常用Util类集合

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#android #编程习惯 #工具类

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常用工具类的集合

一.AppUtils.java---app相关信息类
二.DensityUtils.java---单位转换类
三.网络处理类框架大多都有封装，根据不同的框架自行选择
四.KeyBoardUtils.java---开关软键盘类
五.LogCatUtils.java---LogCat封装类
六.ScreenUtils.java---获得屏幕参数类
七.NetUtils.java---网络相关类
八.SDCardUtils.java--SD卡相关类
九.ToastUtils.java-Toast封装类
十.SharedPreferencesUtils---sp封装类

代码如下：

1.Apputils.java

public class AppUtils {

    //应用名称
    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 (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

    //当前版本名称
    public static String getVersionName(Context context) {
        try {
            PackageManager packageManager = context.getPackageManager();
            PackageInfo packageInfo = packageManager.getPackageInfo(
                    context.getPackageName(), 0);
            return packageInfo.versionName;

        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }


}

2.DensityUtils.java

public class DensityUtils {

    //dp转px
    public static int dp2px(Context context, float dpVal) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                dpVal, context.getResources().getDisplayMetrics());
    }

    //sp转px
    public static int sp2px(Context context, float spVal) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
                spVal, context.getResources().getDisplayMetrics());
    }

    //px转dp
    public static float px2dp(Context context, float pxVal) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (pxVal / scale);
    }


    //px转sp
    public static float px2sp(Context context, float pxVal) {
        return (pxVal / context.getResources().getDisplayMetrics().scaledDensity);
    }
}

4.KeyBoardUtils.java

public class KeyBoardUtils {

    //打开软键盘
    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
    public static void closeKeybord(EditText mEditText, Context mContext) {
        InputMethodManager imm = (InputMethodManager) mContext.getSystemService(Context.INPUT_METHOD_SERVICE);

        imm.hideSoftInputFromWindow(mEditText.getWindowToken(), 0);
    }
}

5.LogCatUtils.java

public class LogCatUtils {


    //默认打印调试信息
    public static boolean isDebug = true;

    private static final String TAG = "QB_TEST";

    // 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参数的函数
    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);
    }
}

6.ScreenUtils.java

public class ScreenUtils {

    //获得屏幕宽度（px)
    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;
    }

    //获得屏幕高度（px)
    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;
    }

    //获得状态栏高度（px)
    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;
    }

    //获得屏幕截图（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;

    }

    //获得屏幕截图（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;

    }

}

7.NetUtils.java

public class NetUtils {

    //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;
    }

    //判断wifi是否连接
    public static boolean isWifi(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);

        if (cm == null)
            return false;
        return cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;

    }

    //打开网络界面
    public static void openSetting(Activity activity) {
        Intent intent = new Intent("/");
        ComponentName cm = new ComponentName("com.android.settings",
                "com.android.settings.WirelessSettings");
        intent.setComponent(cm);
        intent.setAction("android.intent.action.VIEW");
        activity.startActivityForResult(intent, 0);
    }
}

8.SDCardUtils.java

public class SDCardUtils {

    //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;//末尾加分隔符
    }

    //获取sd卡剩余容量
    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;
    }

    //获取系统存储路径
    public static String getRootDirectoryPath() {
        return Environment.getRootDirectory().getAbsolutePath();
    }

}

9.ToastUtils.java

public class ToastUtils {

    public static boolean isShow = true;
    public static boolean isLong = true;

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

    public static void showShort(Context context, int message) {
        if (isShow)
            Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
    }

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


    public static void showLong(Context context, int message) {
        if (isLong)
            Toast.makeText(context, message, Toast.LENGTH_LONG).show();
    }

    //自定义显示时间
    public static void show(Context context, CharSequence message, int duration) {
        if (isShow)
            Toast.makeText(context, message, duration).show();
    }


    public static void show(Context context, int message, int duration) {
        if (isShow)
            Toast.makeText(context, message, duration).show();
    }

}

10.SharedPreferencesUtils.java

public class SharedPreferencesUtils {

    // 保存在手机里面的文件名常量
    public static final String FILE_NAME = "share_data";

    //根据存入数据的类型调用相应方法
    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);
    }

    //根据参数类型取出数据
    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;
    }

    //根据Key移除数据
    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
    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);
    }

    //判断Key是否存在
    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
    public static Map<String, ?> getAll(Context context) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);
        return sp.getAll();
    }

    //简单判断apply与commit使用类
    private static class SharedPreferencesCompat {
        private static final Method sApplyMethod = findApplyMethod();

        //通过反射查找apply方法
        @SuppressWarnings({"unchecked", "rawtypes"})
        private static Method findApplyMethod() {
            try {
                Class clz = SharedPreferences.Editor.class;
                return clz.getMethod("apply");
            } catch (NoSuchMethodException e) {
            }

            return null;
        }

        //若反射找到则执行apply，反之提交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();
        }
    }


}