You can do this using TextInputLayout and EditText.
Here is your XML:
<android.support.design.widget.TextInputLayout
android:id="@+id/text_input_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Label">
<EditText
android:id="@+id/edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text" />
</android.support.design.widget.TextInputLayout>
1. Add attribute android:hint="Label" to TextInputLayout to show its hints Label always.
2. Programmatically set EditText hints Placeholder only when EditText get focused.
Add below lines in your Activity:
.........
.................
final EditText editText = (EditText) findViewById(R.id.edit_text);
editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean hasFocus) {
if (hasFocus) {
editText.setHint("Placeholder");
} else {
editText.setHint("");
}
}
});
.........
..................
OUTPUT:
Hope this will help~
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Label">
<android.support.design.widget.TextInputEditText
android:hint="Placeholder"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress" />
</android.support.design.widget.TextInputLayout>
Notice that android:hint="Placeholder" from TextInputEditText is visible at the same time with android:hint="Label" from TextInputLayout when view is not focused. You could do some extra checking in your java code to show and hide that label. Or just leave android:hint="Placeholder" from TextInputLayout.
To change color, you need to set a theme using android:theme="@style/TextLabel for TextInputLayout and there set your color accent.
<style name="TextLabel" parent="TextAppearance.AppCompat.Light">
<item name="colorAccent">@color/yourColor</item>
</style>
You can use following code (in kotlin). It will show placeholder after 200 ms delay (to avoid overlapping hint and placeholder).
class PlaceholderEditText : TextInputEditText {
constructor(context: Context) : super(context)
constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
private val placeholder = hint
init {
hint = ""
onFocusChangeListener = OnFocusChangeListener { _, hasFocus ->
if (hasFocus) {
postDelayed({ hint = placeholder }, 200)
} else {
hint = ""
}
}
}
}
and then in layout xml class:
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="ALWAYS VISIBLE LABEL">
<com.myapp.widget.PlaceholderEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="DISAPPEARING PLACEHOLDER" />
</android.support.design.widget.TextInputLayout>
You can use below layout xml file as below.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:text="Label"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/textView2"
android:textColor="@color/wallet_holo_blue_light" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:text="Name"
android:ems="10"
android:id="@+id/editText2"
android:hint="Placeholder" />
</LinearLayout>
If you use textinputlayout then on focus of edittext, you didn't get any placeholder.
Layout:
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/username_txt"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.design.widget.TextInputLayout>
You have to set a focus change listener of the edittext.
Java:
usernameTxt.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus) {
usernameTxt.setHint("Label");
} else {
usernameTxt.setHint("Placeholder");
}
}
});
GIVEN: A TextInputEditText nested in TextInputLayout!
TL;DR!: Use this Kotlin Extension Function
fun EditText.setHintAndLabel(
textInputLayout: TextInputLayout,
label: String?, // hint in the TextInputLayout
hint: String? // hint in the EditText
) {
this.hint = ""
textInputLayout.hint = label
this.onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
if (hasFocus) {
this.hint = hint ?: ""
} else {
this.hint = ""
}
}
}
What's the problem and how does it solve it?
The Problem is that the hint of the EditText gets overlapped if there is a hint in the TextInputLayout. Which one to show in this case? Good question: We only want the EditText's hint to be displayed when it's focused/the cursor is inside but the TextInputLayout hint to be displayed always.
⮑ So we only set the hint for the EditText when it has the focus and remove it once it loses focus 🐙
来源:https://stackoverflow.com/questions/44164170/android-edittext-with-different-floating-label-and-placeholder

