android - 如何在android中使grid-view水平滚动

Question

我已经为 gridview 编写了代码，我可以在其中显示图像和文本，但我想在单个可滚动行中显示所有图像，例如 Pulse 新闻应用程序。我已经在 xml 中为 gridview 实现了水平 ScrollView ，但它根本不起作用。我正在为标签使用 pageviwer，并且正在使用 fragment 。

这是我的 xml 代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
   <HorizontalScrollView 
   android:id="@+id/horizontalScrollView1" 
   android:layout_width="fill_parent" 
   android:layout_height="wrap_content"
   android:fillViewport="true"
   android:scrollbars="horizontal" >
<GridView
    android:layout_width="500dp"
    android:layout_height="400dp"
    android:id="@+id/gridview"
    android:columnWidth="300dp"
    android:numColumns="3"
    android:horizontalSpacing="10dp"
    android:scrollbars="horizontal">
</GridView>
 </HorizontalScrollView>
</RelativeLayout>

这是我的图片适配代码

public class ImageAdapter extends BaseAdapter {
private Context context;
private final String[] mobileValues;
private TextView t;
public ImageAdapter(Context context, String[] mobileValues) {
    this.context = context;
    this.mobileValues = mobileValues;
}
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View gridView;
    if (convertView == null) {
        gridView = new View(context);
        // get layout from mobile.xml
        gridView = inflater.inflate(R.layout.showlist_item, null);
       // set value into textview
        TextView textView = (TextView) gridView
                .findViewById(R.id.grid_item_label);
        textView.setText(mobileValues[position]);
        // set image based on selected text
        ImageView imageView = (ImageView) gridView
                .findViewById(R.id.grid_item_image);
        String mobile = mobileValues[position];
        if (mobile.equals("Windows")) {
            imageView.setImageResource(R.drawable.test_play_image);
        } else if (mobile.equals("iOS")) {
            imageView.setImageResource(R.drawable.test_play_image);
        } else if (mobile.equals("Blackberry")) {
            imageView.setImageResource(R.drawable.test_play_image);
        } else {
            imageView.setImageResource(R.drawable.test_play_image);
        }
    } else {
        gridView = (View) convertView;
    }
    return gridView;
}
private void clickedButton(TextView tv){
    int num = Integer.parseInt(tv.getText().toString());
    ++num;
    tv.setText(Integer.toString(num));
}
private void clickedButtonm(TextView tv){
    int num = Integer.parseInt(tv.getText().toString());
    if(num>0){
        --num;
        tv.setText(Integer.toString(num));
    }
}
public int getCount() {
    return mobileValues.length;
}
public Object getItem(int position) {
    return null;
}
public long getItemId(int position) {
    return 0;
}
class MyOnClickListener implements OnClickListener{
    public final TextView tv;
    public MyOnClickListener(TextView tv){
        this.tv=tv;
    }
    public void onClick(View v) {
        // TODO Auto-generated method stub
        clickedButton(tv);
    }
}
class MyOnClickListenerm implements OnClickListener{
    public final TextView tv;
    public MyOnClickListenerm(TextView tv){
        this.tv=tv;
    }
    public void onClick(View v) {
        // TODO Auto-generated method stub
        clickedButtonm(tv);
    }
}

我想像这样向右滚动显示。

Answer 1

从现在开始，Android 中有一个不错的解决方案(正如 Zainodis 在 its comment 中所说):HorizontalGridView .

1. Gradle 依赖

dependencies {
    compile 'com.android.support:leanback-v17:23.1.0'
}

---

2. 将其添加到您的布局中

your_activity.xml

<!-- your stuff before... -->
        <android.support.v17.leanback.widget.HorizontalGridView
            android:layout_width="wrap_content"
            android:layout_height="80dp"
            android:id="@+id/gridView"
            />
<!-- your stuff after... -->

---

3. 布局网格元素

为您的网格元素 ( grid_element.xml ) 创建一个布局。我创建了一个简单的按钮，其中只有一个按钮。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button" />
</LinearLayout>

---

4. 创建适配器

深受此链接启发:https://gist.github.com/gabrielemariotti/4c189fb1124df4556058

public class GridElementAdapter extends RecyclerView.Adapter<GridElementAdapter.SimpleViewHolder>{

    private Context context;
    private List<String> elements;

    public GridElementAdapter(Context context){
        this.context = context;
        this.elements = new ArrayList<String>();
        // Fill dummy list
        for(int i = 0; i < 40 ; i++){
            this.elements.add(i, "Position : " + i);
        }
    }

    public static class SimpleViewHolder extends RecyclerView.ViewHolder {
        public final Button button;

        public SimpleViewHolder(View view) {
            super(view);
            button = (Button) view.findViewById(R.id.button);
        }
    }

    @Override
    public SimpleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        final View view = LayoutInflater.from(this.context).inflate(R.layout.grid_element, parent, false);
        return new SimpleViewHolder(view);
    }

    @Override
    public void onBindViewHolder(SimpleViewHolder holder, final int position) {
        holder.button.setText(elements.get(position));
        holder.button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(context, "Position =" + position, Toast.LENGTH_SHORT).show();
            }
        });
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public int getItemCount() {
        return this.elements.size();
    }
}

---

5. 在你的 Activity 中初始化它:

private HorizontalGridView horizontalGridView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.your_activity);
    horizontalGridView = (HorizontalGridView) findViewById(R.id.gridView);
    GridElementAdapter adapter = new GridElementAdapter(this);

    horizontalGridView.setAdapter(adapter);
}