ImageCoverFlow

开源源码详见：https://github.com/dolphinwang/ImageCoverFlow

在智能跑步机上使用效果图：

How to Use:

Step One: Add CoverFlowView to your project

1. Via XML:

<com.dolphinwang.imagecoverflow.CoverFlowView
    xmlns:imageCoverFlow="http://schemas.android.com/apk/res-auto"
    android:id="@+id/coverflow"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="20dp"
    android:paddingRight="20dp"
    imageCoverFlow:coverflowGravity="center_vertical"
    imageCoverFlow:coverflowLayoutMode="wrap_content"
    imageCoverFlow:enableReflection="true"
    imageCoverFlow:reflectionGap="10dp"
    imageCoverFlow:reflectionHeight="30%"
    imageCoverFlow:reflectionShaderEnable="true"
    imageCoverFlow:visibleImage="5" />

1. Programatically (via Java):

CoverFlowView<MyCoverFlowAdapter> mCoverFlowView =
    (CoverFlowView<MyCoverFlowAdapter>) findViewById(R.id.coverflow);

mCoverFlowView.setCoverFlowGravity(CoverFlowGravity.CENTER_VERTICAL);
mCoverFlowView.setCoverFlowLayoutMode(CoverFlowLayoutMode.WRAP_CONTENT);
mCoverFlowView.enableReflection(true);
mCoverFlowView.setReflectionHeight(30);
mCoverFlowView.setReflectionGap(20);
mCoverFlowView.enableReflectionShader(true);
mCoverFlowView.setVisibleImage(5);

TIP: If you want to support different movement speeds on different screen densities, you can use method setScreenDensity(). Otherwise CoverFlow will have a unified movement speed.

Step Two: Set an adapter, which extends CoverFlowAdapter:

MyCoverFlowAdapter adapter = new MyCoverFlowAdapter(this);
mCoverFlowView.setAdapter(adapter);

TIPS:

• Method setAdapter() should be called after all properties of CoverFlow are settled.
• If you want to load image dynamically, you can call method notifyDataSetChanged() when bitmaps are loaded.

Step Three: if you want to listen for the click event of the top image, you can set aCoverFlowListener to it:

mCoverFlowView.setCoverFlowListener(new CoverFlowListener<MyCoverFlowAdapter>() {
    @Override
    public void imageOnTop(CoverFlowView<MyCoverFlowAdapter> view, int position,
            float left, float top, float right,float bottom) {
        // TODO
    }

    @Override
    public void topImageClicked(CoverFlowView<MyCoverFlowAdapter> view, int position) {
        // TODO
    }
});

If you want to listen for long click events of the top image, you can set a TopImageLongClickListener to it:

mCoverFlowView
    .setTopImageLongClickListener(new CoverFlowView.TopImageLongClickListener() {
        @Override
        public void onLongClick(int position) {
            Log.e(VIEW_LOG_TAG, "top image long clicked ==> " + position);
        }
    });

Users can use method setSelection() to show a specific position at the top.

If you want to subclass CoverFlowView

1. You can override method getCustomTransformMatrix() to make more transformations for images (there is some annotated code which shows how to make image y-axis rotation).
2. You should never override method onLayout() to layout any of CoverFlowView’s children, because all of image will draw on the canvas directly.