TextWatcher和InputFilter错误/非一致行为？

时间：2014-10-12 15:43:08

标签： android android-edittext textwatcher

基本问题

当我将InputFilter与TextWatcher合并时，我发现了一种奇怪的行为。 我基本上想要做的是帮助用户键入MAC地址。首先，我想在用户输入的每两个字符中添加一个分隔符（“：”）。 代码与我的香草Nexus 7一样正常工作，但是我的LG Optimus 4X HD（足够公平，它上面有一个夜间的Cyanogenmod），还有三星Galaxy S4的股票，有一种奇怪的行为。

代码

我将标识为EditText的{​​{1}}添加到空的项目和布局中，并将以下代码添加到我的活动中（自动生成的函数未复制）：

editText1

}

问题

我按下mutliple buttoms添加一些字符，然后尝试删除所有字符。 Nexus 7的日志（应该是）：

public class MainActivity extends Activity {
private static final String LOG_TAG = MainActivity.class.getSimpleName();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    EditText et = (EditText) this.findViewById(R.id.editText1);

    et.setInputType(InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
    et.addTextChangedListener(new TestTextWatcher());
    InputFilter[] inFi = { new InputFilter.LengthFilter(17),
            new TestInputFilter() };
    et.getText().setFilters(inFi);
}

private static class TestTextWatcher implements TextWatcher {

    private static final String regExp = "..(:..){5}";
    private static final Pattern pat = Pattern.compile(regExp);

    @Override
    public void afterTextChanged(Editable s) {
        Log.d(LOG_TAG, "AFTERTEXTCHANGED: " + s.toString());
        Matcher m = pat.matcher(s);
        // if does not match regexp
        if (!m.matches() && !m.hitEnd()) {
            SpannableStringBuilder ssb = new SpannableStringBuilder(s);
            Log.d(LOG_TAG, "remove " + ssb.toString());
            for (int i = 0; i < ssb.length(); i++) {
                char c = ssb.charAt(i);
                if (c == ':') {
                    ssb.delete(i, i + 1);
                    i--; // recheck same position
                }
            }

            Log.d(LOG_TAG, "insert " + ssb.toString());
            for (int i = 2; i < ssb.length(); i = i + 3) {
                ssb.insert(i, ":");
                Log.d(LOG_TAG, "Inserting: " + i + " " + ssb.toString());
            }

            Log.d(LOG_TAG, "trunc " + ssb.toString());
            if (ssb.length() > 17) {
                ssb.delete(17, ssb.length());
            }

            Log.d(LOG_TAG, "replace " + ssb.toString());
            s.replace(0, s.length(), ssb);
        }
    }

}

private static class TestInputFilter implements InputFilter {

    @Override
    public CharSequence filter(CharSequence source, int start, int end,
            Spanned dest, int dstart, int dend) {
        Log.d(LOG_TAG, "FILTER: source: " + source.toString() + " dest: "
                + dest.toString());
        // if character is deleted do nothing
        if (end - start == 0) {
            return null;
        }
        StringBuilder sb = new StringBuilder(dest.toString());
        sb.replace(dstart, dend, source.toString().substring(start, end));
        if ((sb.length() - 2) % 3 == 0 && sb.length() < 17) {
            SpannableStringBuilder sourceAsSpannableBuilder = new SpannableStringBuilder(
                    source);
            sourceAsSpannableBuilder = (SpannableStringBuilder) sourceAsSpannableBuilder
                    .subSequence(start, end);
            sourceAsSpannableBuilder.append(":");

            Log.d(LOG_TAG, "filter, spannable " + sourceAsSpannableBuilder.toString());
            return sourceAsSpannableBuilder;
        }
        return null;
    }
}

LG的输出：

10-12 17:18:36.336: D/MainActivity(9535): FILTER: source: s dest: 
10-12 17:18:36.336: D/MainActivity(9535): AFTERTEXTCHANGED: s
10-12 17:18:38.088: D/MainActivity(9535): FILTER: source: s dest: s
10-12 17:18:38.088: D/MainActivity(9535): filter, spannable s:
10-12 17:18:38.088: D/MainActivity(9535): AFTERTEXTCHANGED: ss:
10-12 17:18:38.508: D/MainActivity(9535): FILTER: source: s dest: ss:
10-12 17:18:38.508: D/MainActivity(9535): AFTERTEXTCHANGED: ss:s
10-12 17:18:38.778: D/MainActivity(9535): FILTER: source: s dest: ss:s
10-12 17:18:38.778: D/MainActivity(9535): filter, spannable s:
10-12 17:18:38.778: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:
10-12 17:18:39.079: D/MainActivity(9535): FILTER: source: s dest: ss:ss:
10-12 17:18:39.079: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:s
10-12 17:18:39.309: D/MainActivity(9535): FILTER: source: s dest: ss:ss:s
10-12 17:18:39.309: D/MainActivity(9535): filter, spannable s:
10-12 17:18:39.309: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:
10-12 17:18:39.539: D/MainActivity(9535): FILTER: source: s dest: ss:ss:ss:
10-12 17:18:39.539: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:s
10-12 17:18:39.729: D/MainActivity(9535): FILTER: source: s dest: ss:ss:ss:s
10-12 17:18:39.729: D/MainActivity(9535): filter, spannable s:
10-12 17:18:39.729: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:
10-12 17:18:39.930: D/MainActivity(9535): FILTER: source: s dest: ss:ss:ss:ss:
10-12 17:18:39.940: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:s
10-12 17:18:40.120: D/MainActivity(9535): FILTER: source: s dest: ss:ss:ss:ss:s
10-12 17:18:40.120: D/MainActivity(9535): filter, spannable s:
10-12 17:18:40.120: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:ss:
10-12 17:18:40.330: D/MainActivity(9535): FILTER: source: s dest: ss:ss:ss:ss:ss:
10-12 17:18:40.330: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:ss:s
10-12 17:18:40.630: D/MainActivity(9535): FILTER: source: s dest: ss:ss:ss:ss:ss:s
10-12 17:18:40.630: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:ss:ss
10-12 17:18:40.931: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:ss:ss:ss
10-12 17:18:41.241: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:ss:ss:ss
10-12 17:18:42.582: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:ss:ss:ss
10-12 17:18:42.582: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:ss:s
10-12 17:18:42.772: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:ss:ss:s
10-12 17:18:42.772: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:ss:
10-12 17:18:42.943: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:ss:ss:
10-12 17:18:42.953: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:ss
10-12 17:18:43.123: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:ss:ss
10-12 17:18:43.123: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:s
10-12 17:18:43.283: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:ss:s
10-12 17:18:43.283: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss:
10-12 17:18:43.473: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:ss:
10-12 17:18:43.473: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:ss
10-12 17:18:43.623: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:ss
10-12 17:18:43.623: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:s
10-12 17:18:43.793: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:s
10-12 17:18:43.793: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss:
10-12 17:18:43.974: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss:
10-12 17:18:43.974: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:ss
10-12 17:18:44.144: D/MainActivity(9535): FILTER: source:  dest: ss:ss:ss
10-12 17:18:44.144: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:s
10-12 17:18:44.314: D/MainActivity(9535): FILTER: source:  dest: ss:ss:s
10-12 17:18:44.314: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss:
10-12 17:18:44.484: D/MainActivity(9535): FILTER: source:  dest: ss:ss:
10-12 17:18:44.484: D/MainActivity(9535): AFTERTEXTCHANGED: ss:ss
10-12 17:18:44.644: D/MainActivity(9535): FILTER: source:  dest: ss:ss
10-12 17:18:44.644: D/MainActivity(9535): AFTERTEXTCHANGED: ss:s
10-12 17:18:44.814: D/MainActivity(9535): FILTER: source:  dest: ss:s
10-12 17:18:44.814: D/MainActivity(9535): AFTERTEXTCHANGED: ss:
10-12 17:18:44.985: D/MainActivity(9535): FILTER: source:  dest: ss:
10-12 17:18:44.995: D/MainActivity(9535): AFTERTEXTCHANGED: ss
10-12 17:18:45.125: D/MainActivity(9535): FILTER: source:  dest: ss
10-12 17:18:45.125: D/MainActivity(9535): AFTERTEXTCHANGED: s
10-12 17:18:45.305: D/MainActivity(9535): FILTER: source:  dest: s
10-12 17:18:45.305: D/MainActivity(9535): AFTERTEXTCHANGED: 
10-12 17:18:45.445: D/MainActivity(9535): FILTER: source:  dest:

我无法删除最后一个符号（“aa：”），因为没有调用afterTextChanged或filter。如果我移动光标并添加字符，我可以将其删除：

10-12 17:28:54.280: D/MainActivity(15778): FILTER: source: a dest: 
10-12 17:28:54.280: D/MainActivity(15778): AFTERTEXTCHANGED: a
10-12 17:28:54.680: D/MainActivity(15778): FILTER: source: a dest: a
10-12 17:28:54.690: D/MainActivity(15778): filter, spannable a:
10-12 17:28:54.690: D/MainActivity(15778): AFTERTEXTCHANGED: aa:
10-12 17:28:55.140: D/MainActivity(15778): FILTER: source: a dest: aa:
10-12 17:28:55.140: D/MainActivity(15778): AFTERTEXTCHANGED: aa:a
10-12 17:28:55.570: D/MainActivity(15778): FILTER: source: a dest: aa:a
10-12 17:28:55.570: D/MainActivity(15778): filter, spannable a:
10-12 17:28:55.570: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:
10-12 17:28:55.870: D/MainActivity(15778): FILTER: source: a dest: aa:aa:
10-12 17:28:55.870: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:a
10-12 17:28:56.140: D/MainActivity(15778): FILTER: source: a dest: aa:aa:a
10-12 17:28:56.140: D/MainActivity(15778): filter, spannable a:
10-12 17:28:56.140: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:
10-12 17:28:56.390: D/MainActivity(15778): FILTER: source: a dest: aa:aa:aa:
10-12 17:28:56.390: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:a
10-12 17:28:56.720: D/MainActivity(15778): FILTER: source: a dest: aa:aa:aa:a
10-12 17:28:56.720: D/MainActivity(15778): filter, spannable a:
10-12 17:28:56.730: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:
10-12 17:28:56.960: D/MainActivity(15778): FILTER: source: a dest: aa:aa:aa:aa:
10-12 17:28:56.960: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:a
10-12 17:28:57.210: D/MainActivity(15778): FILTER: source: a dest: aa:aa:aa:aa:a
10-12 17:28:57.210: D/MainActivity(15778): filter, spannable a:
10-12 17:28:57.210: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:aa:
10-12 17:28:57.460: D/MainActivity(15778): FILTER: source: a dest: aa:aa:aa:aa:aa:
10-12 17:28:57.460: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:aa:a
10-12 17:28:57.740: D/MainActivity(15778): FILTER: source: a dest: aa:aa:aa:aa:aa:a
10-12 17:28:57.740: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:aa:aa
10-12 17:28:58.040: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:aa:aa:aa
10-12 17:28:58.380: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:aa:aa:aa
10-12 17:28:59.160: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:aa:aa:aa
10-12 17:28:59.160: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:aa:a
10-12 17:28:59.360: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:aa:aa:a
10-12 17:28:59.360: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:aa:
10-12 17:28:59.530: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:aa:aa:
10-12 17:28:59.530: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:aa
10-12 17:28:59.680: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:aa:aa
10-12 17:28:59.680: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:a
10-12 17:28:59.830: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:aa:a
10-12 17:28:59.830: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa:
10-12 17:28:59.970: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:aa:
10-12 17:28:59.970: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:aa
10-12 17:29:00.100: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:aa
10-12 17:29:00.100: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:a
10-12 17:29:00.280: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:a
10-12 17:29:00.280: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa:
10-12 17:29:00.410: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa:
10-12 17:29:00.410: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:aa
10-12 17:29:00.550: D/MainActivity(15778): FILTER: source:  dest: aa:aa:aa
10-12 17:29:00.550: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:a
10-12 17:29:00.700: D/MainActivity(15778): FILTER: source:  dest: aa:aa:a
10-12 17:29:00.700: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:
10-12 17:29:00.860: D/MainActivity(15778): FILTER: source:  dest: aa:aa:
10-12 17:29:00.860: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa
10-12 17:29:01.000: D/MainActivity(15778): FILTER: source:  dest: aa:aa
10-12 17:29:01.000: D/MainActivity(15778): AFTERTEXTCHANGED: aa:a
10-12 17:29:01.150: D/MainActivity(15778): FILTER: source:  dest: aa:a
10-12 17:29:01.150: D/MainActivity(15778): AFTERTEXTCHANGED: aa:

