139 lines
5.3 KiB
Java
139 lines
5.3 KiB
Java
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2015 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.util;
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import android.animation.Animator;
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import android.animation.AnimatorSet;
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import android.animation.TypeEvaluator;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Matrix;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.view.View;
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/**
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* Static utility methods for Transitions.
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*
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* @hide
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*/
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public class TransitionUtils {
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private static int MAX_IMAGE_SIZE = (1024 * 1024);
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private TransitionUtils() {
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}
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static Animator mergeAnimators(Animator animator1, Animator animator2) {
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if (animator1 == null) {
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return animator2;
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} else if (animator2 == null) {
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return animator1;
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} else {
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AnimatorSet animatorSet = new AnimatorSet();
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animatorSet.playTogether(animator1, animator2);
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return animatorSet;
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}
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}
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/**
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* Get a copy of bitmap of given drawable, return null if intrinsic size is zero
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*/
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public static Bitmap createDrawableBitmap(Drawable drawable) {
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int width = drawable.getIntrinsicWidth();
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int height = drawable.getIntrinsicHeight();
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if (width <= 0 || height <= 0) {
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return null;
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}
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float scale = Math.min(1f, ((float) MAX_IMAGE_SIZE) / (width * height));
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if (drawable instanceof BitmapDrawable && scale == 1f) {
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// return same bitmap if scale down not needed
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return ((BitmapDrawable) drawable).getBitmap();
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}
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int bitmapWidth = (int) (width * scale);
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int bitmapHeight = (int) (height * scale);
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Bitmap bitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888);
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Canvas canvas = new Canvas(bitmap);
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Rect existingBounds = drawable.getBounds();
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int left = existingBounds.left;
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int top = existingBounds.top;
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int right = existingBounds.right;
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int bottom = existingBounds.bottom;
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drawable.setBounds(0, 0, bitmapWidth, bitmapHeight);
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drawable.draw(canvas);
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drawable.setBounds(left, top, right, bottom);
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return bitmap;
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}
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/**
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* Creates a Bitmap of the given view, using the Matrix matrix to transform to the local
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* coordinates. <code>matrix</code> will be modified during the bitmap creation.
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* <p/>
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* <p>If the bitmap is large, it will be scaled uniformly down to at most 1MB size.</p>
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*
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* @param view The view to create a bitmap for.
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* @param matrix The matrix converting the view local coordinates to the coordinates that
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* the bitmap will be displayed in. <code>matrix</code> will be modified before
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* returning.
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* @param bounds The bounds of the bitmap in the destination coordinate system (where the
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* view should be presented. Typically, this is matrix.mapRect(viewBounds);
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* @return A bitmap of the given view or null if bounds has no width or height.
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*/
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public static Bitmap createViewBitmap(View view, Matrix matrix, RectF bounds) {
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Bitmap bitmap = null;
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int bitmapWidth = Math.round(bounds.width());
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int bitmapHeight = Math.round(bounds.height());
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if (bitmapWidth > 0 && bitmapHeight > 0) {
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float scale = Math.min(1f, ((float) MAX_IMAGE_SIZE) / (bitmapWidth * bitmapHeight));
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bitmapWidth *= scale;
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bitmapHeight *= scale;
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matrix.postTranslate(-bounds.left, -bounds.top);
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matrix.postScale(scale, scale);
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bitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888);
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Canvas canvas = new Canvas(bitmap);
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canvas.concat(matrix);
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view.draw(canvas);
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}
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return bitmap;
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}
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public static class MatrixEvaluator implements TypeEvaluator<Matrix> {
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float[] mTempStartValues = new float[9];
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float[] mTempEndValues = new float[9];
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Matrix mTempMatrix = new Matrix();
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@Override
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public Matrix evaluate(float fraction, Matrix startValue, Matrix endValue) {
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startValue.getValues(mTempStartValues);
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endValue.getValues(mTempEndValues);
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for (int i = 0; i < 9; i++) {
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float diff = mTempEndValues[i] - mTempStartValues[i];
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mTempEndValues[i] = mTempStartValues[i] + (fraction * diff);
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}
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mTempMatrix.setValues(mTempEndValues);
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return mTempMatrix;
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}
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}
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}
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