根据文本区域的宽度计算文本大小

Question

我有一个文本应该设置为具有指定宽度的TextView.它需要计算文本大小以使其适合TextView.

换句话说:有没有办法将文本放入TextView区域,比如ImageView缩放类型功能？

Answer 1

这应该是一个简单的解决方案:

public void correctWidth(TextView textView, int desiredWidth)
{
    Paint paint = new Paint();
    Rect bounds = new Rect();

    paint.setTypeface(textView.getTypeface());
    float textSize = textView.getTextSize();
    paint.setTextSize(textSize);
    String text = textView.getText().toString();
    paint.getTextBounds(text, 0, text.length(), bounds);

    while (bounds.width() > desiredWidth)
    {
        textSize--;
        paint.setTextSize(textSize);
        paint.getTextBounds(text, 0, text.length(), bounds);
    }

    textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
}

Answer 2

如果它是文本占用你的空间的大小,那么以下可能会有所帮助:

Paint paint = new Paint();
Rect bounds = new Rect();

int text_height = 0;
int text_width = 0;

paint.setTypeface(Typeface.DEFAULT);// your preference here
paint.setTextSize(25);// have this the same as your text size

String text = "Some random text";

paint.getTextBounds(text, 0, text.length(), bounds);

text_height =  bounds.height();
text_width =  bounds.width();

编辑(评论后):反过来使用上面的内容:

int text_height = 50;
int text_width = 200;

int text_check_w = 0;
int text_check_h = 0;

int incr_text_size = 1;
boolean found_desired_size = true;

while (found_desired_size){
    paint.setTextSize(incr_text_size);// have this the same as your text size

    String text = "Some random text";

    paint.getTextBounds(text, 0, text.length(), bounds);

    text_check_h =  bounds.height();
    text_check_w =  bounds.width();
    incr_text_size++;

if (text_height == text_check_h && text_width == text_check_w){
found_desired_size = false;
}
}
return incr_text_size; // this will be desired text size from bounds you already have

//这个方法可能会稍微调整一下,但会让你知道你能做些什么

Answer 3

 public static float getFitTextSize(TextPaint paint, float width, String text) {
     float nowWidth = paint.measureText(text);
     float newSize = (float) width / nowWidth * paint.getTextSize();
     return newSize;
 }