Java tutorial
/* * Copyright (c) 2012 Wireless Designs, LLC * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.example.PagerCoverFlow; import android.content.Context; import android.graphics.Camera; import android.graphics.Matrix; import android.graphics.Point; import android.support.v4.view.ViewPager; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.widget.FrameLayout; import android.widget.ImageView; /** * PagerContainer: A layout that displays a ViewPager with its children that are outside * the typical pager bounds. */ public class PagerContainer extends FrameLayout implements ViewPager.OnPageChangeListener { private CoverFlow mPager; boolean mNeedsRedraw = false; int mCoveflowCenter; private Camera mCamera = new Camera(); private int mMaxRotationAngle = 60; private int mMaxZoom = -120; int windowWidth; int width = windowWidth - 100; public PagerContainer(Context context) { super(context); init(); } public PagerContainer(Context context, AttributeSet attrs) { super(context, attrs); init(); } public PagerContainer(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(); } private void init() { //Disable clipping of children so non-selected pages are visible setClipChildren(false); windowWidth = this.getResources().getDisplayMetrics().widthPixels; //Child clipping doesn't work with hardware acceleration in Android 3.x/4.x //You need to set this value here if using hardware acceleration in an // application targeted at these releases. // setLayerType(View.LAYER_TYPE_SOFTWARE, null); } @Override protected void onFinishInflate() { try { mPager = (CoverFlow) getChildAt(0); mPager.setOnPageChangeListener(this); } catch (Exception e) { throw new IllegalStateException("The root child of PagerContainer must be a ViewPager"); } } public CoverFlow getViewPager() { return mPager; } private Point mCenter = new Point(); private Point mInitialTouch = new Point(); @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { mCenter.x = w / 2; mCenter.y = h / 2; } @Override public boolean onTouchEvent(MotionEvent ev) { //We capture any touches not already handled by the ViewPager // to implement scrolling from a touch outside the pager bounds. switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: mInitialTouch.x = (int) ev.getX(); mInitialTouch.y = (int) ev.getY(); default: ev.offsetLocation(mCenter.x - mInitialTouch.x, mCenter.y - mInitialTouch.y); break; } return mPager.dispatchTouchEvent(ev); } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { //Force the container to redraw on scrolling. //Without this the outer pages render initially and then stay static int rotationAngle = (int) (positionOffset * mMaxRotationAngle); if (Math.abs(rotationAngle) > mMaxRotationAngle) { rotationAngle = (rotationAngle < 0) ? -mMaxRotationAngle : mMaxRotationAngle; } FrameLayout frameLayout = (FrameLayout) mPager.getChildAt(position); ImageView imageview = (ImageView) frameLayout.getChildAt(0); Log.i("Test", "positino2:" + rotationAngle); transformImageBitmap((ImageView) imageview, imageview.getImageMatrix(), rotationAngle); // Matrix m = mPager.getMatrix(); // RectF drawableRect = new RectF(0, 0, width - rotationAngle, width - rotationAngle); // RectF viewRect = new RectF(0, 0, imageview.getWidth(), imageview.getHeight()); // m.setRectToRect(drawableRect, viewRect, Matrix.ScaleToFit.CENTER); // mPager.setMa if (mNeedsRedraw) invalidate(); } @Override public void onPageSelected(int position) { Log.i("Test", "positino:" + position); } @Override public void onPageScrollStateChanged(int state) { mNeedsRedraw = (state != ViewPager.SCROLL_STATE_IDLE); } private void transformImageBitmap(ImageView child, Matrix imageMatrix, int rotationAngle) { mCamera.save(); // final Matrix imageMatrix = t.getMatrix();; final int imageHeight = child.getLayoutParams().height; final int imageWidth = child.getLayoutParams().width; final int rotation = Math.abs(rotationAngle); // mCamera.translate(0.0f, 0.0f, 100.0f); Log.i("Select", "imageWidth:" + imageWidth + " " + "imageHeight:" + imageHeight); //As the angle of the view gets less, zoom in // if ( rotation < mMaxRotationAngle ) { float zoomAmount = (float) (mMaxZoom + (rotation * 1.5)); Log.i("Select", "rotation:" + rotation + " zoomAmount:" + zoomAmount); mCamera.translate(0.0f, 0.0f, zoomAmount); } //Alpha int alphaVal = 255 - rotation * 3; // child.setAlpha(alphaVal); //[0,255] child.getDrawable().setAlpha(alphaVal); // mCamera.rotateY(rotationAngle); mCamera.getMatrix(imageMatrix); imageMatrix.preTranslate(-(imageWidth / 2), -(imageHeight / 2)); imageMatrix.postTranslate((imageWidth / 2), (imageHeight / 2)); mCamera.restore(); float[] values = new float[9]; imageMatrix.getValues(values); float globalX = values[Matrix.MTRANS_X]; float globalY = values[Matrix.MTRANS_Y]; // float width = values[Matrix.MSCALE_X]*CommonValue.menuWidth ; // float height = values[Matrix.MSCALE_Y]*CommonValue.menuWidth; values[Matrix.MSCALE_X] = 2; values[Matrix.MSCALE_Y] = 2; imageMatrix.setValues(values); } }