I am trying to generate a pdf file in android OS with android coding but its not possible with iText packages(used in java for generate a pdf file in windows) because Google android does not accepts to include iText in the application. Because
android has separate virtual machine (Dalvik) and it does not support
all java classes.
So i found a new solution for this problem now i am using pdflib for generate the pdf documents in android OS.
use this code for generate the pdf document in android
hello_android.java
package com.pdflib;
import java.io.File;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.util.Log;
public class hello_android extends Activity implements OnClickListener {
TextView textResult;
Button buttonGo;
EditText editInput;
private static final String TAG = "PDFlib";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Find UI views
textResult = (TextView) findViewById(R.id.textResult);
buttonGo = (Button) findViewById(R.id.buttonGo);
buttonGo.setOnClickListener(this);
}
public void onClick(View view) {
String out = "OK";
/* This is where the data files are. Adjust as necessary. */
final String searchpath = "/data/data/com.pdflib/data";
File sdCard = Environment.getExternalStorageDirectory();
File dir = new File(sdCard.getAbsolutePath()
+ "/stericheck.pdf");
final String outfile = ""+dir;
/*
* example how to switch on logging
final String logging = "filename=/data/data/com.pdflib/trace.txt";
*/
pdflib p = null;
int font;
try {
p = new pdflib();
/*
*p.set_parameter("logging", logging);
*/
p.set_parameter("SearchPath", searchpath);
/* This means we must check return values of load_font() etc. */
p.set_parameter("errorpolicy", "return");
if (p.begin_document(outfile, "") == -1)
throw new Exception("Error: " + p.get_errmsg());
p.set_info("Creator", "hello.java");
p.set_info("Author", "Thomas Merz");
p.set_info("Title", "Hello world (Java)!");
p.begin_page_ext(595, 842, "");
font = p.load_font("Helvetica-Bold", "unicode", "");
if (font == -1)
throw new Exception("Error: " + p.get_errmsg());
p.setfont(font, 24);
p.set_text_pos(50, 700);
p.show("Hello world!");
p.continue_text("(says Java)");
p.end_page_ext("");
p.end_document("");
}
catch (PDFlibException e) {
out = "PDFlib exception" + "[" + e.get_errnum() + "] "
+ e.get_apiname() + ": " + e.get_errmsg() + "\n";
Log.d(TAG, out);
}
catch (Exception e) {
out = "Exception: " + e.getMessage();
Log.d(TAG, out);
}
finally {
if (p != null) {
p.delete();
}
}
textResult.setText(out);
}
}
also add two another java files put in Package Link for download the sample project of PDF creator project is given below
open above link and click on download now button the sign up for new account or login with existing account.......then download
extract
the android-sdk-windows file in any location of ur hard disk (in my
case it is located in D: drive) then follow the images one by one 1 to 8
then
Copy .APK files:
Now, manually copy and paste the SterilityTestSystem.apk(your .apk file) to the destination folder "D:\android-sdk-windows\platform-tools\".
wait for start emulator like image 8 Run adb command:
Go to Start>>run>>cmd (open a windows command prompt or shell) and type the following commands "highlighted in bold orange". cd d:\android-sdk-windows\platform-tools\ comments: we do this in order to change our directory level to where the emulator is installed
adb install Sudoku.apk comments: android emulator command to install the SterilityTestSystem application in .apk format.
Thats all, it's done. You must get a success message, Hurray!! You have installed your application successfully.
then check application in apps category of emulator
I recently bought an Arduino ADK board, after downloading the sample
code I was overwhelmed with the amount of C and Java code I saw.
Furthermore the sample code requires that you have all these sensors
that are sold separately on top of the already expensive board, and this
is supposed to be a beginners board?
But enough with the rant, I’ve managed to trimmed the C and JAVA down
to what is only necessary to blink the built in LED in the Arduino, the
full code and explanation is here, please spread it around.
The App’s Interface
The Android app consists of a toggle button which we’ll use to toggle
the state, on or off, of the LED. In Android user interfaces are called
layouts, so let’s make a layout with a toggle button.
Android app interface as seen in phone
The ToggleButton xml tag has several properties including dimensions
(width and height), position, text size and the ID and onClick
attributes. The ID attribute is used to identify inputs (buttons, check
boxes etc) in our Java code, the onClick attribute is the function which
will executed upon a click.
In the code above, our button’s ID is toggleButtonLED and the function to execute when it’s clicked is blinkLED.
Asking For Permission
Whenever you download an app, if you don’t just click OK on
everything without reading, you’ll notice that it lists some permissions
that it requires from the device. All these permissions are listed in
the Android manifest file ("manifest"? LOL sounds like a peace treaty
doesn’t it?), we need to list our USB permissions in this file.
Be sure to change the minSdkVersion to the Android SDK version your project is using.
How To Route Your USB Device To The Correct Application
The message you'll get when you connect your board to the Android device
Whenever you connect your board the Android device (phone or table) will
need to know which app the board uses, we do that with this file.
File: accessory_filter.xml
You may change the values in the attributes but they will have to same as in the Arduino file.
How To Handle The Clicks, Send Data To The Board
The following code is part of the ArduinoBlinkLED.java file, don’t
worry about where it goes for now, I will tell you that later, for now
just understand the following explanations.
To make our button be recognized by Java we need to store it in an object. So we declared our object as a ToggleButton object:
privateToggleButton buttonLED;
Then we store our button in the buttonLED object:
// toggleButtonLED is the name we used in the layout/main.xml code above.
// main comes from our interface's file name: main.xml
setContentView(R.layout.main);
To handle the button clicks we’ll need to make the function blinkLED,
just as we promised in the layout/main.xml code above. This is the
function’s code:
publicvoid blinkLED(View v){
byte[] buffer =newbyte[1];
if(buttonLED.isChecked())
buffer[0]=(byte)0;// button says on, light is off
else
buffer[0]=(byte)1;// button says off, light is on
if(mOutputStream !=null){
try{
mOutputStream.write(buffer);
}catch(IOException e){
Log.e(TAG,"write failed", e);
}
}
}
What we are doing here is we are making a byte array which will hold
the value 0 if the button is checked and the value 1 if it’s not
checked, read the comments in the code. The byte is sent to the Arduino
ADK board by the write function.
We’ll continue in the same file on the next section.
Android Arduino Communication
The code that handles USB communication is standard code you’ll need
for all your apps, you can either not worry about it or simply check out
each function and by the variable names am confident you’ll understand
what it’s doing, also in the code to handle clicks is included here. Am
sorry I can’t explain each piecebut as you’ll see it could take a while,
but the important part is what I explained above.
We only need ONE java file, not 100′s like the "demo" version and here it is.
Here comes the easy part. This is the only Arduino code you need.
Notice how the manufacturer, model and version values matches that of
our accessory_filter.xml file, if any of these change your board will
not know which app to load.
#include<Max3421e.h>
#include<Usb.h>
#include<AndroidAccessory.h>
#define LED_PIN 13
AndroidAccessory acc("Manufacturer",
"Model",
"Description",
"1.0",
"http://yoursite.com",
"0000000012345678");
void setup()
{
// set communiation speed
Serial.begin(115200);
pinMode(LED_PIN, OUTPUT);
acc.powerOn();
}
void loop()
{
byte msg[0];
if(acc.isConnected()){
int len = acc.read(msg,sizeof(msg),1);// read data into msg variable
if(len >0){
if(msg[0]==1)// compare received data
digitalWrite(LED_PIN,HIGH);// turn on light
else
digitalWrite(LED_PIN,LOW);// turn off light
}
}
else
digitalWrite(LED_PIN , LOW);// turn off light
}
File Locations
Just in case you don’t know where the code I gave you goes:
I recently bought an Arduino ADK board, after downloading the sample
code I was overwhelmed with the amount of C and Java code I saw.
Furthermore the sample code requires that you have all these sensors
that are sold separately on top of the already expensive board, and this
is supposed to be a beginners board?
But enough with the rant, I’ve managed to trimmed the C and JAVA down
to what is only necessary to blink the built in LED in the Arduino, the
full code and explanation is here, please spread it around.
The App’s Interface
The Android app consists of a toggle button which we’ll use to toggle
the state, on or off, of the LED. In Android user interfaces are called
layouts, so let’s make a layout with a toggle button.
Android app interface as seen in phone
The ToggleButton xml tag has several properties including dimensions
(width and height), position, text size and the ID and onClick
attributes. The ID attribute is used to identify inputs (buttons, check
boxes etc) in our Java code, the onClick attribute is the function which
will executed upon a click. File: layout/main.xml
In the code above, our button’s ID is toggleButtonLED and the function to execute when it’s clicked is blinkLED.
Asking For Permission
Whenever you download an app, if you don’t just click OK on
everything without reading, you’ll notice that it lists some permissions
that it requires from the device. All these permissions are listed in
the Android manifest file ("manifest"? LOL sounds like a peace treaty
doesn’t it?), we need to list our USB permissions in this file. File: AndroidManifest.xml
Be sure to change the minSdkVersion to the Android SDK version your project is using.
How To Route Your USB Device To The Correct Application
The message you'll get when you connect your board to the Android device
Whenever you connect your board the Android device (phone or table) will
need to know which app the board uses, we do that with this file.
File: accessory_filter.xml
You may change the values in the attributes but they will have to same as in the Arduino file.
How To Handle The Clicks, Send Data To The Board
The following code is part of the ArduinoBlinkLED.java file, don’t
worry about where it goes for now, I will tell you that later, for now
just understand the following explanations.
To make our button be recognized by Java we need to store it in an object. So we declared our object as a ToggleButton object:
privateToggleButton buttonLED;
Then we store our button in the buttonLED object:
// toggleButtonLED is the name we used in the layout/main.xml code above.
// main comes from our interface's file name: main.xml
setContentView(R.layout.main);
To handle the button clicks we’ll need to make the function blinkLED,
just as we promised in the layout/main.xml code above. This is the
function’s code:
publicvoid blinkLED(View v){
byte[] buffer =newbyte[1];
if(buttonLED.isChecked())
buffer[0]=(byte)0;// button says on, light is off
else
buffer[0]=(byte)1;// button says off, light is on
if(mOutputStream !=null){
try{
mOutputStream.write(buffer);
}catch(IOException e){
Log.e(TAG,"write failed", e);
}
}
}
What we are doing here is we are making a byte array which will hold
the value 0 if the button is checked and the value 1 if it’s not
checked, read the comments in the code. The byte is sent to the Arduino
ADK board by the write function.
We’ll continue in the same file on the next section.
Android Arduino Communication
The code that handles USB communication is standard code you’ll need
for all your apps, you can either not worry about it or simply check out
each function and by the variable names am confident you’ll understand
what it’s doing, also in the code to handle clicks is included here. Am
sorry I can’t explain each piecebut as you’ll see it could take a while,
but the important part is what I explained above.
We only need ONE java file, not 100′s like the "demo" version and here it is.
File: ArduinoBlinkLED.java
Here comes the easy part. This is the only Arduino code you need.
Notice how the manufacturer, model and version values matches that of
our accessory_filter.xml file, if any of these change your board will
not know which app to load.
#include<Max3421e.h>
#include<Usb.h>
#include<AndroidAccessory.h>
#define LED_PIN 13
AndroidAccessory acc("Manufacturer",
"Model",
"Description",
"1.0",
"http://yoursite.com",
"0000000012345678");
void setup()
{
// set communiation speed
Serial.begin(115200);
pinMode(LED_PIN, OUTPUT);
acc.powerOn();
}
void loop()
{
byte msg[0];
if(acc.isConnected()){
int len = acc.read(msg,sizeof(msg),1);// read data into msg variable
if(len >0){
if(msg[0]==1)// compare received data
digitalWrite(LED_PIN,HIGH);// turn on light
else
digitalWrite(LED_PIN,LOW);// turn off light
}
}
else
digitalWrite(LED_PIN , LOW);// turn off light
}
File Locations
Just in case you don’t know where the code I gave you goes:
