Question

我正在尝试添加键盘监听器......

txta1cresult.setOnEditorActionListener(new OnEditorActionListener() {
    public boolean onEditorAction(TextView v,int actionId, KeyEvent event) {
        if(actionId==EditorInfo.IME_ACTION_DONE){
            calculate();
        }
    return false;
    }
});

但是，我收到以下编译错误......

/home/jocala/hba1c/src/com/android/hba1c.java:82: cannot find symbol
symbol  : class OnEditorActionListener
location: class com.jocala.hba1c.hba1c
txta1cresult.setOnEditorActionListener(new OnEditorActionListener() {

这是我的EditText ...

<EditText
    android:id="@+id/txta1cresult"
    android:inputType="numberDecimal"
    android:layout_width="80px"
    android:maxLength="5"
    android:layout_height="40px"
    android:textSize="18sp"
    android:layout_x="200px"
    android:layout_y="32px"
    >
</EditText>

我是否需要导入EditText和TextView以外的内容？这里有什么不对吗？

 [javac] Compiling 3 source files to /home/jeff/hba1c/bin/classes
  [javac] /home/jeff/hba1c/src/com/android/hba1c.java:83: cannot find symbol
  [javac] symbol: class KeyEvent
  [javac]     public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
     [javac]                                                       ^
[javac] /home/jeff/hba1c/src/com/android/hba1c.java:84: cannot find symbol
[javac] symbol: variable EditorInfo
[javac]         if(actionId==EditorInfo.IME_ACTION_DONE){
[javac]                      ^
[javac] 2 errors

修复导入后剩余2个错误：

[javac] Compiling 2 source files to /home/jeff/hba1c/bin/classes
[javac] /home/jeff/hba1c/src/com/android/hba1c.java:161: cannot find symbol
[javac] symbol: class KeyEvent
[javac]     public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
[javac]                                                             ^
[javac] /home/jeff/hba1c/src/com/android/hba1c.java:162: cannot find symbol
[javac] symbol: variable EditorInfo
[javac]         if(actionId==EditorInfo.IME_ACTION_DONE){
[javac]                      ^
[javac] 2 errors

似乎扼杀了这段代码：

public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
    if(actionId==EditorInfo.IME_ACTION_DONE){
        calculate();
    }

最后修正：

import android.view.KeyEvent; import android.view.inputmethod.EditorInfo;

谢谢！

Answer 1

您似乎需要导入TextView.OnEditorActionListener

相关地，请注意KeyEvent参数。如果操作是由Enter键触发的（听起来像你想要做的那样），它将在该参数中。您可以尝试而不是从int参数中收集它。

Answer 2

您需要在代码中导入android.widget.TextView.OnEditorActionListener。

或者，改变你的听众......

txta1cresult.setOnEditorActionListener(new OnEditorActionListener() {

到此......

txta1cresult.setOnEditorActionListener(new TextView.OnEditorActionListener() {

你得到的编译器错误基本上是说不知道OnEditorActionListener是什么，所以你需要导入它。

Android数字键盘

2 个答案: