/// <summary>
/// 打印文本内容
/// </summary>
/// <param name="message">打印的内容</param>
/// <param name="err">2:没有开启蓝牙，3：没有连接打印机，4：butmap为null,5:程序出现异常</param>
/// <returns></returns>
public bool SendMessage(Java.Lang.String message, out int err)
{
err = 0;
if (!isopen)
{
err = 2;
return(false);
}
if (this.chatService.GetState() != BluetoothService.STATE_CONNECTED)
{
err = 3;
return(false);
}
if (message.Length() <= 0)
{
err = 4;
return(false);
}
try
{
byte[] send = message.GetBytes();
chatService.Write(send);
return(true);
}
catch
{
err = 5;
return(false);
}
// Get the message bytes and tell the BluetoothService to write
}
/// <summary>
/// 打印文本内容
/// </summary>
/// <param name="message">打印的内容</param>
/// <param name="err">2:没有开启蓝牙，3：没有连接打印机，4：butmap为null,5:程序出现异常</param>
/// <returns></returns>
public int SendMessage(Java.Lang.String message)
{
int err = 0;
if (!isopen)
{
err = (int)PrintError.OpenFailure;
return(err);
}
if (this.chatService.GetState() != BluetoothService.STATE_CONNECTED)
{
err = (int)PrintError.ConnectedFailure;
return(err);
}
if (message.Length() <= 0)
{
err = (int)PrintError.SendNull;;
return(err);
}
try
{
byte[] send = message.GetBytes("GB2312");
chatService.Write(send);
err = 1;
return(err);
}
catch
{
err = (int)PrintError.SendFailure;;
return(err);
}
// Get the message bytes and tell the BluetoothService to write
}
/**
* 根据起始位置指针，读取一页内容
*
* @return
*/
private Vector pageDown()
{
Java.Lang.String strParagraph = new Java.Lang.String();
Vector lines = new Vector();
int paraSpace = 0;
mPageLineCount = mVisibleHeight / (mFontSize + mLineSpace);
while ((lines.Size() < mPageLineCount) && (curEndPos < mbBufferLen))
{
byte[] parabuffer = readParagraphForward(curEndPos);
curEndPos += parabuffer.Length;
try
{
strParagraph = new Java.Lang.String(parabuffer, charset);
}
catch (UnsupportedEncodingException e)
{
e.PrintStackTrace();
}
strParagraph = new Java.Lang.String(strParagraph.ReplaceAll("\r\n", " "));
strParagraph = new Java.Lang.String(strParagraph.ReplaceAll("\n", " ")); // 段落中的换行符去掉，绘制的时候再换行
while (strParagraph.Length() > 0)
{
int paintSize = mPaint.BreakText(strParagraph.ToString(), true, mVisibleWidth, null);
lines.Add(strParagraph.Substring(0, paintSize));
strParagraph = new Java.Lang.String(strParagraph.Substring(paintSize));
if (lines.Size() >= mPageLineCount)
{
break;
}
}
lines.Set(lines.Size() - 1, lines.Get(lines.Size() - 1) + "@");
if (strParagraph.Length() != 0)
{
try
{
curEndPos -= (strParagraph).GetBytes(charset).Length;
}
catch (UnsupportedEncodingException e)
{
e.PrintStackTrace();
}
}
paraSpace += mLineSpace;
mPageLineCount = (mVisibleHeight - paraSpace) / (mFontSize + mLineSpace);
}
return(lines);
}
/**
* 指针移到上一页页首
*/
private void pageUp()
{
Java.Lang.String strParagraph = new Java.Lang.String();
Vector lines = new Vector(); // 页面行
int paraSpace = 0;
mPageLineCount = mVisibleHeight / (mFontSize + mLineSpace);
while ((lines.Size() < mPageLineCount) && (curBeginPos > 0))
{
Vector paraLines = new Vector(); // 段落行
byte[] parabuffer = readParagraphBack(curBeginPos); // 1.读取上一个段落
curBeginPos -= parabuffer.Length; // 2.变换起始位置指针
try
{
strParagraph = new Java.Lang.String(parabuffer, charset);
}
catch (UnsupportedEncodingException e)
{
e.PrintStackTrace();
}
strParagraph = new Java.Lang.String(strParagraph.ReplaceAll("\r\n", " "));
strParagraph = new Java.Lang.String(strParagraph.ReplaceAll("\n", " "));
while (strParagraph.Length() > 0)
{ // 3.逐行添加到lines
int paintSize = mPaint.BreakText(strParagraph.ToString(), true, mVisibleWidth, null);
paraLines.Add(strParagraph.Substring(0, paintSize));
strParagraph = new Java.Lang.String(strParagraph.Substring(paintSize));
}
lines.AddAll(0, paraLines.ToArray());
while (lines.Size() > mPageLineCount)
{ // 4.如果段落添加完，但是超出一页，则超出部分需删减
try
{
curBeginPos += (new Java.Lang.String(lines.Get(0).ToString())).GetBytes(charset).Length; // 5.删减行数同时起始位置指针也要跟着偏移
lines.Remove(0);
}
catch (UnsupportedEncodingException e)
{
e.PrintStackTrace();
}
}
curEndPos = curBeginPos; // 6.最后结束指针指向下一段的开始处
paraSpace += mLineSpace;
mPageLineCount = (mVisibleHeight - paraSpace) / (mFontSize + mLineSpace); // 添加段落间距，实时更新容纳行数
}
}