Android IP地址控件

ip地址控件写的很多，但是一调试有许多BUG，于是改良了一下。

初始化控件

private void initData(){        String ip = SharedPreferencesUtils.getValue(getBaseContext(), "sServerIp", "127.0.0.1");        int sServerPort = SharedPreferencesUtils.getValue(getBaseContext(), "sServerPort", 80);        String IP[] = ip.split("\\.");        firstIP.setText(IP[0]);        secondIP.setText(IP[1]);        thirdIP.setText(IP[2]);        fourthIP.setText(IP[3]);        port.setText(String.valueOf(sServerPort));    }

地址控件监听

public void setIPEditTextListener() {        //设置第一个字段的事件监听        firstIP.addTextChangedListener(new TextWatcher() {            @Override            public void onTextChanged(CharSequence s, int start, int before, int count) {                // TODO Auto-generated method stub                Log.i("test", s.toString());                int index = s.length();                if (null != s && index > 0) {                    if (index > 3) {//如果位数大于3，则直接下一个控件获取光标                        secondIP.setFocusable(true);                        secondIP.requestFocus();                    } else {//如果位数不大于3，则判断是否大于255,                        if (Integer.parseInt(s.toString()) > 255) {                            Toast.makeText(MainActivity.this, "IP大小在0-255之间",                                    Toast.LENGTH_LONG).show();                            return;                        }                        sFirstIP = s.toString().trim();                    }                } else {                    sFirstIP = "";//这一步必须写，否则无法更换最后一位数字                }            }            @Override            public void beforeTextChanged(CharSequence s, int start, int count,                                          int after) {                // TODO Auto-generated method stub            }            @Override            public void afterTextChanged(Editable s) {                // TODO Auto-generated method stub                firstIP.removeTextChangedListener(this);                firstIP.setText(sFirstIP);                firstIP.setSelection(firstIP.length());                firstIP.addTextChangedListener(this);            }        });        //设置第二个IP字段的事件监听        secondIP.addTextChangedListener(new TextWatcher() {            @Override            public void onTextChanged(CharSequence s, int start, int before, int count) {                // TODO Auto-generated method stub                int index = s.length();                if (null != s && index > 0) {                    if (index > 3) {                        thirdIP.setFocusable(true);                        thirdIP.requestFocus();                    } else {                        if (Integer.parseInt(s.toString()) > 255) {                            Toast.makeText(MainActivity.this, "IP大小在0-255之间",                                    Toast.LENGTH_LONG).show();                            return;                        }                        sSecondIP = s.toString().trim();                    }                } else {                    sSecondIP = "";                }            }            @Override            public void beforeTextChanged(CharSequence s, int start, int count,                                          int after) {                // TODO Auto-generated method stub            }            @Override            public void afterTextChanged(Editable s) {                // TODO Auto-generated method stub                secondIP.removeTextChangedListener(this);                secondIP.setText(sSecondIP);                secondIP.setSelection(secondIP.length());                secondIP.addTextChangedListener(this);            }        });        //设置第三个IP字段的事件监听        thirdIP.addTextChangedListener(new TextWatcher() {            @Override            public void onTextChanged(CharSequence s, int start, int before, int count) {                // TODO Auto-generated method stub                int index = s.length();                if (null != s && index > 0) {                    if (index > 3) {                        fourthIP.setFocusable(true);                        fourthIP.requestFocus();                    } else {                        if (Integer.parseInt(s.toString()) > 255) {                            Toast.makeText(MainActivity.this, "IP大小在0-255之间",                                    Toast.LENGTH_LONG).show();                            return;                        }                        sThirdIP = s.toString().trim();                    }                } else {                    sThirdIP = "";                }            }            @Override            public void beforeTextChanged(CharSequence s, int start, int count,                                          int after) {                // TODO Auto-generated method stub            }            @Override            public void afterTextChanged(Editable s) {                // TODO Auto-generated method stub                thirdIP.removeTextChangedListener(this);                thirdIP.setText(sThirdIP);                thirdIP.setSelection(thirdIP.length());                thirdIP.addTextChangedListener(this);            }        });        //设置第四个IP字段的事件监听        fourthIP.addTextChangedListener(new TextWatcher() {            @Override            public void onTextChanged(CharSequence s, int start, int before, int count) {                // TODO Auto-generated method stub                int index = s.length();                if (null != s && index > 0) {                    if (index > 3) {                        port.setFocusable(true);                        port.requestFocus();                    } else {//如果                        if (Integer.parseInt(s.toString()) > 255) {                            Toast.makeText(MainActivity.this, "请输入合法的ip地址", Toast.LENGTH_LONG)                                    .show();                            return;                        }                        sFourthIP = s.toString().trim();                    }                } else {                    sFourthIP = "";                }            }            @Override            public void beforeTextChanged(CharSequence s, int start, int count,                                          int after) {                // TODO Auto-generated method stub            }            @Override            public void afterTextChanged(Editable s) {                // TODO Auto-generated method stub                fourthIP.removeTextChangedListener(this);                fourthIP.setText(sFourthIP);//最终的取值                fourthIP.setSelection(fourthIP.length());//设置全选                fourthIP.addTextChangedListener(this);            }        });    }

