Android控件开发之Gallery3D酷炫效果（带源码），稳进大厂
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// TODO Auto-generated method stub
return Integer.MAX_VALUE;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return filmList.get(position);
// return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position % filmList.size();
// return position;
}
@Override
public View getCoverFlowItem(int position, View reusableView,
ViewGroup parent) {
ImageView imageView = (ImageView) reusableView;
if (imageView == null) {
imageView = new ImageView(context);
}
Resources re = context.getResources();
InputStream is = re.openRawResource(filmList.get(position%filmList.size()).getRs());
// InputStream is = re.openRawResource(mImagesId[position%mImagesId.length]);
BitmapDrawable mapdraw = new BitmapDrawable(is);
Bitmap bitmap = mapdraw.getBitmap();
imageView.setImageBitmap(BitmapUtil.createReflectedBitmap(bitmap));
// imageView.setImageBitmap(bitmap);
// ps.电影海报宽高比例一般为3：4
imageView.setLayoutParams(new Gallery.LayoutParams(410, 713));
// // 异步加载图片
// imageLoader.displayImage(filmList.get(position % filmList.size())
// .getFilmImageLink(), imageView, options);
imageView.setScaleType(ScaleType.CENTER_CROP);
return imageView;
}
public Integer[] getImagesId(){
return mImagesId;
}
public void setImagesId(Integer[] mImagesId){
this.mImagesId = mImagesId;
}
private Integer mImagesId[] = {
R.drawable.ic_1,
R.drawable.ic_3,
R.drawable.ic_2,
R.drawable.ic_4,
R.drawable.ic_5
};
三：gallery 控件类
缩放，还有透明，等等都在这里设置
public class FancyCoverFlow extends Gallery {
public static final int ACTION_DISTANCE_AUTO = Integer.MAX_VALUE;
/**
- 图片向上突出，可以通过代码控制，也可以在xml上控制
*/
public static final float SCALEDOWN_GRAVITY_TOP = 0.0f;
/**
- 图片中间突出
*/
public static final float SCALEDOWN_GRAVITY_CENTER = 0.5f;
/**
- 图片向下突出
*/
public static final float SCALEDOWN_GRAVITY_BOTTOM = 1.0f;
private float reflectionRatio = 0.3f;
private int reflectionGap = 4;
private boolean reflectionEnabled = false;
private float unselectedAlpha;
private Camera transformationCamera;
private int maxRotation = 0;
private float unselectedScale;
private float scaleDownGravity = SCALEDOWN_GRAVITY_CENTER;
private int actionDistance;
private float unselectedSaturation;
public FancyCoverFlow(Context context) {
super(context);
this.initialize();
}
public FancyCoverFlow(Context context, AttributeSet attrs) {
super(context, attrs);
this.initialize();
this.applyXmlAttributes(attrs);
}
@SuppressLint(“NewApi”)
public FancyCoverFlow(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
if (Build.VERSION.SDK_INT >= 11) {
this.setLayerType(LAYER_TYPE_SOFTWARE, null);
}
this.initialize();
this.applyXmlAttributes(attrs);
}
private void initialize() {
this.transformationCamera = new Camera();
this.setSpacing(0);
}
private void applyXmlAttributes(AttributeSet attrs) {
TypedArray a = getContext().obtainStyledAttributes(attrs,
R.styleable.FancyCoverFlow);
this.actionDistance = a
.getInteger(R.styleable.FancyCoverFlow_actionDistance,
ACTION_DISTANCE_AUTO);
this.scaleDownGravity = a.getFloat(
R.styleable.FancyCoverFlow_scaleDownGravity, 0.5f);
this.maxRotation = a.getInteger(R.styleable.FancyCoverFlow_maxRotation,
0);
this.unselectedAlpha = a.getFloat(
R.styleable.FancyCoverFlow_unselectedAlpha, 0.5f);
this.unselectedSaturation = a.getFloat(
R.styleable.FancyCoverFlow_unselectedSaturation, 0.0f);
this.unselectedScale = a.getFloat(
R.styleable.FancyCoverFlow_unselectedScale, 0.75f);
}
public float getReflectionRatio() {
return reflectionRatio;
}
public void setReflectionRatio(float reflectionRatio) {
if (reflectionRatio <= 0 || reflectionRatio > 0.5f) {
throw new IllegalArgumentException(
“reflectionRatio may only be in the interval (0, 0.5]”);
}
this.reflectionRatio = reflectionRatio;
if (this.getAdapter() != null) {
((FancyCoverFlowAdapter) this.getAdapter()).notifyDataSetChanged();
}
}
public int getReflectionGap() {
return reflectionGap;
}
public void setReflectionGap(int reflectionGap) {
this.reflectionGap = reflectionGap;
if (this.getAdapter() != null) {
((FancyCoverFlowAdapter) this.getAdapter()).notifyDataSetChanged();
}
}
public boolean isReflectionEnabled() {
return reflectionEnabled;
}
public void setReflectionEnabled(boolean reflectionEnabled) {
this.reflectionEnabled = reflectionEnabled;
if (this.getAdapter() != null) {
((FancyCoverFlowAdapter) this.getAdapter()).notifyDataSetChanged();
}
}
@Override
public void setAdapter(SpinnerAdapter adapter) {
if (!(adapter instanceof FancyCoverFlowAdapter)) {
throw new ClassCastException(FancyCoverFlow.class.getSimpleName()
-
" only works in conjunction with a "
-
FancyCoverFlowAdapter.class.getSimpleName());
}
super.setAdapter(adapter);
}
public int getMaxRotation() {
return maxRotation;
}
public void setMaxRotation(int maxRotation) {
this.maxRotation = maxRotation;
}
public float getUnselectedAlpha() {
return this.unselectedAlpha;
}
public float getUnselectedScale() {
return unselectedScale;
}
public void setUnselectedScale(float unselectedScale) {
this.unselectedScale = unselectedScale;
}
public float getScaleDownGravity() {
return scaleDownGravity;
}
public void setScaleDownGravity(float scaleDownGravity) {
this.scaleDownGravity = scaleDownGravity;
}
public int getActionDistance() {
return actionDistance;
}
public void setActionDistance(int actionDistance) {
this.actionDistance = actionDistance;
}
@Override
public void setUnselectedAlpha(float unselectedAlpha) {
super.setUnselectedAlpha(unselectedAlpha);
this.unselectedAlpha = unselectedAlpha;
}
public float getUnselectedSaturation() {
return unselectedSaturation;
}
public void setUnselectedSaturation(float unselectedSaturation) {
this.unselectedSaturation = unselectedSaturation;
}
public int preLeftOffset = 0;
public int count = 0;
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ublic boolean isPlayDraw = true;
@Override
protected boolean getChildStaticTransformation(View child, Transformation t) {
FancyCoverFlowItemWrapper item = (FancyCoverFlowItemWrapper) child;
preLeftOffset = getChildAt(0).getLeft();
if (android.os.Build.VERSION.SDK_INT >= 16) {
item.postInvalidate();
}
final int coverFlowWidth = this.getWidth();
final int coverFlowCenter = coverFlowWidth / 2;
final int childWidth = item.getWidth();
final int childHeight = item.getHeight();
final int childCenter = item.getLeft() + childWidth / 2;
-
final int actionDistance = (this.actionDistance == ACTION_DISTANCE_AUTO) ? (int) ((coverFlowWidth + childWidth) / 2.0f)
- this.actionDistance;
float effectsAmount = Math.min(
1.0f,
Math.max(-1.0f, (1.0f / actionDistance)
- (childCenter - coverFlowCenter)));
t.clear();
t.setTransformationType(Transformation.TYPE_BOTH);
if (this.unselectedAlpha != 1) {
final float alphaAmount = (this.unselectedAlpha - 1)
- Math.abs(effectsAmount) + 1;
t.setAlpha(alphaAmount);
}
if (this.unselectedSaturation != 1) {
// Pass over saturation to the wrapper.
final float saturationAmount = (this.unselectedSaturation - 1)
- Math.abs(effectsAmount) + 1;
item.setSaturation(saturationAmount);
}
final Matrix imageMatrix = t.getMatrix();
// 旋转角度不为0则开始图片旋转.
if (this.maxRotation != 0) {
final int rotationAngle = (int) (-effectsAmount * this.maxRotation);
this.transformationCamera.save();
this.transformationCamera.rotateY(rotationAngle);
this.transformationCamera.getMatrix(imageMatrix);
this.transformationCamera.restore();
}
// 缩放.
if (this.unselectedScale != 1) {
final float zoomAmount = 1f / 2f * (1 - Math.abs(effectsAmount))
-
(1 - Math.abs(effectsAmount))
-
(1 - Math.abs(effectsAmount)) + 0.5f;
final float translateX = childWidth / 2.0f;
final float translateY = childHeight * this.scaleDownGravity;
imageMatrix.preTranslate(-translateX, -translateY);
imageMatrix.postScale(zoomAmount, zoomAmount);
imageMatrix.postTranslate(translateX, translateY);
if (effectsAmount != 0) {
double point = 0.4;
double translateFactor = (-1f / (point * point)
-
(Math.abs(effectsAmount) - point)
-
(Math.abs(effectsAmount) - point) + 1)
-
(effectsAmount > 0 ? 1 : -1);
imageMatrix
.postTranslate(
(float) (ViewUtil.Dp2Px(getContext(), 25) * translateFactor),
0);
}
}
return true;
}
// 绘制顺序，先从左到中间，再从右到中间
@Override
protected int getChildDrawingOrder(int childCount, int i) {
int selectedIndex = getSelectedItemPosition()
- getFirstVisiblePosition();
if (i < selectedIndex) {
return i;
} else if (i >= selectedIndex) {
return childCount - 1 - i + selectedIndex;
} else {
return i;
}
}
private boolean isTouchAble = true;
public void disableTouch() {
isTouchAble = false;
}
public void enableTouch() {
isTouchAble = true;
}
public boolean isTouchAble() {
return isTouchAble;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
count = 0;
for (int i = 0; i < getChildCount(); i++) {
getChildAt(i).invalidate();
}
if (isTouchAble) {
return super.onTouchEvent(event);
} else {
return false;
}
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
if (isTouchAble) {
return super.onInterceptTouchEvent(event);
} else {
return true;
}
}
//
// @Override
// public boolean onSingleTapUp(MotionEvent e) {
// return false;
标签：稳进,控件,return,int,void,float,final,源码,public 来源： https://blog.csdn.net/flutter001/article/details/122169633