.add(elem.toString());
machineU.add(elem.name());
}
human_entries = humanU.toArray(new String[humanU.size()]);
machine_entries = machineU.toArray(new String[machineU.size()]);
Set<String> mU = new HashSet<>();
mU.add(Units.C.name());
mU.add(Units.K.name());
setDefaultValue(mU);
setOnPreferenceClickListener(this);
}
boolean[] selected = new boolean[0];
protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
if (prev == null)
return;
if (human_entries == null || machine_entries == null || human_entries.length != machine_entries.length ) {
throw new IllegalStateException(
"ListPreference requires an entries array and an entryValues array which are both the same length");
}
selected = new boolean[human_entries.length];
for (int i = 0; i < human_entries.length; i++)
selected[i] = prefSet.contains(machine_entries[i]);
String[] stringObj = new String[human_entries.length];
int i = 0;
for(CharSequence ch : human_entries)
stringObj[i++] = ch.toString();
builder.setAdapter(new MyAdapter(getContext(), android.R.layout.simple_list_item_multiple_choice, stringObj), new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
}
});
AlertDialog mDialog = builder.create();
mDialog.getListView().setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE);
mDialog.getListView().setItemsCanFocus(false);
mDialog.getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// Manage selected items here
ListView mParent = (ListView)parent;
if (mParent.getCheckedItemCount() >= 1)
selected[position] = mParent.isItemChecked(position);
if (mParent.getCheckedItemCount() == 0)
mParent.setItemChecked(position, true);
}
});
mDialog.show();
i = 0;
for (boolean select : selected)
mDialog.getListView().setItemChecked(i++, select);
}
#Override
public boolean onPreferenceClick(Preference preference) {
AlertDialog.Builder mBuilder = new AlertDialog.Builder(getContext());
mBuilder.setTitle(getTitle())
.setPositiveButton(android.R.string.ok, this)
.setNegativeButton(android.R.string.cancel, this);
onPrepareDialogBuilder(mBuilder);
return true;
}
#Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(getContext(), "W:"+which + " | " + Arrays.toString(selected), Toast.LENGTH_SHORT).show();
switch (which) {
case -1:
if (isPersistent()) {
prefSet = new HashSet<>();
for (int i = 0; i < selected.length; i++) {
if (selected[i])
prefSet.add(machine_entries[i]);
}
getEditor().putStringSet(getKey(), prefSet).apply();
Toast.makeText(getContext(), "W:"+which + " | " + getSharedPreferences().getStringSet(getKey(),null).toString(), Toast.LENGTH_SHORT).show();
}
return;
}
}
public class MyAdapter extends ArrayAdapter<String> {
public MyAdapter(Context context, int textViewResourceId, String[] objects) {
super(context, textViewResourceId, objects);
}
#Override
public boolean isEnabled(int n) {
return true;
}
}
Set<String> prefSet;
#Override
protected void onSetInitialValue(boolean restorePersistedValue, Object defaultValue) {
super.onSetInitialValue(restorePersistedValue, defaultValue);
prev = getSharedPreferences();
if(restorePersistedValue) {
prefSet = prev.getStringSet(getKey(), new HashSet<String>());
} else {
try {
prefSet = (Set<String>)defaultValue;
if(isPersistent())
getEditor().putStringSet(getKey(), prefSet);
} catch (ClassCastException e) {
Log.e("ERROR_CAST", "Error casting the default value to Set<String>.");
}
}
}
}

A really simple solution is to set a setOnPreferenceChangeListener and just return false if the new value would be empty.
All of the code is put into onCreatePreferences.
MultiSelectListPreference infoPreference = findPreference("information");
infoPreference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
#Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (size(newValue) == 0){
return false;
}
return true;
}
});

