使用TextView从右到左的Android设置

时间:2014-05-13 10:04:45

标签: android textview right-to-left

我需要在Android TextView中设置一个与阿拉伯字母组合的文本,在中间我有123.doc

在strings.xml中:

<string name="message">حفظ باسم  1% وإرسال</string>

(翻译为“另存为123.doc并发送”)

然后在代码中:

String string = getString(R.string.message);
String message = string.replace("%1", "123.doc");

输出错误:
حفظباسمdoc.123وإرسال
(应该是123.doc)

我尝试过设置文字重力,文字对齐以及此处建议的内容:Android setting with TextView for Hebrew text? 没有帮助......

有人可以帮忙吗? Thanx这么多!

更新:
这是我的代码的图像,由Farhad Faghihi的回答和输出建议(不要介意字符串的含义,我刚刚添加了一个随机字进行测试): enter image description here

2 个答案:

答案 0 :(得分:2)

所以我终于找到了正确的方法!如果有人想知道,这是怎么回事(这很简单,我以前没有人相信过):

String filename = 123.doc
String message = s1 + "\u202A" + fileName + "\u202C" + s2;

其中s1和s2是RtL语言中的字符串。

答案 1 :(得分:0)

您可以使用库来重新格式化非拉丁语言的文本。

你可能想看一下&#34; Better Arabic Resharper&#34;在github上。

而且,由于我有关于显示阿拉伯语和波斯语文本(共有29个字母AFAIK)的项目,我使用了一个非常方便的名为Farsi.java的库。

这个类有两个主要方法:

1-转换(字符串) - 重新格式化阿拉伯语/波斯语的纯文本

2- ConvertBackToRealFarsi(string) - 重新格式化与标点符号,数字,英文字母等组合的阿拉伯语/波斯语纯文本。

由于阿拉伯语的字母数字少于波斯语,因此您可以顺利使用此库。

代码:

package com.example.fasri;

import android.content.Context;
import android.graphics.Typeface;

public final class Farsi {

public static boolean isFarsiConversionNeeded = true;

private final static String szLamAndAlef = Character
        .toString((char) 0xfedf)
        + Character.toString((char) 0xfe8e); // Lam + Alef

private final static String szLamStickAndAlef = Character
        .toString((char) 0xfee0)
        + Character.toString((char) 0xfe8e); // Lam (Sticky !!!)+
                                                // Alef

private final static String szLa = Character.toString((char) 0xfefb); // La
private final static String szLaStick = Character.toString((char) 0xfefc); // La
                                                                            // (Sticky!!!)

private final static String szLamAndAlefWoosim = Character
        .toString((char) 0xe1)
        + Character.toString((char) 0xbb); // Lam + Alef

private final static String szLamStickAndAlefWoosim = Character
        .toString((char) 0x90)
        + Character.toString((char) 0xbb); // Lam (Sticky !!!)+
                                            // Alef

private final static String szLaWoosim = Character.toString((char) 0xd9); // La
private final static String szLaStickWoosim = Character
        .toString((char) 0xd9); // La

// (Sticky!!!)

private static final class struc {
    public char character;
    public char endGlyph;
    public char iniGlyph;
    public char midGlyph;
    public char isoGlyph;

    public struc(char Character, char EndGlyph, char IniGlyph,
            char MidGlyph, char IsoGlyph) {
        character = Character;
        endGlyph = EndGlyph;
        iniGlyph = IniGlyph;
        midGlyph = MidGlyph;
        isoGlyph = IsoGlyph;
    }
}

static struc[] arrStruc = {
        new struc((char) 0x630, (char) 0xfeac, (char) 0xfeab,
                (char) 0xfeac, (char) 0xfeab),
        new struc((char) 0x62f, (char) 0xfeaa, (char) 0xfea9,
                (char) 0xfeaa, (char) 0xfea9),
        new struc((char) 0x62c, (char) 0xfe9e, (char) 0xfe9f,
                (char) 0xfea0, (char) 0xfe9d),
        new struc((char) 0x62d, (char) 0xfea2, (char) 0xfea3,
                (char) 0xfea4, (char) 0xfea1),
        new struc((char) 0x62e, (char) 0xfea6, (char) 0xfea7,
                (char) 0xfea8, (char) 0xfea5),
        new struc((char) 0x647, (char) 0xfeea, (char) 0xfeeb,
                (char) 0xfeec, (char) 0xfee9),
        new struc((char) 0x639, (char) 0xfeca, (char) 0xfecb,
                (char) 0xfecc, (char) 0xfec9),
        new struc((char) 0x63a, (char) 0xfece, (char) 0xfecf,
                (char) 0xfed0, (char) 0xfecd),
        new struc((char) 0x641, (char) 0xfed2, (char) 0xfed3,
                (char) 0xfed4, (char) 0xfed1),
        new struc((char) 0x642, (char) 0xfed6, (char) 0xfed7,
                (char) 0xfed8, (char) 0xfed5),
        new struc((char) 0x62b, (char) 0xfe9a, (char) 0xfe9b,
                (char) 0xfe9c, (char) 0xfe99),
        new struc((char) 0x635, (char) 0xfeba, (char) 0xfebb,
                (char) 0xfebc, (char) 0xfeb9),
        new struc((char) 0x636, (char) 0xfebe, (char) 0xfebf,
                (char) 0xfec0, (char) 0xfebd),
        new struc((char) 0x637, (char) 0xfec2, (char) 0xfec3,
                (char) 0xfec4, (char) 0xfec1),
        new struc((char) 0x643, (char) 0xfeda, (char) 0xfedb,
                (char) 0xfedc, (char) 0xfed9),
        new struc((char) 0x645, (char) 0xfee2, (char) 0xfee3,
                (char) 0xfee4, (char) 0xfee1),
        new struc((char) 0x646, (char) 0xfee6, (char) 0xfee7,
                (char) 0xfee8, (char) 0xfee5),
        new struc((char) 0x62a, (char) 0xfe96, (char) 0xfe97,
                (char) 0xfe98, (char) 0xfe95),
        new struc((char) 0x627, (char) 0xfe8e, (char) 0xfe8d,
                (char) 0xfe8e, (char) 0xfe8d),
        new struc((char) 0x644, (char) 0xfede, (char) 0xfedf,
                (char) 0xfee0, (char) 0xfedd),
        new struc((char) 0x628, (char) 0xfe90, (char) 0xfe91,
                (char) 0xfe92, (char) 0xfe8f),
        new struc((char) 0x64a, (char) 0xfef2, (char) 0xfef3,
                (char) 0xfef4, (char) 0xfef1),
        new struc((char) 0x633, (char) 0xfeb2, (char) 0xfeb3,
                (char) 0xfeb4, (char) 0xfeb1),
        new struc((char) 0x634, (char) 0xfeb6, (char) 0xfeb7,
                (char) 0xfeb8, (char) 0xfeb5),
        new struc((char) 0x638, (char) 0xfec6, (char) 0xfec7,
                (char) 0xfec8, (char) 0xfec5),
        new struc((char) 0x632, (char) 0xfeb0, (char) 0xfeaf,
                (char) 0xfeb0, (char) 0xfeaf),
        new struc((char) 0x648, (char) 0xfeee, (char) 0xfeed,
                (char) 0xfeee, (char) 0xfeed),
        new struc((char) 0x629, (char) 0xfe94, (char) 0xfe93,
                (char) 0xfe93, (char) 0xfe93),
        new struc((char) 0x649, (char) 0xfef0, (char) 0xfeef,
                (char) 0xfef0, (char) 0xfeef),
        new struc((char) 0x631, (char) 0xfeae, (char) 0xfead,
                (char) 0xfeae, (char) 0xfead),
        new struc((char) 0x624, (char) 0xfe86, (char) 0xfe85,
                (char) 0xfe86, (char) 0xfe85),
        new struc((char) 0x621, (char) 0xfe80, (char) 0xfe80,
                (char) 0xfe80, (char) 0xfe80),
        new struc((char) 0x626, (char) 0xfe8a, (char) 0xfe8b,
                (char) 0xfe8c, (char) 0xfe89),
        new struc((char) 0x623, (char) 0xfe84, (char) 0xfe83,
                (char) 0xfe84, (char) 0xfe83),
        new struc((char) 0x622, (char) 0xfe82, (char) 0xfe81,
                (char) 0xfe82, (char) 0xfe81),
        new struc((char) 0x625, (char) 0xfe88, (char) 0xfe87,
                (char) 0xfe88, (char) 0xfe87),
        new struc((char) 0x67e, (char) 0xfb57, (char) 0xfb58,
                (char) 0xfb59, (char) 0xfb56), // peh
        new struc((char) 0x686, (char) 0xfb7b, (char) 0xfb7c,
                (char) 0xfb7d, (char) 0xfb7a), // cheh
        new struc((char) 0x698, (char) 0xfb8b, (char) 0xfb8a,
                (char) 0xfb8b, (char) 0xfb8a), // jeh
        new struc((char) 0x6a9, (char) 0xfb8f, (char) 0xfb90,
                (char) 0xfb91, (char) 0xfb8e), // keheh
        new struc((char) 0x6af, (char) 0xfb93, (char) 0xfb94,
                (char) 0xfb95, (char) 0xfb92), // gaf
        // new struc((char) 0x6cc, (char) 0xfbfd, (char) 0xfbfe,
        // (char) 0xfbff, (char) 0xfbfc), // Farsi yeh
        new struc((char) 0x6cc, (char) 0xfbfd, (char) 0xfef3,
                (char) 0xfef4, (char) 0xfbfc), // Arabic yeh
        new struc((char) 0x6c0, (char) 0xfba5, (char) 0xfba4,
                (char) 0xfba5, (char) 0xfba4) // heh with yeh
};

