- package com.yitong.mbank.android.views;
- import android.content.Context;
- import android.graphics.Paint;
- import android.graphics.Paint.FontMetrics;
- import android.util.AttributeSet;
- import android.widget.EditText;
- public class AutoAdjustSizeEditText extends EditText {
- private static float DEFAULT_MIN_TEXT_SIZE = 10; // 最小的字体大小
- private static float DEFAULT_MAX_TEXT_SIZE = 20;// 验证大部分手机情况下无效值
- // Attributes
- private Paint testPaint;
- private float minTextSize, maxTextSize;
- public AutoAdjustSizeEditText(Context context, AttributeSet attrs) {
- super(context, attrs);
- initialise();
- }
- private void initialise() {
- testPaint = new Paint();
- testPaint.set(this.getPaint()); // 获取模拟的paint
- // max size defaults to the intially specified text size unless it is
- // too small
- maxTextSize = this.getTextSize();// 获取单个字体的像素
- 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();// 获取改TextView的画布可用大小
- float trySize = maxTextSize;
- float scaled = getContext().getResources().getDisplayMetrics().scaledDensity;
- testPaint.setTextSize(trySize * scaled);// 模拟注意乘以scaled
- while ((trySize > minTextSize)
- && (testPaint.measureText(text) > availableWidth)) {
- trySize -= 2;
- FontMetrics fm = testPaint.getFontMetrics();
- float scaled1 = (float) (this.getHeight() / (Math
- .ceil(fm.descent - fm.top) + 2));
- float scaled2 = (float) ((testPaint.measureText(text) / availableWidth));
- if (scaled1 >= 1.75 & scaled1 >= scaled2) {// 注意1.75是三星s4 小米3
- // 的适合数值(当然包括我的联想了)
- break;
- }
- if (trySize <= minTextSize) {
- trySize = minTextSize;
- break;
- }
- testPaint.setTextSize(trySize * scaled);
- }
- this.setTextSize(trySize);// 等同于this.getPaint().set(trySize*scaled);
- }
- };
- @Override
- protected void onTextChanged(CharSequence text, int start, int before,
- int after) {
- super.onTextChanged(text, start, before, after);
- refitText(text.toString(), this.getWidth());
- }
- @Override
- protected void onSizeChanged(int w, int h, int oldw, int oldh) {
- if (w != oldw) {
- refitText(this.getText().toString(), w);
- }
- }
- }
然后直接在你的xml布局文件中这样使用:
- <com.allone.CTPMobile.component.edittext.AutoAdjustSizeEditText
- android:id="@+id/horiTakeOrderPrice"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:background="@drawable/selector_edit_bg"
- android:gravity="center|right"
- android:paddingLeft="34.0dip"
- android:paddingRight="4.0dip"
- android:textColor="@color/color_white_f0f0f0"
- android:textSize="10sp"
- android:text="888"
- android:focusable ="true"
- android:focusableInTouchMode="true"
- android:clickable="true"/
文章出自 CSDN: