TextView的竖排版

1.TextView的mes属性：

（不建议使用）

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:maxEms="1"
    android:textSize="28sp"
    android:textColor="@color/black"
    android:text="竖排版"/>

TextView的width一定不能是match_parent

2.PlumbTextViwe

(github开源地址：https://github.com/lybeat/PlumbTextView)

Gradle依赖：compile 'cc.sayaki.widget:plumb-textview:1.0.1'

Layout使用：

<cc.sayaki.widget.PlumbTextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:paddingBottom="30dp"
    android:paddingTop="30dp"
    sayaki:columnSpacing="20dp"
    sayaki:leftLine="true"
    sayaki:leftLineColor="@color/colorAccent"
    sayaki:leftLinePadding="4dp"
    sayaki:letterSpacing="6dp"
    sayaki:regex="[，。？！]"
    sayaki:text="@string/text"
    sayaki:textColor="@color/colorAccent"
    sayaki:textSize="16sp"
    sayaki:textStyle="bold|italic" />

3.自定义TextView

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);
    }
}