In recent development projcet, one of my friends have encountered a case that she needed to create a input control for user to type in IP address. The screen layout is like this:
The following is the source code for the custom control. It basically contains 4 editText.
package com.easyinfogeek.view;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.easyinfogeek.R;
/**
* IP input control
*
* @author Shela
*
*
*/
public class IPEditText extends LinearLayout {
private EditText mFirstIP;
private EditText mSecondIP;
private EditText mThirdIP;
private EditText mFourthIP;
private String mText;
private String mText1;
private String mText2;
private String mText3;
private String mText4;
private SharedPreferences mPreferences;
public IPEditText(Context context, AttributeSet attrs) {
super(context, attrs);
/**
* Initialize
*/
View view = LayoutInflater.from(context).inflate(
R.layout.custom_my_edittext, this);
mFirstIP = (EditText)findViewById(R.id.ip_first);
mSecondIP = (EditText)findViewById(R.id.ip_second);
mThirdIP = (EditText)findViewById(R.id.ip_third);
mFourthIP = (EditText)findViewById(R.id.ip_fourth);
mPreferences = context.getSharedPreferences("config_IP",
Context.MODE_PRIVATE);
OperatingEditText(context);
}
/**
* Get the content of EditText.
* Whenever the EditText is filled with 3 digit, the cursor will move to next EditText.
*
*/
private void OperatingEditText(final Context context) {
mFirstIP.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
/**
* Whenever the EditText is filled with 3 digit, the cursor will move to next EditText.
*/
if (s != null && s.length() > 0) {
if (s.length() > 2 || s.toString().trim().contains(".")) {
if (s.toString().trim().contains(".")) {
mText1 = s.toString().substring(0, s.length() - 1);
mFirstIP.setText(mText1);
} else {
mText1 = s.toString().trim();
}
if (Integer.parseInt(mText1) > 255) {
Toast.makeText(context, "Please input valid IP address",
Toast.LENGTH_LONG).show();
return;
}
Editor editor = mPreferences.edit();
editor.putInt("IP_FIRST", mText1.length());
editor.commit();
mSecondIP.setFocusable(true);
mSecondIP.requestFocus();
}
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
mSecondIP.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
/**
* Check if the IP address is valid.
* set focus to next EditText.
*/
if (s != null && s.length() > 0) {
if (s.length() > 2 || s.toString().trim().contains(".")) {
if (s.toString().trim().contains(".")) {
mText2 = s.toString().substring(0, s.length() - 1);
mSecondIP.setText(mText2);
} else {
mText2 = s.toString().trim();
}
if (Integer.parseInt(mText2) > 255) {
Toast.makeText(context, "Please input valid IP address",
Toast.LENGTH_LONG).show();
return;
}
Editor editor = mPreferences.edit();
editor.putInt("IP_SECOND", mText2.length());
editor.commit();
mThirdIP.setFocusable(true);
mThirdIP.requestFocus();
}
}
/**
* When user deletes the input, set focus to previous EditText
*/
if (start == 0 && s.length() == 0) {
mFirstIP.setFocusable(true);
mFirstIP.requestFocus();
mFirstIP.setSelection(mPreferences.getInt("IP_FIRST", 0));
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
mThirdIP.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
/**
* Check if the IP address is valid.
* set focus to next EditText.
*/
if (s != null && s.length() > 0) {
if (s.length() > 2 || s.toString().trim().contains(".")) {
if (s.toString().trim().contains(".")) {
mText3 = s.toString().substring(0, s.length() - 1);
mThirdIP.setText(mText3);
} else {
mText3 = s.toString().trim();
}
if (Integer.parseInt(mText3) > 255) {
Toast.makeText(context, "Please input valid IP address",
Toast.LENGTH_LONG).show();
return;
}
Editor editor = mPreferences.edit();
editor.putInt("IP_THIRD", mText3.length());
editor.commit();
mFourthIP.setFocusable(true);
mFourthIP.requestFocus();
}
}
/**
* When user deletes the input, set focus to previous EditText
*/
if (start == 0 && s.length() == 0) {
mSecondIP.setFocusable(true);
mSecondIP.requestFocus();
mSecondIP.setSelection(mPreferences.getInt("IP_SECOND", 0));
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
mFourthIP.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
/**
* Check if the IP address is valid.
* set focus to next EditText.
*/
if (s != null && s.length() > 0) {
mText4 = s.toString().trim();
if (Integer.parseInt(mText4) > 255) {
Toast.makeText(context, "Please input valid IP address", Toast.LENGTH_LONG)
.show();
return;
}
Editor editor = mPreferences.edit();
editor.putInt("IP_FOURTH", mText4.length());
editor.commit();
}
/**
* When user deletes the input, set focus to previous EditText
*/
if (start == 0 && s.length() == 0) {
mSecondIP.setFocusable(true);
mSecondIP.requestFocus();
mSecondIP.setSelection(mPreferences.getInt("IP_THIRD", 0));
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
public String getText(Context context) {
if (TextUtils.isEmpty(mText1) || TextUtils.isEmpty(mText2)
|| TextUtils.isEmpty(mText3) || TextUtils.isEmpty(mText4)) {
Toast.makeText(context, "Please input valid IP address", Toast.LENGTH_LONG).show();
}
return mText1 + "." + mText2 + "." + mText3 + "." + mText4;
}
}
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