package com.lqr.wechat.util; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.os.Environment; import android.text.TextUtils; import android.view.View; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.Random; import io.rong.imlib.model.UserInfo; /** * Created by AMing on 16/4/6. * Company RongCloud */ public class RongGenerate { // private static String SAVEADDRESS = "/data/data/cn.rongcloud.im/temp"; private static String SAVEADDRESS = UIUtils.getContext().getFilesDir().getPath();// /data/data/<application package>/files private static final String SCHEMA = "file://"; public static String generateDefaultAvatar(String username, String userid) { String s = null; if (!TextUtils.isEmpty(username)) { s = String.valueOf(username.charAt(0)); } if (s == null) { s = "A"; } String color = getColorRGB(userid); String string = getAllFirstLetter(username); createDir(SAVEADDRESS); File f = new File(SAVEADDRESS, string + "_" + userid); if (f.exists()) { return SCHEMA + f.getPath(); } Paint paint = new Paint(); paint.setColor(Color.WHITE); paint.setTextSize(220); paint.setAntiAlias(true); int width = 480; int height = 480; Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); canvas.drawColor(Color.parseColor(color)); Rect rect = new Rect(); paint.getTextBounds(s, 0, s.length(), rect); Paint.FontMetrics fm = paint.getFontMetrics(); int textLeft = (int) ((width - paint.measureText(s)) / 2); int textTop = (int) (height - width / 2 + Math.abs(fm.ascent) / 2 - 25); canvas.drawText(s, textLeft, textTop, paint); return saveBitmap(bitmap, string + "_" + userid); } public static String generateDefaultAvatar(UserInfo userInfo) { if (userInfo == null) return null; else return generateDefaultAvatar(userInfo.getName(), userInfo.getUserId()); } private static void createDir(String saveaddress) { boolean b; String status = Environment.getExternalStorageState(); b = status.equals(Environment.MEDIA_MOUNTED); if (b) { File destDir = new File(saveaddress); if (!destDir.exists()) { destDir.mkdirs(); } } } private static String saveBitmap(Bitmap bm, String imageUrlName) { File f = new File(SAVEADDRESS, imageUrlName); try { FileOutputStream out = new FileOutputStream(f); bm.compress(Bitmap.CompressFormat.JPEG, 100, out); out.flush(); out.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return SCHEMA + f.getPath(); } private static String getColorRGB(String userId) { String[] portraitColors = {"#e97ffb", "#00b8d4", "#82b2ff", "#f3db73", "#f0857c"}; if (TextUtils.isEmpty(userId)) { return portraitColors[0]; } int i = getAscii(userId.charAt(0)) % 5; return portraitColors[i]; } private static int getAscii(char cn) { byte[] bytes = (String.valueOf(cn)).getBytes(); if (bytes.length == 1) { //单字节字符 return bytes[0]; } else if (bytes.length == 2) { //双字节字符 int hightByte = 256 + bytes[0]; int lowByte = 256 + bytes[1]; int ascii = (256 * hightByte + lowByte) - 256 * 256; return ascii; } else { return 0; //错误 } } /** * 生成 view 的截图 * * @param view * @return */ public static Bitmap takeScreenShot(View view) { view.setDrawingCacheEnabled(true); view.buildDrawingCache(); return view.getDrawingCache(); } private final static int[] li_SecPosValue = {1601, 1637, 1833, 2078, 2274, 2302, 2433, 2594, 2787, 3106, 3212, 3472, 3635, 3722, 3730, 3858, 4027, 4086, 4390, 4558, 4684, 4925, 5249, 5590 }; private final static String[] lc_FirstLetter = {"a", "b", "c", "d", "e", "f", "g", "h", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "w", "x", "y", "z" }; /** * 取得给定汉字串的首字母串,即声母串 * * @param str 给定汉字串 * @return 声母串 */ private static String getAllFirstLetter(String str) { if (str == null || str.trim().length() == 0) { return ""; } String _str = ""; for (int i = 0; i < str.length(); i++) { _str = _str + getFirstLetter(str.substring(i, i + 1)); } return _str; } /** * 取得给定汉字的首字母,即声母 * * @param chinese 给定的汉字 * @return 给定汉字的声母 */ private static String getFirstLetter(String chinese) { if (chinese == null || chinese.trim().length() == 0) { return ""; } chinese = conversionStr(chinese, "GB2312", "ISO8859-1"); if (chinese.length() > 1) // 判断是不是汉字 { int li_SectorCode = (int) chinese.charAt(0); // 汉字区码 int li_PositionCode = (int) chinese.charAt(1); // 汉字位码 li_SectorCode = li_SectorCode - 160; li_PositionCode = li_PositionCode - 160; int li_SecPosCode = li_SectorCode * 100 + li_PositionCode; // 汉字区位码 if (li_SecPosCode > 1600 && li_SecPosCode < 5590) { for (int i = 0; i < 23; i++) { if (li_SecPosCode >= li_SecPosValue[i] && li_SecPosCode < li_SecPosValue[i + 1]) { chinese = lc_FirstLetter[i]; break; } } } else // 非汉字字符,如图形符号或ASCII码 { chinese = conversionStr(chinese, "ISO8859-1", "GB2312"); chinese = chinese.substring(0, 1); } } return chinese; } /** * 字符串编码转换 * * @param str 要转换编码的字符串 * @param charsetName 原来的编码 * @param toCharsetName 转换后的编码 * @return 经过编码转换后的字符串 */ private static String conversionStr(String str, String charsetName, String toCharsetName) { try { str = new String(str.getBytes(charsetName), toCharsetName); } catch (UnsupportedEncodingException ex) { System.out.println("字符串编码转换异常:" + ex.getMessage()); } return str; } private static String generateRandomCharacter() { final String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; final int length = alphabet.length(); Random random = new Random(); String randomChar = String.valueOf(alphabet.charAt(random.nextInt(length))); return randomChar; } }