问题
This may seem counter-intuitive but is there a way to disable or remove the floating label hint in TextInputLayout? The reason I want to use TextInputLayout instead of just an EditText is for the counter that TextInputLayout provides.
Here is what I have so far:
<android.support.design.widget.TextInputLayout
android:id="@+id/textContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical"
app:counterEnabled="true"
app:counterMaxLength="100">
<EditText
android:id="@+id/myEditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="top|left"
android:inputType="textMultiLine|textCapSentences"
android:maxLength="100"
android:scrollbars="vertical"
android:hint="This is my cool hint"/>
</android.support.design.widget.TextInputLayout>
回答1:
Starting version 23.2.0 of the Support Library you can call
setHintEnabled(false)
or putting it in your TextInputLayout xml as such :
app:hintEnabled="false"
Though the name might makes you think it removes all hints, it just removes the floating one.
Related docs and issue: http://developer.android.com/reference/android/support/design/widget/TextInputLayout.html#setHintEnabled(boolean)
https://code.google.com/p/android/issues/detail?id=181590
回答2:
There may be three ways to go about achieving this:
1 Set android:hint on TextInputLayout to a space _ character, and keep android:hint="This is my cool hint" set on the EditText.
<android.support.design.widget.TextInputLayout
....
....
android:hint=" "> <<----------
<EditText
....
....
android:hint="This is my cool hint"/> <<----------
</android.support.design.widget.TextInputLayout>
This works because TextInputLayout performs the following check before using the EditText's hint:
// If we do not have a valid hint, try and retrieve it from the EditText
if (TextUtils.isEmpty(mHint)) {
setHint(mEditText.getHint());
// Clear the EditText's hint as we will display it ourselves
mEditText.setHint(null);
}
By setting android:hint=" ", if (TextUtils.isEmpty(mHint)) evaluates to false, and the EditText retains its hint.
2 Second option would be to subclass TextInputLayout and override its addView(View child, int index, ViewGroup.LayoutParams params) method:
public class CTextInputLayout extends TextInputLayout {
public CTextInputLayout(Context context) {
this(context, null);
}
public CTextInputLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CTextInputLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
if (child instanceof EditText) {
// cache the actual hint
CharSequence hint = ((EditText)child).getHint();
// remove the hint for now - we don't want TextInputLayout to see it
((EditText)child).setHint(null);
// let `TextInputLayout` do its thing
super.addView(child, index, params);
// finally, set the hint back
((EditText)child).setHint(hint);
} else {
// Carry on adding the View...
super.addView(child, index, params);
}
}
}
Then use your custom CTextInoutLayout instead of the one from the design support library:
<your.package.name.CTextInputLayout
....
.... > <<----------
<EditText
....
....
android:hint="This is my cool hint"/> <<----------
</your.package.name.CTextInputLayout>
3 Third, and probably the most straight-forward way would be to make the following calls:
// remove hint from `TextInputLayout`
((TextInputLayout)findViewById(R.id.textContainer)).setHint(null);
// set the hint back on the `EditText`
// The passed `String` could also be a string resource
((EditText)findViewById(R.id.myEditText)).setHint("This is my cool hinttt.");
回答3:
With com.google.android.material you can hide by
<com.google.android.material.textfield.TextInputLayout
....
app:hintAnimationEnabled="false"
app:hintEnabled="false"
>
<com.google.android.material.textfield.TextInputEditText
........
android:hint="@string/label_hint"
/>
</com.google.android.material.textfield.TextInputLayout>
回答4:
I've tried all of answers, but non of them are working now (specifically for com.google.android.material:material:1.1.0-beta01). Even if we make changes to EditText addition logic in TextInputLayout, we have empty space on top of field that blanking half of text and hint. Now I have a solution for the problem. Main thing is a padding in EditText, as mentioned in material.io:
<com.google.android.material.textfield.TextInputLayout
. . .
android:layout_height="wrap_content"
app:hintEnabled="false"
app:startIconDrawable="@drawable/ic_search_black"
app:endIconMode="clear_text">
<com.google.android.material.textfield.TextInputEditText
android:id="@+id/et_search"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="12dp"
android:hint="@string/showcase_search_hint_text"
android:inputType="text" />
</com.google.android.material.textfield.TextInputLayout>
It allows us to implement a 'SearchView'-like view with search icon and text deletion button without any ugly "magic" with custom views
回答5:
I think this will help you:
textContainer.setHintAnimationEnabled(false);
回答6:
update the design library to v23 and add app:hintAnimationEnabled="false" in the TextInputLayout
来源：https://stackoverflow.com/questions/35423569/disable-remove-floating-label-hint-text-in-textinputlayout-xml