Question

以下是双提示问题 - TextInputLayout and EditText double hint issue

我需要做同样的事情。我需要两个提示。一个是EditText的标题，第二个是可能的值，如果没有输入。

但不幸的是只有一个标签：

android:hint

我可以用它做点什么吗？

UPD1：

答案是以编程方式为EditText设置提示，并在xml中提示TextInputLayout。

        <android.support.design.widget.TextInputLayout
            android:layout_width="match_parent"
            android:hint="@string/prompt_quantity"
            android:layout_height="wrap_content">

            <EditText
                android:id="@+id/quantity"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="number"
                android:maxLines="1"
                android:singleLine="true" />

        </android.support.design.widget.TextInputLayout>

和

    quantityEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            quantityEditText.setHint(hasFocus ? "0" : "");
        }
    });

Answer 1

只需检查您的输入并根据具体情况更改提示：

PSPath                   : Microsoft.PowerShell.Security\Certificate::CurrentUser\My\XXX
PSParentPath             : Microsoft.PowerShell.Security\Certificate::CurrentUser\My
PSChildName              : XXX
PSDrive                  : Cert
PSProvider               : Microsoft.PowerShell.Security\Certificate
PSIsContainer            : False
EnhancedKeyUsageList     : {Code Signing (1.3.6.1.5.5.7.3.3)}
DnsNameList              : {XXX}
SendAsTrustedIssuer      : False
EnrollmentPolicyEndPoint : Microsoft.CertificateServices.Commands.EnrollmentEndPointProperty
EnrollmentServerEndPoint : Microsoft.CertificateServices.Commands.EnrollmentEndPointProperty
PolicyId                 :
Archived                 : False
Extensions               : {System.Security.Cryptography.Oid, System.Security.Cryptography.Oid, System.Security.Cryptography.Oid,
                           System.Security.Cryptography.Oid...}
FriendlyName             : XXX
IssuerName               : System.Security.Cryptography.X509Certificates.X500DistinguishedName
NotAfter                 : XXX
NotBefore                : XXX
HasPrivateKey            : True
PrivateKey               : System.Security.Cryptography.RSACryptoServiceProvider
PublicKey                : System.Security.Cryptography.X509Certificates.PublicKey
RawData                  : XXX
SerialNumber             : XXX
SubjectName              : System.Security.Cryptography.X509Certificates.X500DistinguishedName
SignatureAlgorithm       : System.Security.Cryptography.Oid
Thumbprint               : XXX
Version                  : 3
Handle                   : XXX
Issuer                   : XXX
Subject                  : XXX

Answer 2

试试这种方式

xml layout

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_gravity="center_vertical"
              android:layout_width="match_parent"
              android:layout_height="wrap_content">
    <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/non_active_edit_text"
            android:focusable="false"
            android:gravity="right|center_vertical"
            android:hint="Right"
            android:paddingTop="4dp"
            android:background="@null"/>


    <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/active_edit_text"
            android:hint="Left"
            android:layout_gravity="center_horizontal"/>
</merge>

JAVA课程

public class TwoHints extends RelativeLayout{

    EditText activeField;
    EditText nonActiveEditText;

    final CharSequence hint;
    public TwoHints(Context context, AttributeSet attrs) {
        super(context, attrs);
        LayoutInflater.from(context).inflate(R.layout.two_hints_edit_text, this);
        activeField = (EditText)findViewById(R.id.active_edit_text);
        nonActiveEditText = (EditText)findViewById(R.id.non_active_edit_text);
        hint = nonActiveEditText.getHint();
        activeField.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) {
                nonActiveEditText.setHint(s.length() !=0 ? "" : hint);
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });
    }
}

xml的editetext

<you.package.TwoHints
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textView"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>

Answer 3

您可以使用材料成分库

android:hint="Label"添加浮动标签
app:placeholderText="Placeholder Text"在EditText中添加一个占位符。

使用类似的东西：

<com.google.android.material.textfield.TextInputLayout
    android:hint="Label"
    app:placeholderText="Placeholder Text"
    ..>

     <com.google.android.material.textfield.TextInputEditText />

</com.google.android.material.textfield.TextInputLayout>

注意：它至少需要版本1.2.0-alpha03。

需要使用TextInputLayout在EditText中进行双重提示

3 个答案: