Android: persist instance state across multiple sessions

freyo

JOINED:
07/27/2010: POSTS:
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July 21, 2011 15:53:47 Last update:July 21, 2011 15:53:47UseSharedPreferencesto persist an instance state. The state is saved even when the app is killed.

public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    SharedPreferences prefs = getPreferences(Context.MODE_PRIVATE);            powerStatus = prefs.getString("power", "On");    RadioGroup rg = (RadioGroup) findViewById(R.id.radioGroup1);    int n = rg.getChildCount();    for (int i = 0; i < n; i++) {RadioButton rb = (RadioButton) rg.getChildAt(i);if (powerStatus.equals(rb.getText().toString())) {    rg.check(rb.getId());    break;}    }}      public void setValues(View view) {    RadioGroup rg = (RadioGroup) findViewById(R.id.radioGroup1);    powerStatus = ((RadioButton) findViewById(rg.getCheckedRadioButtonId())).getText().toString();            SharedPreferences prefs = getPreferences(Context.MODE_PRIVATE);    // Use Editor to change values    SharedPreferences.Editor editor = prefs.edit();    editor.putString("power", powerStatus);     // do not forget to commit the changes!    editor.commit();}

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