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/* * Copyright 2013 Chris Banes// w w w . j a v a 2 s .com * * 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 uk.co.senab.actionbarpulltorefresh.library; import android.app.Activity; import android.content.Context; import android.content.res.TypedArray; import android.graphics.PixelFormat; import android.graphics.PorterDuff; import android.graphics.drawable.Drawable; import android.os.Build; import android.util.TypedValue; import android.view.View; import android.view.ViewGroup; import android.view.animation.AccelerateInterpolator; import android.view.animation.AnimationUtils; import android.view.animation.Interpolator; import android.widget.ProgressBar; import android.widget.TextView; /** * Default Header Transformer. */ public class DefaultHeaderTransformer extends PullToRefreshAttacher.HeaderTransformer { private ViewGroup mContentLayout; private TextView mHeaderTextView; private ProgressBar mHeaderProgressBar; private CharSequence mPullRefreshLabel, mRefreshingLabel, mReleaseLabel; private boolean mUseCustomProgressColor = false; private int mProgressDrawableColor; private final Interpolator mInterpolator = new AccelerateInterpolator(); protected DefaultHeaderTransformer() { final int min = getMinimumApiLevel(); if (Build.VERSION.SDK_INT < min) { throw new IllegalStateException("This HeaderTransformer is designed to run on SDK " + min + "+. If using ActionBarSherlock or ActionBarCompat you should use the appropriate provided extra."); } } @Override public void onViewCreated(Activity activity, View headerView) { // Get ProgressBar and TextView. Also set initial text on TextView mHeaderProgressBar = (ProgressBar) headerView.findViewById(R.id.ptr_progress); mHeaderTextView = (TextView) headerView.findViewById(R.id.ptr_text); // Apply any custom ProgressBar colors applyProgressBarColor(); // Labels to display mPullRefreshLabel = activity.getString(R.string.pull_to_refresh_pull_label); mRefreshingLabel = activity.getString(R.string.pull_to_refresh_refreshing_label); mReleaseLabel = activity.getString(R.string.pull_to_refresh_release_label); // Retrieve the Action Bar size from the Activity's theme mContentLayout = (ViewGroup) headerView.findViewById(R.id.ptr_content); if (mContentLayout != null) { mContentLayout.getLayoutParams().height = getActionBarSize(activity); mContentLayout.requestLayout(); } // Retrieve the Action Bar background from the Activity's theme (see #93). Drawable abBg = getActionBarBackground(activity); if (abBg != null) { // If we do not have a opaque background we just display a solid solid behind it if (abBg.getOpacity() != PixelFormat.OPAQUE) { View view = headerView.findViewById(R.id.ptr_text_opaque_bg); if (view != null) { view.setVisibility(View.VISIBLE); } } mHeaderTextView.setBackgroundDrawable(abBg); } // Retrieve the Action Bar Title Style from the Action Bar's theme Context abContext = headerView.getContext(); final int titleTextStyle = getActionBarTitleStyle(abContext); if (titleTextStyle != 0) { mHeaderTextView.setTextAppearance(abContext, titleTextStyle); } // Call onReset to make sure that the View is consistent onReset(); } @Override public void onReset() { // Reset Progress Bar if (mHeaderProgressBar != null) { mHeaderProgressBar.setVisibility(View.GONE); mHeaderProgressBar.setProgress(0); mHeaderProgressBar.setIndeterminate(false); } // Reset Text View if (mHeaderTextView != null) { mHeaderTextView.setVisibility(View.VISIBLE); mHeaderTextView.setText(mPullRefreshLabel); } // Reset the Content Layout if (mContentLayout != null) { mContentLayout.setVisibility(View.VISIBLE); } } @Override public void onPulled(float percentagePulled) { if (mHeaderProgressBar != null) { mHeaderProgressBar.setVisibility(View.VISIBLE); final float progress = mInterpolator.getInterpolation(percentagePulled); mHeaderProgressBar.setProgress(Math.round(mHeaderProgressBar.getMax() * progress)); } } @Override public void onRefreshStarted() { if (mHeaderTextView != null) { mHeaderTextView.setText(mRefreshingLabel); } if (mHeaderProgressBar != null) { mHeaderProgressBar.setVisibility(View.VISIBLE); mHeaderProgressBar.setIndeterminate(true); } } @Override public void onReleaseToRefresh() { if (mHeaderTextView != null) { mHeaderTextView.setText(mReleaseLabel); } if (mHeaderProgressBar != null) { mHeaderProgressBar.setProgress(mHeaderProgressBar.getMax()); } } @Override public void onRefreshMinimized() { // Here we fade out most of the header, leaving just the progress bar if (mContentLayout != null) { mContentLayout.startAnimation(AnimationUtils .loadAnimation(mContentLayout.getContext(), R.anim.fade_out)); mContentLayout.setVisibility(View.INVISIBLE); } } /** * Set color to apply to the progress bar. Automatically enables usage of the custom color. Use * {@link #setProgressBarColorEnabled(boolean)} to disable and re-enable the custom color usage. * <p/> * The best way to apply a color is to load the color from resources: {@code * setProgressBarColor(getResources().getColor(R.color.your_color_name))}. * * @param color The color to use. */ public void setProgressBarColor(int color) { mProgressDrawableColor = color; setProgressBarColorEnabled(true); } /** * Enable or disable the use of a custom progress bar color. You can set what color to use with * {@link #setProgressBarColor(int)}, which also automatically enables custom color usage. */ public void setProgressBarColorEnabled(boolean enabled) { mUseCustomProgressColor = enabled; applyProgressBarColor(); } /** * Set Text to show to prompt the user is pull (or keep pulling). * * @param pullText - Text to display. */ public void setPullText(CharSequence pullText) { mPullRefreshLabel = pullText; if (mHeaderTextView != null) { mHeaderTextView.setText(mPullRefreshLabel); } } /** * Set Text to show to tell the user that a refresh is currently in progress. * * @param refreshingText - Text to display. */ public void setRefreshingText(CharSequence refreshingText) { mRefreshingLabel = refreshingText; } /** * Set Text to show to tell the user has scrolled enough to refresh. * * @param releaseText - Text to display. */ public void setReleaseText(CharSequence releaseText) { mReleaseLabel = releaseText; } private void applyProgressBarColor() { if (mHeaderProgressBar != null) { if (mUseCustomProgressColor) { mHeaderProgressBar.getProgressDrawable() .setColorFilter(mProgressDrawableColor, PorterDuff.Mode.SRC_ATOP); mHeaderProgressBar.getIndeterminateDrawable() .setColorFilter(mProgressDrawableColor, PorterDuff.Mode.SRC_ATOP); } else { mHeaderProgressBar.getProgressDrawable().clearColorFilter(); mHeaderProgressBar.getIndeterminateDrawable().clearColorFilter(); } } } protected Drawable getActionBarBackground(Context context) { int[] android_styleable_ActionBar = {android.R.attr.background}; // Need to get resource id of style pointed to from actionBarStyle TypedValue outValue = new TypedValue(); context.getTheme().resolveAttribute(android.R.attr.actionBarStyle, outValue, true); // Now get action bar style values... TypedArray abStyle = context.getTheme().obtainStyledAttributes(outValue.resourceId, android_styleable_ActionBar); try { // background is the first attr in the array above so it's index is 0. return abStyle.getDrawable(0); } finally { abStyle.recycle(); } } protected int getActionBarSize(Context context) { int[] attrs = {android.R.attr.actionBarSize}; TypedArray values = context.getTheme().obtainStyledAttributes(attrs); try { return values.getDimensionPixelSize(0, 0); } finally { values.recycle(); } } protected int getActionBarTitleStyle(Context context) { int[] android_styleable_ActionBar = {android.R.attr.titleTextStyle}; // Need to get resource id of style pointed to from actionBarStyle TypedValue outValue = new TypedValue(); context.getTheme().resolveAttribute(android.R.attr.actionBarStyle, outValue, true); // Now get action bar style values... TypedArray abStyle = context.getTheme().obtainStyledAttributes(outValue.resourceId, android_styleable_ActionBar); try { // titleTextStyle is the first attr in the array above so it's index is 0. return abStyle.getResourceId(0, 0); } finally { abStyle.recycle(); } } protected int getMinimumApiLevel() { return Build.VERSION_CODES.ICE_CREAM_SANDWICH; } }