I'm able to clear a single package name's data through this snippet. However, i want it to handle more than one package names. in other words, it should clear two more package names' data
private void clearData() {
//"com.uc.browser.en"
//"pm clear com.sec.android.app.sbrowser"
String cmd = "pm clear com.sec.android.app.sbrowser" ;
ProcessBuilder pb = new ProcessBuilder().redirectErrorStream(true)
.command("su");
Process p = null;
try {
p = pb.start();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// We must handle the result stream in another Thread first
StreamReader stdoutReader = new StreamReader(p.getInputStream(),
CHARSET_NAME);
stdoutReader.start();
out = p.getOutputStream();
try {
out.write((cmd + "\n").getBytes(CHARSET_NAME));
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
out.write(("exit" + "\n").getBytes(CHARSET_NAME));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
out.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
p.waitFor();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String result = stdoutReader.getResult();
}
}
The ProcessCommandsSU class starts an su process in which to run a list of commands, and provides an interface to deliver the output to an Activity asynchronously. Unlike the example you're following, this class will not block the UI thread. The Activity must implement the OnCommandsReturnListener interface.
public class ProcessCommandsSU extends Thread {
public interface OnCommandsReturnListener {
public void onCommandsReturn(String output);
}
private final Activity activity;
private final String[] cmds;
public ProcessCommandsSU(Activity activity, String[] cmds) {
if(!(activity instanceof OnCommandsReturnListener)) {
throw new IllegalArgumentException(
"Activity must implement OnCommandsReturnListener interface");
}
this.activity = activity;
this.cmds = cmds;
}
public void run() {
try {
final Process process = new ProcessBuilder()
.redirectErrorStream(true)
.command("su")
.start();
final OutputStream os = process.getOutputStream();
final CountDownLatch latch = new CountDownLatch(1);
final OutputReader or = new OutputReader(process.getInputStream(), latch);
or.start();
for (int i = 0; i < cmds.length; i++) {
os.write((cmds[i] + "\n").getBytes());
}
os.write(("exit\n").getBytes());
os.flush();
process.waitFor();
latch.await();
process.destroy();
final String output = or.getOutput();
activity.runOnUiThread(new Runnable() {
#Override
public void run() {
((OnCommandsReturnListener) activity).onCommandsReturn(output);
}
}
);
}
catch (IOException | InterruptedException e) {
e.printStackTrace();
}
}
private class OutputReader extends Thread {
private final InputStream is;
private final StringBuilder sb = new StringBuilder();
private final CountDownLatch latch;
public OutputReader(InputStream is, CountDownLatch latch) {
this.is = is;
this.latch = latch;
}
public String getOutput() {
return sb.toString();
}
public void run() {
try {
final BufferedReader reader = new BufferedReader(
new InputStreamReader(is));
String line = "";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
}
catch (IOException e) {
e.printStackTrace();
}
latch.countDown();
}
}
}
Using the class is quite simple. We first ensure that our Activity implements the interface. We then create an instance, passing the Activity and our array of commands in the constructor, and call its start() method. In the following example, it's assumed that the Activity has a TextView named textOutput to display the returned output:
public class MainActivity extends Activity
implements ProcessCommandsSU.OnCommandsReturnListener {
...
#Override
public void onCommandsReturn(String output) {
textOutput.append(output + "\n");
}
private void runCommands() {
final String[] cmds = {
"ping -c 5 www.google.com",
"pm list packages android",
"chdir " + Environment.getExternalStorageDirectory(),
"ls"
};
new ProcessCommandsSU(MainActivity.this, cmds).start();
}
}
My device is not rooted, so this was tested with the commands you see in the code above. Simply replace those commands with your pm clear commands.
Related
I'm developing a project where client sends screenshots of its activity to server where the bitmap is converted to string.For me it works well.I would like to add a chat between client and server in this project.How can I achieve this?Any kind of help is accepted.
Client Code
public class Client2 extends AsyncTask<Void, Void, Void> {
public static String dstAddress;
int dstPort;
String response= new String() ;
String msg_server=new String();
Context context;
public static ArrayList<Bitmap>ss=new ArrayList<>();
public static Socket socket;
Client2(Context ic,String addr, int port,String msg) {
context=ic;
dstAddress = addr;
dstPort = port;
msg_server=msg;
}
#Override
protected Void doInBackground(Void... arg0) {
socket = null;
ObjectOutputStream dataOutputStream = null;
ObjectInputStream dataInputStream = null;
try {
socket = new Socket(dstAddress, dstPort);
dataOutputStream = new ObjectOutputStream(
socket.getOutputStream());
dataInputStream = new ObjectInputStream(socket.getInputStream());
if(msg_server != null){
dataOutputStream.writeObject(msg_server);
dataOutputStream.flush();
}
response = (String) dataInputStream.readObject();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
response = "UnknownHostException: " + e.toString();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
response = "IOException: " + e.toString();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} finally {
if (socket != null) {
try { socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataOutputStream != null) {
try {
dataOutputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataInputStream != null) {
try {
dataInputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
Toast.makeText(context, response, Toast.LENGTH_SHORT).show();
}}
Server Code
public class Server extends Thread{
ServerSocket serverSocket;
Viewer activity;
static final int SocketServerPORT = 8080;
int count = 0;
int sc=0;
Bitmap bmviewer;
String msgtoclient,msgfromclient;
ArrayList<Bitmap>ser=new ArrayList<>();
public Server(Activity context,String msg )
{
activity= (Viewer) context;
msgtoclient=msg;
}
#Override
public void run() {
Socket socket = null;
ObjectInputStream dataInputStream = null;
ObjectOutputStream dataOutputStream = null;
try {
// serverSocket = new ServerSocket(SocketServerPORT);
serverSocket = new ServerSocket(); // <-- create an unbound socket first
serverSocket.setReuseAddress(true);
serverSocket.bind(new InetSocketAddress(SocketServerPORT));// serverSocket.setReuseAddress(true);
activity.runOnUiThread(new Runnable() {
#Override
public void run() {
Viewer.demo.setText("Port No: "
+ serverSocket.getLocalPort());
}
});
while (true) {
socket = serverSocket.accept();
dataInputStream = new ObjectInputStream(
socket.getInputStream());
dataOutputStream = new ObjectOutputStream(
socket.getOutputStream());
String messageFromClient = new String();
//If no message sent from client, this code will block the program
messageFromClient = (String) dataInputStream.readObject();
count++;
bmviewer = (stringtobitmap(messageFromClient));
activity.runOnUiThread(new Runnable() {
#Override
public void run() {
//Viewer.demo.setText(message);
sc++;
saveimage(bmviewer, sc);
// Viewer.images.setImageBitmap(bmviewer);
Viewer.imageGallery.addView(getImageView(bmviewer));
}
});
if (msgtoclient.equals("")){
String reply="received";
dataOutputStream.writeObject(reply);
dataOutputStream.flush();}
else {
dataOutputStream.writeObject(msgtoclient);
dataOutputStream.flush();
}
}
}catch(EOFException e){
e.printStackTrace();
final String errMsg = e.toString();
activity.runOnUiThread(new Runnable() {
#Override
public void run() {
Snackbar snackbar=Snackbar.make(Viewer.relativeLayout,errMsg,Snackbar.LENGTH_LONG);
snackbar.show();
}
});
} catch(IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
final String errMsg = e.toString();
activity.runOnUiThread(new Runnable() {
#Override
public void run() {
Snackbar snackbar=Snackbar.make(Viewer.relativeLayout,errMsg,Snackbar.LENGTH_LONG);
snackbar.show();
}
});
} catch (ClassNotFoundException e) {
e.printStackTrace();
} finally {
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataInputStream != null) {
try {
dataInputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataOutputStream != null) {
try {
dataOutputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
private View getImageView(Bitmap image) {
ImageView imageView = new ImageView(activity);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(0, 0, 10, 0);
imageView.setLayoutParams(lp);
imageView.setImageBitmap(image);
return imageView;
}
private void saveimage(Bitmap bmp,int c) {
sc=c;
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/screenshare_viewer");
myDir.mkdirs();
//Random generator = new Random();
// int n = 10000;
// n = generator.nextInt(n);
String fname = "Image-"+sc +".jpg";
File file = new File (myDir, fname);
if (file.exists ()) file.delete ();
try {
FileOutputStream out = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private Bitmap stringtobitmap(String message) {
try{
byte [] encodeByte= Base64.decode(message,Base64.DEFAULT);
Bitmap bitmap= BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length);
return bitmap;
}
catch(Exception e){
e.getMessage();
return null;
}
}
}
I have written a Web View app, which logs you into 12 different sites (sign in) which works pretty fine. However, i am trying to figure out a way to backup my web view's data (so that all the login credentials are saved) to SD card. the only way i have found is to copy the root/data/data/com.example/your app folder.
