SharedPreferences tool class for Android, sharedpreferences

SharedPreferences tool class for Android, sharedpreferences

This tool is permanently maintained and updated. If you find any bug or error, please leave a message and the blogger will immediately correct it.

This tool provides the following functions:

1. Five types of data are stored;

2. read five types of data;

The content is as follows:

Import android. content. context; import android. content. sharedPreferences; import android. content. sharedPreferences. editor; /***** @ author bear ** SharedPrefereces tool class **/public class SharedPrefsUtil {/*** write int type data to SharedPreferences ** @ param context Environment * @ param name of the xml file * @ param key * @ param value */public static void putValue (Context context, string name, String key, int value) {Editor sp = getEditor (context, name); sp. putInt (key, value); sp. commit ();} /*** write boolean data to SharedPreferences ** @ param context * @ param name corresponding to the xml file name * @ param key * @ param value */ public static void putValue (Context context, string name, String key, boolean value) {Editor sp = getEditor (context, name); sp. putBoolean (key, value); sp. commit ();} /*** write String-type data to SharedPreferences ** @ param context * @ param name corresponds to the xml file name * @ param key * @ param value */ public static void putValue (Context context, string name, String key, String value) {Editor sp = getEditor (context, name); sp. putString (key, value); sp. commit ();} /*** write float data to SharedPreferences ** @ param context * @ param name corresponding to the xml file name * @ param key * @ param value */ public static void putValue (Context context, string name, String key, float value) {Editor sp = getEditor (context, name); sp. putFloat (key, value); sp. commit ();} /*** write long-type data to SharedPreferences ** @ param context * @ param name corresponds to the xml file name * @ param key * @ param value */ public static void putValue (Context context, string name, String key, long value) {Editor sp = getEditor (context, name); sp. putLong (key, value); sp. commit ();} /*** read int-type data from SharedPreferences ** @ param context * @ param name corresponds to the xml file name * @ param key * @ param defValue if no data is read if the call succeeds, the default value * @ return is used to return the read value */public static int getValue (Context context, string name, String key, int defValue) {SharedPreferences sp = getSharedPreferences (context, name); int value = sp. getInt (key, defValue); return value ;} /*** read boolean data from SharedPreferences ** @ param context * @ param name corresponds to the xml file name * @ param key * @ param defValue if no data is read if the call succeeds, the default value * @ return is used to return the read value */public static boolean getValue (Context context, string name, String key, boolean defValue) {SharedPreferences sp = getSharedPreferences (context, name); boolean value = sp. getBoolean (key, defValue); return value ;} /*** read String-type data from SharedPreferences ** @ param context * @ param name corresponds to the xml file name * @ param key * @ param defValue if no data is read if the call succeeds, the default value * @ return is used to return the read value */public static String getValue (Context context, string name, String key, String defValue) {SharedPreferences sp = getSharedPreferences (context, name); String value = sp. getString (key, defValue); return value ;} /*** read float data from SharedPreferences ** @ param context Environment * @ param name corresponding to xml file name * @ param key * @ param defValue if no data is read if the call succeeds, the default value * @ return is used to return the read value */public static float getValue (Context context, string name, String key, float defValue) {SharedPreferences sp = getSharedPreferences (context, name); float value = sp. getFloat (key, defValue); return value ;} /*** read data of the long type from SharedPreferences ** @ param context * @ param name corresponds to the xml file name * @ param key * @ param defValue if no data is read if the call succeeds, the default value * @ return is used to return the read value */public static long getValue (Context context, string name, String key, long defValue) {SharedPreferences sp = getSharedPreferences (context, name); long value = sp. getLong (key, defValue); return value;} // obtain the private static Editor getEditor (Context context, String name) {return getSharedPreferences (context, name) of the Editor instance ). edit () ;}// get the SharedPreferences instance private static SharedPreferences getSharedPreferences (Context context, String name) {return context. getSharedPreferences (name, Context. MODE_PRIVATE );}}

If your project supports version information Android API Level> = 11, you can also add the Set <String> type of storage and read.

Examples of calling methods in Activity or other places are as follows:

// Store data, and store the key-Value Pair ("color", "red") SharedPrefsUtil in the MySetting file. putValue (this, "MySetting", "color", "red ");

// Read data. Read the String color = SharedPrefsUtil. getValue (this, "MySetting", "color", "blue") with the key "color" from the MySetting file ");