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<!-- | |
Copyright (C) 2014 Chris Banes | |
Licensed under the Apache License, Version 2.0 (the "License"); | |
you may not use this file except in compliance with the License. | |
You may obtain a copy of the License at | |
http://www.apache.org/licenses/LICENSE-2.0 | |
Unless required by applicable law or agreed to in writing, software | |
distributed under the License is distributed on an "AS IS" BASIS, | |
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
See the License for the specific language governing permissions and | |
limitations under the License. | |
--> | |
<?xml version="1.0" encoding="utf-8"?> | |
<resources> | |
<declare-styleable name="FloatLabelLayout"> | |
<attr name="floatLabelTextAppearance" format="reference" /> | |
<attr name="floatLabelPaddingLeft" format="reference|dimension" /> | |
<attr name="floatLabelPaddingRight" format="reference|dimension" /> | |
<attr name="floatLabelPaddingTop" format="reference|dimension" /> | |
<attr name="floatLabelPaddingBottom" format="reference|dimension" /> | |
<!-- The hint to display in the floating label --> | |
<attr name="floatLabelHint" format="reference|string" /> | |
</declare-styleable> | |
</resources> |
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<?xml version="1.0" encoding="utf-8"?> | |
<selector xmlns:android="http://schemas.android.com/apk/res/android"> | |
<!-- The color when activated/focused (usually your app's accent color) --> | |
<item android:color="..." android:state_activated="true" /> | |
<!-- The color when not activated/focused (usually android:textColorSecondary) --> | |
<item android:color="..." /> | |
</selector> |
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<?xml version="1.0" encoding="utf-8"?> | |
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" | |
xmlns:app="http://schemas.android.com/apk/res-auto" | |
android:orientation="vertical" | |
android:layout_width="match_parent" | |
android:layout_height="match_parent"> | |
<your.package.FloatLabelLayout | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
app:floatLabelTextAppearance="@style/TextAppearance.YourApp.FloatLabel"> | |
<EditText | |
android:id="@+id/edit_username" | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
android:hint="@string/account_username_hint" | |
android:singleLine="true" | |
android:inputType="textNoSuggestions" | |
android:imeOptions="actionNext" | |
android:nextFocusDown="@+id/edit_password" /> | |
</your.package.FloatLabelLayout> | |
<your.package.FloatLabelLayout | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
app:floatLabelTextAppearance="@style/TextAppearance.YourApp.FloatLabel"> | |
<EditText | |
android:id="@+id/edit_password" | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
android:hint="@string/account_password_hint" | |
android:singleLine="true" | |
android:inputType="textNoSuggestions" | |
android:imeOptions="actionDone" /> | |
</your.package.FloatLabelLayout> | |
</LinearLayout> |
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<?xml version="1.0" encoding="utf-8"?> | |
<resources> | |
<style name="TextAppearance.YourApp.FloatLabel" parent="android:TextAppearance.Small"> | |
<item name="android:textColor">@color/float_label</item> | |
<item name="android:textSize">12sp</item> | |
</style> | |
</resources> |
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/* | |
* Copyright 2014 Chris Banes | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
import android.content.Context; | |
import android.content.res.TypedArray; | |
import android.os.Build; | |
import android.support.v4.view.ViewCompat; | |
import android.support.v4.view.ViewPropertyAnimatorListenerAdapter; | |
import android.text.Editable; | |
import android.text.TextUtils; | |
import android.text.TextWatcher; | |
import android.util.AttributeSet; | |
import android.util.TypedValue; | |
import android.view.View; | |
import android.view.ViewGroup; | |
import android.view.animation.AnimationUtils; | |
import android.view.animation.Interpolator; | |
import android.widget.EditText; | |
import android.widget.LinearLayout; | |
import android.widget.TextView; | |
/** | |
* Layout which an {@link android.widget.EditText} to show a floating label when the hint is hidden | |
* due to the user inputting text. | |
* | |
* @see <a href="https://dribbble.com/shots/1254439--GIF-Mobile-Form-Interaction">Matt D. Smith on Dribble</a> | |
* @see <a href="http://bradfrostweb.com/blog/post/float-label-pattern/">Brad Frost's blog post</a> | |
*/ | |
public class FloatLabelLayout extends LinearLayout { | |
private static final long ANIMATION_DURATION = 150; | |
private static final float DEFAULT_LABEL_PADDING_LEFT = 3f; | |
private static final float DEFAULT_LABEL_PADDING_TOP = 4f; | |
private static final float DEFAULT_LABEL_PADDING_RIGHT = 3f; | |
private static final float DEFAULT_LABEL_PADDING_BOTTOM = 4f; | |
private EditText mEditText; | |
private TextView mLabel; | |
private CharSequence mHint; | |
private Interpolator mInterpolator; | |
public FloatLabelLayout(Context context) { | |
this(context, null); | |
} | |
public FloatLabelLayout(Context context, AttributeSet attrs) { | |
this(context, attrs, 0); | |
} | |
public FloatLabelLayout(Context context, AttributeSet attrs, int defStyle) { | |
super(context, attrs, defStyle); | |
setOrientation(VERTICAL); | |
final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.FloatLabelLayout); | |
int leftPadding = a.getDimensionPixelSize( | |
R.styleable.FloatLabelLayout_floatLabelPaddingLeft, | |
dipsToPix(DEFAULT_LABEL_PADDING_LEFT)); | |
int topPadding = a.getDimensionPixelSize( | |
R.styleable.FloatLabelLayout_floatLabelPaddingTop, | |
dipsToPix(DEFAULT_LABEL_PADDING_TOP)); | |
int rightPadding = a.getDimensionPixelSize( | |
R.styleable.FloatLabelLayout_floatLabelPaddingRight, | |
dipsToPix(DEFAULT_LABEL_PADDING_RIGHT)); | |
int bottomPadding = a.getDimensionPixelSize( | |
R.styleable.FloatLabelLayout_floatLabelPaddingBottom, | |
dipsToPix(DEFAULT_LABEL_PADDING_BOTTOM)); | |
mHint = a.getText(R.styleable.FloatLabelLayout_floatLabelHint); | |
mLabel = new TextView(context); | |
mLabel.setPadding(leftPadding, topPadding, rightPadding, bottomPadding); | |
mLabel.setVisibility(INVISIBLE); | |
mLabel.setText(mHint); | |
ViewCompat.setPivotX(mLabel, 0f); | |
ViewCompat.setPivotY(mLabel, 0f); | |
mLabel.setTextAppearance(context, | |
a.getResourceId(R.styleable.FloatLabelLayout_floatLabelTextAppearance, | |
android.R.style.TextAppearance_Small)); | |
a.recycle(); | |
addView(mLabel, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); | |
mInterpolator = AnimationUtils.loadInterpolator(context, | |
Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP | |
? android.R.interpolator.fast_out_slow_in | |
: android.R.anim.decelerate_interpolator); | |
} | |
@Override | |
public final void addView(View child, int index, ViewGroup.LayoutParams params) { | |
if (child instanceof EditText) { | |
setEditText((EditText) child); | |
} | |
// Carry on adding the View... | |
super.addView(child, index, params); | |
} | |
private void setEditText(EditText editText) { | |
// If we already have an EditText, throw an exception | |
if (mEditText != null) { | |
throw new IllegalArgumentException("We already have an EditText, can only have one"); | |
} | |
mEditText = editText; | |