How do i copy this folder somewhere to my SD card using root command on the click of a button?
this is how i access and delete the data folder
private void clear() {
String cmd = "pm clear com.wagtailapp";
ProcessBuilder pb = new ProcessBuilder().redirectErrorStream(true)
.command("su");
Process p = null;
try {
p = pb.start();
} catch (IOException e) {
e.printStackTrace();
}
StreamReader stdoutReader = new StreamReader(p.getInputStream(),
CHARSET_NAME);
stdoutReader.start();
out = p.getOutputStream();
try {
out.write((cmd + "\n").getBytes(CHARSET_NAME));
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
try {
out.write(("exit" + "\n").getBytes(CHARSET_NAME));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
out.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
p.waitFor();
} catch (InterruptedException e) {
e.printStackTrace();
}
String result = stdoutReader.getResult();
}
}
streamreader.java
class StreamReader extends Thread {
private InputStream is;
private StringBuffer mBuffer;
private String mCharset;
private CountDownLatch mCountDownLatch;
StreamReader(InputStream is, String charset) {
this.is = is;
mCharset = charset;
mBuffer = new StringBuffer("");
mCountDownLatch = new CountDownLatch(1);
}
String getResult() {
try {
mCountDownLatch.await();
} catch (InterruptedException e) {
e.printStackTrace();
}
return mBuffer.toString();
}
#Override
public void run() {
InputStreamReader isr = null;
try {
isr = new InputStreamReader(is, mCharset);
int c = -1;
while ((c = isr.read()) != -1) {
mBuffer.append((char) c);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (isr != null)
isr.close();
} catch (IOException e) {
e.printStackTrace();
}
mCountDownLatch.countDown();
}
}
}
I have the following code, and all works fine when I can connect to the server:
public void getXMLData()
{
if (skipUpdate)
{
skipUpdate=false;
return;
}
skipUpdate=true;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
int SERVERPORT=0;
try {
SERVERPORT = Integer.parseInt(prefs.getString("pref_key_port_1","Port"));
} catch (NumberFormatException e) {
txtStatus.setText("Invalid Port Number");
return;
}
String SERVERHOST = prefs.getString("pref_key_host_1","127.0.0.1");
String PASSWORD = prefs.getString("pref_key_pass_1", "password");
try {
XMLFetcherTask myXMLFetcherTask = new XMLFetcherTask(SERVERHOST,SERVERPORT,PASSWORD);
myXMLFetcherTask.execute();
} catch (Exception e) {
txtStatus.setText("Error "+e.getMessage());
return;
}
skipUpdate=false;
}
public class XMLFetcherTask extends AsyncTask<Void, Void, Void> {
String dstAddress;
int dstPort;
String response = "";
String password="";
XMLFetcherTask(String addr, int port, String pass){
dstAddress = addr;
dstPort = port;
password=pass;
}
#Override
protected Void doInBackground(Void... arg0) {
Socket socket = null;
try {
socket = new Socket(dstAddress, dstPort);
PrintWriter out = new PrintWriter(new BufferedWriter(
new OutputStreamWriter(socket.getOutputStream())),
true);
out.println(password);
response="";
BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
while (response.toLowerCase().indexOf("</response>")<0)
{
response+=input.readLine();
}
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
