android– 自动调整TextView以在画布上绘制

概述我尝试在PDF文档上显示一些文本.此文本可能很长或很短,但应该在一行上.这就是我选择TextViewCompat.setAutoSizeTextTypeWithDefaults实用程序方法的原因,但在画布上绘图时它似乎不起作用.文本被裁剪而不是减少.这是我的代码：PageInfo startingPageInfo = new Builder(STANDARD

我尝试在pdf文档上显示一些文本.此文本可能很长或很短,但应该在一行上.这就是我选择TextVIEwCompat.setautoSizeTextTypeWithDefaults实用程序方法的原因,但在画布上绘图时它似乎不起作用.文本被裁剪而不是减少.

这是我的代码：

PageInfo startingPageInfo = new Builder(STANDARD_pdf_PAGE_WIDTH,STANDARD_pdf_PAGE_HEIGHT,1).create();final Page startingPage = document.startPage(startingPageInfo);Canvas canvas = startingPage.getCanvas();canvas.save();final TextVIEw documentTitle = new TextVIEw(this);TextVIEwCompat.setautoSizeTextTypeWithDefaults(documentTitle,TextVIEwCompat.auto_SIZE_TEXT_TYPE_UNIFORM);documentTitle.setlines(1);documentTitle.setText(String.format("%s - %s",category.getname(),period));documentTitle.setTextSize(TypedValue.COMPLEX_UNIT_SP,56);documentTitle.setTypeface(null,BolD);documentTitle.setTextcolor(color.BLACK);int measureDWIDth = MeasureSpec.makeMeasureSpec(canvas.getWIDth() - 100,MeasureSpec.EXACTLY);int measuredHeight = MeasureSpec.makeMeasureSpec(100,MeasureSpec.EXACTLY);documentTitle.measure(measureDWIDth,measuredHeight);documentTitle.layout(0,measureDWIDth,measuredHeight); canvas.translate(TitleDx,TitleDy);documentTitle.draw(canvas);

我对AndroID内部的自定义视图感到不舒服,所以我可能在这里做错了,任何帮助都会受到赞赏.最佳答案Rewrite2

您遇到的麻烦是由以下行引起的：

documentTitle.layout(0,measuredHeight);

这一行应该是：

documentTitle.layout(0,wIDth,height);

您的代码将宽度和高度设置为某些天文值,因此文本始终“适合”.

这是(主要)您的代码工作的简短演示.我使用了自定义linearLayout,但这无关紧要.我认为只是上面的改变本身应该有效,但我可能已经做了一些其他的小调整,你可以在下面的代码中找到.

MylinearLayout.java

public class MylinearLayout extends linearLayout {    private AppCompatTextVIEw documentTitle;    public MylinearLayout(@NonNull Context context) {        super(context);        init();    }    public MylinearLayout(@NonNull Context context,@Nullable AttributeSet attrs) {        super(context,attrs);        init();    }    public MylinearLayout(@NonNull Context context,@Nullable AttributeSet attrs,int defStyleAttr) {        super(context,attrs,defStyleAttr);        init();    }    private voID init() {        documentTitle = new AppCompatTextVIEw(this.getContext());    }    @OverrIDe    public voID onDraw(Canvas canvas) {        super.onDraw(canvas);        String displayString = String.format("%s - %s","Some very,very,","very,very long text");        int wIDth = getWIDth() - getpaddingEnd();        int height = 100;        VIEwGroup.LayoutParams lp = new VIEwGroup.LayoutParams(wIDth,height);        documentTitle.setLayoutParams(lp);        TextVIEwCompat.setautoSizeTextTypeWithDefaults(documentTitle,TextVIEwCompat.auto_SIZE_TEXT_TYPE_UNIFORM);        documentTitle.setTextSize(TypedValue.COMPLEX_UNIT_SP,56);        documentTitle.setTypeface(null,BolD);        documentTitle.setTextcolor(color.BLACK);        documentTitle.setMaxlines(1);        int measureDWIDth = MeasureSpec.makeMeasureSpec(wIDth,MeasureSpec.EXACTLY);        int measuredHeight = MeasureSpec.makeMeasureSpec(height,MeasureSpec.EXACTLY);        documentTitle.measure(measureDWIDth,measuredHeight);        // Arguments here are wIDth and height,not measureWIDth and measeredHeight.        documentTitle.layout(0,height);        canvas.save();        for (int i = 0; i < 5; i++) {            documentTitle.setText(displayString);            documentTitle.draw(canvas);            displayString += " - longer - longer";            canvas.translate(0,150);        }        canvas.restore();    }}

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