Encrypt and Decrypt any File IN Android or Java

Encrypt and Decrypt any File IN Android or Java



package com.example.encryption;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String key = "squirrel123"; // needs to be at least 8 characters for DES
try{ Log.e("started", "");
FileInputStream fis = new FileInputStream("sdcard/raj.jpg");

FileOutputStream fos = new FileOutputStream("sdcard/c.txt");
encrypt(key, fis, fos);

FileInputStream fis2 = new FileInputStream("sdcard/c.txt");
FileOutputStream fos2 = new FileOutputStream("sdcard/c.jpg");
decrypt(key, fis2, fos2);
}catch(Exception e){e.printStackTrace();} catch (Throwable e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public static void encrypt(String key, InputStream is, OutputStream os) throws Throwable {
encryptOrDecrypt(key, Cipher.ENCRYPT_MODE, is, os);
}

public static void decrypt(String key, InputStream is, OutputStream os) throws Throwable {
encryptOrDecrypt(key, Cipher.DECRYPT_MODE, is, os);
}

public static void encryptOrDecrypt(String key, int mode, InputStream is, OutputStream os) throws Throwable {

DESKeySpec dks = new DESKeySpec(key.getBytes());
SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
SecretKey desKey = skf.generateSecret(dks);
Cipher cipher = Cipher.getInstance("DES"); // DES/ECB/PKCS5Padding for SunJCE

if (mode == Cipher.ENCRYPT_MODE) {
cipher.init(Cipher.ENCRYPT_MODE, desKey);
CipherInputStream cis = new CipherInputStream(is, cipher);
doCopy(cis, os);
} else if (mode == Cipher.DECRYPT_MODE) {
cipher.init(Cipher.DECRYPT_MODE, desKey);
CipherOutputStream cos = new CipherOutputStream(os, cipher);
doCopy(is, cos);
}
}

public static void doCopy(InputStream is, OutputStream os) throws IOException {
byte[] bytes = new byte[64];
int numBytes;
while ((numBytes = is.read(bytes)) != -1) {
os.write(bytes, 0, numBytes);
}
os.flush();
os.close();
is.close();
}
}

List Of Remote Folders

Create a List Of Remote Folders using JSCH for android, Java in a ListView In Dialog Box.

import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Vector;

import com.example.newsync.R;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.os.Bundle;
import android.os.Handler;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class Listremote extends Activity{
ChannelSftp sftpChannel;
ListAdapter adapter;
ArrayAdapter<String> adaptor;
com.jcraft.jsch.ChannelSftp.LsEntry lsEntry ;
private Item[] fileList;
ArrayList<String> list = new ArrayList<String>();
String path;
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);


JSch jsch = new JSch();
Session session = null;
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
try {
session = jsch.getSession("USER Name", "Host Address", 22);
session.setConfig("StrictHostKeyChecking", "no");
session.setPassword("Password");
session.connect();
Channel channel = session.openChannel("sftp");
Handler h = new Handler(Listremote.this.getMainLooper());
h.post(new Runnable() {
@Override
public void run() {
Toast.makeText(Listremote.this, "Connecting",
Toast.LENGTH_LONG).show();
}
});
channel.connect();
h.post(new Runnable() {
@Override
public void run() {
Toast.makeText(Listremote.this, "Connected",
Toast.LENGTH_LONG).show();
}
});
sftpChannel = (ChannelSftp) channel;
sftpChannel.cd(".");


try {

if(path==null){
Log.e("path null", "path null");
path=".";

}
@SuppressWarnings("rawtypes")
Vector files = sftpChannel.ls(path);
if (files.size() == 0) {
Toast.makeText(getApplicationContext(),
"No files are available for download.", 4)
.show();
} else {
for (int i = 0; i < files.size(); i++) {
lsEntry = (com.jcraft.jsch.ChannelSftp.LsEntry) files
.get(i);
if (lsEntry.getAttrs().isDir()&& !lsEntry.getFilename().equals(".")
&& !lsEntry.getFilename().equals("..")&&!lsEntry.getFilename().startsWith(".")&&!lsEntry.getFilename().startsWith("..")){
// Log.e(lsEntry.toString(), "files");
//List items = Arrays.asList(lsEntry.getFilename());
list.add(lsEntry.getFilename());

//Log.e(""+items.toString(), "items");
// Log.e(lsEntry.getAttrs().getSize()+"","lsentry Size");
// Log.e(lsEntry+"","list Size");
fileList = new Item[list.size()];

for (int j = 0; j < list.size(); j++) {
fileList[j] = new Item(list.toString(), R.drawable.directory_icon);

}
Log.e("file list "+fileList, "list "+list.toString());
//List<String> colorChoices = list;
//Log.e(colorChoices+"","list ");
adaptor = new ArrayAdapter<String>(
this,android.R.layout.select_dialog_item, android.R.id.text1, list){
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// creates view
View view = super.getView(position, convertView, parent);
TextView textView = (TextView) view
.findViewById(android.R.id.text1);

// put the image on the text view
textView.setCompoundDrawablesWithIntrinsicBounds(
fileList[position].icon, 0, 0, 0);

// add margin between image and text (support various screen
// densities)
int dp5 = (int) (5 * getResources().getDisplayMetrics().density + 0.5f);
textView.setCompoundDrawablePadding(dp5);

return view;
}
};


}

}
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Remote Files");

builder.setAdapter(adaptor, new DialogInterface.OnClickListener() {
   public void onClick(DialogInterface dialog, int item) {
    String itemname = adaptor.getItem(item);
    Log.e(""+itemname,"file Clicked");
   // String chosenFile = fileList[item].file;
    path=itemname;

   }
});
builder.show();}
}catch(Exception e){e.printStackTrace();}

//sftpChannel.put("" + sel, "Desktop/");

//String r = userId + "." + sel.getName();
//sftpChannel.rename("Desktop/" + sel.getName(),
// "Desktop/" + r);
h.post(new Runnable() {
@Override
public void run() {
try {
/*
AlertDialog.Builder builder = new AlertDialog.Builder(
Listremote.this);
builder.setMessage(
"File Sent Successfully")
.setCancelable(false)
.setPositiveButton(
"Listremote More",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface dialog,
int id) {
//loadFileList();
//showDialog(1);

}
});
builder.setNegativeButton(
"Not now",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface dialog,
int id) {
//dialog.cancel();
finish();
}
});
AlertDialog alert = builder.create();
alert.show();
*/
} catch (Exception e) {
e.printStackTrace();
}
}
});
sftpChannel.exit();
session.disconnect();
//Log.e("" + sel, "FileClicked");
} catch (final JSchException e) {
runOnUiThread(new Runnable() {
@SuppressLint("ShowToast")
@Override
public void run() {
Toast.makeText(
Listremote.this,
"Check Host, Username and Password "
+ e.getMessage().toString(),
10).show();
}
});

e.printStackTrace();
} catch (final SftpException e) {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(
Listremote.this,
"error - server not responding"
+ e.getMessage().toString(),
Toast.LENGTH_LONG).show();
}
});
e.printStackTrace();

}


}private class Item {
public String file;
public int icon;

public Item(String file, Integer icon) {
this.file = file;
this.icon = icon;
}

@Override
public String toString() {
return file;
}
}

}

Rsync Working Example Android

Rsync Working Sample Android
Properly Tested Example
If need any help just mail @ rajeshsaini890@gmail.com

first you need to download rsyncdroid project from google project by svn
http://code.google.com/p/rsyncdroid/source/checkout
type command in terminal sudo apt-get install subversion
to install svn then copy svn command from project page and paste to terminal 
then import the downloaded project to eclipse
now 
first replace the complete code given in Rsyncdroid.class file with the give below
and now copy rsync binary file form R.raw.rsync and paste it to device folder /system/xbin/rsync you can use rootexplorer.apk to do this
now 
you need to generate dss_key and dss_key.pub by using dropbearkey
then put dss_key and dss_key.pub file in sdcard.
then copy contents of dss_key.pub and paste to the server or your computers folder Home/.ssh/ AuthorizedKeys file.
This is posswordless authentication.

now put your host username in rsync command source directory and resource directory and path of dss_key file in sdcard  as given below
and run program.




