[Android] Stores array data to SharedPreferences, android Array

[Android] Stores array data to SharedPreferences, android Array
If you want array data (such as boolean [], int [], etc.) to SharedPreferences, We can first organize the array data into json data and store it in SharedPreferences, when reading the data, it is OK to parse the json data.

For example, I want to save the boolean [] array data:

public static void saveApkEnalbleArray(Context context,boolean[] booleanArray) {SharedPreferences prefs = context.getSharedPreferences(APK_ENABLE_ARRAY, Context.MODE_PRIVATE);JSONArray jsonArray = new JSONArray();for (boolean b : booleanArray) {jsonArray.put(b);}SharedPreferences.Editor editor = prefs.edit();editor.putString(APK_ENABLE_ARRAY,jsonArray.toString());editor.commit();}

Read data:

public static boolean[] getApkEnableArray(Context context,int arrayLength){SharedPreferences prefs = context.getSharedPreferences(APK_ENABLE_ARRAY, Context.MODE_PRIVATE);boolean[] resArray=new boolean[arrayLength]; Arrays.fill(resArray, true);try {    JSONArray jsonArray = new JSONArray(prefs.getString(APK_ENABLE_ARRAY, "[]"));    for (int i = 0; i < jsonArray.length(); i++) {    resArray[i] = jsonArray.getBoolean(i);    }} catch (Exception e) {    e.printStackTrace();}            return resArray;}

When saving some complex object arrays, gson can be used to process the conversion between json and object.

For the storage of sharedpreferences in Android, the source code is as follows:

Share. edit (). remove ("number" + arg2). remove ("name" + arg2). commit ();
Listitem. revome (arg2 );
ListItemAdapter. policydatasetchanged ();

Add these sentences to onItemClickListener.

Also, do not remember whether SimpleAdapter directly uses the rmove method. If so, you do not need to call yydatasetchanged ();

What should I do if SharedPreferences needs to save an array?

The method for saving simple arrays. This google can have! PutIntArray (int []) putStringArray (String [])