[转帖]自动调整TextView字体大小以适应文字长度
抱歉，具体出处忘记了
package com.test.android.textview;import android.content.Context;import android.graphics.Paint;import android.util.AttributeSet;import android.widget.TextView;public class CustomTextView extends TextView {private static float DEFAULT_MIN_TEXT_SIZE = 10;private static float DEFAULT_MAX_TEXT_SIZE = 20;// Attributesprivate Paint testPaint;private float minTextSize, maxTextSize;public CustomTextView(Context context, AttributeSet attrs) {super(context, attrs);initialise();}private void initialise() {testPaint = new Paint();testPaint.set(this.getPaint());// max size defaults to the intially specified text size unless it is// too smallmaxTextSize = this.getTextSize();if (maxTextSize <= DEFAULT_MIN_TEXT_SIZE) {maxTextSize = DEFAULT_MAX_TEXT_SIZE;}minTextSize = DEFAULT_MIN_TEXT_SIZE;};/** * Re size the font so the specified text fits in the text box * assuming * the text box is the specified width. */private void refitText(String text, int textWidth) {if (textWidth > 0) {int availableWidth = textWidth - this.getPaddingLeft()- this.getPaddingRight();float trySize = maxTextSize;testPaint.setTextSize(trySize);while ((trySize > minTextSize)&& (testPaint.measureText(text) > availableWidth)) {trySize -= 1;if (trySize <= minTextSize) {trySize = minTextSize;break;}testPaint.setTextSize(trySize);}this.setTextSize(trySize);}};@Overrideprotected void onTextChanged(CharSequence text, int start, int before,int after) {super.onTextChanged(text, start, before, after);refitText(text.toString(), this.getWidth());}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {if (w != oldw) {refitText(this.getText().toString(), w);}}}