import java.io.BufferedOutputStream;


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.Writer;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;


import android.util.Log;
import android.app.Activity;
import android.content.Context;
import android.content.ContextWrapper;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class RsyncDroid extends Activity {

private static final String LOG_TAG = "RsyncDro";
private static final String RSYNCD_DIR = "/sdcard/rsyncdroid/";
private static final String RSYNCD_CONF = "/sdcard/rsyncdroid/rsyncd.conf";
private String RSYNCD_BIN = "/system/xbin/rsync";
private String RSYNC_PATH = "";
private String RSYNC_BIN = "rsync";
private Process process;
private Boolean USE_ROOT = true;
// private String MY_USERNAME = "";
private static final String[] DEFAULT_CONF = { "uid=0", "gid=0",
"read only = yes", "use chroot = no", "", "[sdcard]",
" path = /sdcard/Urotab/", " comment = SD Card" };
OutputStream os;
CheckBox CheckboxRunning;
Button btnStart;
Button btnStop;
EditText txtBox;
TextView conftxt;
Boolean bool1 = true;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

CheckboxRunning = (CheckBox) findViewById(R.id.Running);
txtBox = (EditText) findViewById(R.id.RsyncdConf);
conftxt = (TextView) findViewById(R.id.ConfText);

btnStart = (Button) findViewById(R.id.ButtonStart);
btnStart.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// save conf in file
saveConf();
startRsync();
Log.d(LOG_TAG, "onCreate() rsync started...");
changeStatus();
if (statusRsync()) {
showMsg("rsync started");
}
setResult(android.app.Activity.RESULT_OK);
}

});

btnStop = (Button) findViewById(R.id.ButtonStop);
btnStop.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
if (stopRsync()) {
showMsg("rsync stopped");
setResult(android.app.Activity.RESULT_OK);
}
changeStatus();
}

});

// load configuration in txtBox
txtBox.setText(loadConf().toString());

// MY_USERNAME=getUsername();

// change checkbox status
changeStatus();

RSYNC_PATH = rsync_path();
RSYNCD_BIN = RSYNC_PATH + RSYNC_BIN;

if (!new File(RSYNCD_BIN).exists()) {
installRsync(RSYNCD_BIN, R.raw.rsync);
showMsg("rsync installed on " + RSYNCD_BIN);
}
}

public void changeStatus() {
if (statusRsync()) {
CheckboxRunning.setChecked(true);
txtBox.setVisibility(View.INVISIBLE);
conftxt.setVisibility(View.INVISIBLE);
} else {
CheckboxRunning.setChecked(false);
txtBox.setVisibility(View.VISIBLE);
conftxt.setVisibility(View.VISIBLE);
}

}

@SuppressWarnings("static-access")
public void startRsync() {


if (!new File(RSYNCD_BIN).exists()) {
showMsg("rsync not installed");
return;
}

Thread thread = new Thread() {
@Override
public void run() {
try {
List<String> commands = new ArrayList<String>();
int i = 1, j = 1;

commands.add("/rsync".substring(i));
commands.add("-vvvrHrltD");

commands.add("--chmod=Du+rwx,go-rwx,Fu+rw,go-rw");
commands.add("--no-perms");
commands.add("-e");
commands.add("/ssh".substring(j) + " -y -p "
+ Integer.valueOf(22)
+ " -i '/sdcard/dss_key' ");
commands.add("/sdcard/Urotab/");
commands.add(("root") + "@" + "YOUR IP"
+ ":" + "Desktop/urosecure/");

ProcessBuilder pb = new ProcessBuilder(commands);
try {
Process prs = pb.start();
InputStream stderr = prs.getErrorStream();
InputStream stdout = prs.getInputStream();

BufferedReader stdoutReader = new BufferedReader(
new InputStreamReader(stdout));
BufferedReader stderrReader = new BufferedReader(
new InputStreamReader(stderr));

System.out
.println("Here is the output from stdout:");

while (true) {
String line = stdoutReader.readLine();
if (line == null) {
stdoutReader.close();
break;
}
System.out.println(line);
}

