java - editText setOnFocusChangeListener 错误

Question

尝试使用 setOnFocusChangeListener

mMessageBox.setOnFocusChangeListener(new OnFocusChangeListener() {

    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        // TODO Auto-generated method stub

    }
});

但是当我在 onCreate 函数中使用这个函数时，eclipse 给出了如下错误

Multiple markers at this line
    - The method setOnFocusChangeListener(View.OnFocusChangeListener) in the type View is not applicable for the arguments (new 
     OnFocusChangeListener(){})
    - OnFocusChangeListener cannot be resolved to a type

是因为我在 list 文件中使用的最小 sdk 吗？我在 list 文件中的 sdk 选项是

<uses-sdk
    android:minSdkVersion="9"
    android:targetSdkVersion="17" />

Answer 1

编译器已经说了

new View.OnFocusChangeListener() {
...
}

重点是View。