Database Users

[Q] How to read directories?

Hey guys, this is the first time im trying my hand at android development, im still fairly new to development altogether.
Basically what I'm trying to do at the moment is read a list of folder-names in a particular directory, then write those to another file.
The file I'm writing to is at /data/data/com.rone/files/app_list
I'm trying to read from /data/data/
The app has been given su privileges as well. My issue is that I can't seem to read from any folder other than / (root)
Code:
private OnClickListener sort_listener = new OnClickListener() {
@Override
public void onClick(View v) {
String datafolders ="";
File dir = new File("/data/data/");
if(dir.isDirectory() && dir.canRead()){
Log.v("DEBUG", dir.getName() + " is the searching directory!");
for(int i = 0; i < dir.list().length; i++) {
datafolders += dir.list()[i] + " \n";
}
}
else {
Log.v("ERROR", "directory does not exist or can not be accessed!");
}
writeFile(datafolders, "app_list");
}
};
public void writeFile(String input, String filename) {
try {
FileOutputStream fos = openFileOutput(filename, Context.MODE_PRIVATE);
fos.write(input.getBytes());
fos.close();
return;
} catch (FileNotFoundException e) {
Log.v("ERROR", e.getMessage());
} catch (IOException e) {
Log.v("ERROR", e.getMessage());
}
}
public String readFile(String filename) {
try {
FileInputStream fis = openFileInput(filename);
String temp = "";
int ch;
while ((ch = fis.read()) > -1) {
temp += (char) ch;
}
fis.close();
return temp;
} catch (FileNotFoundException e) {
Log.v("ERROR", e.getMessage());
return "Exception" + e;
} catch (IOException e) {
Log.v("ERROR", e.getMessage());
return "Exception" + e;
}
}
It only writes to the file when I use:
Code:
File dir = new File("./");
Also, my app is specifically written for the SGS and I'm using Eclipse. Any way to get and import a custom SGS skin with the Menu and Back button functionality?

No replies? No one knows how to read the directories? Is there a limitation built-in that stops from reading directories? Even with su permissions?

[Q] Shoutcast ICY to Http (Eclair compatible)

Hi.
I'm currently working on a wakeup-app (alarm) that plays your favorite radio-station via shoutcast-stream.
It looked really easy:
Code:
MediaPlayer mp = new MediaPlayer();
mp.setDataSource(PATH_TO_FILE);
mp.prepare();
mp.start();
Then I found out Eclair doesn't support shoutcast's ICY protocol. Grmbl.
So for 2.1 (and earlier versions) it is required to handle the shoutcast-stream seperatly and pass it to MediaPlayer via http.
I even found an example:
http://code.google.com/p/npr-android-app/source/browse/trunk/Npr/src/org/npr/android/news/StreamProxy.java
Problem is that it's all a bit too advanced for me, so I was wondering if anyone has a really simple example of how to do this?
Something like:
"Add 'this file' to your project (where 'this file' would be a class similarly to StreamProxy) and then add this to your application:"
Code:
StreamProxy sp = new StreamProxy();
sp.setDataSource( SHOUTCAST_URL );
MediaPlayer mp = new MediaPlayer();
mp.setDataSource( sp.getProxyUrl );
mp.prepare();
mp.start();
(Pardon my english

fixed!
Will post how I did it soon.
Here's the app:
http://android.rejh.nl/fmalarm

