Android קריאת וכתיבת קבצים אנדרואיד

Android קריאת וכתיבת קבצים אנדרואיד

bundle il.co.newclass.information;

import android.content material.Context;
import android.os.Bundle;
import android.assist.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class MainActivity extends AppCompatActivity {

String fileName = “aaa.txt”;
@Override
protected void onCreate(Bundle savedInstanceState) {
tremendous.onCreate(savedInstanceState);
setContentView(R.structure.activity_main);
ultimate Context con = this;

((Button) findViewById(R.id.btnread)).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

File file = new File(con.getFilesDir(), fileName);

attempt {
if (!file.exists()) {
Toast.makeText(con,”File will not be exists”,Toast.LENGTH_LONG).present();
}
else
{
FileInputStream is = new FileInputStream(file);

InputStreamReader isr = new InputStreamReader(is);

BufferedReader br = new BufferedReader(isr);

String str = br.readLine();
whereas(str!=null)
{

str = br.readLine();
}

br.shut();
isr.shut();
is.shut();

}

}
catch (IOException e)
{
//
}

}
});

((Button) findViewById(R.id.btnwrite)).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

File file = new File(con.getFilesDir(), fileName);

attempt {
if (!file.exists()) {
file.createNewFile();
}

FileOutputStream os = new FileOutputStream(file);
byte[] arr = new byte[100];
String str = “abcd!!!!”;

OutputStreamWriter osw = new OutputStreamWriter(os);

osw.write(str);
osw.append(“1111111”);
osw.append(“2222222”);

osw.append(“n”);
osw.append(“1111111”);
osw.append(“2222222”);
osw.append(“n”);
osw.append(“1111111”);
osw.append(“2222222”);
osw.append(“n”);
osw.append(“1111111”);
osw.append(“2222222”);
osw.append(“n”);
osw.append(“1111111”);
osw.append(“2222222”);

osw.shut();
os.shut();

}
catch (IOException e)
{
//
}

}
});
}
}

חיים גלבוע, הדרכה, יעוץ ופתוח תוכנה
haim@newclass.co.il
Haim Gilboa

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