Android---工具类

1、日志工具类

import android.util.Log;  /**  * Log统一管理类  *    */  public class L  {      private L()      {          /* cannot be instantiated */          throw new UnsupportedOperationException("cannot be instantiated");      }      public static boolean isDebug = true;// 是否需要打印bug，可以在application的onCreate函数里面初始化      private static final String TAG = "way";      // 下面四个是默认tag的函数      public static void i(String msg)      {          if (isDebug)              Log.i(TAG, msg);      }      public static void d(String msg)      {          if (isDebug)              Log.d(TAG, msg);      }      public static void e(String msg)      {          if (isDebug)              Log.e(TAG, msg);      }      public static void v(String msg)      {          if (isDebug)              Log.v(TAG, msg);      }      // 下面是传入自定义tag的函数      public static void i(String tag, String msg)      {          if (isDebug)              Log.i(tag, msg);      }      public static void d(String tag, String msg)      {          if (isDebug)              Log.i(tag, msg);      }      public static void e(String tag, String msg)      {          if (isDebug)              Log.i(tag, msg);      }      public static void v(String tag, String msg)      {          if (isDebug)              Log.i(tag, msg);      }  }  

2、Toast统一管理类

import android.content.Context;  import android.widget.Toast;  /**  * Toast统一管理类  *   */  public class T  {      private T()      {          /* cannot be instantiated */          throw new UnsupportedOperationException("cannot be instantiated");      }      public static boolean isShow = true;      /**      * 短时间显示Toast      *       * @param context      * @param message      */      public static void showShort(Context context, CharSequence message)      {          if (isShow)              Toast.makeText(context, message, Toast.LENGTH_SHORT).show();      }      /**      * 短时间显示Toast      *       * @param context      * @param message      */      public static void showShort(Context context, int message)      {          if (isShow)              Toast.makeText(context, message, Toast.LENGTH_SHORT).show();      }      /**      * 长时间显示Toast      *       * @param context      * @param message      */      public static void showLong(Context context, CharSequence message)      {          if (isShow)              Toast.makeText(context, message, Toast.LENGTH_LONG).show();      }      /**      * 长时间显示Toast      *       * @param context      * @param message      */      public static void showLong(Context context, int message)      {          if (isShow)              Toast.makeText(context, message, Toast.LENGTH_LONG).show();      }      /**      * 自定义显示Toast时间      *       * @param context      * @param message      * @param duration      */      public static void show(Context context, CharSequence message, int duration)      {          if (isShow)              Toast.makeText(context, message, duration).show();      }      /**      * 自定义显示Toast时间      *       * @param context      * @param message      * @param duration      */      public static void show(Context context, int message, int duration)      {          if (isShow)              Toast.makeText(context, message, duration).show();      }  }  

3、SharedPreferences封装类SPUtils

import java.lang.reflect.InvocationTargetException;  import java.lang.reflect.Method;  import java.util.Map;  import android.content.Context;  import android.content.SharedPreferences;  public class SPUtils  {      /**      * 保存在手机里面的文件名      */      public static final String FILE_NAME = "share_data";      /**      * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法      *       * @param context      * @param key      * @param object      */      public static void put(Context context, String key, Object object)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          SharedPreferences.Editor editor = sp.edit();          if (object instanceof String)          {              editor.putString(key, (String) object);          } else if (object instanceof Integer)          {              editor.putInt(key, (Integer) object);          } else if (object instanceof Boolean)          {              editor.putBoolean(key, (Boolean) object);          } else if (object instanceof Float)          {              editor.putFloat(key, (Float) object);          } else if (object instanceof Long)          {              editor.putLong(key, (Long) object);          } else          {              editor.putString(key, object.toString());          }          SharedPreferencesCompat.apply(editor);      }      /**      * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值      *       * @param context      * @param key      * @param defaultObject      * @return      */      public static Object get(Context context, String key, Object defaultObject)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          if (defaultObject instanceof String)          {              return sp.getString(key, (String) defaultObject);          } else if (defaultObject instanceof Integer)          {              return sp.getInt(key, (Integer) defaultObject);          } else if (defaultObject instanceof Boolean)          {              return sp.getBoolean(key, (Boolean) defaultObject);          } else if (defaultObject instanceof Float)          {              return sp.getFloat(key, (Float) defaultObject);          } else if (defaultObject instanceof Long)          {              return sp.getLong(key, (Long) defaultObject);          }          return null;      }      /**      * 移除某个key值已经对应的值      * @param context      * @param key      */      public static void remove(Context context, String key)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          SharedPreferences.Editor editor = sp.edit();          editor.remove(key);          SharedPreferencesCompat.apply(editor);      }      /**      * 清除所有数据      * @param context      */      public static void clear(Context context)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          SharedPreferences.Editor editor = sp.edit();          editor.clear();          SharedPreferencesCompat.apply(editor);      }      /**      * 查询某个key是否已经存在      * @param context      * @param key      * @return      */      public static boolean contains(Context context, String key)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          return sp.contains(key);      }      /**      * 返回所有的键值对      *       * @param context      * @return      */      public static Map<String, ?> getAll(Context context)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          return sp.getAll();      }      /**      * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类      *       * @author zhy      *       */      private static class SharedPreferencesCompat      {          private static final Method sApplyMethod = findApplyMethod();          /**          * 反射查找apply的方法          *           * @return          */          @SuppressWarnings({ "unchecked", "rawtypes" })          private static Method findApplyMethod()          {              try              {                  Class clz = SharedPreferences.Editor.class;                  return clz.getMethod("apply");              } catch (NoSuchMethodException e)              {              }              return null;          }          /**          * 如果找到则使用apply执行，否则使用commit          *           * @param editor          */          public static void apply(SharedPreferences.Editor editor)          {              try              {                  if (sApplyMethod != null)                  {                      sApplyMethod.invoke(editor);                      return;                  }              } catch (IllegalArgumentException e)              {              } catch (IllegalAccessException e)              {              } catch (InvocationTargetException e)              {              }              editor.commit();          }      }  }  

4、单位转换类 DensityUtils

import android.content.Context;  import android.util.TypedValue;  /**  * 常用单位转换的辅助类  *   *   *   */  public class DensityUtils  {      private DensityUtils()      {          /* cannot be instantiated */          throw new UnsupportedOperationException("cannot be instantiated");      }      /**      * dp转px      *       * @param context      * @param val      * @return      */      public static int dp2px(Context context, float dpVal)      {          return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,                  dpVal, context.getResources().getDisplayMetrics());      }      /**      * sp转px      *       * @param context      * @param val      * @return      */      public static int sp2px(Context context, float spVal)      {          return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,                  spVal, context.getResources().getDisplayMetrics());      }      /**      * px转dp      *       * @param context      * @param pxVal      * @return      */      public static float px2dp(Context context, float pxVal)      {          final float scale = context.getResources().getDisplayMetrics().density;          return (pxVal / scale);      }      /**      * px转sp      *       * @param fontScale      * @param pxVal      * @return      */      public static float px2sp(Context context, float pxVal)      {          return (pxVal / context.getResources().getDisplayMetrics().scaledDensity);      }  }  

5、SD卡相关辅助类 SDCardUtils

import java.io.File;  import android.os.Environment;  import android.os.StatFs;  /**  * SD卡相关的辅助类  */  public class SDCardUtils  {      private SDCardUtils()      {          /* cannot be instantiated */          throw new UnsupportedOperationException("cannot be instantiated");      }      /**      * 判断SDCard是否可用      *       * @return      */      public static boolean isSDCardEnable()      {          return Environment.getExternalStorageState().equals(                  Environment.MEDIA_MOUNTED);      }      /**      * 获取SD卡路径      *       * @return      */      public static String getSDCardPath()      {          return Environment.getExternalStorageDirectory().getAbsolutePath()                  + File.separator;      }      /**      * 获取SD卡的剩余容量 单位byte      *       * @return      */      public static long getSDCardAllSize()      {          if (isSDCardEnable())          {              StatFs stat = new StatFs(getSDCardPath());              // 获取空闲的数据块的数量              long availableBlocks = (long) stat.getAvailableBlocks() - 4;              // 获取单个数据块的大小（byte）              long freeBlocks = stat.getAvailableBlocks();              return freeBlocks * availableBlocks;          }          return 0;      }      /**      * 获取指定路径所在空间的剩余可用容量字节数，单位byte      *       * @param filePath      * @return 容量字节 SDCard可用空间，内部存储可用空间      */      public static long getFreeBytes(String filePath)      {          // 如果是sd卡的下的路径，则获取sd卡可用容量          if (filePath.startsWith(getSDCardPath()))          {              filePath = getSDCardPath();          } else          {// 如果是内部存储的路径，则获取内存存储的可用容量              filePath = Environment.getDataDirectory().getAbsolutePath();          }          StatFs stat = new StatFs(filePath);          long availableBlocks = (long) stat.getAvailableBlocks() - 4;          return stat.getBlockSize() * availableBlocks;      }      /**      * 获取系统存储路径      *       * @return      */      public static String getRootDirectoryPath()      {          return Environment.getRootDirectory().getAbsolutePath();      }  }  

