/*
ShengDao Android Client, CommonUtils
Copyright (c) 2014 ShengDao Tech Company Limited
*/
package cn.rongcloud.im.server.utils;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Environment;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.view.inputmethod.InputMethodManager;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import java.util.Properties;
/**
* [公共工具类，与Android API相关的辅助类]
*
* @author devin.hu
* @version 1.0
* @date 2013-9-30
*
**/
public class CommonUtils {
@SuppressWarnings("unused")
private static final String tag = CommonUtils.class.getSimpleName();
/** 网络类型 **/
public static final int NETTYPE_WIFI = 0x01;
public static final int NETTYPE_CMWAP = 0x02;
public static final int NETTYPE_CMNET = 0x03;
/**
* 根据key获取config.properties里面的值
* @param context
* @param key
* @return
*/
public static String getProperty(Context context, String key) {
try {
Properties props = new Properties();
InputStream input = context.getAssets().open("config.properties");
if (input != null) {
props.load(input);
return props.getProperty(key);
}
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
/**
* 检测网络是否可用
*
* @return
*/
public static boolean isNetworkConnected(Context context) {
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo ni = cm.getActiveNetworkInfo();
return ni != null && ni.isConnectedOrConnecting();
}
/**
* 获取当前网络类型
*
* @return 0：没有网络 1：WIFI网络 2：WAP网络 3：NET网络
*/
public static int getNetworkType(Context context) {
int netType = 0;
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
if (networkInfo == null) {
return netType;
}
int nType = networkInfo.getType();
if (nType == ConnectivityManager.TYPE_MOBILE) {
String extraInfo = networkInfo.getExtraInfo();
if (!TextUtils.isEmpty(extraInfo)) {
if (extraInfo.toLowerCase(Locale.getDefault()).equals("cmnet")) {
netType = NETTYPE_CMNET;
} else {
netType = NETTYPE_CMWAP;
}
}
} else if (nType == ConnectivityManager.TYPE_WIFI) {
netType = NETTYPE_WIFI;
}
return netType;
}
/**
* 判断SDCard是否存在,并可写
*
* @return
*/
public static boolean checkSDCard() {
String flag = Environment.getExternalStorageState();
return Environment.MEDIA_MOUNTED.equals(flag);
}
/**
* 获取屏幕宽度
* @param context
* @return
*/
public static int getScreenWidth(Context context) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
return dm.widthPixels;
}
/**
* 获取屏幕高度
* @param context
* @return
*/
public static int getScreenHeight(Context context) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
return dm.heightPixels;
}
/**
* 获取屏幕显示信息对象
* @param context
* @return
*/
public static DisplayMetrics getDisplayMetrics(Context context) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
return dm;
}
/**
* dp转pixel
*/
public static float dpToPixel(float dp, Context context) {
Resources resources = context.getResources();
DisplayMetrics metrics = resources.getDisplayMetrics();
return dp * (metrics.densityDpi / 160f);
}
/**
* pixel转dp
*/
public static float pixelsToDp(float px, Context context) {
Resources resources = context.getResources();
DisplayMetrics metrics = resources.getDisplayMetrics();
return px / (metrics.densityDpi / 160f);
}
/**
* 生成二维码图片
* @param str
* @return
*/
// public static Bitmap create2DCode(String str) {
// try {
// // 生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
// BitMatrix matrix = new MultiFormatWriter().encode(str, BarcodeFormat.QR_CODE, 300, 300);
// int width = matrix.getWidth();
// int height = matrix.getHeight();
//
// // 二维矩阵转为一维像素数组,也就是一直横着排了
// int[] pixels = new int[width * height];
// for (int y = 0; y < height; y++) {
// for (int x = 0; x < width; x++) {
// if (matrix.get(x, y)) {
// pixels[y * width + x] = 0xff000000;
// }
// }
// }
//
// Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
// // 通过像素数组生成bitmap,具体参考api
// bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
// return bitmap;
// } catch (WriterException e) {
// e.printStackTrace();
// }
// return null;
// }
/**
* 短信分享
*
* @param mContext
* @param smstext 短信分享内容
* @return
*/
public static Boolean sendSms(Context mContext, String smstext) {
Uri smsToUri = Uri.parse("smsto:");
Intent mIntent = new Intent(Intent.ACTION_SENDTO, smsToUri);
mIntent.putExtra("sms_body", smstext);
mContext.startActivity(mIntent);
return null;
}
/**
* 邮件分享
*
* @param mContext
* @param title 邮件的标题
* @param text 邮件的内容
* @return
*/
public static void sendMail(Context mContext, String title, String text) {
// 调用系统发邮件
Intent emailIntent = new Intent(Intent.ACTION_SEND);
// 设置文本格式
emailIntent.setType("text/plain");
// 设置对方邮件地址
emailIntent.putExtra(Intent.EXTRA_EMAIL, "");
// 设置标题内容
emailIntent.putExtra(Intent.EXTRA_SUBJECT, title);
// 设置邮件文本内容
emailIntent.putExtra(Intent.EXTRA_TEXT, text);
mContext.startActivity(Intent.createChooser(emailIntent, "Choose Email Client"));
}
/**
* 隐藏软键盘
* @param activity
*/
public static void hideKeyboard(Activity activity) {
if (activity != null) {
InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm.isActive()) {
imm.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), 0);
}
}
}
/**
* 显示软键盘
* @param activity
*/
public static void showKeyboard(Activity activity) {
if (activity != null) {
InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
if (!imm.isActive()) {
imm.showSoftInputFromInputMethod(activity.getCurrentFocus().getWindowToken(), 0);
}
}
}
/**
* 是否横屏
* @param context
* @return true为横屏，false为竖屏
*/
public static boolean isLandscape(Context context) {
return context.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;
}
/**
* 判断是否是平板
* 这个方法是从 Google I/O App for Android 的源码里找来的，非常准确。
* @param context
* @return
*/
public static boolean isTablet(Context context) {
return (context.getResources().getConfiguration().screenLayout
& Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE;
}
}