Android SharedPreferencesUtils封装使用

记录一下sp的封装使用

public class SharedPreferencesUtils {
private SharedPreferences preferences;
private SharedPreferences.Editor editor;
private Context context;
private String fileName;

public SharedPreferences getSPreferences() {
    return preferences;
}

public static SharedPreferencesUtils getInstance(String fileName) {
    return new SharedPreferencesUtils(MainApplication.getContext(), fileName);
}

@SuppressLint({"WorldReadableFiles", "WorldWriteableFiles"})
public SharedPreferencesUtils(Context context, String fileName) {
    this.context = context;
    this.fileName = fileName;
    if (TextUtils.isEmpty(fileName)) {
        this.fileName = StringUtils.packageName + "_prefers";
    }
    try {
        preferences = context.getSharedPreferences(fileName, Context.MODE_WORLD_READABLE | Context.MODE_WORLD_WRITEABLE);
    } catch (SecurityException e) {
        preferences = context.getSharedPreferences(fileName, Context.MODE_PRIVATE);
        makeWorldReadable(context, fileName);
    }
    editor = preferences.edit();
}

@SuppressLint("SetWorldReadable")
public static void makeWorldReadable(Context context, String preferName) {
    try {
        File sharedPreferDir = new File(context.getApplicationInfo().dataDir, "shared_prefs");
        File prefsFile = new File(sharedPreferDir, preferName + ".xml");
        prefsFile.setReadable(true, false);
        prefsFile.setExecutable(true, false);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public Object getValue(String key, Object defValue) {
    if (preferences == null) {
        return defValue;
    }
    if (defValue instanceof String) {
        return preferences.getString(key, (String) defValue);
    }
    if (defValue instanceof Boolean) {
        return preferences.getBoolean(key, (Boolean) defValue);
    }
    if (defValue instanceof Integer) {
        return preferences.getInt(key, (Integer) defValue);
    }
    if (defValue instanceof Long) {
        return preferences.getLong(key, (Long) defValue);
    }
    if (defValue instanceof Float) {
        return preferences.getFloat(key, (Float) defValue);
    }
    if (defValue instanceof Set<?>) {
        return preferences.getStringSet(key, (Set<String>) defValue);
    }
    return defValue;
}

public boolean setValue(String key, Object defValue) {
    if (preferences == null) return false;
    if (defValue instanceof String) {
        editor.putString(key, (String) defValue);
    }
    if (defValue instanceof Boolean) {
        editor.putBoolean(key, (Boolean) defValue);
    }
    if (defValue instanceof Integer) {
        editor.putInt(key, (Integer) defValue);
    }
    if (defValue instanceof Long) {
        editor.putLong(key, (Long) defValue);
    }
    if (defValue instanceof Float) {
        editor.putFloat(key, (Float) defValue);
    }
    if (defValue instanceof Set<?>) {
        remove(key);
        editor.putStringSet(key, (Set<String>) defValue);
    }
    boolean isCommit = editor.commit();
    if (isCommit) {
        makeWorldReadable(context, fileName);
    }
    return isCommit;
}

public Map<String, ?> getAll() {
    return preferences.getAll();
}

public boolean clear() {
    boolean isCommit = editor.clear().commit();
    if (isCommit) {
        makeWorldReadable(context, fileName);
    }
    return isCommit;
}

public boolean remove(String key) {
    boolean isCommit = editor.remove(key).commit();
    if (isCommit) {
        makeWorldReadable(context, fileName);
    }
    return isCommit;
}
}

用法也很简单，示例如下：

SharedPreferencesUtils preferencesUtils = new SharedPreferencesUtils(context, "config");
//设置键值对
//isCommit为true则保存成功，反之则失败
boolean isCommit = preferencesUtils.setValue("key","value");
//获取键值对
String value = (String) preferencesUtils.getValue("key","默认值");