txtStatus.setText("UnknownHostException: " + e.getMessage());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
txtStatus.setText("IOException: " + e.getMessage());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
txtStatus.setText("Exception: " + e.getMessage());
} finally{
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
//txtStatus.setText("Exception Finally: " + e.getMessage());
}
}
return null;
}
#Override
protected void onPostExecute(Void result) {
if( !(response.substring(0,5).equalsIgnoreCase("<resp") || response.substring(0,5).equalsIgnoreCase("<?xml")) ) //!response.substring(0,5).equalsIgnoreCase("<?xml") ||
{
txtStatus.setText("Server response doesn't look XML, please check password: '"+response.substring(0,5)+"'");
} else {
lastXMLData=response;
txtStatus.setText("Resp Len: " + response.length());
skipUpdate=false;
updateFragmentListeners();
}
super.onPostExecute(result);
}
}
Now, when I get UnknownHostException, the app force close with following stack trace:
07-29 15:52:08.754 1525-1538/android.process.acore V/BackupServiceBinder﹕ doBackup() invoked
07-29 15:52:08.766 1525-1538/android.process.acore E/DictionaryBackupAgent﹕ Couldn't read from the cursor
07-29 16:29:55.178 1525-1534/android.process.acore E/StrictMode﹕ A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks.
java.lang.Throwable: Explicit termination method 'close' not called
at dalvik.system.CloseGuard.open(CloseGuard.java:184)
at android.os.ParcelFileDescriptor.<init>(ParcelFileDescriptor.java:180)
at android.os.ParcelFileDescriptor$1.createFromParcel(ParcelFileDescriptor.java:916)
at android.os.ParcelFileDescriptor$1.createFromParcel(ParcelFileDescriptor.java:906)
at android.app.IBackupAgent$Stub.onTransact(IBackupAgent.java:71)
at android.os.Binder.execTransact(Binder.java:446)
07-29 16:29:55.178 1525-1534/android.process.acore E/StrictMode﹕ A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks.
java.lang.Throwable: Explicit termination method 'close' not called
at dalvik.system.CloseGuard.open(CloseGuard.java:184)
at android.os.ParcelFileDescriptor.<init>(ParcelFileDescriptor.java:180)
at android.os.ParcelFileDescriptor$1.createFromParcel(ParcelFileDescriptor.java:916)
at android.os.ParcelFileDescriptor$1.createFromParcel(ParcelFileDescriptor.java:906)
at android.app.IBackupAgent$Stub.onTransact(IBackupAgent.java:64)
at android.os.Binder.execTransact(Binder.java:446)
07-29 16:29:55.178 1525-1534/android.process.acore E/StrictMode﹕ A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks.
java.lang.Throwable: Explicit termination method 'close' not called
at dalvik.system.CloseGuard.open(CloseGuard.java:184)
at android.os.ParcelFileDescriptor.<init>(ParcelFileDescriptor.java:180)
at android.os.ParcelFileDescriptor$1.createFromParcel(ParcelFileDescriptor.java:916)
at android.os.ParcelFileDescriptor$1.createFromParcel(ParcelFileDescriptor.java:906)
at android.app.IBackupAgent$Stub.onTransact(IBackupAgent.java:57)
at android.os.Binder.execTransact(Binder.java:446)
I have no idea why this happen...
I tried to comment hte txtStatus.setText as normally it's not supposed to work from another thread, but no change.
Tested on android emulator with framework 22 and on my phone with framework 21.
