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How can I persist the string/int value in EditText when i relaunch my application?

In my Android activity, I have one EditText, a '+' button, a '-' button, 'Save' button and 'Load' button. When I press '+', the value in EditText increases by 1, similarly on pressing '-' value decreases by 1. I used SharedPreferences to save the data when I click on 'Save'. When I click 'Load', I want to reload this data onto the EditText field.
Now the problem is, when I completely exit the application (even from recently used apps), and click 'Load' on relaunching it, the saved number doesn't appear. I included the onClick() action for the 'Load' method in onRestart() method. It still doesn't work. What am I missing here? I even tried out all other suggestions for the similar questions asked previously here.
Also, is it really onRestart() or onRestoreInstanceState() ?
public class MainActivity extends Activity {
Button btn1;
Button btn2;
Button btn3;
Button btn4;
EditText scoreText;
int counter = 0;
TextView textTitle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1 = (Button)findViewById(R.id.add);
btn2 = (Button)findViewById(R.id.subtract);
btn3 = (Button)findViewById(R.id.save);
btn4 = (Button)findViewById(R.id.load);
scoreText = (EditText)findViewById(R.id.total);
textTitle = (TextView)findViewById(R.id.title);
btn1.setOnClickListener(new View.OnClickListener() {
// The code in this method will be executed when the numbers View is clicked on.
#Override
public void onClick(View v) {
counter++;
scoreText.setText(Integer.toString(counter));
scoreText.setBackgroundColor(Color.GREEN);
}
});
btn2.setOnClickListener(new View.OnClickListener() {
// The code in this method will be executed when the numbers View is clicked on.
#Override
public void onClick(View v) {
counter=counter-1;
scoreText.setText(Integer.toString(counter));
scoreText.setBackgroundColor(Color.RED);
}
});
btn3.setOnClickListener(new View.OnClickListener() {
// The code in this method will be executed when the numbers View is clicked on.
#Override
public void onClick(View v) {
//store data using sharedprefernces
SharedPreferences sharedPreferences=getSharedPreferences("Data", Context.MODE_PRIVATE);
SharedPreferences.Editor editor=sharedPreferences.edit();
//Edit method allow to write the data in sharedpreferences
editor.putString("count",scoreText.getText().toString());
//For commit changes commit() method is used
editor.commit();
Toast.makeText(getApplicationContext(),"Data Saved",Toast.LENGTH_SHORT).show();
}
});
btn4.setOnClickListener(new View.OnClickListener() {
// The code in this method will be executed when the numbers View is clicked on.
#Override
public void onClick(View v) {
SharedPreferences sharedPreferences=getSharedPreferences("Data", Context.MODE_PRIVATE);
String strcount=sharedPreferences.getString("name",scoreText.getText().toString());
// scoreText.setText(strcount);
scoreText.setBackgroundColor(Color.YELLOW);
}
});
}
#Override
protected void onRestart(Bundle savedInstanceState){
super.onRestart(savedInstanceState);
btn4.setOnClickListener(new View.OnClickListener() {
// The code in this method will be executed when the numbers View is clicked on.
#Override
public void onClick(View v) {
SharedPreferences sharedPreferences=getSharedPreferences("Data", Context.MODE_PRIVATE);
String strcount=sharedPreferences.getString("name",scoreText.getText().toString());
if (strcount.equals(""))
{
Toast.makeText(getApplicationContext(), "Data Was Not Found", Toast.LENGTH_SHORT).show();
}
else
{
scoreText.setText(strcount);
}
scoreText.setBackgroundColor(Color.YELLOW);
}
});
}

You using using count as key to save the value
editor.putString("count",scoreText.getText().toString());
but using name as key to retrieve the value so you need to use count key while getting the previously stored data so use
sharedPreferences.getString("count",scoreText.getText().toString());
instead of
sharedPreferences.getString("name",scoreText.getText().toString());

You are using different keys to save and retrieve the data from SharedPrefernces.
editor.putString("count",scoreText.getText().toString());
String strcount=sharedPreferences.getString("name",scoreText.getText().toString());
You should be using the same key in both the cases otherwise it would return default value which is the text in TextView and that would be empty at the start of the app, you just need to change the key and that would do the trick for you.
Just change the below line like it is mentioned
String strcount=sharedPreferences.getString("count",scoreText.getText().toString());

How to publish a value when a button is clicked?

Currently, the value is in an editText, and when the button is clicked, the value is published to a server. But how do I get rid of that editText and store that value in the button, so I do not need the editText? This method publishes the value of 32 when the button is pressed from the editText.
private void publishValue() {
try {
final MqttTopic myTopic = mqttClient.getTopic(TOPIC_VALUE);
final int topicNumber = 32;
EditText theTopic = (EditText) findViewById(R.id.editTopicValue);
final String topic = theTopic.getText().toString();
myTopic.publish(new MqttMessage(topic.getBytes()));
System.out.println("Published data. Topic: " + myTopic.getTopic() + " Message: " + topic);
} catch (MqttException e) {
e.printStackTrace();
System.exit(1);
}
}
}

So if all you are trying to do is change the Button text to the EditText, then hide the EditText. The code for you is below.
So in the java code of your view, you probably want to have you UI controls as private variables. Then set an onClickListener for your button.
That "public void OnClick(view V)" is the void that will fire on when that button is clicked.
editText = findViewById(R.id.textEdit);
button = findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
topic = editText.getText().toString();
editText.setVisibility(View.GONE);
button.setText(topic);
}
});

How to clear the intent text?

