如何在Android中移动验证消息或密码

好吧，我不知道这是否是处理此问题的唯一方法，但是为了解决这个问题，我将布局从线性布局切换为网格布局，并在密码字段中添加了我的OWN图标NEXT，并为图像创建了一个侦听器做同样的事情。但是，通过切换到网格布局，看来我现在丢失了验证错误图标，我在这里问了这个问题，希望可以得到答案：https : //stackoverflow.com/questions/39290052/android-validation-icon-does-not -appear

新外观图片

代码更改如下，
不需要修改Strings.xml。
相反，实现了网格布局，并在密码字段中添加了下一个单独的图像。
activity_register.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android.support.design="http://schemas.android.com/tools"
    android:fitsSystemWindows="true"
    android:background="@color/black">

    <GridLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingTop="56dp"
        android:paddingLeft="24dp"
        android:paddingRight="24dp"
        android:orientation="vertical">

        <ImageView android:src="@drawable/logo"
            android:layout_height="72dp"
            android:layout_marginBottom="24dp"
            android:layout_column="0"
            android:layout_row="0"
            android:layout_columnSpan="2" />

        <!--  Name Label -->
        <android.support.design.widget.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp"
            android:textColor="#ffffff"
            android:textColorHint="#ffffff"
            android:layout_column="0"
            android:layout_row="1"
            android:layout_gravity="fill_horizontal"
            android:layout_columnSpan="2">
            <EditText android:id="@+id/input_name"
                android:theme="@style/MyEditTextTheme"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="textCapWords"
                android:hint="Trainer Name (Gamer Tag)" />
        </android.support.design.widget.TextInputLayout>

        <!-- Email Label -->
        <android.support.design.widget.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp"
            android:textColor="#ffffff"
            android:textColorHint="#ffffff"
            android:layout_column="0"
            android:layout_row="2"
            android:layout_gravity="fill_horizontal"
            android:layout_columnSpan="2">
            <EditText android:id="@+id/input_email"
                android:theme="@style/MyEditTextTheme"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:maxLength="60"
                android:inputType="textEmailAddress"
                android:hint="E-Mail Address" />
        </android.support.design.widget.TextInputLayout>

        <!-- Password Label -->
        <android.support.design.widget.TextInputLayout
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp"
            android:textColor="#ffffff"
            app:passwordToggleEnabled="false"
            android:textColorHint="#ffffff"
            android:layout_column="0"
            android:layout_row="3"
            android:layout_gravity="fill_horizontal">
            <EditText android:id="@+id/input_password"
                android:theme="@style/MyEditTextTheme"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:maxLength="20"
                android:inputType="textPassword"
                android:hint="Password" />
        </android.support.design.widget.TextInputLayout>

        <!-- Confirm Password Label -->
        <android.support.design.widget.TextInputLayout
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp"
            android:textColor="#ffffff"
            app:passwordToggleEnabled="false"
            android:textColorHint="#ffffff"
            android:layout_column="0"
            android:layout_row="4"
            android:layout_gravity="fill_horizontal">
            <EditText android:id="@+id/input_confirmPassword"
                android:theme="@style/MyEditTextTheme"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:maxLength="20"
                android:inputType="textPassword"
                android:hint="Confirm Password"/>
        </android.support.design.widget.TextInputLayout>

        <!-- Signup Button -->
        <android.support.v7.widget.AppCompatButton
            android:id="@+id/btn_signup"
            android:gravity="fill_horizontal"
            android:layout_height="wrap_content"
            android:layout_marginTop="24dp"
            android:layout_marginBottom="24dp"
            android:padding="12dp"
            android:text="Create Account"
            android:layout_column="0"
            android:layout_row="5"
            android:layout_columnSpan="2"
            android:layout_gravity="fill_horizontal"
            android:textAlignment="center" />

        <TextView android:id="@+id/link_login"
            android:gravity="fill_horizontal"
            android:layout_height="wrap_content"
            android:layout_marginBottom="24dp"
            android:text="Already a member? Login"
            android:textColor="#ffffff"
            android:textSize="16dip"
            android:layout_column="0"
            android:layout_row="6"
            android:layout_columnSpan="2"
            android:layout_gravity="fill_horizontal"
            android:textAlignment="center" />

        <!-- Icon added here for Password Toggle for Password field -->
        <ImageView
            android:id="@+id/fragment_login_password_visibility"
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:clickable="true"
            android:src="@drawable/eye"
            android:layout_row="3"
            android:layout_column="1"
            android:foregroundGravity="center_vertical"
            android:layout_gravity="center_vertical" />

      <!-- Icon added here for Password Toggle for Confirm Password field-->
        <ImageView
            android:id="@+id/fragment_login_confirm_password_visibility"
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:clickable="true"
            android:src="@drawable/eye"
            android:layout_row="4"
            android:layout_column="1"
            android:foregroundGravity="center_vertical"
            android:layout_gravity="center_vertical" />

    </GridLayout>
</ScrollView>

RegisterActivity

public class RegisterActivity extends AppCompatActivity {
    private static final String TAG = "RegisterActivity";

    @InjectView(R.id.input_name) EditText _nameText;
    @InjectView(R.id.input_email) EditText _emailText;
    @InjectView(R.id.input_password) EditText _passwordText;
    @InjectView(R.id.fragment_login_password_visibility) ImageView _passwordToggle;
    @InjectView(R.id.fragment_login_confirm_password_visibility) ImageView _confirmPasswordToggle;
    @InjectView(R.id.input_confirmPassword) EditText _confirmPasswordText;
    @InjectView(R.id.btn_signup) Button _signupButton;
    @InjectView(R.id.link_login) TextView _loginLink;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        ButterKnife.inject(this);
        //_passwordToggle.setVisibility(View.GONE);
        //_confirmPasswordToggle.setVisibility(View.GONE);

        _signupButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                signup();
            }
        });

        _loginLink.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Finish the registration screen and return to the Login activity
                finish();
            }
        });

        //Code added HERE for handling the text change for the password icon, I decided not to make the icon disappear if there is no text in the input field but if you choose to do so then uncomment the functional code below.
        _passwordText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                //_passwordToggle.setVisibility(s.length() > 0 ? View.VISIBLE : View.GONE);
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

            @Override
            public void afterTextChanged(Editable s) {
                //_passwordToggle.setVisibility(s.length() > 0 ? View.VISIBLE : View.GONE);
            }
        });
        _passwordToggle.setOnTouchListener(mPasswordVisibleTouchListener);

        _confirmPasswordText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                //_passwordToggle.setVisibility(s.length() > 0 ? View.VISIBLE : View.GONE);
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

            @Override
            public void afterTextChanged(Editable s) {
                //_confirmPasswordToggle.setVisibility(s.length() > 0 ? View.VISIBLE : View.GONE);
            }
        });
        _confirmPasswordToggle.setOnTouchListener(mConfirmPasswordVisibleTouchListener);
    }

    private View.OnTouchListener mPasswordVisibleTouchListener = new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            final boolean isOutsideView = event.getX() < 0 ||
                    event.getX() > v.getWidth() ||
                    event.getY() < 0 ||
                    event.getY() > v.getHeight();

            // change input type will reset cursor position, so we want to save it
            final int cursor = _passwordText.getSelectionStart();

            if (isOutsideView || MotionEvent.ACTION_UP == event.getAction())
                _passwordText.setInputType( InputType.TYPE_CLASS_TEXT |
                        InputType.TYPE_TEXT_VARIATION_PASSWORD);
            else
                _passwordText.setInputType( InputType.TYPE_CLASS_TEXT |
                        InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);

            _passwordText.setSelection(cursor);
            return true;
        }
    };

    private View.OnTouchListener mConfirmPasswordVisibleTouchListener = new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            final boolean isOutsideView = event.getX() < 0 ||
                    event.getX() > v.getWidth() ||
                    event.getY() < 0 ||
                    event.getY() > v.getHeight();

            // change input type will reset cursor position, so we want to save it
            final int cursor = _confirmPasswordText.getSelectionStart();

            if (isOutsideView || MotionEvent.ACTION_UP == event.getAction())
                _confirmPasswordText.setInputType( InputType.TYPE_CLASS_TEXT |
                        InputType.TYPE_TEXT_VARIATION_PASSWORD);
            else
                _confirmPasswordText.setInputType( InputType.TYPE_CLASS_TEXT |
                        InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);

            _confirmPasswordText.setSelection(cursor);
            return true;
        }
    };
    //End of NEW code changes

    public void signup() {
        Log.d(TAG, "Begin Signup process...");

        if (!validate()) {
            onSignupFailed();
            return;
        }

        _signupButton.setEnabled(false);

        final ProgressDialog signupProgressDialog = new ProgressDialog(RegisterActivity.this,
                R.style.Theme_IAPTheme);
        signupProgressDialog.setIndeterminate(true);
        signupProgressDialog.setMessage("Creating Account...");
        signupProgressDialog.show();

        String name = _nameText.getText().toString();
        String email = _emailText.getText().toString();
        String password = _passwordText.getText().toString();
        String confirmPassword = _confirmPasswordText.getText().toString();

        // TODO: Implement your own signup logic here.

        Response.Listener<String> responseListener = new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                try {
                    Log.i("tagconvertstr", "["+response+"]");
                    JSONObject jsonResponse = new JSONObject(response);
                    boolean success = jsonResponse.getBoolean("success");
                    if (success) {
                        onSignupSuccess();
                    } else {
                        onSignupFailed();
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        };

        RegisterRequest registerRequest = new RegisterRequest(name, email, password, responseListener);
        RequestQueue queue = Volley.newRequestQueue(RegisterActivity.this);
        queue.add(registerRequest);

        /*new android.os.Handler().postDelayed(
                new Runnable() {
                    public void run() {

                        // On complete call either onSignupSuccess or onSignupFailed
                        // depending on success
                        onSignupSuccess();
                        // onSignupFailed();
                        progressDialog.dismiss();
                    }
                }, 3000);*/
    }

    public void onSignupSuccess() {
        Toast.makeText(getBaseContext(), "Signup Successful", Toast.LENGTH_LONG).show();
        _signupButton.setEnabled(true);
        setResult(RESULT_OK, null);
        finish();
    }

    public void onSignupFailed() {
        Toast.makeText(getBaseContext(), "Signup Failed", Toast.LENGTH_LONG).show();
        _signupButton.setEnabled(true);
    }

    public boolean validate() {
        boolean valid = true;

        Drawable errorIcon = getResources().getDrawable(R.drawable.eye);
        errorIcon.setBounds(new Rect(0, 0, 100, 100));


        String name = _nameText.getText().toString();
        String email = _emailText.getText().toString();
        String password = _passwordText.getText().toString();
        String confirmPassword = _confirmPasswordText.getText().toString();

        //Trainer Name validation
        if (name.isEmpty() || name.length() < 3) {
            _nameText.setError("enter at least 3 characters", errorIcon);
            valid = false;
        } else {
            _nameText.setError(null);
        }

        //E-Mail validation
        if (email.isEmpty() || !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
            _emailText.setError("enter a valid email address");
            valid = false;
        } else {
            _emailText.setError(null);
        }

        //Password validation
        if (password.isEmpty() || password.length() < 4 || password.length() > 10) {
            _passwordText.setError("between 4 and 20 alphanumeric characters");
            valid = false;
        }else {
            _passwordText.setError(null);
        }

        //Confirm Password validation
        if (password.equals(confirmPassword)){
            _confirmPasswordText.setError(null);
        }else {
            _confirmPasswordText.setError("passwords do not match");
            valid = false;
        }

        return valid;
    }
}