JUtils.java

package com.example.administrator.searchpicturetool.widght.imageLoader;

/**
 * Created by Administrator on 2016/4/26 0026.
 */
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningTaskInfo;
import android.app.Application;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.util.Base64;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.TypedValue;
import android.view.View;
import android.view.inputmethod.InputMethodManager;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.List;

/**
 * 一些小工具集合，包括获取屏幕宽高等
 */
public class JUtils {
    public static String TAG;
    public static boolean DEBUG = false;
    private static Context mApplicationContent;

    public static void initialize(Application app){
        mApplicationContent = app.getApplicationContext();
    }


    public static void setDebug(boolean isDebug,String TAG){
        JUtils.TAG = TAG;
        JUtils.DEBUG = isDebug;
    }



    public static void Log(String TAG,String text){
        if(DEBUG){
            Log.i(TAG, text);
        }
    }

    public static void Log(String text){
        if(DEBUG){
            Log.i(TAG, text);
        }
    }


    public static void Toast(String text){
        android.widget.Toast.makeText(mApplicationContent, text, android.widget.Toast.LENGTH_SHORT).show();
    }

    public static void ToastLong(String text){
        android.widget.Toast.makeText(mApplicationContent, text, android.widget.Toast.LENGTH_LONG).show();
    }


    /**
     * dp转px
     *
     */
    public static int dip2px(float dpValue) {
        final float scale = mApplicationContent.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }


    /**
     *	px转dp
     */
    public static int px2dip(float pxValue) {
        final float scale = mApplicationContent.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }


    /**
     * 取屏幕宽度
     * @return
     */
    public static int getScreenWidth(){
        DisplayMetrics dm = mApplicationContent.getResources().getDisplayMetrics();
        return dm.widthPixels;
    }

    /**
     * 取屏幕高度
     * @return
     */
    public static int getScreenHeight(){
        DisplayMetrics dm = mApplicationContent.getResources().getDisplayMetrics();
        return dm.heightPixels-getStatusBarHeight();
    }

    /**
     * 取屏幕高度包含状态栏高度
     * @return
     */
    public static int getScreenHeightWithStatusBar(){
        DisplayMetrics dm = mApplicationContent.getResources().getDisplayMetrics();
        return dm.heightPixels;
    }

    /**
     * 取导航栏高度
     * @return
     */
    public static int getNavigationBarHeight() {
        int result = 0;
        int resourceId = mApplicationContent.getResources().getIdentifier("navigation_bar_height", "dimen", "android");
        if (resourceId > 0) {
            result = mApplicationContent.getResources().getDimensionPixelSize(resourceId);
        }
        return result;
    }


    /**
     * 取状态栏高度
     * @return
     */
    public static int getStatusBarHeight() {
        int result = 0;
        int resourceId = mApplicationContent.getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            result = mApplicationContent.getResources().getDimensionPixelSize(resourceId);
        }
        return result;
    }

    public static int getActionBarHeight() {
        int actionBarHeight = 0;

        final TypedValue tv = new TypedValue();
        if (mApplicationContent.getTheme()
                .resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
            actionBarHeight = TypedValue.complexToDimensionPixelSize(
                    tv.data, mApplicationContent.getResources().getDisplayMetrics());
        }
        return actionBarHeight;
    }


    /**
     * 关闭输入法
     * @param act
     */
    public static void closeInputMethod(Activity act){
        View view = act.getCurrentFocus();
        if(view!=null){
            ((InputMethodManager)mApplicationContent.getSystemService(Context.INPUT_METHOD_SERVICE)).
                    hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }


    /**
     * 判断应用是否处于后台状态
     * @return
     */
    public static boolean isBackground() {
        ActivityManager am = (ActivityManager) mApplicationContent.getSystemService(Context.ACTIVITY_SERVICE);
        List<RunningTaskInfo> tasks = am.getRunningTasks(1);
        if (!tasks.isEmpty()) {
            ComponentName topActivity = tasks.get(0).topActivity;
            if (!topActivity.getPackageName().equals(mApplicationContent.getPackageName())) {
                return true;
            }
        }
        return false;
    }

