Java tutorial
/* * Copyright (C) 2014 The Android Open Source Project * * 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. */ package android.support.v7.internal.widget; import android.content.Context; import android.content.res.ColorStateList; import android.graphics.PorterDuff; import android.os.Build; import android.support.annotation.Nullable; import android.support.v4.view.TintableBackgroundView; import android.util.AttributeSet; import android.widget.Button; /** * An tint aware {@link android.widget.Button}. * <p> * This will automatically be used when you use {@link android.widget.Button} in your layouts. You * should only need to manually use this class when writing custom views. */ public class TintButton extends Button implements TintableBackgroundView { private static final int[] TINT_ATTRS = { android.R.attr.background }; private TintInfo mBackgroundTint; public TintButton(Context context) { this(context, null); } public TintButton(Context context, AttributeSet attrs) { this(context, attrs, android.R.attr.buttonStyle); } public TintButton(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); if (TintManager.SHOULD_BE_USED) { TintTypedArray a = TintTypedArray.obtainStyledAttributes(getContext(), attrs, TINT_ATTRS, defStyleAttr, 0); if (a.hasValue(0)) { setSupportBackgroundTintList(a.getTintManager().getColorStateList(a.getResourceId(0, -1))); } a.recycle(); } final ColorStateList textColors = getTextColors(); if (textColors != null && !textColors.isStateful()) { // If we have a ColorStateList which isn't stateful, create one which includes // a disabled state final int disabledTextColor; if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) { // Pre-Lollipop, we will use textColorSecondary with android:disabledAlpha // applied disabledTextColor = ThemeUtils.getDisabledThemeAttrColor(context, android.R.attr.textColorSecondary); } else { // With certain styles on Lollipop, there is a StateListAnimator which sets // an alpha on the whole view, so we don't need to apply disabledAlpha to // textColorSecondary disabledTextColor = ThemeUtils.getThemeAttrColor(context, android.R.attr.textColorSecondary); } setTextColor(ThemeUtils.createDisabledStateList(textColors.getDefaultColor(), disabledTextColor)); } } /** * This should be accessed via * {@link android.support.v4.view.ViewCompat#setBackgroundTintList(android.view.View, * android.content.res.ColorStateList)} * * @hide */ @Override public void setSupportBackgroundTintList(@Nullable ColorStateList tint) { if (mBackgroundTint == null) { mBackgroundTint = new TintInfo(); } mBackgroundTint.mTintList = tint; applySupportBackgroundTint(); } /** * This should be accessed via * {@link android.support.v4.view.ViewCompat#getBackgroundTintList(android.view.View)} * * @hide */ @Override @Nullable public ColorStateList getSupportBackgroundTintList() { return mBackgroundTint != null ? mBackgroundTint.mTintList : null; } /** * This should be accessed via * {@link android.support.v4.view.ViewCompat#setBackgroundTintMode(android.view.View, android.graphics.PorterDuff.Mode)} * * @hide */ @Override public void setSupportBackgroundTintMode(@Nullable PorterDuff.Mode tintMode) { if (mBackgroundTint == null) { mBackgroundTint = new TintInfo(); } mBackgroundTint.mTintMode = tintMode; applySupportBackgroundTint(); } /** * This should be accessed via * {@link android.support.v4.view.ViewCompat#getBackgroundTintMode(android.view.View)} * * @hide */ @Override @Nullable public PorterDuff.Mode getSupportBackgroundTintMode() { return mBackgroundTint != null ? mBackgroundTint.mTintMode : null; } @Override protected void drawableStateChanged() { super.drawableStateChanged(); applySupportBackgroundTint(); } private void applySupportBackgroundTint() { if (getBackground() != null && mBackgroundTint != null) { TintManager.tintViewBackground(this, mBackgroundTint); } } }