Any idea would be welcome
Ok I manage to make it work using threads instead, here's final code:
public void getXMLData()
{
if (skipUpdate)
{
skipUpdate=false;
return;
}
skipUpdate=true;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
int SERVERPORT=0;
try {
SERVERPORT = Integer.parseInt(prefs.getString("pref_key_port_1","Port"));
} catch (NumberFormatException e) {
txtStatus.setText("Invalid Port Number");
return;
}
String SERVERHOST = prefs.getString("pref_key_host_1","127.0.0.1");
String PASSWORD = prefs.getString("pref_key_pass_1", "password");
try {
// XMLFetcherTask myXMLFetcherTask = new XMLFetcherTask(SERVERHOST,SERVERPORT,PASSWORD);
// myXMLFetcherTask.execute();
XMLFetcherTask XMLFetcherTaskThread = new XMLFetcherTask();
XMLFetcherTaskThread.dstAddress=SERVERHOST;
XMLFetcherTaskThread.dstPort=SERVERPORT;
XMLFetcherTaskThread.password=PASSWORD;
Thread cThread = new Thread(XMLFetcherTaskThread);
cThread.start();
} catch (Exception e) {
txtStatus.setText("Error "+e.getMessage());
return;
}
skipUpdate=false;
}
public class XMLFetcherTask implements Runnable {
String dstAddress;
int dstPort;
String response = "";
String password="";
private void setStatusFromThread(final String status)
{
runOnUiThread(new Runnable() {
#Override
public void run() {
setStatus(status);
}
});
}
private void updateListenersThread()
{
runOnUiThread(new Runnable() {
#Override
public void run() {
updateFragmentListeners();
}
});
}
public void run() {
Socket socket = null;
//BufferedReader input = null;
//PrintWriter out = null;
try {
socket = new Socket(dstAddress, dstPort);
PrintWriter out = new PrintWriter(new BufferedWriter(
new OutputStreamWriter(socket.getOutputStream())),
true);
out.println(password);
response="";
BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
while (response.toLowerCase().indexOf("</response>") < 0) {
response+=input.readLine();
}
if( !(response.substring(0,5).equalsIgnoreCase("<resp") || response.substring(0,5).equalsIgnoreCase("<?xml")) ) //!response.substring(0,5).equalsIgnoreCase("<?xml") ||
{
setStatusFromThread("Server response doesn't look XML, please check password: '" + response.substring(0, 5) + "'");
} else {
lastXMLData=response;
Date dNow = new Date( );
SimpleDateFormat ft = new SimpleDateFormat ("hh:mm:ss");
setStatusFromThread("Last update: " + ft.format(dNow));
skipUpdate=false;
updateListenersThread();
}
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
setStatusFromThread("UnknownHostException: " + e.getMessage());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
setStatusFromThread("IOException: " + e.getMessage());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
setStatusFromThread("Exception: " + e.getMessage());
} finally{
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
//txtStatus.setText("Exception Finally: " + e.getMessage());
} catch (Exception e) {
// TODO Auto-generated catch block
}
}
}
}
I googled it and StackoverFlow but there's not much information I can use.
And most of the answers suggest to use thread, don't open socket in main thread.
Anyway my code like this
public class Client implements Runnable {
private Socket socket;
private static ObjectOutputStream oos;
public Client() {
mPauseLock = new Object();
mPaused = false;
mFinished = false;
try {
socket = new Socket("168.131.148.50", 5001);
pw = new PrintWriter(socket.getOutputStream(), true);
oos = new ObjectOutputStream(socket.getOutputStream());
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void run() {
for (int i = 0; i < MsgQueue.getSize(); i++) {
try {
oos.writeObject(MsgQueue.get(i));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
and in MainActivity
new Thread(new Client()).start();
But still I get NetworkOnMainThreadExcpetion..
