Aplikasi File1

Pada aplikasi ini kita akan membuat sebuah file dan memasukkan isinya serta kita melakukan read dan write terhadap file tersebut. Buatlah project baru seperti berikut:

Project Name                  : Array2

            Build Target                     : Android 4.2.2

            Aplication name               : array2

Package name                : com.immobulus.array2

Activity                             : array2

Min SDK                          : 9

main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"       android:layout_width="fill_parent"       android:layout_height="fill_parent"       android:orientation="vertical">       <Button android:id="@+id/close"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="Close" /> <EditText             android:id="@+id/editor"             android:layout_width="fill_parent"             android:layout_height="fill_parent"             android:singleLine="false"             android:gravity="top"             /> </LinearLayout> file1.java package com.immobulus.file1; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; public class file1 extends Activity {       private final static String fileku="fileku.txt";       private EditText editor;             @Override       public void onCreate(Bundle icicle) {             super.onCreate(icicle);             setContentView(R.layout.main);             editor=(EditText)findViewById(R.id.editor);                         Button btn=(Button)findViewById(R.id.close);                         btn.setOnClickListener(new Button.OnClickListener() {                   public void onClick(View v) {                         finish();                   }             });       }             public void onResume() {             super.onResume();                         try {                   InputStream in=openFileInput(fileku);                                     if (in!=null) {                         InputStreamReader tmp=new InputStreamReader(in);                         BufferedReader reader=new BufferedReader(tmp);                         String str;                         StringBuilder buf=new StringBuilder();                                                 while ((str = reader.readLine()) != null) {                               buf.append(str+"\n");                         }                                                 in.close();                         editor.setText(buf.toString());                   }             }             catch (java.io.FileNotFoundException e) {             }             catch (Throwable t) {                   Toast                         .makeText(this, "Exception: "+t.toString(), 2000)                         .show();             }       }             public void onPause() {             super.onPause();                         try {                   OutputStreamWriter out=                               new OutputStreamWriter(openFileOutput(fileku, 0));                                     out.write(editor.getText().toString());                   out.close();                        }             catch (Throwable t) {                   Toast                         .makeText(this, "Exception: "+t.toString(), 2000)                         .show();             }       } }       private final static String fileku="fileku.txt";       private EditText editor;                         while ((str = reader.readLine()) != null) {                               buf.append(str+"\n");                         }                                                 in.close();                         editor.setText(buf.toString());                   }             }             catch (java.io.FileNotFoundException e) {             }             catch (Throwable t) {                   Toast                         .makeText(this, "Exception: "+t.toString(), 2000)                         .show();             }       }             public void onPause() {             super.onPause();                         try {                   OutputStreamWriter out=                               new OutputStreamWriter(openFileOutput(fileku, 0));                                     out.write(editor.getText().toString());                   out.close();                        }             catch (Throwable t) {                   Toast                         .makeText(this, "Exception: "+t.toString(), 2000)                         .show();             }       } } Nama file yang akan kita buat adalah fileku.txt yang didefinisikan dengan coding        private final static String fileku="fileku.txt";       private EditText editor; Jalankan apikasi file1 dan sisi tulisan seperti gambar berikut: Sumber: PEMROGRAMAN APLIKASI MOBILE SMARTPHONE DAN TABLET PC  BERBASIS ANDROID. oleh : Nazruddin Safaat H