Question

我正在尝试使用自定义edittext让用户输入IP地址。它只允许最多255和3个周期的值，并且它在纵向上工作正常但在横向视图中显示软键盘时，只显示其中一个周期。在任一方向正确输入IP地址，并且在横向移除键盘后，edittext正确显示IP地址。

有什么想法吗？我希望用户在输入时看到IP地址，而不仅仅是键盘被移除时。

public class IPAddressKeyListener extends NumberKeyListener {

private char[] mAccepted;
private static IPAddressKeyListener sInstance;

@Override
protected char[] getAcceptedChars() {
    return mAccepted;
}

private static final char[] CHARACTERS =
        new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.' };

private IPAddressKeyListener() {
    mAccepted = CHARACTERS;
}

public static IPAddressKeyListener getInstance() {
    if (sInstance != null) return sInstance;

    sInstance = new IPAddressKeyListener();
    return sInstance;
}

/**
 * Display a number-only soft keyboard.
 */
public int getInputType() {
    return InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_DECIMAL;
}

 public CharSequence filter(CharSequence source, int start, int end, Spanned dest, 
         int dstart,int dend) {

     if (end > start) {
         String destTxt = dest.toString();
         String resultingTxt = destTxt.substring(0, dstart)
                 + source.subSequence(start, end)
                 + destTxt.substring(dend);
         if (!resultingTxt.matches("^\\d{1,3}(\\.(\\d{1,3}(\\.(\\d{1,3}(\\.(\\d{1,3})?)?)?)?)?)?")) {
            return "";
         } else {
             String[] splits = resultingTxt.split("\\.");
             for (int i=0; i<splits.length; i++) {
                 if (Integer.parseInt(splits[i]) > 255){
                     return "";
                 }
             }
         }
     }
 return null;
}

测试活动

public class MainActivity extends Activity {
Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final EditText edAddress = (EditText) findViewById(R.id.IPAddress);
    edAddress.setKeyListener(IPAddressKeyListener.getInstance());

    btn = (Button) findViewById(R.id.button1);
    btn.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            btn.setText(edAddress.getText());
        }
    });     
}

布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<EditText
    android:id="@+id/IPAddress"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="numberDecimal"/>

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/IPAddress"
    android:layout_below="@+id/IPAddress"
    android:text="IPAddress" />

软键盘在横向打开时未显示的时段

0 个答案: