Android CheckBox in Listview - android

I have a listview populated from the database, and a checkbox for each row. Using putExtras to pass values ​​to a TextView to another Activity. Now when you restart the app I want to display in TextView the last value selected with checkboxes. I need SharedPreferences or is there a method? Thanks


Save your checkbox in preference as below:
//method to load the sharedpreferences.
private void loadSavedPreferences() {
SharedPreferences sharedPreferences = PreferenceManager
.getDefaultSharedPreferences(this);
boolean checkBoxValue = sharedPreferences.getBoolean("CheckBox_Value", false);
String name = sharedPreferences.getString("storedName", "YourName");
if (checkBoxValue) {
checkBox.setChecked(true);
} else {
checkBox.setChecked(false);
}
textview.setText(name);
}
//store boolean value of checkbox in sharedpreferences.
private void savePreferences(String key, boolean value) {
SharedPreferences sharedPreferences = PreferenceManager
.getDefaultSharedPreferences(this);
Editor editor = sharedPreferences.edit();
editor.putBoolean(key, value);
editor.commit();
}
//store the string sharedpreference.
private void savePreferences(String key, String value) {
SharedPreferences sharedPreferences = PreferenceManager
.getDefaultSharedPreferences(this);
Editor editor = sharedPreferences.edit();
editor.putString(key, value);
editor.commit();
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
savePreferences("CheckBox_Value", checkBox.isChecked());
savePreferences("storedName", textview.getText().toString());
}

Related

SharedPreferences should remember the content of the TextView when it returns to MainActivity

I have a situation where there is a TextView in MainActivity with some textual content. However, when I go from MainActivity to SecondActivity and return to MainActivity again, the text contained in TextView is lost. I tried to solve this with the help of SharedPreferences and I wrote the code. SharedPreferences does not save when I return from SecondActivity. I really do not see where I am making a problem in this code and I ask your help.
private void SavePreferences(String key, String value){
SharedPreferences sharedPreferences = getPreferences(MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(key, value);
editor.apply();
}
private void LoadPreferences()
{
SharedPreferences sharedPreferences = getPreferences(MODE_PRIVATE);
String textstorage = sharedPreferences.getString("TEXT", "");
mytext.setText(textstorage);
}

You should call LoadPreferences() in onResume() because onCreate() won't be called when you return back from Second Activity
#Override
protected void onResume() {
super.onResume();
LoadPreferences();
}

you need to give name to your preference try below code:SharedPreferences.Editor editor = getSharedPreferences(PREF_NAME, PRIVATE_MODE).edit()
editor.putString(key, value);
editor.apply();
editor.commit(); // you can omit this, i use this one
and to get it back SharedPreferences sharedPreferences = getSharedPreferences(PREF_NAME, PRIVATE_MODE);
String textstorage = sharedPreferences.getString(key, "default value"); // default value will be alternate value if you string is not found
mytext.setText(textstorage);

Is it possible to save void in SharedPreferences

I have a button which changes the color of the MainActivity but this works only if the app it is open if I exit the app and open again it return to normal color which is white.
How to store with Shared Preferences do you have any idea how to do that because strings, int and boolean I can save but this function I don' have any idea.
This is my code.
MainActivity.class
public static final String Change_Color = "Change_Color";
private boolean switchOnOff;
setContentView(R.layout.activity_main);
if (switchOnOff == true) {
setColorGreyImageButton();
} else if(switchOnOff == false) {
setColorWhiteImageButton();
}
if(id == R.id.menu_back_white) {
saveColor();
} else if (id == R.id.menu_back_black) {
saveColor2();
}
public void setColorGreyImageButton() {
settings.setColorFilter(Color.parseColor("#757575"));
voiceSearch.setColorFilter(Color.parseColor("#757575"));
share.setColorFilter(Color.parseColor("#757575"));
search.setColorFilter(Color.parseColor("#757575"));
mainView.setBackgroundColor(Color.parseColor("#FFFFFF"));
SharedPreferences in MainActivity
public void saveColor() {
SharedPreferences sharedPreferences = getSharedPreferences("Color", MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putBoolean(Change_Color, false);
switchOnOff = sharedPreferences.getBoolean(Change_Color, false);
}
public void saveColor2() {
SharedPreferences sharedPreferences = getSharedPreferences("Color", MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putBoolean(Change_Color, true);
switchOnOff = sharedPreferences.getBoolean(Change_Color, true);
}

Use these methods in your activity class:
private boolean getChangeColor() {
SharedPreferences sharedPreferences = getSharedPreferences("Color", MODE_PRIVATE);
return sharedPreferences.getBoolean(getPackageName() + ".change_color", false);
}
private void saveChangeColor(boolean changeColor) {
SharedPreferences sharedPreferences = getSharedPreferences("Color", MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putBoolean(getPackageName() + ".change_color", changeColor);
editor.apply();
}
In onCreate() check the boolean value stored in SharedPreferences:
switchOnOff = getChangeColor();
if (switchOnOff) {
setColorGreyImageButton();
} else {
setColorWhiteImageButton();
}
and when you want to change the value in SharedPreferences call:
saveChangeColor(true);
or
saveChangeColor(false);

Storing values in SharedPreferences on button click

How can I store already existing string value in SharedPreferences on button click? I have a TextView and a button: the TextView contains certain string and I want to store that in SharedPreferences on button click.

To write it:
button.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
SharedPreferences sharedPref = getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString("Yourkey", textView.getText()+"");
editor.commit();
}
});
And to read it:
SharedPreferences sharedPref = getPreferences(Context.MODE_PRIVATE);
String string = sharedPref.getString("Yourkey","default");

Here are methods which I use everytime to store data in shared-preferences:
private SharedPreferences app_prefs;
private final String DEVICE_TOKEN = "device_token";
public PreferenceHelper(Context context) {
app_prefs = context.getSharedPreferences(AndyConstants.PREF_NAME,
Context.MODE_PRIVATE);
this.context = context;
}
public void putDeviceToken(String deviceToken) {
Editor edit = app_prefs.edit();
edit.putString(DEVICE_TOKEN, deviceToken);
edit.commit();
}
public String getDeviceToken() {
return app_prefs.getString(DEVICE_TOKEN, null);
}
In the first method I create the shared-preferances object, in the second method I use it to put data and in third method to get data any where you need.

SharedPrefereces Not able to save Values

Iam not able to store values in shared prefernces.As soon as the activity is closed the no value remains saved. On starting the activity again the ids used to store and fetch data have null values.
Heres is my code.i am not attaching the layout as they will be of no significance.
As I am new to android.There might be some simple thing i a missing.Please help
public class enter_db extends AppCompatActivity
{
String field;
EditText usrtext,idtxt,bananatxt,coconuttxt,timbertxt,bambootxt,goldtxt,garage1txt,garage2txt,garage3txt,garage4txt,garage5txt;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.db_entry);
usrtext=(EditText)findViewById(R.id.username);
idtxt=(EditText)findViewById(R.id.UserID);
bananatxt=(EditText)findViewById(R.id.banana_count);
coconuttxt=(EditText)findViewById(R.id.coconut_count);
bambootxt=(EditText)findViewById(R.id.banana_count);
timbertxt=(EditText)findViewById(R.id.Timber_count);
goldtxt=(EditText)findViewById(R.id.gold_count);
garage1txt=(EditText)findViewById(R.id.garage_1);
garage2txt=(EditText)findViewById(R.id.garage_2);
garage3txt=(EditText)findViewById(R.id.garage_3);
garage4txt=(EditText)findViewById(R.id.garage_4);
garage5txt=(EditText)findViewById(R.id.garage_5);
SharedPreferences pref=getApplicationContext().getSharedPreferences("MyPref", MODE_PRIVATE);
final SharedPreferences.Editor editor = pref.edit();
if(pref.getString("Username",null)!="")
{
field=pref.getString("Username",null);
usrtext.setHint("Username"+field);
}
if(pref.getString("UserID",null)!=null)
{
field=pref.getString("UserID",null);
idtxt.setHint("UserID: "+field);
}
if(pref.getString("Banana",null)!=null)
{
field=pref.getString("Banana",null);
bananatxt.setHint("Banana: "+field);
}
if(pref.getString("Coconut",null)!=null)
{
field=pref.getString("Coconut",null);
coconuttxt.setHint("Cococnut: "+field);
}
if(pref.getString("Timber",null)!=null)
{
field=pref.getString("Timber",null);
timbertxt.setHint("Timber: "+field);
}
if(pref.getString("Bamboo",null)!=null)
{
field=pref.getString("Bamboo",null);
bambootxt.setHint("Bamboo"+field);
}
if(pref.getString("Gold",null)!=null)
{
field=pref.getString("Gold",null);
goldtxt.setHint("Gold: "+field);
}
if(pref.getString("Garage1",null)!=null)
{
field=pref.getString("Garage1",null);
garage1txt.setHint("Garage1 :"+field);
}
if(pref.getString("Garage2",null)!=null)
{
field=pref.getString("Garage2",null);
garage2txt.setHint("Garage2 :"+field);
}
if(pref.getString("Garage3",null)!=null)
{
field=pref.getString("Garage3",null);
garage3txt.setHint("Garage3 :"+field);
}
if(pref.getString("Garage4",null)!=null)
{
field=pref.getString("Garage4",null);
garage4txt.setHint("Garage4 :"+field);
}
if(pref.getString("Garage5",null)!=null)
{
field=pref.getString("Garage5",null);
garage5txt.setHint("Garage5 :"+field);
}
editor.putString("Username",usrtext.getText().toString());
editor.putString("UserID",idtxt.getText().toString());
editor.putString("Banana",bananatxt.getText().toString());
editor.putString("Coconut",coconuttxt.getText().toString());
editor.putString("Timber",timbertxt.getText().toString());
editor.putString("Bamboo",bambootxt.getText().toString());
editor.putString("Gold",goldtxt.getText().toString());
editor.putString("Garage1",garage1txt.getText().toString());
editor.putString("Garage2",garage2txt.getText().toString());
editor.putString("Garage3",garage3txt.getText().toString());
editor.putString("Garage4",garage4txt.getText().toString());
editor.putString("Garage5",garage5txt.getText().toString());
ImageButton ok=(ImageButton)findViewById(R.id.ok);
ok.setOnClickListener(new View.OnClickListener() {
// Start new list activity
public void onClick(View v)
{
editor.apply();
Intent i=new Intent(getApplicationContext(),Garage.class);
startActivity(i);
}
});
}
}

