实用代码块记录5

来源：互联网发布：加工中心怎么手动编程编辑：程序博客网时间：2024/06/09 15:23
PreferenceUtils

import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;import android.content.Context;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;/** * SharedPreferences配置保存工具 *  */public class PreferenceUtils {    private SharedPreferences mShared;    /**     * 构建配置工具     *      * @param context     *            设备上下文环境     * @param name     *            配置文件名     */    public PreferenceUtils(Context context, String name) {        mShared = context.getSharedPreferences(name, 0);    }    /**     * 保存boolean值     *      * @param key     *            键     * @param value     *            值     */    public void put(String key, boolean value) {        Editor editor = mShared.edit();        editor.putBoolean(key, value);        editor.commit();    }    /**     * 获取boolean值     *      * @param key     *            键     * @return 查找不到值，默认返回false     */    public boolean getBoolean(String key) {        return getBoolean(key, false);    }    /**     * 获取boolean值     *      * @param key     *            键     * @param defValue     *            默认返回值     * @return 值     */    public boolean getBoolean(String key, boolean defValue) {        return mShared.getBoolean(key, defValue);    }    /**     * 保存float值     *      * @param key     *            键     * @param value     *            值     */    public void put(String key, float value) {        Editor editor = mShared.edit();        editor.putFloat(key, value);        editor.commit();    }    /**     * 获取float值     *      * @param key     *            键     * @return 查找不到值，默认返回0     */    public float getFloat(String key) {        return getFloat(key, 0);    }    /**     * 获取float值     *      * @param key     *            键     * @param defValue     *            默认返回值     * @return 值     */    public float getFloat(String key, float defValue) {        return mShared.getFloat(key, defValue);    }    /**     * 保存int值     *      * @param key     *            键     * @param value     *            值     */    public void put(String key, int value) {        Editor editor = mShared.edit();        editor.putInt(key, value);        editor.commit();    }    /**     * 获取int值     *      * @param key     *            键     * @return 查找不到值，默认返回0     */    public int getInt(String key) {        return getInt(key, 0);    }    /**     * 获取int值     *      * @param key     *            键     * @param defValue     *            默认返回值     * @return 值     */    public int getInt(String key, int defValue) {        return mShared.getInt(key, defValue);    }    /**     * 保存long值     *      * @param key     *            键     * @param value     *            值     */    public void put(String key, long value) {        Editor editor = mShared.edit();        editor.putLong(key, value);        editor.commit();    }    /**     * 获取long值     *      * @param key     *            键     * @return 查找不到值，默认返回0     */    public long getLong(String key) {        return getLong(key, 0);    }    /**     * 获取long值     *      * @param key     *            键     * @param defValue     *            默认返回值     * @return 值     */    public long getLong(String key, long defValue) {        return mShared.getLong(key, defValue);    }    /**     * 保存String值     *      * @param key     *            键     * @param value     *            值     */    public void put(String key, String value) {        Editor editor = mShared.edit();        editor.putString(key, value);        editor.commit();    }    /**     * 获取String值     *      * @param key     *            键     * @return 查找不到值，默认返回null     */    public String getString(String key) {        return getString(key, null);    }    /**     * 获取String值     *      * @param key     *            键     * @param defValue     *            默认返回值     * @return 值     */    public String getString(String key, String defValue) {        return mShared.getString(key, defValue);    }    /**     * 保存序列化对象     *      * @param key     *            键     * @param value     *            值     */    public void put(String key, Serializable value) {        try {            ByteArrayOutputStream toByte = new ByteArrayOutputStream();            ObjectOutputStream oos = new ObjectOutputStream(toByte);            oos.writeObject(value);            String str = new String(SecurityUtils.encodeBASE64(toByte.toByteArray()));            Editor editor = mShared.edit();            editor.putString(key, str);            editor.commit();        } catch (IOException e) {        }    }    /**     * 获取序列化对象     *      * @param key     *            键     * @return 查找不到值，默认返回null     */    public Object get(String key) {        return get(key, null);    }    /**     * 获取序列化对象     *      * @param key     *            键     * @param defValue     *            默认返回值     * @return 值     */    public Object get(String key, Serializable defValue) {        String str = mShared.getString(key, null);        if (str == null) {            return defValue;        }        try {            byte[] baseBytes = SecurityUtils.decodeBASE64(str).getBytes();            ByteArrayInputStream fromeByte = new ByteArrayInputStream(baseBytes);            ObjectInputStream ois = new ObjectInputStream(fromeByte);            return ois.readObject();        } catch (Exception e) {        }        return defValue;    }    /**     * 清空保存的数据     */    public void clear() {        Editor editor = mShared.edit();        editor.clear();        editor.commit();    }}
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