Edittext：错误已解决，然后在android中启用发送按钮
我有五个edittext字段，它们检查字段并在输入错误时限制某些数据，如下所示代码，但现在如果我在edittext中输入错误的数据，那么它会将信息输入数据库，所以如果有错误，我想要禁用按钮任何编辑文本。 错误可能在1到5个edittext中，它必须禁用发送按钮。 它必须仅在edittext字段中没有错误时启用发送按钮
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 nameValuePairs = new ArrayList(); 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(); }} 试试这种方式，希望这可以帮助您解决问题。
activity_subscribe.xml
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 nameValuePairs = new ArrayList (); 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 nameValuePairs){ new AsyncTask(){ @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(); } }