下面是布局文件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <TextView        android:id="@+id/activity_ip_setting_title_bar"        android:layout_width="match_parent"        android:layout_height="50dp"        android:text="IP设置"        android:textSize="30sp"        android:gravity="center"        android:textColor="@color/white"        android:background="#499bf7"/>    <LinearLayout         android:id="@+id/layout"         android:layout_below="@+id/activity_ip_setting_title_bar"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_marginLeft="20dp"         android:layout_marginRight="20dp"         android:layout_marginTop="10dp"         android:gravity="center|left"         android:orientation="vertical">         <TextView             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:textSize="18sp"             android:text="IP地址"/>         <LinearLayout             android:layout_width="match_parent"             android:layout_height="40dp"             android:layout_marginTop="10dp"             android:gravity="bottom"             android:background="@drawable/login_input_bg">             <EditText                 android:id="@+id/firstIPfield"                 android:layout_width="0dp"                 android:layout_height="match_parent"                 android:layout_weight="1"                 android:gravity="center"                 android:background="@null"                 android:maxLength="4"                 android:inputType="number"/>             <TextView                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="."/>             <EditText                 android:id="@+id/secondIPfield"                 android:layout_width="0dp"                 android:layout_height="match_parent"                 android:layout_weight="1"                 android:gravity="center"                 android:background="@null"                 android:maxLength="4"                 android:inputType="number"/>             <TextView                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="."/>             <EditText                 android:id="@+id/thirdIPfield"                 android:layout_width="0dp"                 android:layout_height="match_parent"                 android:layout_weight="1"                 android:gravity="center"                 android:background="@null"                 android:maxLength="4"                 android:inputType="number"/>             <TextView                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="."/>             <EditText                 android:id="@+id/fourthIPfield"                 android:layout_width="0dp"                 android:layout_height="match_parent"                 android:layout_weight="1"                 android:gravity="center"                 android:background="@null"                 android:maxLength="4"                 android:inputType="number"/>         </LinearLayout>         <TextView             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:text="端口"             android:textSize="18sp"             android:layout_marginTop="10dp"/>         <EditText             android:id="@+id/activity_ip_setting_input_port"             android:layout_width="match_parent"             android:layout_height="40dp"             android:layout_marginTop="5dp"             android:paddingLeft="10dp"             android:background="@drawable/login_input_bg"             android:inputType="number"/>     </LinearLayout>    <Button        android:id="@+id/button"        android:layout_below="@+id/layout"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_margin="20dp"        android:text="保存"/></RelativeLayout>