Hai我对android开发很新。我试图在我的申请中验证血型（AB + OR AB-或A + OR A-或B + OR B-或O + OR-）和出生数据（DD / MM / YYY）。如何编写代码以验证血型和出生日期。以下是我的代码;
Main activity:-
package com.example.uniqval.registration;
import android.content.ContentValues;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button mSubmit;
private Button mCancel;
private EditText mname;
private EditText dob;
private EditText mUsername;
private EditText mPassword;
private EditText mEmail;
private EditText mphone;
private EditText maddress;
private EditText mbloodgroup;
private EditText memergencycontactno1;
private EditText memergencycontactno2;
// private Spinner mGender;
// private String Gen;
protected DBHelper DB = new DBHelper(MainActivity.this);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
0
}
@Override
protected void onResume() {
super.onResume();
mSubmit = (Button)findViewById(R.id.submit);
mSubmit.setOnClickListener(this);
mCancel = (Button)findViewById(R.id.cancel);
mCancel.setOnClickListener(this);
mname = (EditText)findViewById(R.id.efname);
dob = (EditText)findViewById(R.id.dob);
mUsername = (EditText)findViewById(R.id.reuname);
mPassword = (EditText)findViewById(R.id.repass);
mEmail = (EditText)findViewById(R.id.eemail);
mphone=(EditText)findViewById(R.id.pphoneno);
maddress=(EditText)findViewById(R.id.paddress);
mbloodgroup=(EditText)findViewById(R.id.pbldgrp);
memergencycontactno1=(EditText)findViewById(R.id.pemc1);
memergencycontactno2=(EditText)findViewById(R.id.pemc2);
// mGender = (Spinner)findViewById(R.id.spinner1);
// Spinner method to read the on selected value
/* ArrayAdapter<State> spinnerArrayAdapter = new ArrayAdapter<State>(this,
android.R.layout.simple_spinner_item, new State[] {
new State("Male"),
new State("Female")});
mGender.setAdapter(spinnerArrayAdapter);
mGender.setOnItemSelectedListener(this);*/
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.cancel:
Toast.makeText(getApplicationContext(), "registration cancelled", Toast.LENGTH_SHORT).show();
break;
case R.id.submit:
if(!validateName())
{
return;
}
if(!validateDOB())
{
return;
}
if(!validateUserName())
{
return;
}
if(!validatePassword())
{
return;
}
if(!validateEmail())
{
return;
}
if(!validatePhoneNumber())
{
return;
}
if(!validateAddress())
{
return;
}
if(!validateBloodGr())
{
return;
}
if(!validateContact1())
{
return;
}
if(!validateContact2())
{
return;
}
addEntry(mname.getText().toString(), dob.getText().toString(), mUsername.getText().toString(), mPassword.getText().toString(),
mEmail.getText().toString(), mphone.getText().toString(),maddress.getText().toString(),mbloodgroup.getText().toString(),
memergencycontactno1.getText().toString(),memergencycontactno2.getText().toString());
Toast.makeText(getApplicationContext(), "registration sucess", Toast.LENGTH_SHORT).show();
finish();
// String fname = mname.getText().toString();
/*String dofb = dob.getText().toString();
String uname = mUsername.getText().toString();
String pass = mPassword.getText().toString();
String email = mEmail.getText().toString();
String PhoneNo = mphone.getText().toString();
String Address=maddress.getText().toString();
String BloodGroup=mbloodgroup.getText().toString();
String EmergencyContactNo1=memergencycontactno1.getText().toString();
String EmergencyContactNo2=memergencycontactno2.getText().toString();
*/
/* boolean invalid = false;
if (fname.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Enter your Firstname", Toast.LENGTH_SHORT).show();
} else if (dofb.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Please enter your Lastname", Toast.LENGTH_SHORT).show();
} else if (uname.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Please enter your Username", Toast.LENGTH_SHORT).show();
} else if (pass.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Please enter your Password", Toast.LENGTH_SHORT).show();
} else if (email.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Please enter your Email ID", Toast.LENGTH_SHORT).show();
} else if (PhoneNo.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Please enter your phone number", Toast.LENGTH_SHORT).show();
}
else if (Address.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Please enter your Address", Toast.LENGTH_SHORT).show();
}
else if (BloodGroup.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Please enter your BloodGroup", Toast.LENGTH_SHORT).show();
}
else if (EmergencyContactNo1.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Please enter your EmergencyContactNo1", Toast.LENGTH_SHORT).show();
}
else if (EmergencyContactNo2.equals("")) {
invalid = true;
Toast.makeText(getApplicationContext(), "Please enter your EmergencyContactNo2", Toast.LENGTH_SHORT).show();
}
else if (invalid == false) {*/
//finish();
/* }
break;*/
}
}
private boolean validateName() {
if (mname.getText().toString().trim().isEmpty()) {
try {
mname.setError("Enter Your Name");
}
catch (Exception e)
{}
requestFocus(mname);
return false;
}
return true;
}
private boolean validateDOB() {
if (dob.getText().toString().trim().isEmpty()) {
try {
dob.setError("Enter Your Date of Birth");
}
catch (Exception e)
{}
requestFocus(dob);
return false;
}
return true;
}
private boolean validateUserName() {
if (mUsername.getText().toString().trim().isEmpty()) {
try {
mUsername.setError("Enter User Name");
}
catch (Exception e)
{}
requestFocus(mUsername);
return false;
}
return true;
}
private boolean validateAddress() {
if (maddress.getText().toString().trim().isEmpty()) {
try {
maddress.setError("Enter Address");
}
catch (Exception e)
{}
requestFocus(maddress);
return false;
}
return true;
}
private boolean validateContact1() {
if (memergencycontactno1.getText().toString().trim().isEmpty()) {
try {
memergencycontactno1.setError("Enter Contact Number");
}
catch (Exception e)
{}
requestFocus(memergencycontactno1);
return false;
}
return true;
}
private boolean validateContact2() {
if (memergencycontactno2.getText().toString().trim().isEmpty()) {
try {
memergencycontactno2.setError("Enter Contact Number");
}
catch (Exception e)
{}
requestFocus(memergencycontactno2);
return false;
}
return true;
}
private boolean validateBloodGr() {
if (mbloodgroup.getText().toString().trim().isEmpty()) {
try {
mbloodgroup.setError("Enter Your Blood group");
}
catch (Exception e)
{}
requestFocus(mbloodgroup);
return false;
}
return true;
}
private boolean validatePhoneNumber() {
if (mphone.getText().toString().trim().isEmpty()) {
try {
mphone.setError("Enter Your phone number");
if (mphone.length()!=10)
Toast.makeText(getApplicationContext(), "Please enter your valid 10 digit phone number", Toast.LENGTH_SHORT).show();
}
catch (Exception e)
{}
requestFocus(mphone);
return false;
}
return true;
}
private boolean validatePassword() {
if (mPassword.getText().toString().trim().isEmpty()) {
try {
mPassword.setError("Enter Your Password");
} catch (Exception e) {
}
requestFocus(mPassword);
return false;
}
return true;
}
private boolean validateEmail() {
String email = mEmail.getText().toString().trim();
if (email.isEmpty() || !isValidEmail(email)) {
try {
mEmail.setError("Invalid email id");
}
catch (Exception e)
{}
requestFocus(mEmail);
return false;
}
return true;
}
private boolean validatergencycontactno1() {
if (mphone.getText().toString().trim().isEmpty()) {
try {
memergencycontactno1.setError("Enter Your phone number");
if (memergencycontactno1.length()!=10)
Toast.makeText(getApplicationContext(), "Please enter your valid 10 digit emergencycontactno1", Toast.LENGTH_SHORT).show();
}
catch (Exception e)
{}
requestFocus(mphone);
return false;
}
return true;
}
private boolean validatebloodgroup(){
return true;
}
private boolean validatergencycontactno2() {
if (mphone.getText().toString().trim().isEmpty()) {
try {
memergencycontactno2.setError("Enter Your phone number");
if (memergencycontactno2.length()!=10)
Toast.makeText(getApplicationContext(), "Please enter your valid 10 digit emergencycontactno2", Toast.LENGTH_SHORT).show();
}
catch (Exception e)
{}
requestFocus(mphone);
return false;
}
return true;
}
private static boolean isValidEmail(String email) {
return !TextUtils.isEmpty(email) && android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches();
}
private void requestFocus(View view) {
if (view.requestFocus()) {
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
}
}
public void onDestroy()
{
super.onDestroy();
DB.close();
}
private void addEntry(String name, String dob, String uname, String pass, String email, String phoneno, String addr,
String bloodgr, String contact1, String contact2)
{
SQLiteDatabase db = DB.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("name", name);
values.put("dob", dob);
values.put("username", uname);
values.put("password", pass);
values.put("email", email);
values.put("phoneno", phoneno);
values.put("address", addr);
values.put("bloodgroup", bloodgr);
values.put("econtact1", contact1);
values.put("econtact2", contact2);
try
{
db.insert(DBHelper.DATABASE_TABLE_NAME, null, values);
Toast.makeText(getApplicationContext(), "your details submitted Successfully...", Toast.LENGTH_SHORT).show();
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
content_main.xml:-
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_marginBottom="10dp" android:paddingTop="@dimen/activity_vertical_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingBottom="@dimen/activity_vertical_margin" android:layout_weight="2" android:layout_height="match_parent" android:layout_width="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.uniqval.registration.MainActivity"
tools:showIn="@layout/activity_main">
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:orientation="vertical">
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/til"><EditText
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/efname"
android:hint="Name"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
<EditText
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/dob"
android:hint="Date of Birth"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
<EditText
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/reuname"
android:hint="Username"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
<EditText
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/repass"
android:hint="Password"
android:inputType="textPassword"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
<EditText android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/eemail"
android:hint="Email"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
<EditText android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/pphoneno"
android:hint="Phone No"
android:inputType="number"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
<EditText
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/paddress"
android:hint="Address"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
>
<EditText
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/pbldgrp"
android:hint="Blood Group"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
<EditText
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/pemc1"
android:hint="Emergency Contact No1"
android:inputType="number"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
<EditText
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/pemc2"
android:hint="Emergency Contact No2"
android:inputType="number"/>
</android.support.design.widget.TextInputLayout>
</LinearLayout>
</LinearLayout>
</ScrollView>
activity+_main.xml:-
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.example.uniqval.registration.MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
android:src="@android:drawable/ic_dialog_email" />
<LinearLayout android:layout_height="wrap_content" android:layout_width="match_parent" android:id="@+id/relativeLayout1" android:weightSum="2" android:layout_gravity="bottom">
<Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:background="@drawable/round" android:id="@+id/submit" android:layout_marginRight="5dp" android:layout_marginLeft="5dp" android:layout_weight="1" android:text="Submit"/>
<Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:background="@drawable/round" android:id="@+id/cancel" android:layout_weight="1" android:text="Cancel" android:layout_toRightOf="@id/submit"/>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
答案 0 :(得分：0)
在xml中：
<EditText
android:id="@+id/edit_blood_group"
style="@style/edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/msg_blood_group"
android:maxLength="3"
android:digits="aboABO+-"/>
在验证码中：
public static boolean isBloodGroupValid(String bloodGroup, Context context){
if(bloodGroup != null) {
String[] bloodGroups = context.getResources().getStringArray(R.array.blood_groups);
int len = bloodGroups.length;
for (int i = 0; i < len; i++) {
if(bloodGroup.equalsIgnoreCase(bloodGroups[i]))
return true;
}
}return false;
}
在strings.xml中
<string-array name="blood_groups">
<item>O+</item>
<item>O-</item>
<item>A+</item>
<item>A-</item>
<item>B+</item>
<item>B-</item>
<item>AB+</item>
<item>AB-</item>
</string-array>
或者，您也可以定义一个带有数组中预先填充项的微调器，这样就没有人可以输入无效值。
检查年龄是否在18至24岁之间的示例：
public static boolean isDOBInRange(String dateStr) {
try {
Calendar calMin = Calendar.getInstance();
calMin.add(Calendar.YEAR, -Constants.MAX_AGE_LIMIT); //24
Date dateStart = calMin.getTime();
Calendar calMax = Calendar.getInstance();
calMax.add(Calendar.YEAR, -Constants.MIN_AGE_LIMIT); //18
Date dateEnd = calMax.getTime();
DateFormat format = new SimpleDateFormat("dd-MM-yyyy");
Date date = format.parse(dateStr);
if (date != null && dateStart != null && dateEnd != null) {
if (date.after(dateStart) && date.before(dateEnd)) {
return true;
} else {
return false;
}
}
return false;
} catch (Exception e) {
return false;
}
}
修改日期格式＆amp;相应的年龄限制。