垂直的TextView

所先声明一下这个类是我从网上找到的一篇文章，只是保留并没有侵权的意思。

public class TextViewVertical extends View {
    public static final int LAYOUT_CHANGED = 1;
    private Paint paint;
    private int mTextPosx = 0;// x坐标
    private int mTextPosy = 0;// y坐标
    private int mTextWidth = 0;// 绘制宽度
    private int mTextHeight = 0;// 绘制高度
    private int mFontHeight = 0;// 绘制字体高度
    private float mFontSize = 24;// 字体大小
    private int mRealLine = 0;// 字符串真实的行数
    private int mLineWidth = 0;//列宽度
    private int TextLength = 0;//字符串长度
    private int oldwidth = 0;//存储久的width
    private String text = "";//待显示的文字
    private Handler mHandler = null;
    private Matrix matrix;
    BitmapDrawable drawable = (BitmapDrawable) getBackground();

    public TextViewVertical(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public TextViewVertical(Context context, AttributeSet attrs) {
        super(context, attrs);
        matrix = new Matrix();
        paint = new Paint();//新建画笔
        paint.setTextAlign(Paint.Align.CENTER);//文字居中
        paint.setAntiAlias(true);//平滑处理
        paint.setColor(Color.BLACK);//默认文字颜色
        try {
            mFontSize = Float.parseFloat(attrs.getAttributeValue(null, "textSize"));//获取字体大小属性
        } catch (Exception e) {
        }
    }
    //设置文字
    public final void setText(String text) {
        this.text = text;
        this.TextLength = text.length();
        if (mTextHeight > 0) GetTextInfo();
    }

    //设置字体大小
    public final void setTextSize(float size) {
        if (size != paint.getTextSize()) {
            mFontSize = size;
            if (mTextHeight > 0) GetTextInfo();
        }
    }

    //设置字体颜色
    public final void setTextColor(int color) {
        paint.setColor(color);
    }

    //设置字体颜色
    public final void setTextARGB(int a, int r, int g, int b) {
        paint.setARGB(a, r, g, b);
    }

    //设置字体
    public void setTypeface(Typeface tf) {
        if (this.paint.getTypeface() != tf) {
            this.paint.setTypeface(tf);
        }
    }

    //设置行宽
    public void setLineWidth(int LineWidth) {
        mLineWidth = LineWidth;
    }

    //获取实际宽度
    public int getTextWidth() {
        return mTextWidth;
    }

    //设置Handler，用以发送事件
    public void setHandler(Handler handler) {
        mHandler = handler;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        Log.v("TextViewVertical", "onDraw");
        if (drawable != null) {
            //画背景
            Bitmap b = Bitmap.createBitmap(drawable.getBitmap(), 0, 0, mTextWidth, mTextHeight);
            canvas.drawBitmap(b, matrix, paint);
        }
        //画字
        draw(canvas, this.text);
    }

    private void draw(Canvas canvas, String thetext) {
        char ch;
        mTextPosy = 0;//初始化y坐标
        mTextPosx = mTextWidth - mLineWidth;//初始化x坐标        for (int i = 0; i < this.TextLength; i++) {            ch = thetext.charAt(i);            if (ch == '
') {                mTextPosx -= mLineWidth;// 换列                mTextPosy = 0;            } else {                mTextPosy += mFontHeight;                if (mTextPosy > this.mTextHeight) {                    mTextPosx -= mLineWidth;// 换列                    i--;                    mTextPosy = 0;                } else {                    canvas.drawText(String.valueOf(ch), mTextPosx, mTextPosy, paint);                }            }        }        //调用接口方法        //activity.getHandler().sendEmptyMessage(TestFontActivity.UPDATE);    }    //计算文字行数和总宽    private void GetTextInfo() {        Log.v("TextViewVertical", "GetTextInfo");        char ch;        int h = 0;        paint.setTextSize(mFontSize);        //获得字宽        if (mLineWidth == 0) {            float[] widths = new float[1];            paint.getTextWidths("正", widths);//获取单个汉字的宽度            mLineWidth = (int) Math.ceil(widths[0] * 1.1 + 2);        }        Paint.FontMetrics fm = paint.getFontMetrics();        mFontHeight = (int) (Math.ceil(fm.descent - fm.top) * 0.9);// 获得字体高度        //计算文字行数        mRealLine = 0;        for (int i = 0; i < this.TextLength; i++) {            ch = this.text.charAt(i);            if (ch == '
') {                mRealLine++;// 真实的行数加一                h = 0;            } else {                h += mFontHeight;                if (h > this.mTextHeight) {                    mRealLine++;// 真实的行数加一                    i--;                    h = 0;                } else {                    if (i == this.TextLength - 1) {                        mRealLine++;// 真实的行数加一                    }                }            }        }        mRealLine++;//额外增加一行        mTextWidth = mLineWidth * mRealLine;//计算文字总宽度        measure(mTextWidth, getHeight());//重新调整大小        layout(getLeft(), getTop(), getLeft() + mTextWidth, getBottom());//重新绘制容器    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        int measuredHeight = measureHeight(heightMeasureSpec);        //int measuredWidth = measureWidth(widthMeasureSpec);        if (mTextWidth == 0) GetTextInfo();        setMeasuredDimension(mTextWidth, measuredHeight);        if (oldwidth != getWidth()) {//            oldwidth = getWidth();            if (mHandler != null) mHandler.sendEmptyMessage(LAYOUT_CHANGED);        }    }    private int measureHeight(int measureSpec) {        int specMode = MeasureSpec.getMode(measureSpec);        int specSize = MeasureSpec.getSize(measureSpec);        int result = 500;        if (specMode == MeasureSpec.AT_MOST) {            result = specSize;        } else if (specMode == MeasureSpec.EXACTLY) {            result = specSize;        }        mTextHeight = result;//设置文本高度        return result;    }}

然后在xml 引用这个路径比如：

<com.testapp.view.TextViewVertical
    android:id="@+id/tv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="#dd00"
    android:textSize="20sp" />