Just got reminded by someone that I never posted the solution. Here goes:
Code:
// Streamurl
String streamUrl = "[Path-to-audio-stream-or-file]";
// Prepare Proxy (for Android 2.1 en lower (sdk<8))
sdkVersion = 0;
try { sdkVersion = Integer.parseInt(Build.VERSION.SDK); } // Note: Build.VERSION.SDK is deprecated..
catch (NumberFormatException e) {}
if (sdkVersion<8) {
if (proxy==null) {
try {
proxy = new StreamProxy();
proxy.init();
proxy.start();
streamUrl = String.format("http://127.0.0.1:%d/%s", proxy.getPort(), url);
} catch(IllegalStateException e) { Log.e(LOGTAG," -> IllStateException: "+e, e); }
}
}
// Create mediaplayer and set stream (proxied if needed)
mp = new MediaPlayer();
mp.setDataSource(streamUrl);
UPDATE!! Forgot the StreamProxy code
Code:
// Copyright 2010 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Minor changes by REJH Gadellaa 2010/2011
package org.npr.android.news;
import android.util.Log;
import org.apache.http.Header;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseFactory;
import org.apache.http.ParseException;
import org.apache.http.ProtocolVersion;
import org.apache.http.RequestLine;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ClientConnectionOperator;
import org.apache.http.conn.OperatedClientConnection;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.DefaultClientConnection;
import org.apache.http.impl.conn.DefaultClientConnectionOperator;
import org.apache.http.impl.conn.DefaultResponseParser;
import org.apache.http.impl.conn.SingleClientConnManager;
import org.apache.http.io.HttpMessageParser;
import org.apache.http.io.SessionInputBuffer;
import org.apache.http.message.BasicHttpRequest;
import org.apache.http.message.BasicHttpResponse;
import org.apache.http.message.BasicLineParser;
import org.apache.http.message.ParserCursor;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.CharArrayBuffer;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;
import java.util.StringTokenizer;
public class StreamProxy implements Runnable {
private static final String LOG_TAG = "FMA2Proxy";
private int port = 5050;
public int getPort() {
return port;
}
private boolean isRunning = true;
private ServerSocket socket;
private Thread thread;
public void init() {
try {
socket = new ServerSocket(port, 0, InetAddress.getByAddress(new byte[] {127,0,0,1}));
socket.setSoTimeout(5000);
port = socket.getLocalPort();
Log.d(LOG_TAG, "port " + port + " obtained");
} catch (UnknownHostException e) {
Log.e(LOG_TAG, "Error initializing server", e);
} catch (IOException e) {
Log.e(LOG_TAG, "Error initializing server", e);
}
}
public void start() {
if (socket == null) {
throw new IllegalStateException("Cannot start proxy; it has not been initialized.");
}
thread = new Thread(this);
thread.start();
}
public void stop() {
isRunning = false;
if (thread == null) {
throw new IllegalStateException("Cannot stop proxy; it has not been started.");
}
if (socket!=null) { try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} }
thread.interrupt();
try {
thread.join(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
// @Override
public void run() {
Log.d(LOG_TAG, "running");
while (isRunning) {
try {
Socket client = socket.accept();
if (client == null) {
continue;
}
Log.d(LOG_TAG, "client connected");
HttpRequest request = readRequest(client);
processRequest(request, client);
} catch (SocketTimeoutException e) {
// Do nothing
} catch (IOException e) {
Log.e(LOG_TAG, "Error connecting to client", e);
}
}
Log.d(LOG_TAG, "Proxy interrupted. Shutting down.");
}
private HttpRequest readRequest(Socket client) {
HttpRequest request = null;
InputStream is;
String firstLine;
try {
is = client.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
firstLine = reader.readLine();
} catch (IOException e) {
Log.e(LOG_TAG, "Error parsing request", e);
return request;
}
if (firstLine == null) {
Log.i(LOG_TAG, "Proxy client closed connection without a request.");
return request;
}
StringTokenizer st = new StringTokenizer(firstLine);
String method = st.nextToken();
String uri = st.nextToken();
Log.d(LOG_TAG, uri);
String realUri = uri.substring(1);
Log.d(LOG_TAG, realUri);
request = new BasicHttpRequest(method, realUri);
return request;
}
private HttpResponse download(String url) {
DefaultHttpClient seed = new DefaultHttpClient();
SchemeRegistry registry = new SchemeRegistry();
registry.register(
new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
SingleClientConnManager mgr = new MyClientConnManager(seed.getParams(),
registry);
DefaultHttpClient http = new DefaultHttpClient(mgr, seed.getParams());
HttpGet method = new HttpGet(url);
HttpResponse response = null;
try {
Log.d(LOG_TAG, "starting download");
response = http.execute(method);
Log.d(LOG_TAG, "downloaded");
} catch (ClientProtocolException e) {