U missed the apply() / commit() to save chanegs.
SharedPreferences.Editor editor = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE).edit();
editor.putString("name", "Elena");
editor.putInt("idName", 12);
editor.apply(); // editor.commit()
apply() is faster and async while commit() is synchronous.

Save value in shared preferences:
SharedPreferences settings =getSharedPreferences("AppName", 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString(key, value);
editor. putBoolean(key, value);
editor.commit();
get value from shared preferences:
SharedPreferences settings = getSharedPreferences("AppName", 0);
String value=settings.getString(key, "");
boolean value=settings.getBoolean(key,false);

As in above code you are not saving value of edit text in shared preference on button click,try this way
ok.setOnClickListener(new View.OnClickListener() {
 // Start new list activity
 public void onClick(View v)
 {
 editor.putString("Username",usrtext.getText().toString());
 editor.putString("UserID",idtxt.getText().toString());
 editor.putString("Banana",bananatxt.getText().toString());
 editor.putString("Coconut",coconuttxt.getText().toString());
 editor.putString("Timber",timbertxt.getText().toString());
 editor.putString("Bamboo",bambootxt.getText().toString());
 editor.putString("Gold",goldtxt.getText().toString());
 editor.putString("Garage1",garage1txt.getText().toString());
 editor.putString("Garage2",garage2txt.getText().toString());
 editor.putString("Garage3",garage3txt.getText().toString());
 editor.putString("Garage4",garage4txt.getText().toString());
 editor.putString("Garage5",garage5txt.getText().toString());

 editor.apply();
 Intent i=new Intent(getApplicationContext(),Garage.class);
 startActivity(i);
 }
});

editor.putString("Garage5",garage5txt.getText().toString());
editor.commit();

Shared preferences not working correctly

I'm trying to store some strings in a shared preference file and then retrieve them in another activity, except it doesn't seem to be working. Any guidance as to where im going wrong would be much appreciated. Many thanks.
public void save(View view) {
SavePreferences("name", nameS);
SavePreferences("current", currentS);
SavePreferences("goal", goalS);
SavePreferences("CurrentBmi", cBmiS);
SavePreferences("goalBmi", gBmiS);
Toast.makeText(this, "profile Saved", Toast.LENGTH_SHORT).show();
startActivity(new Intent(this, MainActivity.class));
}
private void SavePreferences(String key, String value) {
SharedPreferences sharedPreferences = getPreferences(MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(key, value);
editor.commit();
}
public class Progress extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_progress);
SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE);
String test = sharedPreferences.getString("name", "");
String test2 = sharedPreferences.getString("current", "");
TextView testy = (TextView) findViewById(R.id.textView1);
testy.setText(test);
TextView testz = (TextView) findViewById(R.id.test2);
testz.setText(test2);
}

With the code you have you are limiting the access of sharedpreferences to activity(context) level.
Values saved in activity Activity MainActivity will not be available in activity Progress since you are using getPreferences(MODE_PRIVATE);
Change this to
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
or
SharedPreferences preferences = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE);
getPreferences:
public SharedPreferences getPreferences (int mode)
Retrieve a SharedPreferences object for accessing preferences that are private to this activity.

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