How to save the state of Activity - Android
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onSaveInstanceState, onRestoreInstanceState , save preferences
int mCurrentPhotoIndex = 0;
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putInt("photo_index", mCurrentPhotoIndex);
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
mCurrentPhotoIndex = savedInstanceState.getInt("photo_index");
super.onRestoreInstanceState(savedInstanceState);
}
// or save preferences for new start of Activity in onStop
//onCreate or onResume or onStart etc.
public void loadPreferences() {
SharedPreferences settings = getSharedPreferences(F.PREFERENCES_NAME, 0);
mCurrentPhotoIndex = settings.getInt("mCurrentPhotoIndex",mCurrentPhotoIndex);
// String_sOtazka = settings.getString("_sOtazka", _sOtazka);
}
// onStop
public void savePreferences() {
SharedPreferences settings = getSharedPreferences(PREFERENCES_NAME, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putInt("mCurrentPhotoIndex", mCurrentPhotoIndex);
// String, boolean, float ...
// editor.putString("mButton1", mButton1.getText().toString());
editor.commit();
}
397LW NO topic_id
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Další témata ....(Topics)
Try add to AndroidManifest.xml configChanges for your Activity
android:configChanges="keyboardHidden|orientation|screenSize"
android:configChanges="keyboardHidden|orientation|screenSize"
<activity android:name=".MainActivity"
android:label="@string/app_name"
android:configChanges="keyboardHidden|orientation|screenSize"
>
- File->Project Structure Ctrl + Alt + Shift + S
- Select module and Dependencies Tab
- Click on + PLUS button (right upper corner)
- Select library
Click OK, OK

Eclipse make own color of toolbars, windows, status bar etc.
https://github.com/jeeeyul/eclipse-themes/wiki/Alternative-Install
https://github.com/jeeeyul/eclipse-themes/wiki/Alternative-Install


Issue: Cropped superscript index between tags sup /sup is not correctly visible in TextView or View as Button.

String s = "10<sup>12 </sup>";
textView.setText(Html.fromHtml(s)); // 12 will cropped
// solution:
s = "10<sup>12 </sup>\t "; // add behind ending of sup tag the tabulator \t,
// but not char \t but only press to TAB key!!! in source code
textView.setText(Html.fromHtml(s)); // 12 is visible correctly

Cycle for in Java example
public class MainClass {
public static void main(String[] arg) {
String[] arrayOfString = { "Hello", "people", "hello", "world!" };
for (int i = 0; // start position , first cycle i == 0
i < arrayOfString.length; // if i < 4 (length of array) do loop
i++ // incrementation after cycle
){
System.out.println(arrayOfString[i]);
// i++ incrementation
}
}
}
Editace: 2012-08-05 13:08:49
Počet článků v kategorii: 397
Url:how-to-save-the-state-of-activity-android
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