static struc[] arrStrucWoosim = {
        new struc((char) 0x630, (char) 0xb5, (char) 0x82, (char) 0xb5,
                (char) 0x82),
        new struc((char) 0x62f, (char) 0xb4, (char) 0x81, (char) 0xb4,
                (char) 0x81),
        new struc((char) 0x62c, (char) 0x9b, (char) 0xb1, (char) 0xf9,
                (char) 0xbf),
        new struc((char) 0x62d, (char) 0x9c, (char) 0xb2, (char) 0xfa,
                (char) 0xc0),
        new struc((char) 0x62e, (char) 0x9d, (char) 0xb3, (char) 0xfe,
                (char) 0xc1),
        new struc((char) 0x647, (char) 0xac, (char) 0xe4, (char) 0x93,
                (char) 0xd5),
        new struc((char) 0x639, (char) 0xc9, (char) 0xd3, (char) 0x8b,
                (char) 0xa4),
        new struc((char) 0x63a, (char) 0xca, (char) 0xdd, (char) 0x8c,
                (char) 0xa5),
        new struc((char) 0x641, (char) 0xa6, (char) 0xde, (char) 0x8d,
                (char) 0xcc),
        new struc((char) 0x642, (char) 0xa7, (char) 0xdf, (char) 0x8e,
                (char) 0xce),
        new struc((char) 0x62b, (char) 0xbd, (char) 0xaf, (char) 0xea,
                (char) 0x99),
        new struc((char) 0x635, (char) 0xc4, (char) 0xc8, (char) 0x87,
                (char) 0xa0),
        new struc((char) 0x636, (char) 0xc5, (char) 0xcb, (char) 0x88,
                (char) 0xa1),
        new struc((char) 0x637, (char) 0xc6, (char) 0xcd, (char) 0xcd,
                (char) 0xa2),
        new struc((char) 0x643, (char) 0xcf, (char) 0xe0, (char) 0x8f,
                (char) 0xa8),
        new struc((char) 0x645, (char) 0xd2, (char) 0xe2, (char) 0x91,
                (char) 0xaa),
        new struc((char) 0x646, (char) 0xd4, (char) 0xe3, (char) 0x92,
                (char) 0xab),
        new struc((char) 0x62a, (char) 0xbd, (char) 0xaf, (char) 0xea,
                (char) 0x99),
        new struc((char) 0x627, (char) 0xbb, (char) 0x80, (char) 0xbb,
                (char) 0x80),
        new struc((char) 0x644, (char) 0xd1, (char) 0xe1, (char) 0x90,
                (char) 0xa9),
        new struc((char) 0x628, (char) 0xbc, (char) 0xae, (char) 0xe9,
                (char) 0x98),
        new struc((char) 0x64a, (char) 0xdc, (char) 0xe6, (char) 0x95,
                (char) 0xdc),
        new struc((char) 0x633, (char) 0xc2, (char) 0xb8, (char) 0xb8,
                (char) 0x9e),
        new struc((char) 0x634, (char) 0xc3, (char) 0xb9, (char) 0xb9,
                (char) 0x9f),
        new struc((char) 0x638, (char) 0xc7, (char) 0xcd, (char) 0xcd,
                (char) 0xc7),
        new struc((char) 0x632, (char) 0xb7, (char) 0xb7, (char) 0xb7,
                (char) 0xb7),
        new struc((char) 0x648, (char) 0x94, (char) 0x94, (char) 0x94,
                (char) 0x94),
        new struc((char) 0x629, (char) 0xda, (char) 0xda, (char) 0xda,
                (char) 0xda),
        new struc((char) 0x649, (char) 0xdc, (char) 0xe6, (char) 0x95,
                (char) 0xdc),
        new struc((char) 0x631, (char) 0xb6, (char) 0xb6, (char) 0xb6,
                (char) 0xb6),
        new struc((char) 0x624, (char) 0xe7, (char) 0xe7, (char) 0xe7,
                (char) 0xe7),
        new struc((char) 0x621, (char) 0xba, (char) 0xba, (char) 0xba,
                (char) 0xba),
        new struc((char) 0x626, (char) 0xd7, (char) 0xe8, (char) 0x97,
                (char) 0xd7),
        new struc((char) 0x623, (char) 0x80, (char) 0x80, (char) 0x80,
                (char) 0x80),
        new struc((char) 0x622, (char) 0x80, (char) 0x80, (char) 0x80,
                (char) 0x80),
        new struc((char) 0x625, (char) 0x80, (char) 0x80, (char) 0x80,
                (char) 0x80),
        new struc((char) 0x67e, (char) 0xbc, (char) 0xae, (char) 0xe9,
                (char) 0x98), // peh
        new struc((char) 0x686, (char) 0x9b, (char) 0xb1, (char) 0xf9,
                (char) 0xbf), // cheh
        new struc((char) 0x698, (char) 0xb7, (char) 0xb7, (char) 0xb7,
                (char) 0xb7), // jeh
        new struc((char) 0x6a9, (char) 0xcf, (char) 0xe0, (char) 0x8f,
                (char) 0xa8), // keheh
        new struc((char) 0x6af, (char) 0xcf, (char) 0xe0, (char) 0x8f,
                (char) 0xa8), // gaf
        new struc((char) 0x6cc, (char) 0xdc, (char) 0xe6, (char) 0x95,
                (char) 0xdc), // yeh
        new struc((char) 0x6c0, (char) 0xac, (char) 0xe4, (char) 0x93,
                (char) 0xd5) // heh with yeh
};