System.out
.println("Here is the output from stderr:");

while (true) {
String line = stderrReader.readLine();
if (line == null) {
stderrReader.close();
break;
}
System.out.println(line);
}

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

} catch (Exception e) {
e.printStackTrace();
}

}

};
thread.start();

try {
Thread.currentThread().sleep(2000);// sleep for 2000 ms
} catch (InterruptedException e) {
e.printStackTrace();
}


}




public boolean stopRsync() {
String pid;
String temp;
pid = "";
int i;
try {
Process p = Runtime.getRuntime().exec("ps");
p.waitFor();

BufferedReader stdInput = new BufferedReader(new InputStreamReader(
p.getInputStream()));
while ((temp = stdInput.readLine()) != null) {
// Log.d(LOG_TAG, "stopRsync() temp='"+temp+"'");
if (temp.contains(RSYNCD_BIN)) {
// Log.d(LOG_TAG, "statusRsync() temp='"+temp+"'");
String[] cmdArray = temp.split(" +");
for (i = 0; i < cmdArray.length; i++) {
Log.d(LOG_TAG, "loop i=" + i + " => " + cmdArray[i]);
}
pid = cmdArray[1];
}
}

} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}

Log.d(LOG_TAG, "statusRsync() pid='" + pid + "'");

// if pid
if (pid != "") {
Log.d(LOG_TAG, "statusRsync() killing='" + pid + "' ...");
try {
if (USE_ROOT) {
process = Runtime.getRuntime().exec("su -c sh");
OutputStream os = process.getOutputStream();
writeLine(os, "kill -9 " + pid);
os.flush();
writeLine(os, "exit \n");
os.flush();
process.waitFor();
return true;
} else {
process = Runtime.getRuntime().exec("sh");
OutputStream os = process.getOutputStream();
writeLine(os, "kill -9 " + pid);
os.flush();
writeLine(os, "exit \n");
os.flush();
process.waitFor();
return true;
}

} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
Log.d(LOG_TAG, "statusRsync() pid empty='" + pid + "'");
return false;
}

public boolean statusRsync() {
boolean run;
String temp;

run = false;
Log.d(LOG_TAG, "statusRsync() init");

try {
Process p = Runtime.getRuntime().exec("ps");
p.waitFor();

BufferedReader stdInput = new BufferedReader(new InputStreamReader(
p.getInputStream()));
while ((temp = stdInput.readLine()) != null) {
// Log.d(LOG_TAG, "statusRsync() temp='"+temp+"'");
if (temp.contains("app_bin/rsync")) {
Log.d(LOG_TAG, "statusRsync() FOUND temp='" + temp + "'");
run = true;
}
}
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
return run;
}

public String loadConf() {
String Script = "";
File rsyncd_conf_folder = new File(RSYNCD_DIR);

if (!rsyncd_conf_folder.exists()) {
Log.d(LOG_TAG, "Creating " + RSYNCD_DIR + " folder");
rsyncd_conf_folder.mkdir();
showMsg("Created " + RSYNCD_DIR + " folder");
} else {
Log.d(LOG_TAG, RSYNCD_DIR + " exists");
}

// create rsyncd.conf
if (!new File(RSYNCD_CONF).exists()) {
showMsg("rsyncd.conf no exists");
for (int i = 0; i < DEFAULT_CONF.length; i++) {
Script += DEFAULT_CONF[i] + "\n";
}
return Script;
}

try {
BufferedReader in = new BufferedReader(new FileReader(RSYNCD_CONF));
String str;

while ((str = in.readLine()) != null) {
Script += str + "\n";
}
in.close();
} catch (Exception ex) {
showMsg("Can't read rsyncd.conf");
return Script;
}

return Script;
}

public void saveConf() {
Writer output = null;
Log.d(LOG_TAG, "saveConf() init");
try {
output = new BufferedWriter(new FileWriter(RSYNCD_CONF));
output.write(txtBox.getText().toString());
output.close();
Log.d(LOG_TAG, "saveConf() saved and closed");
} catch (IOException e) {
e.printStackTrace();
}
}

public void showMsg(String txt) {
CharSequence text = txt;
int duration = Toast.LENGTH_LONG;
Toast toast = Toast.makeText(this, text, duration);
toast.show();
Log.d(LOG_TAG, "showMsg() txt='" + txt + "'");
}

public static void writeLine(OutputStream os, String value)
throws IOException {
String line = value + "\n";
os.write(line.getBytes());
}

private void installRsync(String ff_file, int rawid) {

Log.d(LOG_TAG, "installRsync() **rsync_abspath=" + ff_file + "**");

if (!new File(ff_file).exists()) {
InputStream rsyncraw;
Log.d(LOG_TAG, "installRsync() **no exists, copy...**");
try {
rsyncraw = getResources().openRawResource(rawid);
} catch (Exception e) {
e.printStackTrace();
Log.d(LOG_TAG, "installRsync() **Exception**");
return;
} finally {
Log.d(LOG_TAG, "installRsync() ** OPENED rsync_abspath="
+ ff_file + "**");
}
BufferedOutputStream fOut = null;
try {
fOut = new BufferedOutputStream(new FileOutputStream(ff_file));
byte[] buffer = new byte[32 * 1024];
int bytesRead = 0;
while ((bytesRead = rsyncraw.read(buffer)) != -1) {
fOut.write(buffer, 0, bytesRead);
}
Log.d(LOG_TAG, "installRsync() **no exists, copy done**");
Runtime.getRuntime().exec("chmod 755 " + ff_file);
} catch (Exception e) {
e.printStackTrace();
Log.d(LOG_TAG, "installRsync() **Exception**");
} finally {
try {
rsyncraw.close();
fOut.close();
} catch (IOException e) {
e.printStackTrace();
Log.d(LOG_TAG, "installRsync() **Exception**");
}
}
}
}

private String rsync_path() {
ContextWrapper cw = new ContextWrapper(getBaseContext());
File directory = cw.getDir("bin", Context.MODE_PRIVATE);
String rsync_abspath = directory + "/";
return rsync_abspath;
}

/*
* private String getUsername() { String temp=""; try{ Process p =
* Runtime.getRuntime().exec("whoami"); p.waitFor();
*
* BufferedReader stdInput = new BufferedReader(new
* InputStreamReader(p.getInputStream())); while ( (temp =
* stdInput.readLine()) != null ) { Log.d(LOG_TAG,
* "getUsername() temp='"+temp+"'"); if ( temp != "" ) { return temp; } }
*
* } catch (IOException e) { e.printStackTrace(); } catch
* (InterruptedException e) { e.printStackTrace(); }
*
* return temp; }
*/
}

Android Check IS internet connceted or not android programming

ConnectivityManager connectivity = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);

   if (connectivity != null) 
   {
       NetworkInfo[] info = connectivity.getAllNetworkInfo();

       if (info != null) 
       {
           for (int i = 0; i < info.length; i++) 
           {
               Log.i("Class", info[i].getState().toString());
               if (info[i].getState() == NetworkInfo.State.CONNECTED) 
               {
                if(info[i].getState().toString()=="CONNECTED"){
                Log.e("Network","connected");

                }

else{
}
                  
               }
           }
       }
   }

Mdu result Declered

Mdu result Declered

Click Here

Change circle image of radio button android

change circle image of radio button

go to drawable folder and create a xml file named button_radio.xml

paste this in button_radio.xml file


<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/radio_on" android:state_checked="true" android:state_pressed="false"/>
    <item android:drawable="@drawable/radio_off" android:state_checked="false" android:state_pressed="false"/>

</selector>


now downlaod these images radio_off.png , radio_on.png here

put these images in drawable folder

now in Activity file
put


RadioButton rb1;

rb1.setButtonDrawable(R.drawable.button_radio);

Use external fonts in android programming

Use hindi fonts android programming
Use external fonts android programming

Inside the assets folder of your project create a new folder and name it as fonts. Copy the font(.ttf) files in this folder. In our case the font files are RockFont.ttf and FEASFBRG.TTF.

setContentView(R.layout.main);
        Typeface font1 = Typeface.createFromAsset(getAssets(), "fonts/RockFont.ttf");
        Typeface font2 = Typeface.createFromAsset(getAssets(), "fonts/FEASFBRG.TTF");
        TextView customText1 = (TextView)findViewById(R.id.text1);
        TextView customText2 = (TextView)findViewById(R.id.text2);

        customText1.setTypeface(font1);
        customText1.setTextSize(40.f);
        customText1.setText("Hello! This is a custom font...");
        
        customText2.setTypeface(font2);
        customText2.setTextSize(30.f);
        customText2.setText("Developed by www.bOtskOOl.com");
        
  

Button Animation android

Button Animation android
create folder anim in res folder
then create xml file name anim_rotate.xml

paste this to anim_rotate.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/linear_interpolator">
<rotate
android:fromDegrees="0"
android:toDegrees="360"
android:pivotX="50%"
android:pivotY="50%"
android:duration="500"
android:startOffset="0"
android:repeatCount="1"
android:repeatMode="reverse" />
</set>


now declare this in Activity

final Animation animRotate = AnimationUtils.loadAnimation(this, R.anim.anim_rotate);

Button b1 = (Button)findViewById(R.id.button);
b1.startAnimation(animRotate);

Create Android icons acording to your phone

Create and modify android graphics online
create graphics according to all devices in android
a folder of res will be created and it will contain all supported images for all devices
Android Asset Studio

http://android-ui-utils.googlecode.com/hg/asset-studio/dist/icons-generic.html#source.space.trim=1&source.space.pad=0&size=24&padding=8&color=33b5e5%2C0&name=ic_example

set package install location android

set application install location android
set install location to sdcard android

put android:installLocation="preferExternal"

under <manifest xmlns:android="http://schemas.android.com/apk/res/android">
in menifest.xml file


code should appears like

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
android:installLocation="preferExternal">

for setting install location to phone put "preferInternal" in place of "preferExternal"

Create Transparent button android

make button transprent android
android transparent button


put this in xml file of button

android:background="@android:color/transparent"

all screen supporting android

to support all size screens in android


<supports-screens android:smallscreens="true">
<supports-screens android:normalscreens="true">
<supports-screens android:largescreens="true">
<supports-screens android:anydensity="true">
<supports-screens android:anydensity="true"
android:resizeable="true">

put these in manifest.xml

Disable back button android

Disable back button
disable home button android


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
boolean i = false;
if ((keyCode == KeyEvent.KEYCODE_BACK)) {

i=true;
}
return i;
}


to disable home button put KEYCODE_HOME

Android home button

perform task on press home button


or close activity on press home button android

@Override
protected void onPause()
{
super.onPause();
finish();
this.finish();
System.exit(0);
// insert here your instructions
}

Create alert dialog box android

create stylish alert dialog box android
create about us page android

Button b5;
b5=(Button)findViewById(R.id.aboutus);
b5.setOnClickListener(new OnClickListener() {

@SuppressWarnings("deprecation")
public void onClick(View v) {
// TODO Auto-generated method stub

AlertDialog alertDialog = new AlertDialog.Builder(
easyselect.this).create();

// Setting Dialog Title
alertDialog.setTitle("Europa TechnoSoft pvt. ltd");

// Setting Dialog Message
alertDialog.setMessage("Europa Technosoft was initially set up as" +
" a single product company at New Delhi, today it is a multi-product " +
"and multi-technology with its marketing network spread across the country." +
" The Company over the yearÂ’s mirrors and advances in technological innovations," +
" with which it has kept pace. The Company's efforts for business excellence" +
" has been recognized time and again by its customers & others.");

// Setting Icon to Dialog
alertDialog.setIcon(R.drawable.tick);

// Setting OK Button
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {


}
});

// Showing Alert Message
alertDialog.show();

}
});


Download Image tick.png here

how to make button unclickable if radio button is not selected

button.setEnabled(false);

Timer in android

How to set coundown timer in android
reverse countdown android

first declare textview


TextView tv = (TextView)findViewById(R.id.textView1);


new CountDownTimer(30000, 1000) {

public void onTick(long millisUntilFinished) {
tv.setText("Seconds remaining: " + millisUntilFinished / 1000);
}

public void onFinish() {
tv.setText("done!");
}
}.start();


timer for 30 sec.. is ready