我发现下面的方法对我很有用。它不循环，同时考虑高度和宽度。注意，在视图上调用setTextSize时指定PX单位是很重要的。

Paint paint = adjustTextSize(getPaint(), numChars, maxWidth, maxHeight);
setTextSize(TypedValue.COMPLEX_UNIT_PX,paint.getTextSize());

下面是我使用的例程，从视图中传入getPaint()。带有'wide'字符的10个字符的字符串用于估计独立于实际字符串的宽度。

private static final String text10="OOOOOOOOOO";
public static Paint adjustTextSize(Paint paint, int numCharacters, int widthPixels, int heightPixels) {
    float width = paint.measureText(text10)*numCharacters/text10.length();
    float newSize = (int)((widthPixels/width)*paint.getTextSize());
    paint.setTextSize(newSize);

    // remeasure with font size near our desired result
    width = paint.measureText(text10)*numCharacters/text10.length();
    newSize = (int)((widthPixels/width)*paint.getTextSize());
    paint.setTextSize(newSize);

    // Check height constraints
    FontMetricsInt metrics = paint.getFontMetricsInt();
    float textHeight = metrics.descent-metrics.ascent;
    if (textHeight > heightPixels) {
        newSize = (int)(newSize * (heightPixels/textHeight));
        paint.setTextSize(newSize);
    }

    return paint;
}

我从Chase的解决方案开始，但在我的设备(Galaxy Nexus, Android 4.1)上正常工作之前，我必须调整两件事:

using a copy of TextPaint for measuring layout The documentation for TextView.getPaint() states that it should be used read-only, so I made a copy in both places where we use the paint object for measuring: // 1. in resizeText() if (mAddEllipsis && targetTextSize == mMinTextSize && textHeight > height) { // Draw using a static layout // modified: use a copy of TextPaint for measuring TextPaint paint = new TextPaint(textPaint); // 2. in getTextHeight() private int getTextHeight(CharSequence source, TextPaint originalPaint, int width, float textSize) { // modified: make a copy of the original TextPaint object for measuring // (apparently the object gets modified while measuring, see also the // docs for TextView.getPaint() (which states to access it read-only) TextPaint paint = new TextPaint(originalPaint); // Update the text paint object paint.setTextSize(textSize); ... adding a unit to setting the text size // modified: setting text size via this.setTextSize (instead of textPaint.setTextSize(targetTextSize)) setTextSize(TypedValue.COMPLEX_UNIT_PX, targetTextSize); setLineSpacing(mSpacingAdd, mSpacingMult);

With these two modifications the solution is working perfectly for me, thanks Chase! I don't know whether it is due to Android 4.x that the original solution was not working. In case you want to see it in action or test whether it really works on your device, you can have a look at my flashcard app Flashcards ToGo where I use this solution to scale the text of a flashcard. The text can have arbitrary length, and the flashcards are displayed in different activities, sometimes smaller sometimes bigger, plus in landscape + portrait mode, and I haven't found any corner case where the solution would not work properly...

参考ScalableTextView.java这里自动适合Android的TextView。我已经添加了代码来根据文本长度收缩和扩展TextView

适合边界的文本(1行)

让文本缩小到适合一行的边界:

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:autoSizeTextType="uniform"
    android:lines:"1"
/>

你可以使用android.text.StaticLayout类。这就是TextView内部使用的。

以下是我为那些还在找工作的人找到的一些东西:

1)这里有一个解决方案，递归重新绘制的textview，直到它适合。这意味着字面上看着你的文本缩小到合适的位置，但至少当它完成时它是合适的。代码需要一些调整才能实现，但基本上已经完成了。

2)你可以试着把一个自定义的解决方案像这样，或dunni的类在这里，这是我所做的使用getPaint().measureText(str)来搜索正确的大小，但它得到了很多混乱，因为我需要它只包装在空白…

3)你可以继续寻找——我已经尝试了数不清的选择。泰德关于StaticLayout的建议对我来说没有回报，但也许有一些东西;我尝试使用StaticLayout.getEllipsis(line)来确定文本是否离开屏幕，但没有效果。在这里可以看到我的帖子(目前没有回复)。