Question

我正在尝试将一个OnItemClickListener添加到android的coverflow应用程序，其中图像可以来回滚动，我要添加的部分是一个点击监听器，所以你可以点击其中一个图像然后转到另一项活动。我猜它的工作原理与你将OnItemClick添加到listview或填充图像的gridview相同。我知道之前已经提出过这个问题，但是这种情况有所不同。应用程序中还有其他代码没有意义。这里是代码来自http://www.inter-fuser.com/2010/01/android-coverflow-widget.html的地方，这个应用程序有以下四个java类：

CoverFlow.java //扩展CoverAbsSpinner并实现GestureDetector.OnGestureListener

CoverAdapterView.java //类扩展了Adapter和ViewGroup类

CoverAbsSpinner.java //此类扩展了CoverAdapterView.java

CoverFlowExample.java //扩展活动

奇怪的是，我在CoverAdapterView.java类中找到了下面显示的代码。将看起来像无用接口的东西放在课堂中间是没有意义的。并且它说＆＃34;当单击此AdapterView中的项目时调用的回调方法。＆＃34;

这是该方法的奥秘。你怎么打电话＆＃34;这个？他们真的准备了OnItemClickListener吗？我会覆盖这件事还是什么？

并且由于此代码尚未理解？有谁知道这是什么目的？它是一个你必须实现或覆盖的接口。所以我质疑这个目的。

public interface OnItemClickListener {

    /**
     * Callback method to be invoked when an item in this AdapterView has
     * been clicked.
     * <p>
     * Implementers can call getItemAtPosition(position) if they need
     * to access the data associated with the selected item.
     *
     * @param parent The AdapterView where the click happened.
     * @param view The view within the AdapterView that was clicked (this
     *            will be a view provided by the adapter)
     * @param position The position of the view in the adapter.
     * @param id The row id of the item that was clicked.
     */
    void onItemClick(CoverAdapterView<?> parent, View view, int position, long id);


}
/**
 * Register a callback to be invoked when an item in this AdapterView has
 * been clicked.
 *
 * @param listener The callback that will be invoked.
 */
public void setOnItemClickListener(OnItemClickListener listener) {
    mOnItemClickListener = listener;
}

/**
 * @return The callback to be invoked with an item in this AdapterView has
 *         been clicked, or null id no callback has been set.
 */
public final OnItemClickListener getOnItemClickListener() {
    return mOnItemClickListener;
}

/**
 * Call the OnItemClickListener, if it is defined.
 *
 * @param view The view within the AdapterView that was clicked.
 * @param position The position of the view in the adapter.
 * @param id The row id of the item that was clicked.
 * @return True if there was an assigned OnItemClickListener that was
 *         called, false otherwise is returned.

Answer 1

用于coverflow点击监听器的

coverFlow.setOnItemClickListener(new OnItemClickListener() 
{
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
    {
        switch(position) 
        {
            case 0:
                startActivity(new Intent(****.this,@@@@.class));
                finish();
                break;
            case 1:
                startActivity(new Intent(****.this, ####.class));
                finish();
                break;
            case 2:
                startActivity(new Intent(****.this, &&&&.class));
                finish();
                break;

        }
    }
});

神秘的未知外星人界面为OnItemClickListener，如何实现

1 个答案: