java – 使用while循环的Android stackoverflow

我正在使用此方法缩小TextView文本,因为它的名字暗示：

public static float shrinkTextToFit(String caller,float availableWidth,TextView textView,float startingTextSize,float minimumTextSize) {
    startingTextSize = textView.getTextSize() < startingTextSize ? textView.getTextSize() : startingTextSize;
    Log.i("123","=========================");
    Log.i("123",caller + " called shrinkTextToFit");
    CharSequence text = textView.getText();
    float textSize = startingTextSize;
    textView.setTextSize(startingTextSize);
    while (!TextUtils.equals(text,(TextUtils.ellipsize(text,textView.getPaint(),availableWidth,TextUtils.TruncateAt.END)))) {
        textSize -= 2;
        Log.i("123","textSize: " + textSize);
        if ((textSize <= minimumTextSize) || (textSize <= 0)) {
            break;
        } else {
            textView.setTextSize(textSize);
        }
    }
    return textSize;
}

而且我只有这些设备有堆栈溢出(有时候不会发生)：

>三星GT-I9192
>三星GT-I9300
> LG-​​D290

操作系统版本：4.4.2,4.3

10  at android.widget.TextView.sendAfterTextChanged(TextView.java:8503)
11  at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:10633)
12  at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:970)
13  at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:497)
14  at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:247)
15  at android.text.TextUtils.ellipsize(TextUtils.java:1185)
16  at android.text.TextUtils.ellipsize(TextUtils.java:1079)
17  at android.text.TextUtils.ellipsize(TextUtils.java:1054)
18  at app.utils.Utils.float shrinkTextToFit(float,android.widget.TextView,float,float)

我在TextWatcher afterTextChanged()中调用了这个函数,并且可能是问题,但是想法是在插入文本时缩小文本大小.

@Override
public void afterTextChanged(Editable s) {
    mEditText.removeTextChangedListener(mTextWatcher);
    Utils.shrinkTextToFit("watcher",mAvailableWidth,mEditText,50,10);
    mEditText.addTextChangedListener(mTextWatcher);
}

示例日志：

开始输入字母(滚动阅读所有日志)：

08-01 14:48:50.284    watcher called shrinkTextToFit
08-01 14:48:50.676    =========================
08-01 14:48:50.677    watcher called shrinkTextToFit
08-01 14:48:51.749    =========================
08-01 14:48:51.749    watcher called shrinkTextToFit
08-01 14:48:51.749    textSize: 48.0
08-01 14:48:51.750    textSize: 46.0
08-01 14:48:51.751    textSize: 44.0
08-01 14:48:51.752    textSize: 42.0
08-01 14:48:52.500    =========================
08-01 14:48:52.501    watcher called shrinkTextToFit
08-01 14:48:52.501    textSize: 48.0
08-01 14:48:52.501    textSize: 46.0
08-01 14:48:52.501    textSize: 44.0
08-01 14:48:52.501    textSize: 42.0
08-01 14:48:52.501    textSize: 40.0
08-01 14:48:52.503    textSize: 38.0
08-01 14:48:52.504    textSize: 36.0
08-01 14:48:53.013    =========================
08-01 14:48:53.013    watcher called shrinkTextToFit
08-01 14:48:53.013    textSize: 48.0
08-01 14:48:53.013    textSize: 46.0
08-01 14:48:53.013    textSize: 44.0
08-01 14:48:53.014    textSize: 42.0
08-01 14:48:53.015    textSize: 40.0
08-01 14:48:53.015    textSize: 38.0
08-01 14:48:53.015    textSize: 36.0
08-01 14:48:53.016    textSize: 34.0
08-01 14:48:53.017    textSize: 32.0
08-01 14:48:53.020    textSize: 30.0
08-01 14:48:59.948    =========================
08-01 14:48:59.949    watcher called shrinkTextToFit
08-01 14:48:59.949    textSize: 48.0
08-01 14:48:59.949    textSize: 46.0
08-01 14:48:59.949    textSize: 44.0
08-01 14:48:59.949    textSize: 42.0
08-01 14:48:59.950    textSize: 40.0
08-01 14:48:59.950    textSize: 38.0
08-01 14:48:59.950    textSize: 36.0
08-01 14:48:59.950    textSize: 34.0
08-01 14:48:59.951    textSize: 32.0
08-01 14:48:59.951    textSize: 30.0
08-01 14:48:59.951    textSize: 28.0

开始删除字母：

08-01 14:48:59.953    =========================
08-01 14:48:59.953    watcher called shrinkTextToFit
08-01 14:48:59.954    textSize: 48.0
08-01 14:48:59.954    textSize: 46.0
08-01 14:48:59.954    textSize: 44.0
08-01 14:48:59.954    textSize: 42.0
08-01 14:48:59.954    textSize: 40.0
08-01 14:48:59.954    textSize: 38.0
08-01 14:48:59.954    textSize: 36.0
08-01 14:48:59.954    textSize: 34.0
08-01 14:48:59.954    textSize: 32.0
08-01 14:48:59.954    textSize: 30.0
08-01 14:49:00.116    =========================
08-01 14:49:00.116    watcher called shrinkTextToFit
08-01 14:49:00.116    textSize: 48.0
08-01 14:49:00.117    textSize: 46.0
08-01 14:49:00.117    textSize: 44.0
08-01 14:49:00.117    textSize: 42.0
08-01 14:49:00.117    textSize: 40.0
08-01 14:49:00.117    textSize: 38.0
08-01 14:49:00.117    textSize: 36.0
08-01 14:49:00.121    =========================
08-01 14:49:00.121    watcher called shrinkTextToFit
08-01 14:49:00.121    textSize: 48.0
08-01 14:49:00.121    textSize: 46.0
08-01 14:49:00.121    textSize: 44.0
08-01 14:49:00.121    textSize: 42.0
08-01 14:49:00.284    =========================
08-01 14:49:00.284    watcher called shrinkTextToFit
08-01 14:49:00.288    =========================
08-01 14:49:00.288    watcher called shrinkTextToFit
08-01 14:49:00.444    =========================

我做错了什么？如何改进此解决方案以防止此异常？

解决方法

我认为你应该为textsize做数学运算,并运行你的setTextSize一次.

即使您使用某种临时视图来进行工作,也要从中获取大小.而不是使用eventlistener调用视图.