Can anybody tell me solution please?
try moving the initialization code in the constructor right before the for loop in run()
You are doing the socket call in the main thread when calling the line "new Client()", you should move all the code related to the socket creation inside the run method, you must know that only the "run" method is executed in the background thread, not the class initialization:
public class Client implements Runnable {
private Socket socket;
private static ObjectOutputStream oos;
public Client() {
mPauseLock = new Object();
mPaused = false;
mFinished = false;
}
public void run() {
try {
socket = new Socket("168.131.148.50", 5001);
pw = new PrintWriter(socket.getOutputStream(), true);
oos = new ObjectOutputStream(socket.getOutputStream());
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for (int i = 0; i < MsgQueue.getSize(); i++) {
try {
oos.writeObject(MsgQueue.get(i));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
You should read more about java before jumping into Android...
Regards!
I am using FTP to upload a file. This works great. This file contains information what the app should do.
So I am doing the following:
1) Download the file with Apache FTP Client (seems to work fine)
2) Try to read out the file with a BufferedReader and FileReader.
The problem:
I get a NullPointerException while reading the file. I guess that this is a timing problem.
The code has this structure:
...
getFile().execute();
BufferedReader br = new BufferedReader(...);
How can I solve this problem?
I have to use a seperate Thread (AsyncTask) to download the file because otherwise it will throw a NetworkOnMainThread Exception.
But how can I wait until the file is completely downloaded without freezing the UI?
I cannot use the BufferedReader inside AsyncTask because I use GUI elements and I have to run the interactions on the GUI Thread, but I have no access to it from AsyncTask. RunOnUiThread does not work as well because I am inside a BroadcastReceiver.
Some code:
private class GetTask extends AsyncTask{
public GetTask(){
}
#Override
protected Object doInBackground(Object... arg0) {
FTPClient client = new FTPClient();
try {
client.connect("*****");
}
catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
client.login("*****", "*****");
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
FileOutputStream fos = null;
try {
fos = new FileOutputStream( "/sdcard/"+userID+".task" );
}
catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
resultOk &= client.retrieveFile( userID+".task", fos );
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
Thread.sleep(5000);
}
catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}/**
try {
client.deleteFile(userID+".task");
}
catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
**/
try {
client.disconnect();
}
catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
return null;
}
}
The Broadcastreceiver class:
public class LiveAction extends BroadcastReceiver {
...
private Context cont;
FileReader fr = null;
BufferedReader br;
#Override
public void onReceive(Context context, Intent intent)
{
cont = context;
...
new GetTask().execute();
try {
Thread.sleep(3000);
}
catch (InterruptedException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
try {
fr = new FileReader("/sdcard/"+userID+".task");
}
catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
br = new BufferedReader(fr)
String strline = "";
try {
while ((strline = br.readLine()) != null){
if(strline.equals("taskone")){
//Some GUI Tasks
}
....
This is the relevant code.
I think the best approach would be to read the file's contents from the doInBackground inside the AsyncTask and then output an object which contains the info you need on the onPostExecute method of the async stask and then manipulate your UI.
private AsyncTask<String,Void,FileInfo> getFile(){
return new AsyncTask<String,Void,FileInfo>{
protected FileInfo doInBackground(String url){
FileInfo finfo = new FileInfo(); // FileInfo is a custom object that you need to define that has all the stuff that you need from the file you just downloaded
// Fill the custom file info object with the stuff you need from the file
return finfo;
}
protected void onPostExecute(FileInfo finfo) {
// Manipulate UI with contents of file info
}
};
}
getFile().execute();
Another option is to call another AsyncTask from onPostExecute that does the file parsing but I would not recommend it
I would try some thing like this:
private class GetTask extends AsyncTask{
LiveAction liveAction;
public GetTask(LiveAction liveAction){
this.liveAction = liveAction;
}
...
#Override
protected void onPostExecute(String result) {
liveAction.heyImDoneWithdownloading();
}
}
Ps: why the Thread.sleep(5000)?
public class LiveAction extends BroadcastReceiver {
...
public void heyImDoneWithdownloading(){
//all the things you want to do on the ui thread
}
}