安卓屏幕方向编辑文本如何显示设置错误？

Question

我是一名有用的助手，可以将文本翻译成中文。

我是一个新手Android开发者，在我的应用程序中设计了横向和纵向模式的布局。该应用程序在两种屏幕方向下运行良好。

在此应用程序中，我已经在编辑文本上设置了验证，并通过setError()显示错误。这个方法工作得很好，但当我尝试旋转带有空白字段的编辑文本时，setError()方法会设置错误。我尝试通过Google搜索以不同的方式解决这个问题，但没有成功。请帮帮我。谢谢。

以下是我的代码：

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();
        }
    }

还要在清单文件中定义方向

 <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>

- TechChain

---

你找到了解决这个问题的方法吗？ - kgandroid

Answer 1

无论何时您改变方向，所有视图都会重新生成。 OnCreateView方法再次被调用，并将TextChangedListener再次添加到editText View中，该listener调用其方法并最终在空的editText上调用setError方法。 为了检查屏幕方向是否已更改且未在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，则此bundle为null，但当屏幕方向更改时，它不为null。 请查看下面的代码，我仅对name EditText实现了它，但我想您将不得不对所有EditText Views执行相同的操作，因为它取决于指针在方向更改时位于哪个view上。 将一个bundle声明为类成员，如下所示：

    Bundle mSavedInstanceState;

并在OnCreate()方法中将传递的bundle保存其中，如下所示：

        if(savedInstanceState != null){
        this.mSavedInstanceState = savedInstanceState;
    }

现在在检查错误时使用此包，如果其方向更改（即bundle不为空），则不显示错误... 请使用以下代码替换您的代码， 附注：某些条件是错误的，我已经修复了它们， 希望能对您有所帮助..！ 如果它对您有用，请告诉我，并将其标记为答案，以便其他人也可以受益。

    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();
    }
    }

- Rohit Jagtap