package cn.rongcloud.im.server.utils;
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 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;
}
}