问题
i have five edittext fields which is checking the fields and restricts some data when entered wrong as shown below code but now if i enter wrong data in edittext then it will enter the information into database so i want to disable the button if there are errors in any edittext . The error might be in 1 to 5 edittext it has to disable the send button. It has to only enable the send button when there are no errors in the edittext fields
public class MaINActivity extends Activity {
String result = null;
InputStream is = null;
String valid_email = null;
String valid_name = null;
String valid_last = null;
String valid_age = null;
String v5,v1,v2,v3,v4,v6;
String valid_confirm = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_subscribe);
final EditText editText = (EditText)findViewById(R.id.firstname);
final EditText editText1 = (EditText)findViewById(R.id.lastname);
final EditText editText2 = (EditText)findViewById(R.id.age1);
final EditText editText3 = (EditText)findViewById(R.id.email);
final EditText editText4 = (EditText)findViewById(R.id.confirm);
editText2.addTextChangedListener(new TextWatcher(){
@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) {
Is_Valid_Age(editText2);
}
private void Is_Valid_Age(EditText editText2) {
if(editText2.length() == 0 || editText2.equals("") || editText2 == null || "".equals(editText2.getText().toString())) {
valid_age = null;
}else {
valid_age = editText2.getText().toString();
}
}
});
editText1.addTextChangedListener(new TextWatcher(){
@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) {
Is_Valid_Last_Name(editText1);
}
private void Is_Valid_Last_Name(EditText editText1) throws NumberFormatException {
if (editText1.getText().toString().length() <= 0) {
editText1.setError("Accept Alphabets Only.");
valid_last = null;
} else if (!editText1.getText().toString().matches("[a-zA-Z ]+")) {
editText1.setError("Accept Alphabets Only.");
valid_last = null;
} else if(editText1.length() == 0 || editText1.equals("") || editText1 == null || "".equals(editText1.getText().toString())) {
valid_last = null;
}else {
valid_last = editText1.getText().toString();
}
}
});
editText.addTextChangedListener(new TextWatcher(){
@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) {
Is_Valid_First_Name(editText);
}
private void Is_Valid_First_Name(EditText editText) throws NumberFormatException {
if (editText.getText().toString().length() <= 0) {
editText.setError("Accept Alphabets Only.");
valid_name = null;
} else if (!editText.getText().toString().matches("[a-zA-Z ]+")) {
editText.setError("Accept Alphabets Only.");
valid_name = null;
} else if(editText.length() == 0 || editText.equals("") || editText == null || "".equals(editText.getText().toString())) {
valid_name = null;
}else {
valid_name = editText.getText().toString();
}
}
});
editText3.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
Is_Valid_Email_Address(editText3);
}
public void Is_Valid_Email_Address(EditText editText3) {
if (editText3.getText().toString() == null) {
editText3.setError("Invalid Email Address");
valid_email = null;
} else if (isEmailValid(editText3.getText().toString()) == false) {
editText3.setError("Invalid Email Address");
valid_email = null;
} else if(editText3.length() == 0 || editText3.equals("") || editText3 == null || "".equals(editText3.getText().toString())) {
valid_email = null;
}else {
valid_email = editText3.getText().toString();
}
}
});
editText4.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
Is_Valid_Confirm_Address(editText4);
}
public void Is_Valid_Confirm_Address(EditText editText4) {
if (editText4.getText().toString() == null) {
editText4.setError("Invalid Email Address");
valid_confirm = null;
} else if (isEmailValid(editText4.getText().toString()) == false) {
editText4.setError("Invalid Email Address");
valid_confirm = null;
} else if (editText4.getText().toString().equals(editText3.getText().toString())) {
valid_confirm = editText4.getText().toString();
} else if(editText4.length() == 0 || editText4.equals("") || editText4 == null || "".equals(editText4.getText().toString())) {
valid_confirm = null;
} else {
editText4.setError("Confirm Email is Not Matching");
valid_confirm = null;
}
}
});
Button send = (Button) findViewById(R.id.send);
send.setOnClickListener(new View.OnClickListener(){
@SuppressLint("NewApi")
@Override
public void onClick(View view) {
v1 = editText.getText().toString();
v2 = editText1.getText().toString();
v3 = editText2.getText().toString();
v4 = editText3.getText().toString();
v5 = editText4.getText().toString();
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("firstname",v1));
nameValuePairs.add(new BasicNameValuePair("lastname",v2));
nameValuePairs.add(new BasicNameValuePair("age",v3));
nameValuePairs.add(new BasicNameValuePair("email_address",v4));
nameValuePairs.add(new BasicNameValuePair("confirm_email_address",v5));
StrictMode.setThreadPolicy(policy);
try
{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("localhost/Android/Insert.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
Log.e("log_tag", "connection success ");
Toast.makeText(getApplicationContext(), "Subscription Successfull.Thank You for Subscribing you have now been added to our Mailing Lists", Toast.LENGTH_LONG).show();
}
catch(Exception e)
{
Log.e("log_tag", "Error in http connection "+e.toString());
Toast.makeText(getApplicationContext(), "Connection fail", Toast.LENGTH_SHORT).show();
}
try
{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
Intent i = new Intent(getBaseContext(),SecondActivity.class);
startActivity(i);
}
is.close();
result=sb.toString();
}
catch(Exception e)
{
Log.e("log_tag", "Error converting result "+e.toString());
}
try
{
JSONObject json_data = new JSONObject(result);
CharSequence w= (CharSequence) json_data.get("result");
Toast.makeText(getApplicationContext(), w, Toast.LENGTH_SHORT).show();
}
catch(JSONException e)
{
Log.e("log_tag", "Error parsing data "+e.toString());
Toast.makeText(getApplicationContext(), "JsonArray fail", Toast.LENGTH_SHORT).show();
}
}
});
}
private boolean isEmailValid(String email) {
return android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches();
}}
回答1:
Try this way,hope this will help you to solve your problem.
