안드로이드 텍스트(.txt)파일 읽기

텍스트(.txt)파일 읽기

java)

package com.ghj.blog_042;
 
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
 
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
 
public class MainActivity extends AppCompatActivity {
 
    TextView txtRead;
    final static String filePath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/TestLog/logfile.txt";
 
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        txtRead = (TextView)findViewById(R.id.txtRead);
    }
 
    public void mOnFileRead(View v){
        String read = ReadTextFile(filePath);
        txtRead.setText(read);
    }
 
 
    //경로의 텍스트 파일읽기
    public String ReadTextFile(String path){
        StringBuffer strBuffer = new StringBuffer();
        try{
            InputStream is = new FileInputStream(path);
            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            String line="";
            while((line=reader.readLine())!=null){
                strBuffer.append(line+"\n");
            }
 
            reader.close();
            is.close();
        }catch (IOException e){
            e.printStackTrace();
            return "";
        }
        return strBuffer.toString();
    }
}
 

xml)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
 
    <Button
        android:text="파일읽기"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="mOnFileRead"/>
 
    <TextView
        android:id="@+id/txtRead"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
 
</LinearLayout>
 

AndroidManifest.xml)

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 

결과