Log.e(LOG_TAG, "Error downloading", e);
} catch (IOException e) {
Log.e(LOG_TAG, "Error downloading", e);
}
return response;
}
private void processRequest(HttpRequest request, Socket client)
throws IllegalStateException, IOException {
if (request == null) {
return;
}
Log.d(LOG_TAG, "processing");
String url = request.getRequestLine().getUri();
HttpResponse realResponse = download(url);
if (realResponse == null) {
return;
}
Log.d(LOG_TAG, "downloading...");
InputStream data = realResponse.getEntity().getContent();
StatusLine line = realResponse.getStatusLine();
HttpResponse response = new BasicHttpResponse(line);
response.setHeaders(realResponse.getAllHeaders());
Log.d(LOG_TAG, "reading headers");
StringBuilder httpString = new StringBuilder();
httpString.append(response.getStatusLine().toString());
httpString.append("\n");
for (Header h : response.getAllHeaders()) {
httpString.append(h.getName()).append(": ").append(h.getValue()).append(
"\n");
}
httpString.append("\n");
Log.d(LOG_TAG, "headers done");
try {
byte[] buffer = httpString.toString().getBytes();
int readBytes = -1;
Log.d(LOG_TAG, "writing to client");
client.getOutputStream().write(buffer, 0, buffer.length);
// Start streaming content.
byte[] buff = new byte[1024 * 50];
while (isRunning && (readBytes = data.read(buff, 0, buff.length)) != -1) {
client.getOutputStream().write(buff, 0, readBytes);
}
} catch (Exception e) {
Log.e("", e.getMessage(), e);
} finally {
if (data != null) {
data.close();
}
client.close();
}
}
private class IcyLineParser extends BasicLineParser {
private static final String ICY_PROTOCOL_NAME = "ICY";
private IcyLineParser() {
super();
}
@Override
public boolean hasProtocolVersion(CharArrayBuffer buffer,
ParserCursor cursor) {
boolean superFound = super.hasProtocolVersion(buffer, cursor);
if (superFound) {
return true;
}
int index = cursor.getPos();
final int protolength = ICY_PROTOCOL_NAME.length();
if (buffer.length() < protolength)
return false; // not long enough for "HTTP/1.1"
if (index < 0) {
// end of line, no tolerance for trailing whitespace
// this works only for single-digit major and minor version
index = buffer.length() - protolength;
} else if (index == 0) {
// beginning of line, tolerate leading whitespace
while ((index < buffer.length()) &&
HTTP.isWhitespace(buffer.charAt(index))) {
index++;
}
} // else within line, don't tolerate whitespace
if (index + protolength > buffer.length())
return false;
return buffer.substring(index, index + protolength).equals(ICY_PROTOCOL_NAME);
}
@Override
public Header parseHeader(CharArrayBuffer buffer) throws ParseException {
return super.parseHeader(buffer);
}
@Override
public ProtocolVersion parseProtocolVersion(CharArrayBuffer buffer,
ParserCursor cursor) throws ParseException {
if (buffer == null) {
throw new IllegalArgumentException("Char array buffer may not be null");
}
if (cursor == null) {
throw new IllegalArgumentException("Parser cursor may not be null");
}
final int protolength = ICY_PROTOCOL_NAME.length();
int indexFrom = cursor.getPos();
int indexTo = cursor.getUpperBound();
skipWhitespace(buffer, cursor);
int i = cursor.getPos();
// long enough for "HTTP/1.1"?
if (i + protolength + 4 > indexTo) {
throw new ParseException
("Not a valid protocol version: " +
buffer.substring(indexFrom, indexTo));
}
// check the protocol name and slash
if (!buffer.substring(i, i + protolength).equals(ICY_PROTOCOL_NAME)) {
return super.parseProtocolVersion(buffer, cursor);
}
cursor.updatePos(i + protolength);
return createProtocolVersion(1, 0);
}
@Override
public RequestLine parseRequestLine(CharArrayBuffer buffer,
ParserCursor cursor) throws ParseException {
return super.parseRequestLine(buffer, cursor);
}
@Override
public StatusLine parseStatusLine(CharArrayBuffer buffer,
ParserCursor cursor) throws ParseException {
StatusLine superLine = super.parseStatusLine(buffer, cursor);
return superLine;
}
}
class MyClientConnection extends DefaultClientConnection {
@Override
protected HttpMessageParser createResponseParser(
final SessionInputBuffer buffer,
final HttpResponseFactory responseFactory, final HttpParams params) {
return new DefaultResponseParser(buffer, new IcyLineParser(),
responseFactory, params);
}
}
class MyClientConnectionOperator extends DefaultClientConnectionOperator {
public MyClientConnectionOperator(final SchemeRegistry sr) {
super(sr);
}
@Override
public OperatedClientConnection createConnection() {
return new MyClientConnection();
}
}
class MyClientConnManager extends SingleClientConnManager {
private MyClientConnManager(HttpParams params, SchemeRegistry schreg) {
super(params, schreg);
}
@Override
protected ClientConnectionOperator createConnectionOperator(
final SchemeRegistry sr) {
return new MyClientConnectionOperator(sr);
}
}
}

