Question

我使用此方法收缩TextView文字，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;
}

我只能使用这些设备进行堆栈溢出（有时候它不会发生）：

Samsung 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()内调用此函数，是的，这可能是问题，但我们的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（滚动以阅读所有日志）：

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出现此异常？

Answer 1

我认为你应该对文本化进行数学运算，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。

Answer 2

我找到了解决方案，或者说接缝，这很奇怪也很奇怪。所以我注意到我正在调试一些奇怪的事情（因为我第一次可以重现这个错误）：

我注意到文本“绿色”时文本被“解析得好”：

但有时候文字不是“绿色”，特别是如果文字像“...... / ......”那样......：

这导致StackOverflow，因为TextUtils.ellipsize没有返回，调试器也有点奇怪。

更改此内容：

CharSequence text = textView.getText();

对此：

CharSequence text = textView.getText().toString();

解决方案。
现在它正在发挥作用。感谢IntelliJ成为有史以来最好的IDE：）

使用while循环的Android stackoverflow

2 个答案: