TextView的纵向排列(te,textviewvertical,textview的纵向排列,开发技术)

通用情况下，我们都是用TextView的横向排列，但有时候需求需要用到纵向排列，此时就傻眼了，本人也因此摘了两篇文章，供参考：

1、仅文字方向纵向排列，文字并没有翻转

public class VerticalTextView extends TextView{

final boolean topDown;

public VerticalTextView(Context context, AttributeSet attrs){

super(context, attrs);

final int gravity = getGravity();

if(Gravity.isVertical(gravity) && (gravity&Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {

setGravity((gravity&Gravity.HORIZONTAL_GRAVITY_MASK) | Gravity.TOP);

topDown = false;

}else

topDown = true;

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){

super.onMeasure(heightMeasureSpec, widthMeasureSpec);

setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());

}

@Override

protected boolean setFrame(int l, int t, int r, int b){

return super.setFrame(l, t, l+(b-t), t+(r-l));

}

@Override

public void draw(Canvas canvas){

if(topDown){

canvas.translate(getHeight(), 0);

canvas.rotate(90);

}else {

canvas.translate(0, getWidth());

canvas.rotate(-90);

}

canvas.clipRect(0, 0, getWidth(), getHeight(), android.graphics.Region.Op.REPLACE);

super.draw(canvas);

}

}

2、文字正常的纵向排列（真实需求）

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(Align.CENTER);//文字居中

paint.setAntiAlias(true);//平滑处理

paint.setColor(Color.BLUE);//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){}

}

/*

//获取整数值

private final int getAttributeIntValue(AttributeSet attrs,String field) {

int intVal = 0;

//TODO

//应该可以直接用attrs.getAttributeIntValue()获取对应的数值的，

//但不知道为什么一直无法获得只好临时写个函数凑合着用,没有写完整，暂时只支持px作为单位，其它单位的转换有空再写

String tempText=attrs.getAttributeValue(androidns, field);

intVal = (int)Math.ceil(Float.parseFloat(tempText.replaceAll("px","")));

return intVal;

}*/

//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 == '\n') {

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);

}

}

}

}

//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);

}

FontMetrics fm = paint.getFontMetrics();

mFontHeight = (int) (Math.ceil(fm.descent - fm.top) * 1.0);// 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 == '\n') {

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);

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;

}

}

有空的亲，请自己测试一下！