在android应用程序中逐行读取文本文件

Question

我正在尝试使用 android studio 制作一个 android 应用程序。我的应用程序需要逐行读取文本文件，并对每一行的字符串执行一项任务。我为此使用了 bufferedread，但我不断收到 File not found 错误。我在 /app/src/main/assets/ 中创建了一个资产文件夹，并将文本文件复制到此资产文件夹中。任何帮助将不胜感激！请在下面找到我的代码：-

package com.example.spandanmadan1.hinglish;

import android.content.res.AssetManager;
import android.provider.UserDictionary;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.InputStream;
import java.io.InputStreamReader;


public class MyActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);
        Button bsubmit = (Button) findViewById(R.id.Hinglishbutton);

        bsubmit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AssetManager assManager = getApplicationContext().getAssets();
                InputStream fis = assManager.open("HindiSlang.txt");
                BufferedReader bfr = new BufferedReader(new InputStreamReader(fis));

                String line=null;
                while ((line = bfr.readLine()) != null) {
                    UserDictionary.Words.addWord(getApplicationContext(),line,1,"",null);
                }
            }
        });
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }



}

Answer 1

尝试以下方法之一：

try {
    fIn = getApplicationContext().getResources().getAssets()
            .open("HindiSlang.txt", Context.MODE_WORLD_READABLE);

    input = new BufferedReader(new InputStreamReader(fIn));
    String line = "";
    while ((line = input.readLine()) != null) {
        // process the line..
    }
} catch (Exception e) {
    e.getMessage();
}

或者写一个函数：

public String LoadData(String inFile) {
    String tContents = "";

  try {
     InputStream stream = getAssets().open(inFile); // you will get the method getAssets anywhere from current activity.

     int size = stream.available();
     byte[] buffer = new byte[size];
     stream.read(buffer);
     stream.close();
     tContents = new String(buffer);
     } catch (IOException e) {
      // Handle exceptions here
   }

   return tContents;

}

Answer 2

这是一个逐行读取 InputStream（或文件）的 Kotlin 示例：

InputStream.bufferedReader().useLines { lines ->
  lines.forEach { line ->
    System.out.println(line)
  }
}