首页
学习
活动
专区
工具
TVP
发布
社区首页 >问答首页 >带有图像的网格视图上的android搜索视图不能提供正确的搜索结果。

带有图像的网格视图上的android搜索视图不能提供正确的搜索结果。
EN

Stack Overflow用户
提问于 2018-06-14 05:39:57
回答 2查看 37关注 0票数 1

我正在尝试为android的网格视图实现一个搜索功能。但是,每次我搜索一张图片时,我都得不到包含文本的正确图片。下面是我的代码。非常感谢您的帮助:)根据我打印的日志语句,我的过滤器逻辑似乎是正确的。但是,图像和文本没有正确过滤。

MainActivity。

代码语言:javascript
复制
public class MainActivity extends AppCompatActivity {

final String TAG = "MainActivity";

GridView searchGrid;
ImageAdapter adapter;
int[] resourceIds = new int[]{R.drawable.sample_0, R.drawable.sample_1, R.drawable.sample_2,
        R.drawable.sample_3, R.drawable.sample_4, R.drawable.sample_5};
String[] names = new String[]{"sample 0", "sample 1", "sample 2", "sample 3", "sample 4",
        "testImage"};


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    searchGrid = findViewById(R.id.searchGrid);





    adapter = new ImageAdapter(this, this.getModels());

    searchGrid.setAdapter(adapter);

}


public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.search_menu, menu);
    MenuItem item = menu.findItem(R.id.search_food);
    SearchView searchView = (SearchView) item.getActionView();

    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String s) {
            return false;
        }

        @Override
        public boolean onQueryTextChange(String s) {
            adapter.filter(s);
            return false;
        }
    });
    return super.onCreateOptionsMenu(menu);
}

private List<DataModel> getModels() {
    List<DataModel> models = new ArrayList<>();
    DataModel dm;

    for (int i = 0; i < names.length; i++) {
        dm = new DataModel(resourceIds[i], names[i]);
        models.add(dm);
    }
    return models;
}

class ImageAdapter extends BaseAdapter {

    private Context mContext;
    private List<DataModel> dataModels;
    private List<DataModel> filterList = new ArrayList<>();


    public ImageAdapter(Context context, List<DataModel> dataModels) {
        mContext = context;
        this.dataModels = dataModels;
        this.filterList.addAll(dataModels);
    }

    @Override
    public int getCount() {
        return dataModels.size();
    }

    @Override
    public Object getItem(int i) {
        return dataModels.get(i);
    }

    @Override
    public long getItemId(int i) {
        return dataModels.indexOf(getItem(i));
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        ImageView imageView;
        if (view == null) {
            // if it's not recycled, initialize some attributes
            view = layoutInflater.inflate(R.layout.single_item, null);
            imageView = view.findViewById(R.id.imageView);
            TextView textView = view.findViewById(R.id.textView);
            imageView.setImageResource(dataModels.get(i).resourceId);
            textView.setText(dataModels.get(i).imageName);
        }
        return view;
    }


    public void filter(CharSequence text) {
        String query = text.toString().toLowerCase();
        //Log.i(TAG,query);
        dataModels.clear();
        if (text.length() == 0 ) {
            dataModels.addAll(filterList);
        } else {
            for (DataModel dm : filterList) {
                if (dm.imageName.toLowerCase().contains(query)) {
                    Log.i(TAG,dm.imageName + " " + query);
                    dataModels.add(dm);
                }
            }
        }
        notifyDataSetChanged();
    }
}

MainActivity xml文件。

代码语言:javascript
复制
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<GridView
   android:padding="20dp"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/searchGrid"
   android:numColumns="auto_fit"
   android:columnWidth="120dp"
   android:gravity="center">

</GridView>

</RelativeLayout>

single_item xml:

代码语言:javascript
复制
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">


<ImageView
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:id="@+id/imageView" />

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/textView"
    android:layout_below="@+id/imageView"
    android:layout_alignStart="@+id/imageView"
    android:layout_alignEnd="@+id/imageView"
    />

search_manu xml:

代码语言:javascript
复制
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item android:id="@+id/search_food"
    android:title="Search Myfoods"
    android:icon="@android:drawable/ic_menu_search"
    app:actionViewClass="android.widget.SearchView"
    app:showAsAction="always">
</item>

EN

回答 2

Stack Overflow用户

回答已采纳

发布于 2018-06-14 07:48:46

您的筛选器代码是正确的,但您没有正确显示项目。即使您的视图已经初始化,您也需要在视图中填充正确的数据,否则视图将显示以前的条目数据。像这样修改你的代码

代码语言:javascript
复制
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
    LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    if (view == null) {
        view = layoutInflater.inflate(R.layout.single_item, null);
    }

    ImageView imageView = view.findViewById(R.id.imageView);
    TextView textView = view.findViewById(R.id.textView);
    imageView.setImageResource(dataModels.get(i).resourceId);
    textView.setText(dataModels.get(i).imageName);
    return view;
}

也可以尝试使用holder模式,这样就不必每次都通过id来查找视图。它将节省一些UI线程的运行时间

票数 0
EN

Stack Overflow用户

发布于 2018-06-14 06:20:04

尝试像这样修改你的代码。也许这会有帮助。

代码语言:javascript
复制
    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        ImageView imageView;
        if (view == null) {
            // if it's not recycled, initialize some attributes
            view = layoutInflater.inflate(R.layout.single_item, null);
        }
        imageView = view.findViewById(R.id.imageView);
        TextView textView = view.findViewById(R.id.textView);
        imageView.setImageResource(dataModels.get(i).resourceId);
        textView.setText(dataModels.get(i).imageName);
        return view;
    }
票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://stackoverflow.com/questions/50846669

复制
相关文章

相似问题

领券
问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档