furthermore here is a sketch I posted a few days back which allows you to do exactly this.
you should be able to use the first sketch posted.
just set the following line in setup
my full updated code in case that last link is problematic.
Summary
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import android.app.Activity;
import android.content.Context;
import android.os.Environment;
import android.content.DialogInterface;
import android.graphics.Color;
import android.widget.TextView;
import android.view.Gravity;
import processing.core.PApplet;
import android.app.Activity;
import android.app.AlertDialog;
fileOutput f;
String s2 = "oifoifnowibf";
void settings() {
size(600, 600, P2D);
};
public void setup() {
f = new fileOutput(this);
f.setLocation("notes/test.txt");
f.setAndroidDialogue("No","Yessss");
};
public void draw() {
background(255);
if (f.fileContent!=null) {
fill(0);
text(f.counter, 20, 10);
text(f.fileContent, 20, 20);
} else {
fill(0);
text("no file", 20, 20);
}
};
void mousePressed() {
if (f.writeFile) {
f.writeLn(s2+hour()+":"+minute()+":"+second());
f.close();
f.loadStrings();
}
if(!f.writeFile)f.dialogBox();
};
Summary
class fileOutput {
public PApplet applet;
public FileWriter output;
float x, y, w, h;
public boolean save, onMouseUp, mdown, debug, append = true, appendFile, match,
append2, overWrite = true, overWriteOnce = true, writeOnce, writeFile, click,
getPermission = true, fileExists, reWrite;
public int counter=-1, counter2;
public File file, file2, file3;
public File SDcards ;
public String location, filePath, folderPath = “”;
String text = “oioijsofoivnsoindv”, absolutePath, ext, fileName, fileContent = “”;
String androidDialogueTitle = “Would you like to overWrite”,
dialogueB1Title = “”,dialogueB2Title = “”,dialogueBody;
Permission p;
Activity activity;
Context context;
TextView msg;
int msgId;
fileOutput() {
};
fileOutput(boolean a, PApplet applet) {
this.applet = applet;
p = new Permission(applet, "WRITE_EXTERNAL_STORAGE");
overWrite = true;
appendFile = true;
};
fileOutput(PApplet app) {
applet = app;
p = new Permission(applet, “WRITE_EXTERNAL_STORAGE”);
//init();
};
//currently unused
fileOutput(String location, PApplet applet) {
this.applet = applet;
p = new Permission(applet, "WRITE_EXTERNAL_STORAGE");
setLocation(location);
init();
};
fileOutput(PApplet applet, String location) {
this.applet = applet;
p = new Permission(applet, "WRITE_EXTERNAL_STORAGE");
setLocation(location);
init();
};
void getAndroidInfo() {
activity = applet.getActivity();
context = activity.getApplicationContext();
absolutePath = new String(Environment.getExternalStorageDirectory().getAbsolutePath());
};
void init() {
x = 0;
y = 0;
w = applet.width;
h = applet.height;
String s1 = "Would you like to overWrite "+fileName+"."+ext+"?";
float dboxWidth = 120;
float tSize = 20;
applet.textSize(tSize);
float dw = applet.textWidth(s1)+100;
float dboxHeight = 150;
float dx = applet.width/2-dw/2;
float dy = applet.height/2-50/2;
};
void loadStrings() {
loadFile(context);
};
String loadFile(Context context) {
FileInputStream fis = null;
if (writeFile) {
try {
if (!reWrite)fis = new FileInputStream (new File(file2.getAbsolutePath()));
else fis = new FileInputStream (new File(file3.getAbsolutePath()));
InputStreamReader isr = new InputStreamReader(fis);
// READ STRING OF UNKNOWN LENGTH
StringBuilder sb = new StringBuilder();
char[] inputBuffer = new char[2048];
int l;
// FILL BUFFER WITH DATA
while ((l = isr.read(inputBuffer)) != -1) {
sb.append(inputBuffer, 0, l);
println("write data", inputBuffer, 0, l);
}
// CONVERT BYTES TO STRING
fileContent = sb.toString();
fis.close();
}
catch (Exception e) {
println("cannot fetch file", e);
}
finally {
if (fis != null) {
fis = null;
}
}
}
return fileContent;
};
void open() {
};
void close() {
try {
output.flush();
output.close();
}
catch(IOException e) {
}
};
void write(String s) {
if (!overWrite)checkLocation();
try {
output = new FileWriter(file2, append);
}
catch(IOException e) {
}
printWrite(s);
};
void writeLn(String s) {
if (!overWrite)checkLocation();
try {
output = new FileWriter(file2, append);
}
catch(IOException e) {
}
printWriteLn(s);
};
void write(String s) {
if (!overWrite)checkLocation();
try {
output = new FileWriter(file2, append);
}
catch(IOException e) {
}
printWrite(s);
};
void writeLn(String s) {
if (!overWrite)checkLocation();
try {
output = new FileWriter(file2, append);
}
catch(IOException e) {
}
printWriteLn(s);
};
void printWrite(String s) {
if (!overWrite)checkLocation();
try {
output.append(s);
}
catch(IOException e) {
}
};
void printWriteLn(String s) {
if (!overWrite)checkLocation();
try {
output.append(s);
output.append(“\n”);
}
catch(IOException e) {
}
};
void printWrite(String s) {
if (!overWrite)checkLocation();
try {
for (int i=0; i<s.length; i++) {
output.append(s[i]);
}
}
catch(IOException e) {
}
};
void printWriteLn(String s) {
if (!overWrite)checkLocation();
try {
for (int i=0; i<s.length; i++) {
output.append(s[i]);
output.append(“\n”);
}
}
catch(IOException e) {
}
};
void checkLocation() {
boolean k = false;
String s1 = “Would you like to overWrite “+fileName+counter+”.”+ext+“?”;
try {
//
file = new File(absolutePath, folderPath);
if (!file.exists()&&counter==-1) {
file.mkdirs();
file2 = new File(file, “/”+fileName+“.”+ext);
androidDialogueTitle = file.getAbsolutePath();
PApplet.println(“checking file1”, file2);
if (file2.exists()) {
counter ++;
PApplet.println("File Exists");
//dbox.main.title.label = s1;
}
} else if (counter==-1) {
fileExists = true;
counter = 0;
k = true;
} else k = true;
if (overWrite&&writeOnce) {
k=false;
} else if (overWrite&&!writeOnce&&writeFile) {
writeOnce = true;
k = true;
}
boolean k1 = false;
if (writeFile)
while (k&&counter<100&&!k1) {
s1 = fileName+counter+"."+ext+"?";
try {
file2 = new File(absolutePath+"/"+folderPath+"/"+fileName+counter+"."+ext);
file3 = new File(absolutePath+"/"+folderPath+"/"+fileName+(counter)+"."+ext);
androidDialogueTitle = file3.getAbsolutePath();
if (file2.exists()) {
counter++;
} else {
PApplet.println("checking file2", file2);
//output = new FileWriter(file2, append);
k = false;
k1 = true;
break;
}
}
catch (Exception e) {
PApplet.println("Error while saving file: " + e);
}
}
if (k1||!writeFile) {
//PApplet.println("file",file);
//PApplet.println("Fname",folderName);
//PApplet.println("fileName",fileName);
//PApplet.println("counter",counter);
//PApplet.println("ext",ext);
if (file2==null&&counter<0)file2 = new File(file+"/"+fileName+"."+ext);
else if (file2==null)file2 = new File(file+"/"+fileName+"."+ext);
if (output==null) {
//img.save(file+"/"+fileName+counter+"."+ext);
if (writeFile)output = new FileWriter(file2, append);
PApplet.println("File saved successfully.");
//use write or append
}
}
if (reWrite) {
file2 = new File(file+"/"+fileName+counter+"."+ext);
output = new FileWriter(file2, append);
}
println("write file", folderPath, fileName, counter, ext);
if (reWrite)overWrite = true;
}
catch (IOException e) {
e.printStackTrace();
}
};
void listen() {
//if(writeFile&&dbox.main.getButton(0).click)checkLocation();
};
void setLocation(String s) {
if (getPermission)getAndroidInfo();
location = s;
folderPath = s.substring(0, s.lastIndexOf(“/”));
fileName = s.replace(folderPath+“/”, “”);
getExt(fileName);
PApplet.println(“Fname”, folderPath);
PApplet.println(“fileName”, fileName);
PApplet.println(“counter”, counter);
PApplet.println(“ext”, ext);
checkLocation();
init();
}
void getExt(String location) {
int count = 0;
fileName = location.substring(0, location.indexOf("."));
ext = location.replace(fileName, "");
ext = ext.replace(".", "");
ext = ext.replace(fileName, "");
};
void dialogBox() {
msg = new TextView(activity);
msg.setBackgroundColor(Color.BLUE);
msg.setTextSize(32);
msg.setText(dialogueBody);
msg.setGravity(Gravity.CENTER_HORIZONTAL);
msg.setTextColor(Color.WHITE);
activity.runOnUiThread(new Runnable() {
public void run() {
AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setView(msg);
androidDialogueTitle += " "+fileName+"."+ext+"?";
builder.setTitle(androidDialogueTitle);
builder.setPositiveButton(dialogueB1Title,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
writeFile = true;
overWrite = false;
reWrite = true;
}
}
);
builder.setNegativeButton(dialogueB2Title,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
writeFile = true;
overWrite = true;
//act.finish();
}
}
)
.show();
}
}
);
};
void setAndroidDialogue(String s1,String s2){
dialogueB1Title = s1;
dialogueB2Title = s2;
};
void setAndroidDialogue(String s1,String s2,String s3){
androidDialogueTitle = s1;
dialogueB1Title = s2;
dialogueB2Title = s3;
};
void setAndroidDialogueTitle(String s1){
androidDialogueTitle = s1;
};
void setDialogueColor(){
};
public boolean click() {
boolean k = false;
if (pos()&&applet.mousePressed&&!click) {
click = true;
k = false;
} else if (click&&!applet.mousePressed) {
k = true;
click = false;
}
return k;
};
public boolean pos(PVector mouse) {
return mouse.x>x&&mouse.x<x+w&&mouse.y>y&&mouse.y<y+h;
};
public boolean pos() {
return applet.mouseX>x&&applet.mouseX<x+w&&applet.mouseY>y&&applet.mouseY<y+h;
};
};
Permissions
Summary
public class Permission{
PApplet parent;
String p;
public Permission(PApplet pParent,String permissionName) {
p = permissionName;
parent = pParent;
parent.requestPermission("android.permission."+permissionName, "onPermissionResult", this);
println(permissionName);
};
public void onPermissionResult(boolean granted) {
if (!granted) {
PApplet.println("User did not grant",p," permission.",p,"is disabled.");
}
};
};
f.setLocation("xml/test.xml");
