Question

我有一个arraylist，它从CSV文件获取输入，并由listview显示。我尝试做的是为该活动添加搜索功能。我已经看过其他一些教程，但我似乎无法让代码工作。

这是CSV arraylist的主要java类：

public class games extends Activity{



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

        InputStream inputStream = getResources().openRawResource(R.raw."filename");
        CSVFile csvFile = new CSVFile(inputStream);
        List<String[]> slots = csvFile.read();
        MyListAdapter adapter = new MyListAdapter(this, R.layout.list_item, R.id.text_view, filename);
        ListView listView = (ListView) findViewById(R.id.list);
        listView.setAdapter(adapter);

    }

    private class CSVFile {
        InputStream inputStream;

        public CSVFile(InputStream inputStream){
            this.inputStream = inputStream;
        }

        public List<String[]> read(){
            //
            List<String[]> ArrayList = new ArrayList<String[]>();
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
            try {
                String line;
                while ((line = reader.readLine()) != null) {
                    String[] row = line.split(",");
                    ArrayList.add(row);
                }
            }
            catch (IOException e) {
                Log.e("Main",e.getMessage());
            }
            finally {
                try {
                    inputStream.close();
                }
                catch (IOException e) {
                    Log.e("Main",e.getMessage());
                }
            }
            return ArrayList;
        }
    }


}

我从另一个stackoverflow帖子中找到了代码，但我不知道如何真正将其应用于我的特定情况或者是否适用：

 ArrayList<String> storedContent = new ArrayList<String>();
    ArrayList<String> contentArray = new ArrayList<String>();
    String searchText = "sometest";
    for(String each : storedContent){
        if (each.contains(searchText)){
            contentArray.add(each);
        }
    }

    ListView displaySearchResult = (ListView)findViewById(R.id.list_id);
    myListAdapter adapter = new myListAdapter(contentArray, this) ;
    displaySearchResult.setAdapter(myListAdapter);

任何解决方案都将不胜感激，如果我遗漏了您可能需要帮助我的任何解决方案，请告诉我，我对Java场景非常新鲜。

Answer 1

以下是您的代码......我认为这是不对的。你需要实例化arraylist

public List<String[]> read(){


List<String[]> ArrayList = new ArrayList<String[]>();

}

相反，试试这个......

public ArrayList<String> read(){

ArrayList<String> objName = new ArrayList<String>();

//create an String type arraylist "objName". you store all the string data from csv file into this "objName"

return objName;

}

我希望它有所帮助...

我需要帮助为我的CSV文件添加搜索功能

1 个答案: