android - EditText setSelection 不适用于大于 8 的位置

Question

我正在使用代码用数组中的字符串填充 EditText View 。然后，我使用 .setSelection() 函数将光标移动到 View 的末尾，以便用户更轻松地向字符串追加字符。这适用于所有 8 个或更少字符的字符串。但是，如果数组中的字符串大于 8 个字符，我会收到以下错误消息:

java.lang.IndexOutOfBoundsException: setSpan (9 ... 9) ends beyond length 8

代码如下:

TransactionDataView = (EditText) findViewById(R.id.etTransactionData);
TransactionDataView.setText(TransactionData[TransactionDataIndex]);
TransactionDataView.setSelection(TransactionData[TransactionDataIndex].length());

从 LogCat 我可以看到数组下标是什么，字符串值和字符串的长度。在尝试设置选择后，我立即收到 IndexOutOfBoundsException。

06-14 10:18:52.244: D/DataEntry(706): TransactionDataIndex = 0
06-14 10:18:52.244: D/DataEntry(706): TransactionData = 123456789
06-14 10:18:52.244: D/DataEntry(706): TransactionData.Length = 9
06-14 10:18:52.244: W/dalvikvm(706): threadid=1: thread exiting with uncaught exception (group=0x42065438)
06-14 10:18:52.264: E/AndroidRuntime(706): FATAL EXCEPTION: main
06-14 10:18:52.264: E/AndroidRuntime(706): java.lang.IllegalStateException: Could not execute method of the activity
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.view.View$1.onClick(View.java:3674)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.view.View.performClick(View.java:4198)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.view.View$PerformClick.run(View.java:17164)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.os.Handler.handleCallback(Handler.java:615)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.os.Handler.dispatchMessage(Handler.java:92)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.os.Looper.loop(Looper.java:137)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.app.ActivityThread.main(ActivityThread.java:4918)
06-14 10:18:52.264: E/AndroidRuntime(706):  at java.lang.reflect.Method.invokeNative(Native Method)
06-14 10:18:52.264: E/AndroidRuntime(706):  at java.lang.reflect.Method.invoke(Method.java:511)
06-14 10:18:52.264: E/AndroidRuntime(706):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
06-14 10:18:52.264: E/AndroidRuntime(706):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
06-14 10:18:52.264: E/AndroidRuntime(706):  at dalvik.system.NativeStart.main(Native Method)
06-14 10:18:52.264: E/AndroidRuntime(706): Caused by: java.lang.reflect.InvocationTargetException
06-14 10:18:52.264: E/AndroidRuntime(706):  at java.lang.reflect.Method.invokeNative(Native Method)
06-14 10:18:52.264: E/AndroidRuntime(706):  at java.lang.reflect.Method.invoke(Method.java:511)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.view.View$1.onClick(View.java:3669)
06-14 10:18:52.264: E/AndroidRuntime(706):  ... 11 more
06-14 10:18:52.264: E/AndroidRuntime(706): Caused by: java.lang.IndexOutOfBoundsException: setSpan (9 ... 9) ends beyond length 8
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.text.SpannableStringBuilder.checkRange(SpannableStringBuilder.java:1016)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:592)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:588)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.text.Selection.setSelection(Selection.java:104)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.text.Selection.setSelection(Selection.java:115)
06-14 10:18:52.264: E/AndroidRuntime(706):  at android.widget.EditText.setSelection(EditText.java:108)
06-14 10:18:52.264: E/AndroidRuntime(706):  at com.worldgiftcard.mobileterminal.DataEntry.onClick(DataEntry.java:152)
06-14 10:18:52.264: E/AndroidRuntime(706):  ... 14 more

有没有人遇到过这个？这是Android代码中的错误吗？任何人都可以建议解决方法吗？

如有任何帮助，我们将不胜感激。谢谢。

Answer 1

尝试改变

TransactionDataView.setSelection(TransactionData[TransactionDataIndex].length());

到

TransactionDataView.setSelection(TransactionDataView.getText().length());