Question

I am very new to java and android but doing my best to make an app, basicaly I want a page with 6 text boxes on it, and each allows the user to type a 3 digit unique value into each, check a confirm box and then a button to save, then when the user revisits this part of the app the data will still be there, I managed to get it working for 1 box but if i add another it just duplicated box 1s value, here is my code for the class

public class Settings extends Activity implements OnClickListener {

CheckBox cb;
EditText et, et1;
Button b;
String test;


@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.settings);

    cb = (CheckBox) findViewById(R.id.checkBox1);
    et = (EditText) findViewById(R.id.editText1);
    b = (Button) findViewById(R.id.button1);
    b.setOnClickListener(this);
    loadPrefs();
    cb.setChecked(false);       

}

private void loadPrefs() {

    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
    boolean cbValue = sp.getBoolean("CHECKBOX", false);
    String name = sp.getString("NAME", "Kg");
    if(cbValue){
        cb.setChecked(true);
    }else{
        cb.setChecked(false);
    }
    et.setText(name + (" kg"));
    }




private void savePrefs(String key, boolean value) {
    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
    Editor edit = sp.edit();
    edit.putBoolean(key, value);
    edit.commit();
}

private void savePrefs(String key, String value) {
    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
    Editor edit = sp.edit();
    edit.putString(key, value);
    edit.commit();
}

public void onClick(View v) {
    // TODO Auto-generated method stub
    savePrefs("CHECKBOX", cb.isChecked());
    if (cb.isChecked())
        savePrefs("NAME", et.getText().toString());

    finish();
}

}

any help would be greatly appreciated as time is short 🙁

Answer 1

Read this.

What you’re not coding is saving the data.

 SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
 boolean cbValue = sp.getBoolean("CHECKBOX", false);

What the second line does is says, is “CHECKBOX” a saved sharedpreference? No, it isn’t. Okay let’s get the default value of false then.

What you need to do is save it using this:

SharedPreferences.editor Editor = sp.edit();
Editor.putBoolean("CHECKBOX",true);
Editor.commit();

The first line defines the sharedpreference editor. The next line saves the boolean value true under the in effect filename (key) of CHECKBOX and then the commit line says, okay do the above and finalise it so that now whenever I call:

sp.getBoolean("CHECKBOX",false);

I will get true because I won’t have to use the default value of false.