Android(安卓)常见工具类封装

1，MD5工具类：

public class MD5Util {    public final static String MD5(String s) {        char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',                'a', 'b', 'c', 'd', 'e', 'f' };        try {            byte[] btInput = s.getBytes();            // 获得MD5摘要算法的 MessageDigest 对象            MessageDigest mdInst = MessageDigest.getInstance("MD5");            // 使用指定的字节更新摘要            mdInst.update(btInput);            // 获得密文            byte[] md = mdInst.digest();            // 把密文转换成十六进制的字符串形式            int j = md.length;            char str[] = new char[j * 2];            int k = 0;            for (int i = 0; i < j; i++) {                byte byte0 = md[i];                str[k++] = hexDigits[byte0 >>> 4 & 0xf];                str[k++] = hexDigits[byte0 & 0xf];            }            return new String(str);        } catch (Exception e) {            return null;        }    }    public static void main(String[] args) {        System.out.print(MD5Util.MD5("password"));    }}

2，线程睡眠

public class CSleep {    public static final long DEFAULT_SLEEP_TIME = 500;    private boolean          isRuning           = false;    public boolean isRuning() {        return isRuning;    }    public void runWithTime(final long defaultSleepTime) {        isRuning = true;        new Thread() {            @Override            public void run() {                try {                    sleep(defaultSleepTime, 0);                } catch (InterruptedException e) {                    e.printStackTrace();                }                isRuning = false;                super.run();            }        }.start();    }}

3，检查网络是否连通

 /**     * 检查网络是否连通     *      * @return boolean     * @since V1.0     */    public boolean isNetworkAvailable(Context context) {        // 创建并初始化连接对象        ConnectivityManager connMan = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);        // 判断初始化是否成功并作出相应处理        if (connMan != null) {            // 调用getActiveNetworkInfo方法创建对象,如果不为空则表明网络连通，否则没连通            NetworkInfo info = connMan.getActiveNetworkInfo();            if (info != null) {                return info.isAvailable();            }        }        return false;    }

4，异常类捕捉

/** * UncaughtException处理类,当程序发生Uncaught异常的时候,由该类来接管程序,并记录发送错误报告. 需要在Application中注册，为了要在程序启动器就监控整个程序。 */public class CrashHandler implements UncaughtExceptionHandler {    /** TAG */    public static final String              TAG       = "CrashHandler";    /** 系统默认的UncaughtException处理类 */    private Thread.UncaughtExceptionHandler mDefaultHandler;    /** CrashHandler实例 */    private static CrashHandler             mCrashHandler;    /** 程序的Context对象 */    private Context                         mContext;    /** 用来存储设备信息和异常信息 */    private Map<String, String>             infos     = new HashMap<String, String>();    /** 用于格式化日期,作为日志文件名的一部分 */    private DateFormat                      formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");    /**     * 私有构造函数     */    private CrashHandler() {    }    /**     * 获取CrashHandler实例 ,单例模式     *      * @return     * @since V1.0     */    public static CrashHandler getInstance() {        if (mCrashHandler == null)            mCrashHandler = new CrashHandler();        return mCrashHandler;    }    /**     * 初始化     *      * @param context     * @since V1.0     */    public void init(Context context) {        mContext = context;        // 获取系统默认的UncaughtException处理器        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();        // 设置该CrashHandler为程序的默认处理器        Thread.setDefaultUncaughtExceptionHandler(this);    }    /**     * 当UncaughtException发生时会转入该函数来处理     */    @Override    public void uncaughtException(Thread thread, Throwable ex) {        if (!handleException(ex) && mDefaultHandler != null) {            // 如果用户没有处理则让系统默认的异常处理器来处理            mDefaultHandler.uncaughtException(thread, ex);        } else {            try {                Thread.sleep(3000);            } catch (InterruptedException e) {                CLog.e(TAG, "uncaughtException() InterruptedException:" + e);            }            // 退出程序            android.os.Process.killProcess(android.os.Process.myPid());            System.exit(1);        }    }    /**     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.     *      * @param ex     * @return true:如果处理了该异常信息;否则返回false.     * @since V1.0     */    private boolean handleException(Throwable ex) {        if (ex == null) {            return false;        }        // 收集设备参数信息        collectDeviceInfo(mContext);        // 使用Toast来显示异常信息        new Thread() {            @Override            public void run() {                Looper.prepare();                Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.", Toast.LENGTH_SHORT).show();                Looper.loop();            }        }.start();        // 保存日志文件        saveCatchInfo2File(ex);        return true;    }    /**     * 收集设备参数信息     *      * @param ctx     * @since V1.0     */    public void collectDeviceInfo(Context ctx) {        try {            PackageManager pm = ctx.getPackageManager();            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);            if (pi != null) {                String versionName = pi.versionName == null ? "null" : pi.versionName;                String versionCode = pi.versionCode + "";                infos.put("versionName", versionName);                infos.put("versionCode", versionCode);            }        } catch (NameNotFoundException e) {            CLog.e(TAG, "collectDeviceInfo() an error occured when collect package info NameNotFoundException:", e);        }        Field[] fields = Build.class.getDeclaredFields();        for (Field field : fields) {            try {                field.setAccessible(true);                infos.put(field.getName(), field.get(null).toString());                CLog.d(TAG, field.getName() + " : " + field.get(null));            } catch (Exception e) {                CLog.e(TAG, "collectDeviceInfo() an error occured when collect crash info Exception:", e);            }        }    }    /**     * 保存错误信息到文件中     *      * @param ex     * @return 返回文件名称,便于将文件传送到服务器     */    private String saveCatchInfo2File(Throwable ex) {        StringBuffer sb = new StringBuffer();        for (Map.Entry<String, String> entry : infos.entrySet()) {            String key = entry.getKey();            String value = entry.getValue();            sb.append(key + "=" + value + "\n");        }        Writer writer = new StringWriter();        PrintWriter printWriter = new PrintWriter(writer);        ex.printStackTrace(printWriter);        Throwable cause = ex.getCause();        while (cause != null) {            cause.printStackTrace(printWriter);            cause = cause.getCause();        }        printWriter.close();        String result = writer.toString();        sb.append(result);        try {            long timestamp = System.currentTimeMillis();            String time = formatter.format(new Date());            String fileName = "crash-" + time + "-" + timestamp + ".log";            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {                String path = FilePathUtil.getiVMSDirPath() + "/crash/";                File dir = new File(path);                if (!dir.exists()) {                    dir.mkdirs();                }                FileOutputStream fos = new FileOutputStream(path + fileName);                fos.write(sb.toString().getBytes());                // 发送给开发人员                sendCrashLog2PM(path + fileName);                fos.close();            }            return fileName;        } catch (Exception e) {            CLog.e(TAG, "saveCatchInfo2File() an error occured while writing file... Exception:", e);        }        return null;    }    /**     * 将捕获的导致崩溃的错误信息发送给开发人员 目前只将log日志保存在sdcard 和输出到LogCat中，并未发送给后台。     *      * @param fileName     * @since V1.0     */    private void sendCrashLog2PM(String fileName) {        if (!new File(fileName).exists()) {            CLog.e(TAG, "sendCrashLog2PM() 日志文件不存在");            return;        }        FileInputStream fis = null;        BufferedReader reader = null;        String s = null;        try {            fis = new FileInputStream(fileName);            reader = new BufferedReader(new InputStreamReader(fis, "GBK"));            while (true) {                s = reader.readLine();                if (s == null)                    break;                // 由于目前尚未确定以何种方式发送，所以先打出log日志。                CLog.e(TAG, s);            }        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } finally { // 关闭流            try {                reader.close();                fis.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }}