private static final int N_DISTINCT_CHARACTERS = 43;

private static final String ArabicReverse(String s) {
    try {
        String Out = "", rev;
        s = MakeReverse(s);
        char[] chs = new char[s.length()];
        chs = s.toCharArray();
        int i = 0;
        while (i < s.length()) {
            if ((chs[i] >= '0' && chs[i] <= '9')) // isDigit(s[i]) ?
            {
                rev = "";
                while (i < s.length()
                        && ((chs[i] >= '0' && chs[i] <= '9') || chs[i] == '/')) // isDigit(s[i])
                                                                                // ?
                {
                    rev = rev + chs[i];
                    ++i;
                }
                rev = MakeReverse(rev);
                Out = Out + rev;
            } else {
                Out = Out + chs[i];
                ++i;
            }
        }
        s = Out;
    } catch (Exception ex) {
        // throw new Exception(
        // "An exception has occurred in ArabicReverse function.\\n"
        // + ex.getMessage());
    }
    return s;
}

private static final boolean isFromTheSet1(/* WCHAR */char ch) {
    char[] theSet1 = new char[] { (char) 0x62c, (char) 0x62d, (char) 0x62e,
            (char) 0x647, (char) 0x639, (char) 0x63a, (char) 0x641,
            (char) 0x642, (char) 0x62b, (char) 0x635, (char) 0x636,
            (char) 0x637, (char) 0x643, (char) 0x645, (char) 0x646,
            (char) 0x62a, (char) 0x644, (char) 0x628, (char) 0x64a,
            (char) 0x633, (char) 0x634, (char) 0x638, (char) 0x67e,
            (char) 0x686, (char) 0x6a9, (char) 0x6af, (char) 0x6cc,
            (char) 0x626 };
    int i = 0;
    while (i < 28) {
        if (ch == theSet1[i])
            return true;
        ++i;
    }
    return false;
}

private static final boolean isFromTheSet2(/* WCHAR */char ch) {
    char[] theSet2 = new char[] { (char) 0x627, (char) 0x623, (char) 0x625,
            (char) 0x622, (char) 0x62f, (char) 0x630, (char) 0x631,
            (char) 0x632, (char) 0x648, (char) 0x624, (char) 0x629,
            (char) 0x649, (char) 0x698, (char) 0x6c0 };
    int i = 0;
    while (i < 14) {
        if (ch == theSet2[i])
            return true;
        ++i;
    }
    return false;
}

private static final String MakeReverse(String text) {
    String Result = "";
    char[] Ctext = new char[text.length()];
    Ctext = text.toCharArray();
    for (int i = (text.length()) - 1; i >= 0; i--) {
        Result += Ctext[i];
    }
    return Result;
}

public static final String ConvertBackToRealFarsi(String In) {

    if (!isFarsiConversionNeeded) {
        return In;
    }

    String strOut = "";
    StringBuilder strBuilder = new StringBuilder("");
    int i = 0;
    int j = 0;
    char[] chIn = new char[In.length()];
    chIn = In.toCharArray();

    for (i = 0; i < In.length(); i++) {
        boolean found = false;
        for (j = 0; j < arrStruc.length; j++) {
            if (chIn[i] == arrStruc[j].midGlyph ||
                    chIn[i] == arrStruc[j].iniGlyph ||
                    chIn[i] == arrStruc[j].endGlyph ||
                    chIn[i] == arrStruc[j].isoGlyph) {
                strBuilder.append(arrStruc[j].character);
                found = true;
                break;
            }
        }
        if (!found)
            strBuilder.append(chIn[i]);
    }

    strOut = strBuilder.toString();
    strOut = strOut.replace(szLa, "áÇ");
    strOut = strOut.replace(szLaStick, "áÇ");

    return strOut;
}

public static final String ConvertForDrawOnBitmap(String In) {
    return ArabicReverse(Convert(In));
}

public static final String Convert(String In) {

    if (!isFarsiConversionNeeded) {
        return In;
    }

    boolean linkBefore, linkAfter;
    String Out = In;
    char[] chOut = new char[Out.length()];
    chOut = Out.toCharArray();
    char[] chIn = new char[In.length()];
    chIn = In.toCharArray();

    for (int i = 0; i < In.length(); i++) {
        /* WCHAR */
        char ch = chIn[i];
        if ((ch >= (char) 0x0621 && ch <= (char) 0x064a)
                || (ch == (char) 0x067e) || (ch == (char) 0x0686)
                || (ch == (char) 0x0698) || (ch == (char) 0x06a9)
                || (ch == (char) 0x06af) || (ch == (char) 0x06cc)
                || (ch == (char) 0x06c0)) // is a Farsi character?
        {
            int idx = 0;
            while (idx < N_DISTINCT_CHARACTERS) {
                if (arrStruc[idx].character == chIn[i])
                    break;
                ++idx;
            }

            if (i == In.length() - 1)
                linkAfter = false;
            else
                linkAfter = (isFromTheSet1(chIn[i + 1]) || isFromTheSet2(chIn[i + 1]));
            if (i == 0)
                linkBefore = false;
            else
                linkBefore = isFromTheSet1(chIn[i - 1]);
            if (idx < N_DISTINCT_CHARACTERS) {
                if (linkBefore && linkAfter)
                    chOut[i] = arrStruc[idx].midGlyph;
                if (linkBefore && !linkAfter)
                    chOut[i] = arrStruc[idx].endGlyph;
                if (!linkBefore && linkAfter)
                    chOut[i] = arrStruc[idx].iniGlyph;
                if (!linkBefore && !linkAfter)
                    chOut[i] = arrStruc[idx].isoGlyph;
            } else {
                chOut[i] = chIn[i];
            }
        } else {
            chOut[i] = chIn[i];
        }
    }
    Out = "";
    for (int j = 0; j < chOut.length; j++)
        Out += chOut[j];
    // Out = ArabicReverse(Out);

    Out = Out.replace((char) 0x200c, ' '); // Change NO SPACE to SPACE

    Out = Out.replace(szLamAndAlef, szLa); // Join 'Lam' and 'Alef' and
                                            // make 'La'
    Out = Out.replace(szLamStickAndAlef, szLaStick); // Join 'Lam Stick'
                                                        // and 'Alef'
                                                        // and make 'La
                                                        // Stick'

    return reorderWords(Out);

