3D呈立体形状旋转效果的Gallery

package com.gallery; import android.content.Context; import android.graphics.Camera; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.Path; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.view.animation.Transformation; import android.widget.Gallery; import android.widget.ImageView; public class GalleryFlow extends Gallery { private Camera mCamera = new Camera(); private int mMaxRotationAngle = 90; private int mMaxZoom = -110; private int mCoveflowCenter; public GalleryFlow(Context context) { super(context); this.setStaticTransformationsEnabled(true); } public GalleryFlow(Context context, AttributeSet attrs) { super(context, attrs); this.setStaticTransformationsEnabled(true); } public GalleryFlow(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); this.setStaticTransformationsEnabled(true); } public int getMaxRotationAngle() { return mMaxRotationAngle; } public void setMaxRotationAngle(int maxRotationAngle) { mMaxRotationAngle = maxRotationAngle; } public int getMaxZoom() { return mMaxZoom; } public void setMaxZoom(int maxZoom) { mMaxZoom = maxZoom; } private int getCenterOfCoverflow() { return (getWidth() - getPaddingLeft() - getPaddingRight()) / 2 + getPaddingLeft(); } private static int getCenterOfView(View view) { return view.getLeft() + view.getWidth() / 2; } protected boolean getChildStaticTransformation(View child, Transformation t) { final int childCenter = getCenterOfView(child); final int childWidth = child.getWidth(); int rotationAngle = 0; t.clear(); t.setTransformationType(Transformation.TYPE_MATRIX); if (childCenter == mCoveflowCenter) { transformImageBitmap((ImageView) child, t, 0); } else { rotationAngle = (int) (((float) (mCoveflowCenter - childCenter) / childWidth) * mMaxRotationAngle); if (Math.abs(rotationAngle) > mMaxRotationAngle) { rotationAngle = (rotationAngle < 0) ? -mMaxRotationAngle : mMaxRotationAngle; } transformImageBitmap((ImageView) child, t, rotationAngle); } return true; } protected void onSizeChanged(int w, int h, int oldw, int oldh) { mCoveflowCenter = getCenterOfCoverflow(); super.onSizeChanged(w, h, oldw, oldh); } private void transformImageBitmap(ImageView child, Transformation t, 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, 60.0f); // As the angle of the view gets less, zoom in if (rotation < mMaxRotationAngle) { float zoomAmount = (float) (mMaxZoom + (rotation * 1.5)); mCamera.translate(0.0f, 0.0f, zoomAmount); } mCamera.rotateY(-rotationAngle); mCamera.getMatrix(imageMatrix); imageMatrix.preTranslate(-(imageWidth / 2), -(imageHeight / 2)); imageMatrix.postTranslate((imageWidth / 2), (imageHeight / 2)); mCamera.restore(); if(changed){ // 保证在滑动的时候不会恢复坐标 int[] location = new int[2]; child.getLocationOnScreen(location); int x = location[0]; int y = location[1]; left_move_x = x - imageWidth / 4; left_move_y = y - (imageHeight / 8); left_line_x_01 = left_move_x * 2; left_line_y_01 = left_move_y + 20; left_line_x_02 = left_line_x_01; left_line_y_02 = left_line_y_01 + (imageHeight / 3); left_line_x_03 = left_move_x; left_line_y_03 = left_line_y_02 + 20; right_move_x = x + (imageWidth + imageWidth / 3); right_move_y = y - (imageHeight / 8); right_line_x_01 = right_move_x - imageWidth / 2; right_line_y_01 = left_move_y + 20; right_line_x_02 = right_line_x_01; right_line_y_02 = right_line_y_01 + (imageHeight / 3); right_line_x_03 = right_move_x; right_line_y_03 = right_line_y_02 + 20; moveLeftX = left_move_x - 10; moveRightX = right_move_x + 10; moveLineLeftX = left_move_x; moveLineRightX = right_move_x; onDraw(new Canvas()); } } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { return false; } @Override public boolean onTouchEvent(MotionEvent event) { switch(event.getAction()) { case MotionEvent.ACTION_DOWN: eventX = event.getX(); changed = false; break; case MotionEvent.ACTION_UP: changed = true; break; case MotionEvent.ACTION_MOVE: // if (event.getX() > eventX) { // to right // if(left_move_x > moveLeftX) { // --left_move_x; // --left_line_x_03; // // --right_move_x; // --right_line_x_03; // } // if(left_line_x_01 > moveLineLeftX) { // --left_line_x_01; --left_line_x_02; // --right_line_x_01; --right_line_x_02; // } // } else if (event.getX() < eventX) { // to left // if(right_move_x < moveRightX) { // ++left_move_x; // ++left_line_x_03; // // ++right_move_x; // ++right_line_x_03; // } // if(right_line_x_01 < moveLineRightX) { // ++left_line_x_01; ++left_line_x_02; // ++right_line_x_01; ++right_line_x_02; // } // } break; } return super.onTouchEvent(event); } private int left_move_x, left_move_y, left_line_x_01, left_line_x_02, left_line_x_03, left_line_y_01, left_line_y_02, left_line_y_03; private int right_move_x, right_move_y, right_line_x_01, right_line_x_02, right_line_x_03, right_line_y_01, right_line_y_02, right_line_y_03; private float eventX; private int moveLeftX, moveRightX, moveLineLeftX, moveLineRightX; private boolean changed = true; @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); Paint black = new Paint(); black.setAntiAlias(true); black.setColor(Color.GRAY); Path left=new Path(); left.moveTo(left_move_x, left_move_y); left.lineTo(left_line_x_01, left_line_y_01); left.lineTo(left_line_x_02, left_line_y_02); left.lineTo(left_line_x_03, left_line_y_03); left.close(); canvas.drawPath(left, black); Path right=new Path(); right.moveTo(right_move_x, right_move_y); right.lineTo(right_line_x_01, right_line_y_01); right.lineTo(right_line_x_02, right_line_y_02); right.lineTo(right_line_x_03, right_line_y_03); right.close(); canvas.drawPath(right, black); } }