java - 如何读取 Android Assets 中的文件

Question

我的 Android 遇到问题。我想打开文件，检查它并只返回一个简单的值。

public void setMessageCode(String code){
        try {
            messageCode = setMsg(code);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public String setMsg(String messageCode) throws IOException{
        String FILE = "src/dialogs.txt", msg;
        BufferedReader in = new BufferedReader(new FileReader(FILE)); //IO Exception here
        msg = in.readLine();
        while(msg!=null){
            message = msg.split(",");
            for(int i=0; i<message.length; i++)
                if(message[i].equals(messageCode)){
                    in.close();
                    return message[i++];
                }
            msg = in.readLine();
        }
        in.close();
        return "Nothing to get";
    }

所以 Eclipse 没有发现问题并且工作完美。 ADT 失败。 Dialogs.txt 位于 src/... 中，我检查了这一百万次。该怎么办？

Answer 1

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        try {
            String first_line = read_file("dialogs.txt");
            System.out.print(first_line);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }


    public String read_file(String filename) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                getAssets().open(filename)));

        int i=0;
        String line = reader.readLine();
        while (line != null) {
            if(++i==1)
                return line;//only read the first line
            line = reader.readLine();
        }

        reader.close();
        return "Nothing to get";
    }

}