}

private final static String reorderWords(String strIn)
{

    final int ST_RTL = 0;
    final int ST_LTR = 1;

    String strOut = "";
    String prevWord = "";
    int state = ST_RTL;
    char[] arr = strIn.toCharArray();
    int i = 0;
    while (i < arr.length) {
        if (charIsLTR(arr[i]) && state != ST_LTR)
        {
            // state changed to LTR
            state = ST_LTR;
            strOut = prevWord + strOut;
            prevWord = "";
            prevWord += arr[i];
        }
        else if (charIsRTL(arr[i]) && state != ST_RTL)
        {
            // state changed to RTL
            state = ST_RTL;
            strOut = prevWord + strOut;
            prevWord = "";
            prevWord += arr[i];
        }
        else
        {
            // state is not changed
            prevWord += arr[i];
        }
        i++;
    }

    strOut = prevWord + strOut;

    return strOut;

}

private final static boolean charIsLTR(char ch)
{
    return (ch >= (char) 65 & ch <= (char) 122)
            |
            Character.isDigit(ch);
}

private final static boolean charIsRTL(char ch)
{
    return ch >= (char) 0x0621;
}

public static final String ConvertForPrinterWoosim(String In) {
    try {

        boolean linkBefore, linkAfter;
        String Out = In;
        char[] chOut = new char[Out.length()];
        chOut = Out.toCharArray();
        char[] chIn = new char[In.length()];
        chIn = In.toCharArray();

        for (int i = 0; i < In.length(); i++) {
            /* WCHAR */
            char ch = chIn[i];
            if ((ch >= (char) 0x0621 && ch <= (char) 0x064a)
                    || (ch == (char) 0x067e) || (ch == (char) 0x0686)
                    || (ch == (char) 0x0698) || (ch == (char) 0x06a9)
                    || (ch == (char) 0x06af) || (ch == (char) 0x06cc)
                    || (ch == (char) 0x06c0)) // is an Arabic character?
            {
                int idx = 0;
                while (idx < N_DISTINCT_CHARACTERS) {
                    if (arrStrucWoosim[idx].character == chIn[i])
                        break;
                    ++idx;
                }

                if (i == In.length() - 1)
                    linkAfter = false;
                else
                    linkAfter = (isFromTheSet1(chIn[i + 1]) || isFromTheSet2(chIn[i + 1]));
                if (i == 0)
                    linkBefore = false;
                else
                    linkBefore = isFromTheSet1(chIn[i - 1]);
                if (idx < N_DISTINCT_CHARACTERS) {
                    if (linkBefore && linkAfter)
                        chOut[i] = arrStrucWoosim[idx].midGlyph;
                    if (linkBefore && !linkAfter)
                        chOut[i] = arrStrucWoosim[idx].endGlyph;
                    if (!linkBefore && linkAfter)
                        chOut[i] = arrStrucWoosim[idx].iniGlyph;
                    if (!linkBefore && !linkAfter)
                        chOut[i] = arrStrucWoosim[idx].isoGlyph;
                } else {
                    chOut[i] = chIn[i];
                }
            } else {
                chOut[i] = chIn[i];
            }
        }
        Out = "";
        for (int j = 0; j < chOut.length; j++)
            Out += chOut[j];
        // ArabicReverse(Out);

        Out = Out.replace((char) 0x200c, ' '); // Change NO SPACE to SPACE

        Out = Out.replace(szLamAndAlefWoosim, szLaWoosim); // Join 'Lam' and
                                                            // 'Alef' and
        // make 'La'
        Out = Out.replace(szLamStickAndAlefWoosim, szLaStickWoosim); // Join
                                                                        // 'Lam
                                                                        // Stick'
        // and 'Alef'
        // and make 'La
        // Stick'

        return Out;
    } catch (Exception ex) {
        // throw new
        // Exception("An exception has occurred in Arabize function.\\n" +
        // ex.getMessage());
        return "";
    }
}

private static Typeface typeface;

public static final Typeface GetFarsiFont(Context act) {
    if (typeface == null) {
        typeface = Typeface.createFromAsset(act.getAssets(),
                // "DroidSansFallback.ttf");
                "TAHOMA.TTF");
    }
    return typeface;
}

}

you may even check this thread on SO.