Question

我的Android应用程序包含一个带有图像的gridview和它下面的文本。我将一系列字符串传递给textview。我希望edittext字段充当搜索栏并过滤结果。我已经看到了与此相关的其他问题，但它们似乎过滤了传递给Listview的arraylist。如何在gridview中过滤字符串数组？

我知道我应该添加一个TextWatcher来监听EditText上的文本更改，但之后如何过滤我的数据？

这是我的代码

Mainactivity.java

public class MainActivity extends Activity {
EditText inputSearch;
GridView grid;

public static String[] Sname = {
        "one",
        "two",
        "three",
        "four",

};


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

    final CustomGrid adapter = new CustomGrid(MainActivity.this, Sname);
    grid = (GridView) findViewById(R.id.grid);
    grid.setAdapter(adapter);
    grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                                int position, long id) {
            Toast.makeText(MainActivity.this, "You Clicked at " + Sname[+position], Toast.LENGTH_SHORT).show();

        }
    });

    inputSearch = (EditText) findViewById(R.id.editText);


    }
}

CustomGrid.java

public class CustomGrid extends BaseAdapter {
private Context mContext;
private final String[] Sname;


public CustomGrid(Context c,String[] Sname) {
    mContext = c;

    this.Sname = Sname;
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    return Sname.length;
}

@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return 0;
}



@Override
public View getView(int position, View view, ViewGroup parent) {
    // TODO Auto-generated method stub
    View grid;
    LayoutInflater inflater = (LayoutInflater) mContext
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);


        grid = new View(mContext);
        grid = inflater.inflate(R.layout.grid_single, null);
        TextView textView = (TextView) grid.findViewById(R.id.grid_text);
        ImageView imageView = (ImageView)grid.findViewById(R.id.grid_image);
        textView.setText(Sname[position]);
        imageView.setImageResource(R.mipmap.image1);

    return grid; }}

Answer 1

您可以添加适配器，即CustomGrid filter(String)方法。您还可以在适配器中添加字段String [] toDisplay。

在您的构造函数中添加toDisplay = Sname，并在所有其他方法中将Sname替换为toDisplay

在filter方法中创建一个新的字符串数组，其中只包含Sname中与所需字符串匹配的字符串。将此新数组设置为toDisplay。

然后在notifyDataSetChanged

上调用CustomGrid方法

过滤方法示例：

public void filter(String toMatch) {
     List<String> matches = new ArrayList<String>();
     for (String string : Sname) {
         if (string.matches(toMatch)) {//on whatever mathcing you feel to use
               matches.add(string);
          }
      }
      toDisplay = new String[matches.size()];
      toDisplay = matches.toArray(toDisplay);

     notifyDataSetChanged(); //update your grid view
}

如何在android中的gridview中添加搜索功能？

1 个答案: