Android实现IP地址输入框的方法示例代码

<LinearLayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content" 

 <LinearLayout
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_marginLeft="10dp"
 android:layout_marginTop="6dp"
 android:layout_weight="4"
 android:background="@drawable/ip_input_shape" 

 <EditText
  android:id="@+id/IP_1"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:background="@null"
  android:gravity="center_horizontal"
  android:inputType="number"　　//输入类型
  android:lines="1"　　　　
  android:maxLength="3"　　　　//最多三个
  android:textSize="24sp"
  android:imeOptions="actionNext"/ 

 <TextView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:gravity="bottom"
  android:text="." / 

 <EditText
  android:id="@+id/IP_2"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:background="@null"
  android:gravity="center_horizontal"
  android:inputType="number"
  android:lines="1"
  android:maxLength="3"
  android:textSize="24sp"
  android:imeOptions="actionNext"/ 

 <TextView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="." / 

 <EditText
  android:id="@+id/IP_3"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:background="@null"
  android:gravity="center_horizontal"
  android:inputType="number"
  android:lines="1"
  android:maxLength="3"
  android:textSize="24sp"
  android:imeOptions="actionNext"/ 

 <TextView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="." / 

 <EditText
  android:id="@+id/IP_4"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:background="@null"
  android:gravity="center_horizontal"
  android:inputType="number"
  android:lines="1"
  android:maxLength="3"
  android:textSize="24sp"
  android:imeOptions="actionNext"/ 
 </LinearLayout 

 <Button
 android:id="@+id/Save_Ip"
 android:layout_width="0dp"
 android:layout_height="wrap_content"
 android:layout_weight="2"
 android:text="Save" / 

 </LinearLayout 

public class SystemConfig extends AppCompatActivity implements View.OnClickListener {
private DrawerLayout configbar;
private SharedPreferences.Editor editor;
private EditText ip_1;
private EditText ip_2;
private EditText ip_3;
private EditText ip_4;
private Button save_ip_btn;
String[] IP_List = null;
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.Save_Ip:
if (ip_1.getText().length() == 0 || ip_2.getText().length() == 0 || ip_3.getText().length() == 0 || ip_4.getText().length() == 0) {
Toast.makeText(this, "IP地址不正确！", Toast.LENGTH_SHORT).show();
break;
}
String IP_result = ip_1.getText() + "." + ip_2.getText() + "." + ip_3.getText() + "." + ip_4.getText();
editor.putString("DB_IP", IP_result);
editor.apply();
Toast.makeText(this, "保存成功！", Toast.LENGTH_SHORT).show();
break;
default:
break;
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.system_config);
SharedPreferences preferences = getSharedPreferences("System_Config", MODE_PRIVATE);
editor = preferences.edit();
ip_1 = (EditText) findViewById(R.id.IP_1);
ip_2 = (EditText) findViewById(R.id.IP_2);
ip_3 = (EditText) findViewById(R.id.IP_3);
ip_4 = (EditText) findViewById(R.id.IP_4);
save_ip_btn = (Button) findViewById(R.id.Save_Ip);
save_ip_btn.setOnClickListener(this);
TextChangeListen[] mTextWatcher = new TextChangeListen[4];
EditText[] editTexts_List = new EditText[4];
editTexts_List[0] = ip_1;
editTexts_List[1] = ip_2;
editTexts_List[2] = ip_3;
editTexts_List[3] = ip_4;
　　　　 //循环添加监听事件
for (int i = 0; i < 4; i++) {
mTextWatcher[i] = new TextChangeListen(editTexts_List[i]);
editTexts_List[i].addTextChangedListener(mTextWatcher[i]);
}
boolean zhaji = preferences.getBoolean("IsZhaJi", false);
String Data_IP = preferences.getString("DB_IP", "192.168.0.118");
IP_List = Data_IP.split("\\.");
ip_1.setText(IP_List[0]);
ip_2.setText(IP_List[1]);
ip_3.setText(IP_List[2]);
ip_4.setText(IP_List[3]);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
break;
default:
break;
}
return true;
}
public class TextChangeListen implements TextWatcher {
public EditText IP_Edit;
public TextChangeListen(EditText IP_Edit) {
super();
this.IP_Edit = IP_Edit;
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
if (s.length() == 3) {
if (Integer.parseInt(s.toString()) <= 255) {
if (this.IP_Edit == ip_1) {
ip_2.requestFocus();
}
if (this.IP_Edit == ip_2) {
ip_3.requestFocus();
}
if (this.IP_Edit == ip_3) {
ip_4.requestFocus();
}
} else {
Toast.makeText(SystemConfig.this, "IP格式不正确！", Toast.LENGTH_SHORT).show();
this.IP_Edit.setText("0");
}
} else if (s.length() == 0) {
if (this.IP_Edit == ip_1) {
ip_1.setText("0");
}
if (this.IP_Edit == ip_2) {
ip_1.requestFocus();
ip_2.setText("0");
}
if (this.IP_Edit == ip_3) {
ip_2.requestFocus();
ip_3.setText("0");
}
if (this.IP_Edit == ip_4) {
ip_3.requestFocus();
ip_4.setText("0");
}
}
}
}
}