Android - cannot scroll up

First off, I first laid eyes on Java three weeks ago so bear with me if this code is terrible. It's an assignment for school that I am to build on a prototyped app and give it a UI, so the Adapter is basically all I've done to this.
My problem being that as soon as I touch the scroll, I get thrown to the bottom of the list and can't scroll back up without getting pushed back down.
/**
* VaxjoWeather.java
* Created: May 9, 2010
* Jonas Lundberg, LnU
*/
package dv106.weather;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
/**
* This is a first prototype for a weather app. It is currently
* only downloading weather data for Växjo.
*
* This activity downloads weather data and constructs a WeatherReport,
* a data structure containing weather data for a number of periods ahead.
*
* The WeatherHandler is a SAX parser for the weather reports
* (forecast.xml) produced by www.yr.no. The handler constructs
* a WeatherReport containing meta data for a given location
* (e.g. city, country, last updated, next update) and a sequence
* of WeatherForecasts.
* Each WeatherForecast represents a forecast (weather, rain, wind, etc)
* for a given time period.
*
* The next task is to construct a list based GUI where each row
* displays the weather data for a single period.
*
*
* #author jlnmsi
*
*/
public class VaxjoWeather extends ListActivity {
//private InputStream input;
private WeatherReport report = null;
//private ArrayList<WeatherForecast> forecastList = new ArrayList<WeatherForecast>();
private WeatherAdapter adapter;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
adapter = new WeatherAdapter(this);
setListAdapter(adapter);
//getListView().setTranscriptMode(ListView.TRANSCRIPT_MODE_DISABLED);
try {
URL url = new URL("http://www.yr.no/sted/Sverige/Kronoberg/V%E4xj%F6/forecast.xml");
AsyncTask task = new WeatherRetriever().execute(url);
} catch (IOException ioe ) {
ioe.printStackTrace();
}
//adapter.notifyDataSetChanged();
}
private void PrintReportToConsole() {
if (this.report != null) {
/* Print location meta data */
//System.out.println(report);
/* Print forecasts */
int count = 0;
for (WeatherForecast forecast : report) {
count++;
adapter.add(forecast);
}
}
else {
System.out.println("Weather report has not been loaded.");
}
//adapter.notifyDataSetChanged();
}
private class WeatherRetriever extends AsyncTask<URL, Void, WeatherReport> {
protected WeatherReport doInBackground(URL... urls) {
try {
return WeatherHandler.getWeatherReport(urls[0]);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
protected void onProgressUpdate(Void... progress) {
}
protected void onPostExecute(WeatherReport result) {
report = result;
PrintReportToConsole();
}
}
// custom ArrayAdpater to show, weather icon, temperature, and precipation.
class WeatherAdapter extends ArrayAdapter<WeatherForecast> {
public WeatherAdapter(Context context) {
super(context,R.layout.forecast);
}
#Override // Called when updating the ListView
public View getView(int position, View convertView, ViewGroup parent) {
View row;
if (convertView == null) { // Create new row view object
LayoutInflater inflater = getLayoutInflater();
row = inflater.inflate(R.layout.forecast,parent,false);
}
else // reuse old row view to save time/battery
row = convertView;
// TextView for Temperature
TextView temperature = (TextView)row.findViewById(R.id.temperature);
temperature.setText(Integer.toString(this.getItem(position).getTemp())+" °C");
// TextView for out Precipation.
TextView precipation = (TextView)row.findViewById(R.id.rain);
precipation.setText(String.valueOf(this.getItem(position).getRain())+" mm");
// Image Icon for forecast.
ImageView icon = (ImageView)row.findViewById(R.id.icon);
String iconPath = "ic_";
if (this.getItem(position).getWeatherCode() <= 9){
iconPath = iconPath+"0"+(Integer.toString(this.getItem(position).getWeatherCode()));
}
else {
iconPath = iconPath+(Integer.toString(this.getItem(position).getWeatherCode()));
}
int resId = getResources().getIdentifier(iconPath, "drawable", getPackageName());
// If the resource ID is invalid, as in the image not existing, we'll add the postfix for periods.
if (resId == 0){
// Set the icon image source dependent on period code given.
if(this.getItem(position).getPeriodCode() == 3){
iconPath = iconPath +"n";
}
else if (this.getItem(position).getPeriodCode() == 2){
iconPath = iconPath +"d";
}
else {
iconPath = iconPath +"m";
}
resId = getResources().getIdentifier(iconPath, "drawable", getPackageName());
icon.setImageResource(resId);
}
// Or if everything checked out, we'll just run with the resource ID and find our Icon.
else {
icon.setImageResource(resId);
}
return row;
}
}
}
I tried applying another standard arrayadapter and actually got the same unwanted scrolling results, so I got no idea what part it is I got issues with.

Way to do it is:
1: Place ListView in main.xml
2: In your Activity Make object of ListView like so -> private ListView listView; in onCreate connect it to the main.xml like this, listView = (ListView) R.id.listView1; // whatever it is called
3: next create an ArrayList:-> private ArrayList arrayWeather = new ArrayList();
4: fill the arraylist with weather data then finally create object of class you created and make it use your arraylist to display data.
Example:
public class ListUser extends BaseAdapter{
#Override
public int getCount() {
// TODO Auto-generated method stub
return arraylistData.size(); // the arraylist u created
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return arraylistData.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return arraylistData.size();
}
#Override
public View getView(final int position, View v, ViewGroup parent) {
if(v == null){
LayoutInflater lf = (LayoutInflater) BuyPets.this.getSystemService( Context.LAYOUT_INFLATER_SERVICE);
v = lf.inflate(R.layout.forecast, null);
}
// setup here, done
return v;
}
}

Solution was found and apparently it had nothing to do with my code. Class suggested we'd use Intel x86 instead of ARM for our emulators. Running it with ARM scrolling work just as expected.

How to effectively store checkbox values in Custom BaseAdapter

For the past two weeks, I have been struggling to produce a solution to store my checkbox values next to each of my listview items when I exit and open the app. Essentially, I have a custom BaseAdapter class which populates the listview with installed applications on the users phone and a checkbox next to each installed app. When I scroll down the checkbox states stay;however, when I click back or exit and come back it doesn't stay.
I used SharedPreferences in almost every way possible. My last way was using a for loop to create a SharedPreference for each one and restore the boolean in the for loop as well and to store a boolean true and false (for checked and unchecked respectively) in if and else statements.
Here is my code for my BaseAdapter class using SharedPreferences:
package com.ibc.android.demo.appslist.app;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
import com.spicycurryman.getdisciplined10.app.R;
import java.util.List;
//
public class ApkAdapter extends BaseAdapter {
//Pastebin link: http://pastebin.com/LGRicg4U , http://pastebin.com/c4WfmhMK , http://pastebin.com/gFuuM4dY, http://pastebin.com/4Q7EP9G4
// http://pastebin.com/Te2g072w, http://pastebin.com/NLT5iUiA ,
SharedPreferences sharedPrefs;
List<PackageInfo> packageList;
Activity context;
PackageManager packageManager;
boolean[] itemChecked;
String PACKAGE_NAME;
public ApkAdapter(Activity context, List<PackageInfo> packageList,
PackageManager packageManager) {
super();
this.context = context;
this.packageList = packageList;
this.packageManager = packageManager;
itemChecked = new boolean[packageList.size()];
}
private class ViewHolder {
TextView apkName;
CheckBox ck1;
TextView packageName;
}
public int getCount() {
return packageList.size();
}
public Object getItem(int position) {
return packageList.get(position);
}
public long getItemId(int position) {
return 0;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
LayoutInflater inflater = context.getLayoutInflater();
if (convertView == null) {
convertView = inflater.inflate(R.layout.installed_apps, null);
holder = new ViewHolder();
holder.apkName = (TextView) convertView
.findViewById(R.id.appname);
holder.ck1= (CheckBox)convertView
.findViewById(R.id.checkBox1);
convertView.setTag(holder);
//holder.ck1.setTag(packageList.get(position));
} else {
holder = (ViewHolder) convertView.getTag();
}
// ViewHolder holder = (ViewHolder) convertView.getTag();
PackageInfo packageInfo = (PackageInfo) getItem(position);
Drawable appIcon = packageManager
.getApplicationIcon(packageInfo.applicationInfo);
// Make sure to define it again!
PACKAGE_NAME = packageInfo.packageName;
final String appName = packageManager.getApplicationLabel(
packageInfo.applicationInfo).toString();
appIcon.setBounds(0, 0, 80, 80);
holder.apkName.setCompoundDrawables(appIcon, null, null, null);
holder.apkName.setCompoundDrawablePadding(15);
holder.apkName.setText(appName);
holder.ck1.setChecked(false);
if (itemChecked[position])
holder.ck1.setChecked(true);
else
holder.ck1.setChecked(false);
Log.d("just loaded??", PACKAGE_NAME);
Log.d("just loaded 2?", appName+position);
// CHANGE UP EVERYTHING! MAKE THIS SHIT WORK, TIGGA!
for(int i= 0; i<packageList.size(); i++){
sharedPrefs = context.getSharedPreferences(String.valueOf(i), Context.MODE_PRIVATE);
holder.ck1.setChecked(sharedPrefs.getBoolean(String.valueOf(i),false));
}
holder.ck1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
SharedPreferences.Editor editor = context.getSharedPreferences(String.valueOf(position), Context.MODE_PRIVATE).edit();
if (holder.ck1.isChecked()) {
itemChecked[position] = true;
holder.ck1.setChecked(true);
Log.i("This is", " checked: " + position);
editor.putBoolean(String.valueOf(position), true);
Log.d("put true", appName+position);
editor.apply();
} else {
itemChecked[position] = false;
holder.ck1.setChecked(false);
Log.i("This is", " not checked: " + position);
editor.putBoolean(String.valueOf(position), false);
Log.d("put false", appName+position);
editor.apply();
}
}
});
return convertView;
}
}
I have also created a DatabaseHandler class and Object class for using SQLite database to store my checkbox values instead after unsuccessfully storing it with SharedPreferences.
Here are the pastebin links so I don't clog the post:
DatabaseHandler class: http://pastebin.com/NzKhBiZ3
Object class: http://pastebin.com/Jp3BLXba
I know that there are many posts, blogs, and links on using custom adapters/listviews and saving checkboxes and button states etc using SQLite and SharedPreferences, but I assure you I have done my fair share of research for weeks, but I haven't been able to find something that works for my specific case.
Some examples:
Saving State of the checkbox in a custom list view with Checkboxes
http://blog.csdn.net/qu213/article/details/9289349
What would be the most optimal option in my particular case and How would I produce a solution in my situation to successfully save the checkbox states next to each installed app listview item that would be saved after I exit the application and re-enter? Some code would really be of help.
Thank you for your time.
Let me know if you need me to include any xml files.

