CODEWITHSUNDEEP
javaandroidandroid-activitysharedpreferences
Gaurav Takte
Gaurav Takte

Reputation: 615

Can we share or transfer data from one Activity to another Activity using SharedPreference?

I have to just transfer save file path from one activity to another activity but when it comes to show the data it display null value.

Following is the code to store data in SharedPreference:-

    SharedPreferences pref= getApplicationContext().getSharedPreferences("Recorder",0);
    SharedPreferences.Editor editor = pref.edit();
    editor.putString("file_name",DateFormat.format("yyyy-MM-dd_kk-mm-ss", new Date().getTime())+".mp4");
    editor.putString("file_path",Environment.getExternalStorageDirectory()+"/"+DateFormat.format("yyyy-MM-dd_kk-mm-ss", new Date().getTime())+".mp4");

Retrieving data from sharedPreference:-

 file_name = (TextView) findViewById(R.id.file_name);
    file_path = (TextView) findViewById(R.id.file_path);
    pref = getApplicationContext().getSharedPreferences("Recorder",0);
    editor = pref.edit();
    String fileName = pref.getString("file_name",null);
    String filePath = pref.getString("file_path",null);

    if(fileName != null){
            file_name.setText(fileName);
    }else{
        file_name.append("");
    }

    if (filePath != null){
        file_path.setText(filePath);
    }else{
        file_path.append("");
    }

Upvotes: 0

Views: 504

Answers (7)

Sunil P
Sunil P

Reputation: 3838

Yes you can make use of SharedPrefernces. try below code

     public static final String MYPREFERNCES_Example = "mysharedpref";
     SharedPreferences.Editor editor ;
     SharedPreferences sp;

    sp = getSharedPreferences(MYPREFERNCES_Example Context.MODE_PRIVATE);
    editor=sp.edit();

    Intent i_login = new Intent(LoginActivity.this, HomeActivity.class);
    editor.putString("yourownkey1", yourvalue);
    editor.putString("yourownkey2", yourvalue);
    editor.putString("yourownkey3", yourvalue);
    startActivity(intent)

and in next activity

sp = getSharedPreferences(MYPREFERNCES_Example, 0);   
editor = sp.edit();  
String fn = sp.getString("yourownkey1", "");
String ln = sp.getString("yourownkey2", "");
String fbemail = sp.getString("yourownkey3", "");

Upvotes: 0

AndroidDevUser
AndroidDevUser

Reputation: 201

editor.commit() is missing. Better way is to use bundle that could be set in intent and use this intent to start another activity and then fetch values from intent's bundle.

Upvotes: 0

Anatoliy Svyrydenko
Anatoliy Svyrydenko

Reputation: 1

If you are using SharedPreffernces just to share data between activities, then it's overkill.

In case data should be available after app restart your solutions is good. But if you need it only at runtime, it's better to use Intent as mentioned in other answers.

Personally, I would prefer to store it in some static variable.

Upvotes: 0

debugger
debugger

Reputation: 640

Yeah you can make use of SharedPreference to Store the information.

To pass the data from one activity to another its better to use intent.

    Intent intent = new Intent(CurrentActivity.this, AnotherActivity.class);
    intent.putExtra("file_name","name");
    intent.putExtra("file_path","path");
    startActivity(intent)

In another Activity,

String fileName = getIntent().getStringExtra("file_name");
String filePath = getIntent().getStringExtra("file_path");

Upvotes: 0

Dus
Dus

Reputation: 4230

Why do you need to overload the system ? you have a mechanism for passing data between activities, just send the path of the file within the intent.

In ActivityA :

Intent intent = new Intent(ActivityA.this, ActivityB.class);
intent.putExtra("filePath", "...");
startActivity(intent);

In ActivityB :

String filePath = getIntent().getExtras().getString("filePath");

Upvotes: 1

user7343325
user7343325

Reputation:

You have to apply the editor by

editor.commit():

or

editor.apply();

Upvotes: 2

andras
andras

Reputation: 3645

editor.apply() is missing. You are not committing the save.

Upvotes: 1

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