I have a reset button in Activity A and it works fine since it can clear all the text and display null when the save button in Activity B is clicked. But this only works if there are nothing in the textView before pass to B.
It does not works in below cases.
In Activity A, type " Project 123', click next button go to B. Then I back to Activity A again and click the reset button to clear "Project 123". After done go to Activity B and click submit button. It shows "Project 123" instead of "null"...
Activity A
private TextView c;
String result; // 123
String name; // project
reset=(Button)claims.findViewById(R.id.button14); // reset button
Button button = (Button) claims.findViewById(R.id.button8); //next button
reset.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
c.setText("");
d.setText("");
e.setText("");
f.setText("");
g.setText("");
h.setText("");
}
});
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent(getActivity().getApplicationContext(), B.class);
if(c!=null){
intent.putExtra("name", name);
intent.putExtra("result", result);
}
});
return A;
}
Activity B
Name=getIntent().getExtras().getString("name");
Result=getIntent().getExtras().getString("result");
save=(Button)findViewById(R.id.button8);
save.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
if((Name!=null)&&(Result!=null)){
Toast.makeText(getApplicationContext(), Name+Result, Toast.LENGTH_LONG).show();
}else{
Toast.makeText(getApplicationContext(),"null", Toast.LENGTH_LONG).show();
}
}
});

This is because you only clear the setText but not the string.
reset.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
c.setText("");
name="";
result="";
}
});
You have to add name="" and result="" in your reset method. It should works.
Kindly refer clear a value from a string android

Actually, the name is not null but with empty string ""
Try to take replace the Name != null with !TextUtils.isEmpty() in B activity.

Event get String from 2 buttons

I am using an Adapter to generate buttons in a GridView.
Using an OnClickListener, whenever I click a button from the GridView, it is possible to get the String of the button in a variable. However, I want to click a button, store its text in a variable, then click a different button, store its text in another variable so later I can compare the two texts. How could I do that?
gI'm using OnClickListener, therefore my previous implementation for one button was the following:
public void onClick(View v) {
Button b = (Button)v;
String text = b.getText.toString();
With this approach, I can only get and store text from first button clicked, unless I store all the values in an array.

Ok so from what I can understand, you want to compare the strings of the two items in a grid view. If this is what you want, heres how I would do it(just a psuedocode):
String mValue1, mValue2;
boolean isOneClicked = false;
onItemClickedListener(item, position){
if(!isOneClicked){
mValue1 = item.stringValue;
isOneClicked = true;
}
else{
mValue2 = item.stringValue;
//do whatever you want here
//Reset when done
mValue1 = "";
mValue2 = "";
isOneClicked = false;
}
}

Please you can share your code to turn the things more comprehensible? Edit your question please... Anyways:
MainActivity.java
public class MainActivity extends Activity {
private Button button1;
private Button button2;
private String butString, butString2;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
button1 = (Button) findViewById(R.id.button1);
button2 = (Button) findViewById(R.id.button2);
button1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
butString = (String) button1.getText();
}
});
button2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
butString2 = (String) button1.getText();
}
});
}
}
After that you can compare the two strings.

Get data from TimePicker which is inside an Alert, which is inside a Fragment

I'm trying to set an OnTimeChangedListener to set the value of a TextView which is located in my Fragment (I've got an action bar with three tabs), i setted the OnTimeChangedListener in my MainActivity like this :
private OnTimeChangedListener OnTimeChangedListener = new OnTimeChangedListener() {
#Override
public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
time.setText(getSelectedTime(view));
}
};
Here is the method getSelectedTime();
public String getSelectedTime(TimePicker t) {
String time = t.getCurrentHour() + " : " + t.getCurrentMinute();
return time;
}
Like i said, the TimePicker is located in an Alert, the alert pops when a button is pressed in the same fragment than the TextView, here is the code :
public void showTimePicker(Button but) {
final Dialog dialog = new Dialog(this);
final TimePicker t;
dialog.setContentView(R.layout.alert_time);
dialog.setTitle("Heure");
Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK);
dialogButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
t = (TimePicker) findViewById(R.id.time_cri);
/* findViewById() return NULL here !! */
t.setOnTimeChangedListener(OnTimeChangedListener);
dialog.show();
}
I have got a nullPointerException at this point (findViewById() in the above method). I tried different ways to get this working, but i found nothing ! If someone knew a solution to this, this would make my day !!!
Thank you for reading this !