activity_subscribe.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
android:padding="5dp">
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:id="@+id/edtFirstName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="FirstName"
android:layout_marginTop="5dp"/>
<EditText
android:id="@+id/edtLastName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="LastName"
android:layout_marginTop="5dp"/>
<EditText
android:id="@+id/edtAge"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Age"
android:layout_marginTop="5dp"/>
<EditText
android:id="@+id/edtEmail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email"
android:inputType="textEmailAddress"
android:layout_marginTop="5dp"/>
<EditText
android:id="@+id/edtPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:hint="Password"
android:layout_marginTop="5dp"/>
<EditText
android:id="@+id/edtConfirmPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:hint="Confirm Password"
android:layout_marginTop="5dp"/>
</LinearLayout>
</ScrollView>
<Button
android:id="@+id/btnSubmit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Submit"/>
</LinearLayout>
SubscribeActivty.java
public class SubscribeActivty extends Activity {
InputStream is = null;
private EditText edtFirstName;
private EditText edtLastName;
private EditText edtAge;
private EditText edtEmail;
private EditText edtPassword;
private EditText edtConfirmPassword;
private Button btnSubmit;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_subscribe);
edtFirstName = (EditText) findViewById(R.id.edtFirstName);
edtLastName = (EditText) findViewById(R.id.edtLastName);
edtAge = (EditText) findViewById(R.id.edtAge);
edtEmail = (EditText) findViewById(R.id.edtEmail);
edtPassword = (EditText) findViewById(R.id.edtPassword);
edtConfirmPassword = (EditText) findViewById(R.id.edtConfirmPassword);
btnSubmit = (Button) findViewById(R.id.btnSubmit);
btnSubmit.setOnClickListener(new View.OnClickListener() {
@SuppressLint("NewApi")
@Override
public void onClick(View view) {
boolean isValid = true;
if (edtFirstName.getText().toString().length() <= 0) {
edtFirstName.setError("Value Required");
isValid = false;
} else if (!edtFirstName.getText().toString().matches("[a-zA-Z ]+")) {
edtFirstName.setError("Accept Alphabets Only.");
isValid = false;
}
if (edtLastName.getText().toString().length() <= 0) {
edtLastName.setError("Value Required");
isValid = false;
} else if (!edtLastName.getText().toString().matches("[a-zA-Z ]+")) {
edtLastName.setError("Accept Alphabets Only.");
isValid = false;
}
if (edtEmail.getText().toString().length() <= 0) {
edtEmail.setError("Value Required");
isValid = false;
} else if (!isEmailValid(edtEmail.getText().toString())) {
edtLastName.setError("Invalid Email.");
isValid = false;
}
if (edtAge.getText().toString().length() <= 0) {
edtAge.setError("Value Required");
isValid = false;
} else if (!edtAge.getText().toString().matches("[0-9 ]+")) {
edtAge.setError("Accept Numbers Only.");
isValid = false;
}
if (edtPassword.getText().toString().length() <= 0) {
edtPassword.setError("Value Required");
isValid = false;
}
if (edtConfirmPassword.getText().toString().length() <= 0) {
edtConfirmPassword.setError("Value Required");
isValid = false;
} else if (!edtConfirmPassword.getText().toString().equals(edtPassword.getText().toString())) {
edtConfirmPassword.setError("Password Mismatch.");
isValid = false;
}
if (isValid) {
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("firstname", edtFirstName.getText().toString()));
nameValuePairs.add(new BasicNameValuePair("lastname", edtLastName.getText().toString()));
nameValuePairs.add(new BasicNameValuePair("age", edtAge.getText().toString()));
nameValuePairs.add(new BasicNameValuePair("email", edtEmail.getText().toString()));
nameValuePairs.add(new BasicNameValuePair("password", edtPassword.getText().toString()));
submitDataOnServer(nameValuePairs);
}
}
});
}
public void submitDataOnServer(final ArrayList<NameValuePair> nameValuePairs){
new AsyncTask<Void,Void,String>(){
@Override
protected String doInBackground(Void... params) {
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("localhost/Android/Insert.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
Log.e("log_tag", "connection success ");
Toast.makeText(getApplicationContext(), "Subscription Successfull.Thank You for Subscribing you have now been added to our Mailing Lists", Toast.LENGTH_LONG).show();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection " + e.toString());
Toast.makeText(getApplicationContext(), "Connection fail", Toast.LENGTH_SHORT).show();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
return sb.toString();
} catch (Exception e) {
Log.e("log_tag", "Error converting result " + e.toString());
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
try {
JSONObject json_data = new JSONObject(result);
CharSequence w = (CharSequence) json_data.get("result");
Toast.makeText(getApplicationContext(), w, Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data " + e.toString());
Toast.makeText(getApplicationContext(), "JsonArray fail", Toast.LENGTH_SHORT).show();
}
}
}.execute();
}
public boolean isEmailValid(final String mailAddress) {
Pattern pattern;
Matcher matcher;
final String EMAIL_PATTERN = "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@" + "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
pattern = Pattern.compile(EMAIL_PATTERN);
matcher = pattern.matcher(mailAddress);
return matcher.matches();
}
}
来源：https://stackoverflow.com/questions/25009406/edittext-error-solved-then-enable-the-send-button-in-android