Gallery onKeyDown 按钮点击切换上一页下一页可以保留动画效果，但一些属性会使切换不

来自：http://www.eoeandroid.com/blog-136532-4536.html

切换：

prePage.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

gallery.onKeyDown(KeyEvent.KEYCODE_DPAD_LEFT, null);

}

});

nextPage.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

gallery.onKeyDown(KeyEvent.KEYCODE_DPAD_RIGHT, null);

}

});

}

如果在代码调用了gallery.setSpacing(2)；这样的设置，会使prePage和nextPage中的onKeyDown失效。

如果想保留gallery.setSpacing( SPACING ),可以修改为

private static final int SPACING = 2;

prePage.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

dishGallery.onScroll(null, null, -1*(SPACING+1), 0);

dishGallery.onKeyDown(KeyEvent.KEYCODE_DPAD_LEFT, null);

}

});

nextPage.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

dishGallery.onScroll(null, null, SPACING+1, 0);

dishGallery.onKeyDown(KeyEvent.KEYCODE_DPAD_RIGHT, null);

}

});

}