我是android新手，制作一个应用程序，其中有纵向和横向模式的布局设计。这款应用在两个屏幕方向上都运行良好。在这个应用程序中，我设置了对编辑文本的验证，并通过set error()显示错误。这个工作很好，但当我尝试旋转方向与空白字段在编辑文本设置错误()方法设置错误． 我试图通过谷歌搜索用不同的方法解决这个问题，但没有成功。请帮帮我。由于
下面是我的代码
EditText name, email, phone_no, subject, message;
Button send;
JSONObject json;
final Context context = this;
String valid_name = " ", valid_phone_no = " ", valid_email = " ",
valid_sub = " ", valid_msg = " ";
private ProgressDialog pDialog;
Boolean isInternetPresent = false;
Boolean isrotaion = false;
static boolean et_focus;
String emailPattern = "^[_A-Za-z0-9-]+(\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\.[A-Za-z0-9]+)*(\.[A-Za-z]{2,})$";
JsonParser jsonParser = new JsonParser();
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.contact_us);
name = (EditText) findViewById(R.id.edtname);
email = (EditText) findViewById(R.id.edtemail);
phone_no = (EditText) findViewById(R.id.edtphone);
subject = (EditText) findViewById(R.id.edtsubject);
message = (EditText) findViewById(R.id.edtmessage);
send = (Button) findViewById(R.id.send);
ActionBar actionBar = getActionBar();
actionBar.setDisplayShowHomeEnabled(false);
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setBackgroundDrawable(new ColorDrawable(Color
.parseColor("#0f567c")));
setTitle("Contact us");
send.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (valid_name != null && valid_email != null
&& valid_phone_no != null && valid_sub != null
&& valid_msg != null) {
isInternetPresent = isConnected();
if (!isInternetPresent) {
buildAlertMessageNonet();
} else
{
new CreateContact().execute();
}
} else {
Toast.makeText(getApplicationContext(),
"Please Fill up all Fields Correctly.",
Toast.LENGTH_SHORT).show();
}
}
});
int orientation = this.getResources().getConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_PORTRAIT) {
// code for portrait mode
isrotaion = true;
} else {
// code for landscape mode
isrotaion = true;
}
name.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
validtion_name(name);
}
});
email.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
Log.i("TAG", "betextchange");
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
validation_Email(email);
}
});
phone_no.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
validation_Phone_no(10, 13, phone_no);
}
});
subject.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
validation_Subject(subject);
}
});
message.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
validation_Message(message);
}
});
}
public void validtion_name(EditText edt) throws NumberFormatException {
Log.i("TAG", "name");
Log.i("TAG", String.valueOf(edt.length()));
if (edt.getText().toString().trim().length() <= 0) {
edt.setError("Accept Alphabets Only.");
valid_name = null;
} else if (edt.getText().toString().contains(" ")) {
edt.setError(null);
} else if (!edt.getText().toString().matches("[a-zA-Z]+")) {
edt.setError("Accept Alphabets Only.");
valid_name = null;
} else if (edt.getText().toString().charAt(0) == ' ') {
edt.setError("First Letter Not be Space ");
valid_name = null;
} else {
valid_name = edt.getText().toString();
}
}
public void validation_Phone_no(int MinLen, int MaxLen, EditText edt)
throws NumberFormatException {
if (edt.getText().toString().length() <= 0) {
edt.setError("Numbers Only");
valid_phone_no = null;
} else if (edt.getText().toString().length() < MinLen) {
edt.setError("Minimum length " + MinLen);
valid_phone_no = null;
} else if (edt.getText().toString().length() > MaxLen) {
edt.setError("Maximum length " + MaxLen);
valid_phone_no = null;
} else if (edt.getText().toString().charAt(0) == ' ') {
edt.setError("First Number Not be Space");
valid_phone_no = null;
} else if (!edt.getText().toString().matches("^[+]?[0-9]{10,13}$")) {
edt.setError("Invalid Number");
valid_phone_no = null;
}
else {
valid_phone_no = edt.getText().toString();
}
}
public void validation_Email(EditText edt) {
if (edt.getText().toString() == null) {
edt.setError("Invalid Email Address");
valid_email = null;
} else if (isEmailValid(edt.getText().toString()) == false) {
edt.setError("Invalid Email Address");
valid_email = null;
} else if (edt.getText().toString().charAt(0) == ' ') {
edt.setError("First Letter Not be Space");
valid_email = null;
} else if (!edt.getText().toString().matches(emailPattern)) {
edt.setError("Invalid Email Address");
valid_email = null;
} else {
valid_email = edt.getText().toString();
}
}
boolean isEmailValid(CharSequence email) {
return android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches();
}
public void validation_Subject(EditText edt) {
if (edt.getText().toString().isEmpty()) {
edt.setError("Subject not be Empty ");
valid_sub = null;
} else if (edt.getText().toString().charAt(0) == ' ') {
edt.setError("First Letter Not be Space");
valid_sub = null;
} else {
valid_sub = edt.getText().toString();
}
}
public void validation_Message(EditText edt) {
Log.i("TAG", "maessage");
if (edt.getText().toString().isEmpty()) {
edt.setError("Message not be Empty ");
valid_msg = null;
} else if (edt.getText().toString().charAt(0) == ' ') {
edt.setError("First Letter Not be Space");
valid_msg = null;
} else {
edt.setError(null);
valid_msg = edt.getText().toString();
}
}
也在manifest
中定义排序 <application
android:allowBackup="true"
android:icon="@drawable/icon"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.my.Home"
android:configChanges="orientation"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.my.Careers"
android:configChanges="orientation"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.my.Services"
android:configChanges="orientation" >
</activity>
<activity
android:name="com.my.Contact_us"
android:configChanges="orientation|keyboardHidden"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.my.View_service"
android:configChanges="orientation" >
</activity>
<activity
android:name="com.my.Direction"
android:configChanges="orientation" >
</activity>
当你改变方向时，所有的视图都会重新生成。OnCreateView方法再次被调用，TextChangedListener再次被添加到editText视图中，该视图调用其方法，最终在空白editText上调用setError。为了检查屏幕方向是否被改变，并且没有在EditText中输入任何内容，我们可以使用在activity的OnCreate()方法中传递的Bundle，如果activity是新创建的，这个Bundle是空的，但是当屏幕方向被改变时，它不是空的。检查下面的代码，我已经实现了它的名称只有EditText，但我猜你将不得不做同样的所有EditText视图，因为它取决于哪个视图的光标是，而方向改变。将一个bundle声明为类成员，
Bundle mSavedInstanceState;
并在OnCreate()方法中将传递的bundle保存为
if(savedInstanceState != null){
this.mSavedInstanceState = savedInstanceState;
}
现在在检查错误时使用这个bundle，如果它的方向改变了。Bundle不会为null)不要显示错误…将代码替换为下面的代码:附言:有些条件是错误的，我已经修正了，希望能有所帮助!让我知道它是否适合你，并标记为答案，以便对其他人有用。
public void validtion_name(EditText edt) throws NumberFormatException {
Log.i("TAG", "name");
Log.i("TAG", String.valueOf(edt.length()));
if (edt.getText().toString().trim().length() <= 0 && mSavedInstanceState ==null) {
edt.setError("Accept Alphabets Only.");
valid_name = null;
} else if (edt.getText().toString().contains(" ")) {
edt.setError(null);
} else if (edt.getText().toString().trim().length() > 0 && !edt.getText().toString().matches("[a-zA-Z]+")) {
edt.setError("Accept Alphabets Only.");
valid_name = null;
} else if (edt.getText().toString().length() > 0) {
if(edt.getText().toString().charAt(0) == ' '){
edt.setError("First Letter Not be Space ");
valid_name = null;
}
} else {
valid_name = edt.getText().toString();
}
}