带有图像、文本和添加项目按钮的自定义 ListView [英] Custom ListView with image, text and add item button
问题描述
我对 Android 很陌生，无法实现这一点，整天都在搜索.
I am quite new to Android and can't achieve this, been searching all day.
我创建了自定义 xml 布局，我找到了在创建时添加项目的方法，但我需要列表为空，而不是按下按钮从列表中添加.
I have created the custom xml layout, I have found ways to add items on create, but I need the list to be empty and than when the button is pressed to add from a list.
这是布局:
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TableRow>
<ImageView
android:id="@+id/info_img_view"
android:layout_width="30dp"
android:layout_height="30dp" />
<TextView
android:id="@+id/info_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
<TextView
android:id="@+id/info_time_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="right"
/>
</TableRow>
我在主要活动中有一个 ListView:
I have a ListView in the main activity:
<ListView
android:id="@+id/list_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
我该怎么做?如果有人能给我指出一个资源，我可以在其中了解代码实际在做什么，而不是我找到的教程，我只是复制和粘贴...
How do I go about this? I would appreciate it if someone can point me to a resource where I can learn what the code is actually doing, not the tutorials I find where I just copy and paste...
谢谢！
编辑，稍微解释一下我想要达到的目标
我有 6 个按钮.当一个按钮被按下时，它应该添加一个包含两个文本视图的列表项，以及总共三个图像中的一个图像.
I have 6 buttons. When a button is pressed it should add a list item with two textviews, and one image out of total three images.
例如，如果 Button1 被按下:添加列表项 > "Text one" "Text one" "imageTwoOfThree".
So for instance if Button1 is pressed: Add list item > "Text one" "Text one" "imageTwoOfThree".
如果Button2被按下:在顶部添加列表项>文本二"文本二"imageTwoOfThree"
Than, if Button2 is pressed: Add list item on top > "Text two" "Text two" "imageTwoOfThree"
等等......文本是硬编码的.
And so on... The text is hardcoded.
推荐答案
这里使用这个:我创建了一个包含 dummydata 的列表，您可以根据自己的需要更改文本和图像
Here use this: I have created a list with dummydata you can change the text and Image according to you
首先创建一个类Data:
First create a class Data:
public class Data {
private String name,price;
private int imageId;
public Data(){}
public Data(String name,String price,int imageId){
this.name = name;
this.price = price;
this.imageId = imageId;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getImageId() {
return imageId;
}
public void setImageId(int imageId) {
this.imageId = imageId;
}
}
然后创建一个 ListView Adapter 来处理您的数据:
Then create a ListView Adapter to handle your data:
public class ListViewAdaptor extends RecyclerView.Adapter<ListViewAdaptor.MyViewHolder> {
private List<Data> mDataList;
public class MyViewHolder extends RecyclerView.ViewHolder{
public TextView name,price;
public ImageView imageView;
public MyViewHolder(View view){
super(view);
name = (TextView) view.findViewById(R.id.name);
price= (TextView) view.findViewById(R.id.price);
imageView = (ImageView) view.findViewById(R.id.image);
}
}
public ListViewAdaptor(List<Data> dataList){
this.mDataList = dataList;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_view_item, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Data data = mDataList.get(position);
holder.name.setText(data.getName());
holder.price.setText(data.getPrice());
holder.imageView.setImageResource(data.getImageId());
}
@Override
public int getItemCount() {
return mDataList.size();
}
}
您的列表视图项的布局将其命名为 list_view_item:
layout for your list view items name it list_view_item:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@mipmap/ic_launcher"
android:id="@+id/image"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/name"
android:text="name"
android:gravity="center"
android:textSize="26sp"
android:layout_weight="1"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/price"
android:text="price"
android:gravity="center"
android:textSize="26sp"
android:layout_weight="1"/>
</LinearLayout>
然后从您要添加 listView 的活动中在布局中添加 recyclerView:
Then from your activity where you want to add listView add recyclerView in layout:
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/recycler_view">
</android.support.v7.widget.RecyclerView>
然后像这样使用这个recyclerview://我已经从我的 MainActivity 调用它，你可以在任何你喜欢的活动中使用它
Then use this recyclerview like this: //I have called it from my MainActivity you can use it in whatever activity you'll like
public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private ListViewAdaptor mAdapter;
private List<Data> mDataList = new ArrayList<>();
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mAdapter = new ListViewAdaptor(mDataList);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setAdapter(mAdapter);
prepareList();
}
public void prepareList(){
Data data = new Data("Item1","Price1",R.drawable.star);
mDataList.add(data);
data = new Data("Item2","Price2",R.drawable.star);
mDataList.add(data);
data = new Data("Item3","Price3",R.drawable.star);
mDataList.add(data);
data = new Data("Item4","Price4",R.drawable.star);
mDataList.add(data);
data = new Data("Item5","Price5",R.drawable.star);
mDataList.add(data);
}
}
希望这有帮助！！！
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