没有文本 R.string 链接可能?字符串 [] 名称 = ;
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【中文标题】没有文本 R.string 链接可能?字符串 [] 名称 = ;【英文标题】:No text R.string linking possible? String[] names = ;没有文本 R.string 链接可能?字符串 [] 名称 = ; 【发布时间】:2020-10-20 22:22:35 【问题描述】:您好,我想使用本教程创建一个包含搜索、图像和文本的 Litsview 页面,到目前为止效果很好。
Listview Tutorial
但是我不能使用 strings.xml 中的文本吗?
String[] names = R.string.perkablenkungname,; // error
String[] names = getResources().getString(R.string.perkablenkungname),; ///no error App crash
String[] names = getString(R.string.perkablenkungname),; /// no error App crash
对不起我的英语不好!
【问题讨论】:
【参考方案1】:试试这个方法
像这样在string.xml
中创建一个数组
<array name="namesArray">
<item>Item One</item>
<item>Item Two</item>
<item>Item Three</item>
</array>
现在像这样访问你的数组
String[] names = getResources().getStringArray(R.array.namesArray);
【讨论】:
应用程序也不以此开头。它崩溃而没有错误消息 @whazza83 你能分享你的代码吗?【参考方案2】:package com.whazza.searchtest;
import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity
String[] perks = getResources().getStringArray(R.array.namesArray);
String[] name = "This is apple","This is banana","This is kiwi";
String[] lehrbar = "This is","This is","This is";
int[] images = R.drawable.apple,R.drawable.banana,R.drawable.kiwi;
List<ItemsModel> itemsModelList = new ArrayList<>();
ListView listView;
CustomAdapter customAdapter;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = findViewById(R.id.listview);
for(int i = 0;i < perks.length;i++)
ItemsModel itemsModel = new ItemsModel(perks[i],name[i],lehrbar[i],images[i]);
itemsModelList.add(itemsModel);
customAdapter = new CustomAdapter(itemsModelList,this);
listView.setAdapter(customAdapter);
@Override
public boolean onCreateOptionsMenu(Menu menu)
getMenuInflater().inflate(R.menu.search_menu,menu);
MenuItem menuItem = menu.findItem(R.id.searchView);
SearchView searchView = (SearchView) menuItem.getActionView();
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener()
@Override
public boolean onQueryTextSubmit(String query)
return false;
@Override
public boolean onQueryTextChange(String newText)
Log.e("Main"," data search"+newText);
customAdapter.getFilter().filter(newText);
return true;
);
return true;
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item)
int id = item.getItemId();
if(id == R.id.searchView)
return true;
return super.onOptionsItemSelected(item);
public class CustomAdapter extends BaseAdapter implements Filterable
private List<ItemsModel> itemsModelsl;
private List<ItemsModel> itemsModelListFiltered;
private Context context;
public CustomAdapter(List<ItemsModel> itemsModelsl, Context context)
this.itemsModelsl = itemsModelsl;
this.itemsModelListFiltered = itemsModelsl;
this.context = context;
@Override
public int getCount()
return itemsModelListFiltered.size();
@Override
public Object getItem(int position)
return itemsModelListFiltered.get(position);
@Override
public long getItemId(int position)
return position;
@Override
public View getView(final int position, View convertView, ViewGroup parent)
View view = getLayoutInflater().inflate(R.layout.row_items,null);
TextView perks = view.findViewById(R.id.perks);
TextView name = view.findViewById(R.id.name);
TextView lehrbar = view.findViewById(R.id.lehrbar);
ImageView imageView = view.findViewById(R.id.images);
perks.setText(itemsModelListFiltered.get(position).getPerks());
name.setText(itemsModelListFiltered.get(position).getName());
lehrbar.setText(itemsModelListFiltered.get(position).getLehrbar());
imageView.setImageResource(itemsModelListFiltered.get(position).getImages());
view.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
Log.e("main activity","item clicked");
startActivity(new Intent(MainActivity.this,ItemsPreviewActivity.class).putExtra("items",itemsModelListFiltered.get(position)));
);
return view;
@Override
public Filter getFilter()
Filter filter = new Filter()
@Override
protected FilterResults performFiltering(CharSequence constraint)
FilterResults filterResults = new FilterResults();
if(constraint == null || constraint.length() == 0)
filterResults.count = itemsModelsl.size();
filterResults.values = itemsModelsl;
else
List<ItemsModel> resultsModel = new ArrayList<>();
String searchStr = constraint.toString().toLowerCase();
for(ItemsModel itemsModel:itemsModelsl)
if(itemsModel.getPerks().contains(searchStr) || itemsModel.getName().contains(searchStr))
resultsModel.add(itemsModel);
filterResults.count = resultsModel.size();
filterResults.values = resultsModel;
return filterResults;
@Override
protected void publishResults(CharSequence constraint, FilterResults results)
itemsModelListFiltered = (List<ItemsModel>) results.values;
notifyDataSetChanged();
;
return filter;
【讨论】:
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