Galaxy S4表现得更奇怪： 如果我按下ONE键，当添加了第一个分隔符时，它会添加所有写入的字符和按下的键：

10-12 17:30:13.600: D/MainActivity(15778): FILTER: source: a dest: aa:
10-12 17:30:13.610: D/MainActivity(15778): AFTERTEXTCHANGED: aaa:
10-12 17:30:13.610: D/MainActivity(15778): remove aaa:
10-12 17:30:13.610: D/MainActivity(15778): insert aaa
10-12 17:30:13.610: D/MainActivity(15778): Inserting: 2 aa:a
10-12 17:30:13.610: D/MainActivity(15778): trunc aa:a
10-12 17:30:13.610: D/MainActivity(15778): replace aa:a
10-12 17:30:13.610: D/MainActivity(15778): FILTER: source: aa:a dest: aaa:
10-12 17:30:13.610: D/MainActivity(15778): AFTERTEXTCHANGED: aa:a
10-12 17:30:13.940: D/MainActivity(15778): FILTER: source: a dest: aa:a
10-12 17:30:13.940: D/MainActivity(15778): filter, spannable a:
10-12 17:30:13.940: D/MainActivity(15778): AFTERTEXTCHANGED: aaa::a
10-12 17:30:13.940: D/MainActivity(15778): remove aaa::a
10-12 17:30:13.940: D/MainActivity(15778): insert aaaa
10-12 17:30:13.940: D/MainActivity(15778): Inserting: 2 aa:aa
10-12 17:30:13.940: D/MainActivity(15778): trunc aa:aa
10-12 17:30:13.940: D/MainActivity(15778): replace aa:aa
10-12 17:30:13.940: D/MainActivity(15778): FILTER: source: aa:aa dest: aaa::a
10-12 17:30:13.940: D/MainActivity(15778): filter, spannable aa:aa:
10-12 17:30:13.940: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa:
10-12 17:30:15.270: D/MainActivity(15778): FILTER: source:  dest: aa:aa:
10-12 17:30:15.280: D/MainActivity(15778): AFTERTEXTCHANGED: aa:aa
10-12 17:30:15.460: D/MainActivity(15778): FILTER: source:  dest: aa:aa
10-12 17:30:15.460: D/MainActivity(15778): AFTERTEXTCHANGED: aa:a
10-12 17:30:15.630: D/MainActivity(15778): FILTER: source:  dest: aa:a
10-12 17:30:15.630: D/MainActivity(15778): AFTERTEXTCHANGED: aa:
10-12 17:30:15.810: D/MainActivity(15778): FILTER: source:  dest: aa:
10-12 17:30:15.810: D/MainActivity(15778): AFTERTEXTCHANGED: aa
10-12 17:30:15.970: D/MainActivity(15778): FILTER: source:  dest: aa
10-12 17:30:15.970: D/MainActivity(15778): AFTERTEXTCHANGED: a
10-12 17:30:16.150: D/MainActivity(15778): FILTER: source:  dest: a
10-12 17:30:16.150: D/MainActivity(15778): AFTERTEXTCHANGED:

问题

我错过了什么吗？我是否使用了一个糟糕的“黑客”女巫在Nexus上工作，但在其他手机上却没有？ 或者基本上：为什么机器人的行为不同以及如何防止这种情况？

问候，

Fhnx

PS：很抱歉长篇文章。

0 个答案:

没有答案
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