转载请注明出处：http://blog.csdn.net/smartbetter/article/details/52709446

1.NetUtils（网络相关）

public class NetUtils {

    private NetUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 判断网络是否连接
     */
    public static boolean isConnected(Context context) {

        ConnectivityManager connectivity = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        if (null != connectivity) {
            NetworkInfo info = connectivity.getActiveNetworkInfo();
            if (null != info && info.isConnected()) {
                if (info.getState() == NetworkInfo.State.CONNECTED) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 是否有网络，需要加上访问网络状态的权限
     */
    public static boolean hasNetwork(Context context) {
        ConnectivityManager con = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo workinfo = con.getActiveNetworkInfo();
        if (workinfo == null || !workinfo.isAvailable()) {
            return false;
        }
        return true;
    }

    /**
     * 判断是否是WiFi网络
     */
    public static boolean isWifiNet(Context context) {
        ConnectivityManager con = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo workinfo = con.getActiveNetworkInfo();
        return workinfo != null
                && workinfo.getType() == ConnectivityManager.TYPE_WIFI;
    }

    /**
     * 打开网络设置界面
     */
    public static void openSetting(Activity activity) {
        //整体
        activity.startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));
        //WIFI:
        //activity.startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));
        //流量:
        //activity.startActivity(new Intent(android.provider.Settings.ACTION_DATA_ROAMING_SETTINGS));
    }

}

2.ToastUtils

public class ToastUtils {

    private ToastUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 短时间显示Toast
     */
    public static void showShort(Context context, CharSequence message) {
        Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
    }

    /**
     * 长时间显示Toast
     */
    public static void showLong(Context context, CharSequence message) {
        Toast.makeText(context, message, Toast.LENGTH_LONG).show();
    }

}

3.LogUtils

public class LogUtils { 

    private LogUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    } 

    private static boolean isDebug = false;  

    public static void i(String tag,String  msg){  
        if(isDebug){  
            Log.i(tag, msg);  
        }  
    }  

    public static void i(Object object,String  msg){  
        if(isDebug){  
            Log.i(object.getClass().getSimpleName(), msg);  
        }  
    }  

    public static void e(String tag,String  msg){  
        if(isDebug){  
            Log.e(tag, msg);  
        }  
    }  

    public static void e(Object object,String  msg){  
        if(isDebug){  
            Log.e(object.getClass().getSimpleName(), msg);  
        }  
    }  

}  

4.DensityUtils(android dp和px之间转换)

public class DensityUtils {  

    private DensityUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    }   

    /**  
     * 根据手机的分辨率从 dip 的单位 转成为 px(像素)  
     */    
    public static int qip2px(Context context, float dpValue) {    
        final float scale = context.getResources().getDisplayMetrics().density;    
        return (int) (dpValue * scale + 0 .5f);   
    }    

    /**  
     * 根据手机的分辨率从 px(像素) 的单位 转成为 dp  
     */    
    public static int px2dip(Context context, float pxValue) {    
        final float scale = context.getResources().getDisplayMetrics().density;    
        return (int) (pxValue / scale + 0.5f);    
    }    

}

5.JsonUtils

public class JsonUtils {  

    private JsonUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    } 

    /** 
     * 把一个map变成json字符串 
     * @param map 
     * @return 
     */  
    public static String parseMapToJson(Map<?, ?> map) {  
        try {  
            Gson gson = new Gson();  
            return gson.toJson(map);  
        } catch (Exception e) {  
        }  
        return null;  
    }  

    /** 
     * 把一个json字符串变成对象 
     * @param json 
     * @param cls 
     * @return 
     */  
    public static <T> T parseJsonToBean(String json, Class<T> cls) {  
        Gson gson = new Gson();  
        T t = null;  
        try {  
            t = gson.fromJson(json, cls);  
        } catch (Exception e) {  
        }  
        return t;  
    }  

    /** 
     * 把json字符串变成map 
     * @param json 
     * @return 
     */  
    public static HashMap<String, Object> parseJsonToMap(String json) {  
        Gson gson = new Gson();  
        Type type = new TypeToken<HashMap<String, Object>>() {  
        }.getType();  
        HashMap<String, Object> map = null;  
        try {  
            map = gson.fromJson(json, type);  
        } catch (Exception e) {  
        }  
        return map;  
    }  

    /** 
     * 把json字符串变成集合 
     * params: new TypeToken<List<yourbean>>(){}.getType(), 
     * @param json 
     * @param type  new TypeToken<List<yourbean>>(){}.getType() 
     * @return 
     */  
    public static List<?> parseJsonToList(String json, Type type) {  
        Gson gson = new Gson();  
        List<?> list = gson.fromJson(json, type);  
        return list;  
    }  

    /** 
     *  
     * 获取json串中某个字段的值，注意，只能获取同一层级的value
     * @param json 
     * @param key 
     * @return 
     */  
    public static String getFieldValue(String json, String key) {  
        if (TextUtils.isEmpty(json))  
            return null;  
        if (!json.contains(key))  
            return "";  
        JSONObject jsonObject = null;  
        String value = http://www.mamicode.com/null;  
        try {  
            jsonObject = new JSONObject(json);  
            value = http://www.mamicode.com/jsonObject.getString(key);  "hljs-keyword">catch (JSONException e) {  
            e.printStackTrace();  
        }  
        return value;  
    }  

}  

6.ViewUtils

public class ViewUtils {  

    private ViewUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    } 

    /**
     * 把自身从父View中移除
     */  
    public static void removeSelfFromParent(View view) {  
        if (view != null) {  
            ViewParent parent = view.getParent();  
            if (parent != null && parent instanceof ViewGroup) {  
                ViewGroup group = (ViewGroup) parent;  
                group.removeView(view);  
            }  
        }  
    }  

    /** 
     * 判断触点是否落在该View上 
     */  
    public static boolean isTouchInView(MotionEvent ev, View v) {  
        int[] vLoc = new int[2];  
        v.getLocationOnScreen(vLoc);  
        float motionX = ev.getRawX();  
        float motionY = ev.getRawY();  
        return motionX >= vLoc[0] && motionX <= (vLoc[0] + v.getWidth())  
                && motionY >= vLoc[1] && motionY <= (vLoc[1] + v.getHeight());  
    }  

}

7.GlideUtils（Glide框架相关）

/** 
 * 用Glide加载图片的时候根据图片尺寸让ImageView自适应 
 */
public class GlideUtils { 

    private GlideUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    } 

    public static void GlideLoadImage(ImageView view, String url, final int targetWidth) {  
        Glide.with(view.getContext())  
                .load(url)  
                .into(new ImageViewTarget<GlideDrawable>(view) {  
                    @Override  
                    protected void setResource(GlideDrawable resource) {  
                        ImageViewUtils.autoFit(view, targetWidth, resource.getIntrinsicWidth(), resource.getIntrinsicHeight());  
                        view.setImageDrawable(resource);  
                    }  
                });  
    }  

    public static void autoFit(ImageView imageView, int targetWidth, int photoWidth, int photoHeight) {  
        float ratio = (targetWidth + 0f) / photoWidth;  
        ViewGroup.LayoutParams params = imageView.getLayoutParams();  
        if (params == null) {  
            params = new ViewGroup.LayoutParams(targetWidth, (int) (photoHeight * ratio));  
        } else {  
            params.width = targetWidth;  
            params.height = (int) (photoHeight * ratio);  
        }  
        imageView.setLayoutParams(params);  
    }  

}

8.SPUtils

public class SPUtils {

    private SPUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    } 

    /**
     * 保存文件名
     */
    public static final String FILE_NAME = "config";

    /**
     * 保存数据的方法，根据类型调用不同的保存方法
     */
    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); //commit同步的，apply异步的
    }

    /**
     * 获取数据的方法，根据默认值得到数据的类型，然后调用对应方法获取值
     */
    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对应的值
     */
    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
     */
    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
     */
    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
     */
    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（适配）
     */
    private static class SharedPreferencesCompat {
        private static final Method sApplyMethod = findApplyMethod();

        /**
         * 反射查找apply的方法
         */
        @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
         */
        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();
        }
    }

}

9.SDCardUtils（SD卡相关）

public class SDCardUtils {

    private SDCardUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 判断SDCard是否可用
     */
    public static boolean isSDCardEnable() {
        return Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED);
    }

    /**
     * 获取SD卡路径
     */
    public static String getSDCardPath() {
        return Environment.getExternalStorageDirectory().getAbsolutePath()
                + File.separator;
    }

    /**
     * 获取SD卡的剩余容量(byte)
     */
    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(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
     */
    public static String getRootDirectoryPath() {
        return Environment.getRootDirectory().getAbsolutePath();
    }

}

10.ScreenUtils（屏幕相关）

public class ScreenUtils {

    private ScreenUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 获得屏幕高度
     */
    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
     */
    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
     */
    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
     */
    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
     */
    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;
    }