6、屏幕相关辅助类 ScreenUtils

import android.app.Activity;  import android.content.Context;  import android.graphics.Bitmap;  import android.graphics.Rect;  import android.util.DisplayMetrics;  import android.view.View;  import android.view.WindowManager;  /**  * 获得屏幕相关的辅助类   */  public class ScreenUtils  {      private ScreenUtils()      {          /* cannot be instantiated */          throw new UnsupportedOperationException("cannot be instantiated");      }      /**      * 获得屏幕高度      *       * @param context      * @return      */      public static int getScreenWidth(Context context)      {          WindowManager wm = (WindowManager) context                  .getSystemService(Context.WINDOW_SERVICE);          DisplayMetrics outMetrics = new DisplayMetrics();          wm.getDefaultDisplay().getMetrics(outMetrics);          return outMetrics.widthPixels;      }      /**      * 获得屏幕宽度      *       * @param context      * @return      */      public static int getScreenHeight(Context context)      {          WindowManager wm = (WindowManager) context                  .getSystemService(Context.WINDOW_SERVICE);          DisplayMetrics outMetrics = new DisplayMetrics();          wm.getDefaultDisplay().getMetrics(outMetrics);          return outMetrics.heightPixels;      }      /**      * 获得状态栏的高度      *       * @param context      * @return      */      public static int getStatusHeight(Context context)      {          int statusHeight = -1;          try          {              Class<?> clazz = Class.forName("com.android.internal.R$dimen");              Object object = clazz.newInstance();              int height = Integer.parseInt(clazz.getField("status_bar_height")                      .get(object).toString());              statusHeight = context.getResources().getDimensionPixelSize(height);          } catch (Exception e)          {              e.printStackTrace();          }          return statusHeight;      }      /**      * 获取当前屏幕截图，包含状态栏      *       * @param activity      * @return      */      public static Bitmap snapShotWithStatusBar(Activity activity)      {          View view = activity.getWindow().getDecorView();          view.setDrawingCacheEnabled(true);          view.buildDrawingCache();          Bitmap bmp = view.getDrawingCache();          int width = getScreenWidth(activity);          int height = getScreenHeight(activity);          Bitmap bp = null;          bp = Bitmap.createBitmap(bmp, 0, 0, width, height);          view.destroyDrawingCache();          return bp;      }      /**      * 获取当前屏幕截图，不包含状态栏      *       * @param activity      * @return      */      public static Bitmap snapShotWithoutStatusBar(Activity activity)      {          View view = activity.getWindow().getDecorView();          view.setDrawingCacheEnabled(true);          view.buildDrawingCache();          Bitmap bmp = view.getDrawingCache();          Rect frame = new Rect();          activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);          int statusBarHeight = frame.top;          int width = getScreenWidth(activity);          int height = getScreenHeight(activity);          Bitmap bp = null;          bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height                  - statusBarHeight);          view.destroyDrawingCache();          return bp;      }  }  

7、App相关辅助类

import android.content.Context;  import android.content.pm.PackageInfo;  import android.content.pm.PackageManager;  import android.content.pm.PackageManager.NameNotFoundException;  /**  * 跟App相关的辅助类  *   *   *   */  public class AppUtils  {      private AppUtils()      {          /* cannot be instantiated */          throw new UnsupportedOperationException("cannot be instantiated");      }      /**      * 获取应用程序名称      */      public static String getAppName(Context context)      {          try          {              PackageManager packageManager = context.getPackageManager();              PackageInfo packageInfo = packageManager.getPackageInfo(                      context.getPackageName(), 0);              int labelRes = packageInfo.applicationInfo.labelRes;              return context.getResources().getString(labelRes);          } catch (NameNotFoundException e)          {              e.printStackTrace();          }          return null;      }      /**      * [获取应用程序版本名称信息]      *       * @param context      * @return 当前应用的版本名称      */      public static String getVersionName(Context context)      {          try          {              PackageManager packageManager = context.getPackageManager();              PackageInfo packageInfo = packageManager.getPackageInfo(                      context.getPackageName(), 0);              return packageInfo.versionName;          } catch (NameNotFoundException e)          {              e.printStackTrace();          }          return null;      }  }  

8、软键盘相关辅助类KeyBoardUtils

import android.content.Context;  import android.view.inputmethod.InputMethodManager;  import android.widget.EditText;  /**  * 打开或关闭软键盘  *   * @author zhy  *   */  public class KeyBoardUtils  {      /**      * 打卡软键盘      *       * @param mEditText      *            输入框      * @param mContext      *            上下文      */      public static void openKeybord(EditText mEditText, Context mContext)      {          InputMethodManager imm = (InputMethodManager) mContext                  .getSystemService(Context.INPUT_METHOD_SERVICE);          imm.showSoftInput(mEditText, InputMethodManager.RESULT_SHOWN);          imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,                  InputMethodManager.HIDE_IMPLICIT_ONLY);      }      /**      * 关闭软键盘      *       * @param mEditText      *            输入框      * @param mContext      *            上下文      */      public static void closeKeybord(EditText mEditText, Context mContext)      {          InputMethodManager imm = (InputMethodManager) mContext                  .getSystemService(Context.INPUT_METHOD_SERVICE);          imm.hideSoftInputFromWindow(mEditText.getWindowToken(), 0);      }  }  

9、MD5工具类

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;        }    }

10、异常捕捉类

/** * 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();            }        }    }}

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