我实现addTextChangedListener时遇到错误，我该如何解决？

时间：2014-03-13 20:31:08

标签： java android keylistener

我创建了EditText并将其设置为 addtextchangedlistener 。 代码是：

 shared_tags.addTextChangedListener(new TextWatcher() {


    @Override
    public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
        // TODO Auto-generated method stub
        shared_tags.setText( shared_tags.getText().toString().toLowerCase().replace(" ", "#"));
    }

    @Override
    public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
            int arg3) {
        // TODO Auto-generated method stub

    }

    @Override
    public void afterTextChanged(Editable arg0) {
        // TODO Auto-generated method stub

    }
});

但它给出了以下错误：

03-13 23:22:03.384: E/InputEventReceiver(19895): Exception dispatching input event.
03-13 23:22:03.384: E/MessageQueue-JNI(19895): Exception in MessageQueue callback: handleReceiveCallback
03-13 23:22:03.424: E/MessageQueue-JNI(19895): java.lang.StackOverflowError
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.graphics.Paint.getTextRunAdvances(Paint.java:1754)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.graphics.Paint.getTextRunAdvances(Paint.java:1720)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.text.MeasuredText.addStyleRun(MeasuredText.java:172)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.text.MeasuredText.addStyleRun(MeasuredText.java:212)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.text.StaticLayout.generate(StaticLayout.java:325)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.text.DynamicLayout.reflow(DynamicLayout.java:284)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.text.DynamicLayout.<init>(DynamicLayout.java:170)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.makeSingleLayout(TextView.java:6314)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.makeNewLayout(TextView.java:6208)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.checkForRelayout(TextView.java:6755)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3923)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.424: E/MessageQueue-JNI(19895):  at android.wid
03-13 23:22:03.424: D/AndroidRuntime(19895): Shutting down VM
03-13 23:22:03.424: W/dalvikvm(19895): threadid=1: thread exiting with uncaught exception (group=0x4132fac8)
03-13 23:22:03.434: E/AndroidRuntime(19895): FATAL EXCEPTION: main
03-13 23:22:03.434: E/AndroidRuntime(19895): java.lang.StackOverflowError
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.graphics.Paint.getTextRunAdvances(Paint.java:1754)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.graphics.Paint.getTextRunAdvances(Paint.java:1720)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.text.MeasuredText.addStyleRun(MeasuredText.java:172)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.text.MeasuredText.addStyleRun(MeasuredText.java:212)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.text.StaticLayout.generate(StaticLayout.java:325)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.text.DynamicLayout.reflow(DynamicLayout.java:284)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.text.DynamicLayout.<init>(DynamicLayout.java:170)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.makeSingleLayout(TextView.java:6314)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.makeNewLayout(TextView.java:6208)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.checkForRelayout(TextView.java:6755)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3923)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3781)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.EditText.setText(EditText.java:99)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3756)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at com.wub.twostrangers.share_image$3.onTextChanged(share_image.java:236)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.sendOnTextChanged(TextView.java:7584)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3926)
03-13 23:22:03.434: E/AndroidRuntime(19895):    at android.widget.TextView.setText(TextView.java:3

我的布局xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

<EditText
            android:id="@+id/shared_tags"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:hint="@string/prompt_shared_tags"
            android:singleLine="true"  
            android:maxLength="70" 
            />



</RelativeLayout>

当我删除addtextchangedlistener时，它可以工作，如果我想把它写回我的edittext，它会给出这个错误

（回答后）

我编辑了我的问题，我理解了这个问题，我想让我的编辑框的keylistener检测到用户按下空格，但是当用户立即按空格键时我想要替换，但是当我在我的编辑框上设置文本时它将是递归的，我该如何解决？**

我该如何解决？

感谢

1 个答案:

答案 0 :(得分：1)

我通过这样做解决了我的问题 - 修改你的onTextChangedMethod如下（原因如下）：

@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
    String str = shared_tags.getText().toString();
    if(!str.equals(""))
        shared_tags.setText("");
    // If you want to do something else - do it here
    // Not sure if this will work to identify space - never tried it
    if(!str.contains(" ")) // if this doesn't work try KeyEvent's getAction() method 
        shared_tags.setText("Whatever you want");
}

这背后的原因有点奇怪（可能是一个错误） - 当没有输入任何文本时，onTextChangedMethod（）继续调用自身，虽然它什么都不做，但连续调用自身会导致堆栈溢出并抛出此错误。由于onTextChanged（）方法，无限递归是原因。如果你调试，你会看到这个。

编辑：在您更新的日志中，您可以看到我刚刚说过的内容。您的sendOnTextChanged（）方法将被重复调用。

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