| /* |
| * Copyright (C) 2017 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 com.android.setupwizardlib.template; |
| |
| import android.content.res.ColorStateList; |
| import android.os.Build; |
| import android.os.Build.VERSION_CODES; |
| import android.support.annotation.Nullable; |
| import android.view.View; |
| import android.view.ViewStub; |
| import android.widget.ProgressBar; |
| |
| import com.android.setupwizardlib.R; |
| import com.android.setupwizardlib.TemplateLayout; |
| |
| /** |
| * A {@link Mixin} for showing a progress bar. |
| */ |
| public class ProgressBarMixin implements Mixin { |
| |
| private TemplateLayout mTemplateLayout; |
| |
| @Nullable |
| private ColorStateList mColor; |
| |
| /** |
| * @param layout The layout this mixin belongs to. |
| */ |
| public ProgressBarMixin(TemplateLayout layout) { |
| mTemplateLayout = layout; |
| } |
| |
| /** |
| * @return True if the progress bar is currently shown. |
| */ |
| public boolean isShown() { |
| final View progressBar = mTemplateLayout.findManagedViewById(R.id.suw_layout_progress); |
| return progressBar != null && progressBar.getVisibility() == View.VISIBLE; |
| } |
| |
| /** |
| * Sets whether the progress bar is shown. If the progress bar has not been inflated from the |
| * stub, this method will inflate the progress bar. |
| * |
| * @param shown True to show the progress bar, false to hide it. |
| */ |
| public void setShown(boolean shown) { |
| if (shown) { |
| View progressBar = getProgressBar(); |
| if (progressBar != null) { |
| progressBar.setVisibility(View.VISIBLE); |
| } |
| } else { |
| View progressBar = peekProgressBar(); |
| if (progressBar != null) { |
| progressBar.setVisibility(View.GONE); |
| } |
| } |
| } |
| |
| /** |
| * Gets the progress bar in the layout. If the progress bar has not been used before, it will be |
| * installed (i.e. inflated from its view stub). |
| * |
| * @return The progress bar of this layout. May be null only if the template used doesn't have a |
| * progress bar built-in. |
| */ |
| private ProgressBar getProgressBar() { |
| final View progressBar = peekProgressBar(); |
| if (progressBar == null) { |
| final ViewStub progressBarStub = |
| (ViewStub) mTemplateLayout.findManagedViewById(R.id.suw_layout_progress_stub); |
| if (progressBarStub != null) { |
| progressBarStub.inflate(); |
| } |
| setColor(mColor); |
| } |
| return peekProgressBar(); |
| } |
| |
| /** |
| * Gets the progress bar in the layout only if it has been installed. |
| * {@link #setShown(boolean)} should be called before this to ensure the progress bar |
| * is set up correctly. |
| * |
| * @return The progress bar of this layout, or null if the progress bar is not installed. The |
| * null case can happen either if {@link #setShown(boolean)} with true was |
| * not called before this, or if the template does not contain a progress bar. |
| */ |
| public ProgressBar peekProgressBar() { |
| return (ProgressBar) mTemplateLayout.findManagedViewById(R.id.suw_layout_progress); |
| } |
| |
| /** |
| * Sets the color of the indeterminate progress bar. This method is a no-op on SDK < 21. |
| */ |
| public void setColor(@Nullable ColorStateList color) { |
| mColor = color; |
| if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) { |
| final ProgressBar bar = peekProgressBar(); |
| if (bar != null) { |
| bar.setIndeterminateTintList(color); |
| if (Build.VERSION.SDK_INT >= VERSION_CODES.M || color != null) { |
| // There is a bug in Lollipop where setting the progress tint color to null |
| // will crash with "java.lang.NullPointerException: Attempt to invoke virtual |
| // method 'int android.graphics.Paint.getAlpha()' on a null object reference" |
| // at android.graphics.drawable.NinePatchDrawable.draw(:250) |
| // The bug doesn't affect ProgressBar on M because it uses ShapeDrawable instead |
| // of NinePatchDrawable. (commit 6a8253fdc9f4574c28b4beeeed90580ffc93734a) |
| bar.setProgressBackgroundTintList(color); |
| } |
| } |
| } |
| } |
| |
| /** |
| * @return The color previously set in {@link #setColor(ColorStateList)}, or null if the color |
| * is not set. In case of null, the color of the progress bar will be inherited from the theme. |
| */ |
| @Nullable |
| public ColorStateList getColor() { |
| return mColor; |
| } |
| } |