Android 常見工具類封裝

本文轉載自查看原文 2015-04-13 16:23 23013 Android

1，MD5工具類：

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();
            // 獲得MD5摘要算法的 MessageDigest 對象
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
            // 使用指定的字節更新摘要
            mdInst.update(btInput);
            // 獲得密文
            byte[] md = mdInst.digest();
            // 把密文轉換成十六進制的字符串形式
            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，線程睡眠

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，檢查網絡是否連通

 /**
     * 檢查網絡是否連通
     * 
     * @return boolean
     * @since V1.0
     */
    public boolean isNetworkAvailable(Context context) {
        // 創建並初始化連接對象
        ConnectivityManager connMan = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        // 判斷初始化是否成功並作出相應處理
        if (connMan != null) {
            // 調用getActiveNetworkInfo方法創建對象,如果不為空則表明網絡連通，否則沒連通
            NetworkInfo info = connMan.getActiveNetworkInfo();
            if (info != null) {
                return info.isAvailable();
            }
        }
        return false;
    }

4，異常類捕捉

/**
 * UncaughtException處理類,當程序發生Uncaught異常的時候,由該類來接管程序,並記錄發送錯誤報告. 需要在Application中注冊，為了要在程序啟動器就監控整個程序。
 */
public class CrashHandler implements UncaughtExceptionHandler {
    /** TAG */
    public static final String              TAG       = "CrashHandler";
    /** 系統默認的UncaughtException處理類 */
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    /** CrashHandler實例 */
    private static CrashHandler             mCrashHandler;
    /** 程序的Context對象 */
    private Context                         mContext;
    /** 用來存儲設備信息和異常信息 */
    private Map<String, String>             infos     = new HashMap<String, String>();
    /** 用於格式化日期,作為日志文件名的一部分 */
    private DateFormat                      formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    /**
     * 私有構造函數
     */
    private CrashHandler() {

    }

    /**
     * 獲取CrashHandler實例 ,單例模式
     * 
     * @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;
        // 獲取系統默認的UncaughtException處理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        // 設置該CrashHandler為程序的默認處理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 當UncaughtException發生時會轉入該函數來處理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            // 如果用戶沒有處理則讓系統默認的異常處理器來處理
            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);
        }
    }

    /**
     * 自定義錯誤處理,收集錯誤信息 發送錯誤報告等操作均在此完成.
     * 
     * @param ex
     * @return true:如果處理了該異常信息;否則返回false.
     * @since V1.0
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }

        // 收集設備參數信息
        collectDeviceInfo(mContext);

        // 使用Toast來顯示異常信息
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "很抱歉,程序出現異常,即將退出.", Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        }.start();

        // 保存日志文件
        saveCatchInfo2File(ex);
        return true;
    }

    /**
     * 收集設備參數信息
     * 
     * @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);
            }
        }
    }

    /**
     * 保存錯誤信息到文件中
     * 
     * @param ex
     * @return 返回文件名稱,便於將文件傳送到服務器
     */
    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());
                // 發送給開發人員
                sendCrashLog2PM(path + fileName);
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            CLog.e(TAG, "saveCatchInfo2File() an error occured while writing file... Exception:", e);
        }
        return null;
    }

    /**
     * 將捕獲的導致崩潰的錯誤信息發送給開發人員 目前只將log日志保存在sdcard 和輸出到LogCat中，並未發送給后台。
     * 
     * @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;
                // 由於目前尚未確定以何種方式發送，所以先打出log日志。
                CLog.e(TAG, s);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally { // 關閉流
            try {
                reader.close();
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

5，彈出框提醒

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

6，圖片API類

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，提醒封裝類

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();
    }