5，弹出框提醒

 public static Dialog showDialog(Context ctx, int layViewID, int ThemeType) {        Dialog res = new Dialog(ctx, ThemeType);        res.setContentView(layViewID);        return res;    }

6，图片API类

public class ImageAPI {    public static Bitmap getImageByFilePath(String filePath, int scale) {        Bitmap res = null;        BitmapFactory.Options options = new BitmapFactory.Options();        options.inJustDecodeBounds = true;        BitmapFactory.decodeFile(filePath, options);        options.inJustDecodeBounds = false;        options.inSampleSize = scale;        options.inPreferredConfig = Bitmap.Config.ARGB_4444;        return res;    }    public static Bitmap getImageByFilePath(String filePath, int Towidth, int ToHeight) {        Bitmap res = null;        BitmapFactory.Options options = new BitmapFactory.Options();        options.inJustDecodeBounds = true;        if (!new File(filePath).exists())            return res;        BitmapFactory.decodeFile(filePath, options);        int origionalWidth = options.outHeight;        int origionalHeight = options.outWidth;        options.inJustDecodeBounds = false;        int scale = Math.max(origionalWidth / Towidth, origionalHeight / ToHeight);        options.inSampleSize = scale;        options.inPreferredConfig = Bitmap.Config.ARGB_4444;        try {            res = BitmapFactory.decodeFile(filePath, options);        } catch (Exception e) {            e.printStackTrace();            return null;        } catch (OutOfMemoryError e) {            e.printStackTrace();            return null;        }        return res;    }}

10，提醒封装类

public static void showToast(Context ctx, int id, String str) {        if (str == null) {            return;        }        Toast toast = Toast.makeText(ctx, ctx.getString(id) + str, Toast.LENGTH_SHORT);        toast.setGravity(Gravity.CENTER, 0, 0);        toast.show();    }    public static void showToast(Context ctx, String errInfo) {        if (errInfo == null) {            return;        }        Toast toast = Toast.makeText(ctx, errInfo, Toast.LENGTH_SHORT);        toast.setGravity(Gravity.CENTER, 0, 0);        toast.show();    }

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