我写了一个小应用程序,它显示了几个带有彩色标题的android卡。
我希望能够在每张卡的右上角添加图标,就像在图像中一样到目前为止,虽然我已经找到了如下所示的截图,表明它是可能的。我没有在网上找到任何信息如何做到这一点。所以一些帮助会非常棒: - )
到目前为止我的代码如下:
CardAdapter.java
public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> {
public List<TTItem> posts = new ArrayList<>();
public void addItems(List<TTItem> items) {
posts.addAll(items);
notifyDataSetChanged();
}
public void clear() {
posts.clear();
notifyDataSetChanged();
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Context context = parent.getContext();
View view = View.inflate(context, R.layout.item_cardview, null);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.mTextView.setText(posts.get(position).title);
Picasso.with(holder.mImageView.getContext()).load(posts.get(position).images[0]).into(holder.mImageView);
}
@Override
public int getItemCount() {
return posts.size();
}
static class ViewHolder extends RecyclerView.ViewHolder {
public TextView mTextView;
public ImageView mImageView;
public ViewHolder(View view) {
super(view);
mTextView = (TextView) view.findViewById(R.id.textview);
mImageView = (ImageView) view.findViewById(R.id.imageView);
}
}
}
MainActivity.java
public class MainActivity extends ActionBarActivity implements SwipeRefreshLayout.OnRefreshListener {
@InjectView(R.id.mainView)
RecyclerView mRecyclerView;
@InjectView(R.id.refreshContainer)
SwipeRefreshLayout refreshLayout;
private LinearLayoutManager mLayoutManager;
private CardAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.inject(this);
mRecyclerView.setHasFixedSize(true);
refreshLayout.setOnRefreshListener(this);
TypedValue tv = new TypedValue();
int actionBarHeight = 0;
if (getTheme().resolveAttribute(R.attr.actionBarSize, tv, true)) {
actionBarHeight = TypedValue.complexToDimensionPixelSize(tv.data, getResources().getDisplayMetrics());
}
refreshLayout.setProgressViewEndTarget(true, actionBarHeight);
mAdapter = new CardAdapter();
mRecyclerView.setAdapter(mAdapter);
// use a linear layout manager
mLayoutManager = new GridLayoutManager(this, 1);
mRecyclerView.setLayoutManager(mLayoutManager);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
return super.onOptionsItemSelected(item);
}
@Override
public void onRefresh() {
mAdapter.clear();
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
refreshLayout.setRefreshing(false);
}
}, 2500);
}
}
activity_main.xml中
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/refreshContainer"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/mainView"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
item_cardview.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
app:cardElevation="8dp"
card_view:cardCornerRadius="2dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout <!-- This is the specific part you asked to color -->
android:id="@+id/heading_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/teal_500"
android:padding="36dp"
android:orientation="vertical">
<TextView
android:id="@+id/tv_heading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="22 mins to Ancona"
android:textColor="@color/white"
android:textStyle="bold"
android:textSize="36sp" />
<TextView
android:id="@+id/tv_subheading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:layout_below="@+id/tv_heading"
android:text="Light traffic on ss16"
android:textColor="@color/teal_200"
android:textSize="24sp" />
</LinearLayout>
<ImageView
android:id="@+id/iv_map"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:contentDescription="Assigned delivery boy"
android:scaleType="fitXY"
android:src="@drawable/bg_map" />
<TextView
android:id="@+id/tv_footer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:layout_below="@+id/tv_heading"
android:text="It is just an example!"
android:textColor="@color/grey_500"
android:textStyle="bold"
android:textSize="24sp" />
</LinearLayout>
</android.support.v7.widget.CardView>
答案 0 :(得分:0)
所以你想在卡片中添加不在活动工具栏中的图标,对吗? 然后添加一个在卡片顶部对齐的relativelayout。您可以将图标添加到此布局中,然后将它们对齐。 您的卡的主要内容应该在relativelayout下方对齐。沃伊拉:)