Reputation: 3991
I want to save the value of a string at exit of my application(process kill) in last activity , so that when I start that application again I can retrieve that value in first activity.
I tried the sharedpreferences
but that does not solve my problem. Here is the code snippet.
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
Intent int1 = getIntent();
String pth = prefs.getString("pathreturned", "true");
to retrieve in the first activity.
and this one to save it in the previous activity:
SharedPreferences myPrefs = getSharedPreferences("myPrefs", MODE_PRIVATE);
SharedPreferences.Editor e = myPrefs.edit();
e.putString("pathreturned", path);
e.commit();
Upvotes: 1
Views: 2677
Reputation: 2229
Here is a complete Example of Saving Strings Via SharedPreferences
import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class SharedPrefs extends Activity implements OnClickListener{
private EditText dataInput;
private TextView dataView;
private SharedPreferences sharedString;
public static final String myFile = "MySharedDataFile";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sharedprefs);
setUpVariables();
sharedString = getSharedPreferences(myFile, 0);
}
public void setUpVariables(){
dataInput = (EditText) findViewById(R.id.dataToUse);
dataView = (TextView) findViewById(R.id.showDataView);
Button save = (Button) findViewById(R.id.savedataButton);
Button load = (Button) findViewById(R.id.loadDataButton);
save.setOnClickListener(this);
load.setOnClickListener(this);
}
public void onClick(View arg0) {
switch(arg0.getId()){
case R.id.savedataButton:
String dataToSave = dataInput.getText().toString();
Editor storeData = sharedString.edit();
storeData.putString("key", dataToSave);
storeData.commit();
break;
case R.id.loadDataButton:
sharedString = getSharedPreferences(myFile, 0);
String savedData = sharedString.getString("key", "No data Found");
dataView.setText(savedData);
break;
}
}
}
Upvotes: 2
Reputation: 28439
Unless you know which Activity is going to be "last" you should save your value at the close of each activity. Override the onStop method and save it there.
Upvotes: 1
Reputation: 33575
In your previous Activity, use the same code as the one you used before...
Instead of
SharedPreferences myPrefs = getSharedPreferences("myPrefs", MODE_PRIVATE);
use
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
Upvotes: 3