}

11.AppUtils（App相关辅助类）

public class AppUtils {

    private AppUtils() {
        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
     */
    public static String getVersionName(Context context) {
        try {
            PackageManager packageManager = context.getPackageManager();
            PackageInfo packageInfo = packageManager.getPackageInfo(
                    context.getPackageName(), 0);
            return packageInfo.versionName; //当前应用的版本名称
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

}

12.KeyBoardUtils（软键盘相关辅助类）

public class KeyBoardUtils {
    private KeyBoardUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    }
    /**
     * 切换软键盘的状态
     * 如当前为收起变为弹出,若当前为弹出变为收起
     */
    public static void toggleKeybord(EditText edittext) {
        InputMethodManager inputMethodManager = (InputMethodManager)
                edittext.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        inputMethodManager.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
    }
    /**
     * 强制隐藏输入法键盘
     */
    public static void hideKeybord(EditText edittext) {
        InputMethodManager inputMethodManager = (InputMethodManager)
                edittext.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        if (inputMethodManager.isActive()) {
            inputMethodManager.hideSoftInputFromWindow(edittext.getWindowToken(), 0);
        }
    }
    /**
     * 强制显示输入法键盘
     */
    public static void showKeybord(EditText edittext) {
        InputMethodManager inputMethodManager = (InputMethodManager)
                edittext.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        inputMethodManager.showSoftInput(edittext, InputMethodManager.SHOW_FORCED);
    }
    /**
     * 输入法是否显示
     */
    public static boolean isKeybord(EditText edittext) {
        boolean bool = false;
        InputMethodManager inputMethodManager = (InputMethodManager)
                edittext.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        if (inputMethodManager.isActive()) {
            bool = true;
        }
        return bool;
    }
}

13.HttpUtils（Http相关辅助类）

public class HttpUtils {

    private static final int TIMEOUT_IN_MILLIONS = 5000;

    public interface CallBack {
        void onRequestComplete(String result);
    }

    /**
     * 异步的Get请求
     * @param urlStr
     * @param callBack
     */
    public static void doGetAsyn(final String urlStr, final CallBack callBack) {
        new Thread() {
            public void run() {
                try {
                    String result = doGet(urlStr);
                    if (callBack != null) {
                        callBack.onRequestComplete(result);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            };
        }.start();
    }

    /**
     * 异步的Post请求
     * @param urlStr
     * @param params
     * @param callBack
     * @throws Exception
     */
    public static void doPostAsyn(final String urlStr, final String params,
            final CallBack callBack) throws Exception {
        new Thread() {
            public void run() {
                try {
                    String result = doPost(urlStr, params);
                    if (callBack != null) {
                        callBack.onRequestComplete(result);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            };
        }.start();
    }

    /**
     * Get请求，获得返回数据
     * @param urlStr
     * @return
     * @throws Exception
     */
    public static String doGet(String urlStr) {
        URL url = null;
        HttpURLConnection conn = null;
        InputStream is = null;
        ByteArrayOutputStream baos = null;
        try {
            url = new URL(urlStr);
            conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
            conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);
            conn.setRequestMethod("GET");
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            if (conn.getResponseCode() == 200) {
                is = conn.getInputStream();
                baos = new ByteArrayOutputStream();
                int len = -1;
                byte[] buf = new byte[128];

                while ((len = is.read(buf)) != -1) {
                    baos.write(buf, 0, len);
                }
                baos.flush();
                return baos.toString();
            } else {
                throw new RuntimeException(" responseCode is not 200 ... ");
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (is != null)
                    is.close();
            } catch (IOException e) {
            }
            try {
                if (baos != null)
                    baos.close();
            } catch (IOException e) {
            }
            conn.disconnect();
        }
        return null;
    }

    /**
     * 向指定 URL 发送POST方法的请求
     * @param url 发送请求的 URL
     * @param param 请求参数，形式:name1=value1&name2=value2 
     * @return 所代表远程资源的响应结果
     * @throws Exception
     */
    public static String doPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            HttpURLConnection conn = (HttpURLConnection) realUrl
                    .openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type",
                    "application/x-www-form-urlencoded");
            conn.setRequestProperty("charset", "utf-8");
            conn.setUseCaches(false);
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
            conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);
            if (param != null && !param.trim().equals("")) {
                // 获取URLConnection对象对应的输出流
                out = new PrintWriter(conn.getOutputStream());
                // 发送请求参数
                out.print(param);
                // flush输出流的缓冲
                out.flush();
            }
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        // 使用finally块来关闭输出流、输入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }

}

如果有更好的建议或者更好的Utils，请发私信或者留言。