I think I may have solved your problem. Please try thise code and see if it works.
for(int i= 0; i<packageList.size(); i++){
PACKAGE_NAME = packageInfo.packageName;
sharedPrefs = context.getSharedPreferences(PACKAGE_NAME, Context.MODE_PRIVATE);
Log.d("just got sharedpref??", PACKAGE_NAME);
holder.ck1.setChecked(sharedPrefs.getBoolean(PACKAGE_NAME,false));
Log.d("just got boolean??", PACKAGE_NAME);
}
holder.ck1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
SharedPreferences.Editor editor = context.getSharedPreferences(packageInfo.packageName, Context.MODE_PRIVATE).edit();
if (holder.ck1.isChecked()) {
itemChecked[position] = true;
holder.ck1.setChecked(true);
Log.i("This is", " checked: " + position);
editor.putBoolean(packageInfo.packageName, true);
Log.d("put true", packageInfo.packageName);
editor.apply();
} else {
itemChecked[position] = false;
holder.ck1.setChecked(false);
Log.i("This is", " not checked: " + position);
editor.putBoolean(packageInfo.packageName, false);
Log.d("put false", packageInfo.packageName);
editor.apply();
}
}
});
I passed in the packagenames for the keys. :)

what i would suggest in your case is to define an object that would deal with storing and retrieving state data. Lets say you have an AppHandler class as your main object and AppState class
for keeping state related data such as your checkboxes.
public class AppHandler {
private List<AppState> lastInstalledApp;
#transient
private Gson gson;
public void retrieve(SharedPreferences pref){
// parse the gson from shared preferences
// create the lastInstalledApp list
String jsonState = pref.getString("APP_STATE", null);
if(jsonState != null)
lastInstalledApp = gson.fromJson(jsonState, lastInstalledApp.getClass());
}
public void store(SharedPreferences pref){
// store the data to shared preferences
}
public List<AppState> getAppList(){
return lastInstalledApp;
}
public static class AppState{
protected boolean lastCheckbox;
protected String name;
public boolean isLastCheckbox() {
return lastCheckbox;
}
public void setLastCheckbox(boolean lastCheckbox) {
this.lastCheckbox = lastCheckbox;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Use shared preferences to store the entire AppHandler object as a JSON string (use GSON for this) so you access the storage file only once and not every time you want to access a single checkbox state. You can retrieve and store this data on your activity (the adapter initiate it with your appHandler.getAppList() data):
#Override
protected void onCreate(Bundle arg0) {
super.onCreate(arg0);
setContentView(R.layout.list_layout);
appHandler = new AppHandler();
appHandler.retrieve(getSharedPreferences());
}
#Override
protected void onDestroy() {
appHandler.store(getSharedPreferences());
super.onDestroy();
}
within the your custom adapter access the specific application by their package names in order to get the state of checkbox. you may even extend ArrayList and add some methods like getAppByName() so you can keep a clear distinction between objects.
when changing the checkbox state update the equivalent boolean value of the AppState object. This is in general terms.

Use sqlite database ...Everytime the user checks/unchecks the value make an entry in the database.
App1 checked
App2 checked
App3 checked
App4 unchecked

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

Problem with ArrayList - java

Yes it definitly have to exists (EmployeeAction class). For what it should contains, I'd say probably a constructor that take parameters like these : (String location, String phone, EmployeeAction.ACTION*) and then setters and getters for these values.

EmplyeeAction is a not Java known class. Then, it could be imported (if it exists) or created.

The list is irrelevant here. A few lines down, your code says: actions.add(new EmployeeAction("Call office", officePhone, EmployeeAction.ACTION_CALL)); Yes, you do need a class EmployeeAction to compile that code. It's probably introduced in a part of the tutorial you overlooked or skipped.

you have to have a EmployeeAction class. since you say that you are new to java it will be good if go through this tutorial

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