    /**
     * 复制文本到剪贴板
     * @param text
     */
    public static void copyToClipboard(String text){
        ClipboardManager cbm = (ClipboardManager) mApplicationContent.getSystemService(Activity.CLIPBOARD_SERVICE);
        cbm.setPrimaryClip(ClipData.newPlainText(mApplicationContent.getPackageName(), text));
    }

    /**
     * 获取SharedPreferences
     * @return SharedPreferences
     */
    public static SharedPreferences getSharedPreference() {
        return mApplicationContent.getSharedPreferences(mApplicationContent.getPackageName(), Activity.MODE_PRIVATE);
    }

    /**
     * 获取SharedPreferences
     * @return SharedPreferences
     */
    public static SharedPreferences getSharedPreference(String name) {
        return mApplicationContent.getSharedPreferences(name, Activity.MODE_PRIVATE);
    }

    /**
     * 获取SharedPreferences
     * @return SharedPreferences
     */
    public static SharedPreferences getSharedPreference(String name,int mode) {
        return mApplicationContent.getSharedPreferences(name, mode);
    }

    /**
     * 经纬度测距
     * @param jingdu1
     * @param weidu1
     * @param jingdu2
     * @param weidu2
     * @return
     */
    public static double distance(double jingdu1, double weidu1, double jingdu2,   double weidu2) {
        double a, b, R;
        R = 6378137; // 地球半径
        weidu1 = weidu1 * Math.PI / 180.0;
        weidu2 = weidu2 * Math.PI / 180.0;
        a = weidu1 - weidu2;
        b = (jingdu1 - jingdu2) * Math.PI / 180.0;
        double d;
        double sa2, sb2;
        sa2 = Math.sin(a / 2.0);
        sb2 = Math.sin(b / 2.0);
        d = 2
                * R
                * Math.asin(Math.sqrt(sa2 * sa2 + Math.cos(weidu1)
                * Math.cos(weidu2) * sb2 * sb2));
        return d;
    }

    /**
     * 是否有网络
     * @return
     */
    public static boolean isNetWorkAvilable() {
        ConnectivityManager connectivityManager = (ConnectivityManager) mApplicationContent
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
        if (activeNetInfo == null || !activeNetInfo.isAvailable()) {
            return false;
        } else {
            return true;
        }
    }

    /**
     * 取APP版本号
     * @return
     */
    public static int getAppVersionCode(){
        try {
            PackageManager mPackageManager = mApplicationContent.getPackageManager();
            PackageInfo _info = mPackageManager.getPackageInfo(mApplicationContent.getPackageName(),0);
            return _info.versionCode;
        } catch (NameNotFoundException e) {
            return 0;
        }
    }

    /**
     * 取APP版本名
     * @return
     */
    public static String getAppVersionName(){
        try {
            PackageManager mPackageManager = mApplicationContent.getPackageManager();
            PackageInfo _info = mPackageManager.getPackageInfo(mApplicationContent.getPackageName(),0);
            return _info.versionName;
        } catch (NameNotFoundException e) {
            return null;
        }
    }

    public static Bitmap BitmapZoom(Bitmap b, float x, float y)
    {
        int w=b.getWidth();
        int h=b.getHeight();
        float sx=x/w;
        float sy=y/h;
        Matrix matrix = new Matrix();
        matrix.postScale(sx, sy);
        Bitmap resizeBmp = Bitmap.createBitmap(b, 0, 0, w,
                h, matrix, true);
        return resizeBmp;
    }


    public static String MD5(byte[] data) {
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        md5.update(data);
        byte[] m = md5.digest();//加密
        return Base64.encodeToString(m, Base64.DEFAULT);
    }

    public static String getStringFromAssets(String fileName){
        try {
            InputStreamReader inputReader = new InputStreamReader(mApplicationContent.getResources().getAssets().open(fileName) );
            BufferedReader bufReader = new BufferedReader(inputReader);
            String line="";
            String Result="";
            while((line = bufReader.readLine()) != null)
                Result += line;
            return Result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }

    public static Uri getUriFromRes(int id){
        return Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://"
                + mApplicationContent.getResources().getResourcePackageName(id) + "/"
                + mApplicationContent.getResources().getResourceTypeName(id) + "/"
                + mApplicationContent.getResources().getResourceEntryName(id));
    }

    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            URLConnection conn = realUrl.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            out = new PrintWriter(conn.getOutputStream());
            out.print(param);
            out.flush();
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }
}