package com.dcs.tools; import java.util.Vector; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Paint.FontMetrics; import android.view.KeyEvent; public class TextUtil { private float mTextPosx = 0;// x坐标 private float mTextPosy = 0;// y坐标 private float mTextWidth = 0;// 绘制宽度 private float mTextHeight = 0;// 绘制高度 private int mFontHeight = 0;// 绘制字体高度 private int mPageLineNum = 0;// 每一页显示的行数 private int mCanvasBGColor = 0;// 背景颜色 private int mFontColor = 0;// 字体颜色 private int mAlpha = 0;// Alpha值 private int mRealLine = 0;// 字符串真实的行数 private int mCurrentLine = 0;// 当前行 private int mTextSize = 0;// 字体大小 private String mStrText = ""; private Vector mString = null; private Paint mPaint = null; public TextUtil(String StrText, float x, float y, float w, float h, int bgcolor, int textcolor, int alpha, int textsize) { mPaint = new Paint(); mString = new Vector(); this.mStrText = StrText; this.mTextPosx = x; this.mTextPosy = y; this.mTextWidth = w; this.mTextHeight = h; this.mCanvasBGColor = bgcolor; this.mFontColor = textcolor; this.mAlpha = alpha; this.mTextSize = textsize; } public void InitText() { mString.clear();// 清空Vector // 对画笔属性的设置 // mPaint.setARGB(this.mAlpha, Color.red(this.mFontColor), Color // .green(this.mFontColor), Color.blue(this.mFontColor)); mPaint.setTextSize(this.mTextSize); mPaint.setColor(Color.BLUE); mPaint.setAntiAlias(true); this.GetTextIfon(); } /** * 得到字符串信息包括行数,页数等信息 */ public void GetTextIfon() { char ch; int w = 0; int istart = 0; FontMetrics fm = mPaint.getFontMetrics();// 得到系统默认字体属性 mFontHeight = (int) (Math.ceil(fm.descent - fm.top) + 2);// 获得字体高度 mPageLineNum = (int) (mTextHeight / mFontHeight);// 获得行数 int count = this.mStrText.length(); for (int i = 0; i < count; i++) { ch = this.mStrText.charAt(i); float[] widths = new float[1]; String str = String.valueOf(ch); mPaint.getTextWidths(str, widths); if (ch == '/n') { mRealLine++;// 真实的行数加一 mString.addElement(this.mStrText.substring(istart, i)); istart = i + 1; w = 0; } else { w += (int) Math.ceil(widths[0]); if (w > this.mTextWidth) { mRealLine++;// 真实的行数加一 mString.addElement(this.mStrText.substring(istart, i)); istart = i; i--; w = 0; } else { if (i == count - 1) { mRealLine++;// 真实的行数加一 mString.addElement(this.mStrText.substring(istart, count)); } } } } } /** * 绘制字符串 * * @param canvas */ public void DrawText(Canvas canvas) { for (int i = this.mCurrentLine, j = 0; i < this.mRealLine; i++, j++) { if (j > this.mPageLineNum) { break; } canvas.drawText((String) (mString.elementAt(i)), this.mTextPosx, this.mTextPosy + this.mFontHeight * j, mPaint); } } /** * 翻页等按键处理 * * @param keyCode * @param event * @return */ public boolean KeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_DPAD_UP) { if (this.mCurrentLine > 0) { this.mCurrentLine--; } } else if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) { if ((this.mCurrentLine + this.mPageLineNum) < (this.mRealLine - 1)) { this.mCurrentLine++; } } return false; } }