// Update the label visibility with no animation | |
updateLabelVisibility(false); | |
// Add a TextWatcher so that we know when the text input has changed | |
mEditText.addTextChangedListener(new TextWatcher() { | |
@Override | |
public void afterTextChanged(Editable s) { | |
updateLabelVisibility(true); | |
} | |
@Override | |
public void beforeTextChanged(CharSequence s, int start, int count, int after) {} | |
@Override | |
public void onTextChanged(CharSequence s, int start, int before, int count) {} | |
}); | |
// Add focus listener to the EditText so that we can notify the label that it is activated. | |
// Allows the use of a ColorStateList for the text color on the label | |
mEditText.setOnFocusChangeListener(new OnFocusChangeListener() { | |
@Override | |
public void onFocusChange(View view, boolean focused) { | |
updateLabelVisibility(true); | |
} | |
}); | |
// If we do not have a valid hint, try and retrieve it from the EditText | |
if (TextUtils.isEmpty(mHint)) { | |
setHint(mEditText.getHint()); | |
} | |
} | |
private void updateLabelVisibility(boolean animate) { | |
boolean hasText = !TextUtils.isEmpty(mEditText.getText()); | |
boolean isFocused = mEditText.isFocused(); | |
mLabel.setActivated(isFocused); | |
if (hasText || isFocused) { | |
// We should be showing the label so do so if it isn't already | |
if (mLabel.getVisibility() != VISIBLE) { | |
showLabel(animate); | |
} | |
} else { | |
// We should not be showing the label so hide it | |
if (mLabel.getVisibility() == VISIBLE) { | |
hideLabel(animate); | |
} | |
} | |
} | |
/** | |
* @return the {@link android.widget.EditText} text input | |
*/ | |
public EditText getEditText() { | |
return mEditText; | |
} | |
/** | |
* @return the {@link android.widget.TextView} label | |
*/ | |
public TextView getLabel() { | |
return mLabel; | |
} | |
/** | |
* Set the hint to be displayed in the floating label | |
*/ | |
public void setHint(CharSequence hint) { | |
mHint = hint; | |
mLabel.setText(hint); | |
} | |
/** | |
* Show the label | |
*/ | |
private void showLabel(boolean animate) { | |
if (animate) { | |
mLabel.setVisibility(View.VISIBLE); | |
ViewCompat.setTranslationY(mLabel, mLabel.getHeight()); | |
float scale = mEditText.getTextSize() / mLabel.getTextSize(); | |
ViewCompat.setScaleX(mLabel, scale); | |
ViewCompat.setScaleY(mLabel, scale); | |
ViewCompat.animate(mLabel) | |
.translationY(0f) | |
.scaleY(1f) | |
.scaleX(1f) | |
.setDuration(ANIMATION_DURATION) | |
.setListener(null) | |
.setInterpolator(mInterpolator).start(); | |
} else { | |
mLabel.setVisibility(VISIBLE); | |
} | |
mEditText.setHint(null); | |
} | |
/** | |
* Hide the label | |
*/ | |
private void hideLabel(boolean animate) { | |
if (animate) { | |
float scale = mEditText.getTextSize() / mLabel.getTextSize(); | |
ViewCompat.setScaleX(mLabel, 1f); | |
ViewCompat.setScaleY(mLabel, 1f); | |
ViewCompat.setTranslationY(mLabel, 0f); | |
ViewCompat.animate(mLabel) | |
.translationY(mLabel.getHeight()) | |
.setDuration(ANIMATION_DURATION) | |
.scaleX(scale) | |
.scaleY(scale) | |
.setListener(new ViewPropertyAnimatorListenerAdapter() { | |
@Override | |
public void onAnimationEnd(View view) { | |
mLabel.setVisibility(INVISIBLE); | |
mEditText.setHint(mHint); | |
} | |
}) | |
.setInterpolator(mInterpolator).start(); | |
} else { | |
mLabel.setVisibility(INVISIBLE); | |
mEditText.setHint(mHint); | |
} | |
} | |
/** | |
* Helper method to convert dips to pixels. | |
*/ | |
private int dipsToPix(float dps) { | |
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dps, | |
getResources().getDisplayMetrics()); | |
} | |
} |
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