我在项目中使用了RecyclerView
,但是在应用程序运行时自动更改RecyclerView
项的时候遇到了问题。
这是我的ArrayList
,当应用程序启动时,RecylcerView
会显示mResIds
:
List<StickerView> mStickers = new ArrayList<>();
int[] mResIds = new int[]{R.mipmap.ic_sticker_01, R.mipmap.ic_sticker_02}
int[] mLocIds = new int[]{R.mipmap.ic_sticker_03, R.mipmap.ic_sticker_04}
但我希望当我动态地按下图像按钮时,能够改变这些项目的 mLocIds
。
这是我的另一段 RecyclerView
代码:
private void initEvent() {
mGalleryAdapter.setOnItemClickListener(new GalleryAdapter.OnRecyclerViewItemClickListener() {
@Override
public void onItemClick(View view, int resId) {
addStickerItem(resId);
}
});
}
添加 Sticker
:
private void addStickerItem(int resId) {
resetStickersFocus();
StickerView stickerView = new StickerView(this);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
params.addRule(RelativeLayout.ALIGN_BOTTOM, R.id.image);
params.addRule(RelativeLayout.ALIGN_TOP, R.id.image);
((ViewGroup) mImageView.getParent()).addView(stickerView, params);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), resId);
stickerView.setWaterMark(bitmap);
mStickers.add(stickerView);
stickerView.setOnStickerDeleteListener(new StickerView.OnStickerDeleteListener() {
@Override
public void onDelete(StickerView stickerView) {
if (mStickers.contains(stickerView))
mStickers.remove(stickerView);
}
});
}
重置焦点项:
private void resetStickersFocus() {
for (StickerView stickerView : mStickers) {
stickerView.setFocusable(false);
}
}
其他用途:
private void initView() {
mStatusBarHeight = getStatusBarHeight();
mToolBarHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, getResources().getDisplayMetrics());
mToolbar = (Toolbar) findViewById(R.id.toolbar);
setUpToolbar();
mImageView = (ImageView) findViewById(R.id.image);
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mEffectImg = (ImageView) findViewById(R.id.effect_image);
mGalleryAdapter = new GalleryAdapter(mResIds);
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
mRecyclerView.setLayoutManager(layoutManager);
mRecyclerView.setAdapter(mGalleryAdapter);
}
这是我的onCreate
方法:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.pht);
initView();
initEvent();
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mImageView = (ImageView) findViewById(R.id.effect_image);
btnFab = (FloatingActionButton) findViewById(R.id.btnFloatingAction);
}
基本上,当我单击 btnFab
按钮并调用 onClick
时,我想将我的 RecylerView
项的 mResIds
更改为 mLocIds
。