package com.secangkirkopipanas.android.apps;
import java.io.BufferedReader; import java.io.FileOutputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter;
import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast;
public class SavingFileActivity extends Activity {
private Button btnSubmit = null; private Button btnQuit = null; private EditText txtName = null;
private String fileName = "SampleSavingFile.txt";
/** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
// setting the view to our newly created layout setContentView(R.layout.main);
txtName = (EditText) findViewById(R.id.txtName);
// initializing button, including layout parameters btnSubmit = (Button) findViewById(R.id.btnSave); btnSubmit.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { doConfirm(); }
});
btnQuit = (Button) findViewById(R.id.btnQuit); btnQuit.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { finish(); }
}); }
public void doConfirm() { AlertDialog alertDialog = new AlertDialog.Builder(this).create(); alertDialog.setTitle("Sending Request"); alertDialog .setMessage("This process will take few seconds. Are you sure want to save to file?"); final String name = txtName.getText().toString(); alertDialog.setButton("OK", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Log.i("onClick@doConfirm", "Click on 'save' button with txtName: " + name);
if (saveFile(name, fileName)) { Toast.makeText( SavingFileActivity.this, "The file has been saved with name '" + fileName + "'", Toast.LENGTH_LONG).show();
String fileContent = readFile(fileName); Toast.makeText(SavingFileActivity.this, fileContent, Toast.LENGTH_LONG).show(); } } }); alertDialog.setIcon(R.drawable.icon); alertDialog.show(); }
public boolean saveFile(String content, String path) {
try { // catches IOException below final String bodyOfFile = new String(content);
// ##### Write a file to the disk ##### /* * We have to use the openFileOutput()-method the ActivityContext * provides, to protect your file from others and This is done for * security-reasons. We chose MODE_WORLD_READABLE, because we have * nothing to hide in our file */ FileOutputStream fOut = openFileOutput(path, MODE_WORLD_READABLE); OutputStreamWriter osw = new OutputStreamWriter(fOut);
// Write the string to the file osw.write(bodyOfFile); /* * ensure that everything is really written out and close */ osw.flush(); osw.close();
return true;
} catch (Exception e) {
e.printStackTrace(); Toast.makeText(SavingFileActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
return false; } }
public String readFile(String path) {
try { // catches IOException below
StringBuffer strBuff = new StringBuffer();
// ##### Read a file from the disk ##### /* * We have to use the openFileInput()-method the ActivityContext * provides, to open the file from disk. */ InputStream is = openFileInput(path);
if (is != null) { // prepare the file for reading InputStreamReader isr = new InputStreamReader(is); BufferedReader buff = new BufferedReader(isr);
String line;
// read every line of the file into the line-variable, on line // at the time while ((line = buff.readLine()) != null) { // do something with the settings from the file strBuff.append(line.trim()); } }
is.close();
return strBuff.toString().trim();
} catch (Exception e) {
e.printStackTrace(); Toast.makeText(SavingFileActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
return null; } | 