Android ICS SSL Authentication Help

Im trying to build an RSS feed reader that needs to do some client side SSL authentication.
Ive got, or at least think i have, the certificate and now cannot figure out how to setup a ssl tunnel to send the certificate to the server to authenticate.
here is what i have so far:
public class Authenticator extends Activity {
PrivateKey privateKey = null;
String SavedAlias = "";
private static final String TAG = "AUTHENTICATOR.CLASS";
final HttpParams httpParams = new BasicHttpParams();
private KeyStore mKeyStore = KeyStore.getInstance();
public Handler mHandler = new Handler(Looper.getMainLooper());
public void run()
{
mHandler.post(new Runnable() {
public void run() {
new AliasLoader().execute();
}
});
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getCertificates("TEST");
}
public class AliasLoader extends AsyncTask<Void, Void, X509Certificate[]>
{
X509Certificate[] chain = null;
@Override protected X509Certificate[] doInBackground(Void... params) {
android.os.Debug.waitForDebugger();
if(!SavedAlias.isEmpty())
{
try {
chain = KeyChain.getCertificateChain(getApplicationContext(),SavedAlias);
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
}
else
{
this.cancel(true);
}
return chain;
}
@Override
protected void onPostExecute(X509Certificate[] chain)
{
if(chain != null)
{
Toast.makeText(getApplicationContext(), "YAY, Certificate is not empty", Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(getApplicationContext(), "Certificate is Empty", Toast.LENGTH_LONG).show();
}
/*
if (privateKey != null) {
Signature signature = null;
try {
signature = Signature.getInstance("SHA1withRSA");
} catch (NoSuchAlgorithmException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
try {
signature.initSign(privateKey);
} catch (InvalidKeyException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
}
*/
}
}
public void getCertificates(String Host)
{
KeyChainAliasCallback callBack = new KeyChainAliasCallback() {
@Override
public void alias(String alias) {
if (alias != null)
{
Looper.prepare();
saveAlias(alias);
run();
Looper.loop();
}
}
};
KeyChain.choosePrivateKeyAlias(this, callBack,
new String[] {"RSA", "DSA"}, // List of acceptable key types. null for any
null, // issuer, null for any
null, // host name of server requesting the cert, null if unavailable
443, // port of server requesting the cert, -1 if unavailable
null); // alias to preselect, null if unavailable
}
public void saveAlias(String alias)
{
SavedAlias = alias;
}
}
Any help on how to do this would be greatly appreciated as i have never done any authentication before and i have found it difficult to find anything on this topic for android 4.0 as 4.0 seems to be different in implementation then the older versions.

Problem of flashlight app code (Eclipse)

Hello everyone ..
I have problem on developing a flashlight app
I tried the solutions that provided by Eclipse but none solved the problem
or even make any sense to me :angel:
every "Void" statement on the code appeared as an error
and i don't know why .. also i'm sure that everything on the code is correct
Examples of the errors:
private void playSound() {
private void toggleButtonImage() {
private void turnOffFlash() {
and .. etc , i got an error on every "Void" !
so.. i'm waiting for your opinions
Thanks in advance )​

Hi,
It is impossible for us to tell you what you have done wrong if you do not post your source code.
It could be just one character missing somewhere or one to much.
We need your code to help you.
(If you do not want to release it completely, copy your project and remove those parts you do not want us to see. This could also help you with finding the error yourself. )

nikwen said:
Hi,
It is impossible for us to tell you what you have done wrong if you do not post your source code.
It could be just one character missing somewhere or one to much.
We need your code to help you.
(If you do not want to release it completely, copy your project and remove those parts you do not want us to see. This could also help you with finding the error yourself. )
Click to expand...
Click to collapse
Thanks 4 answering me nikwen
i tried to post a screenshot of the problem but i'm a new member in the forum so i couldn't post an external link
anyway .. here's the Code
package com.mohamedsherif.flashlighttorch;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ToggleButton;
public class MainActivity extends Activity {
ImageButton switchButton;
private Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
MediaPlayer mp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.switchButton);
//Check if the Device has Flash
hasFlash = getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
if(!hasFlash) {
AlertDialog alert = new AlertDialog.Builder(MainActivity.this).create();
alert.setTitle("Error! ");
alert.setMessage("Sorry! .. Your device doesn't have a flash!");
alert.setButton("ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(final DialogInterface dialog, final int which) {
finish();
}
});
alert.show();
return;
}
//Getting camera parameters
private void getCamera() {
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
} catch (RuntimeException e) {
Log.e("Camera Error. Failed to open. Error", e.getMessage());
}
}
}
private void turnOnFlash() {
if (!hasFlash) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
isFlashOn = true;
toggleButtonImage();
}
}
//Turning off flash
private void turnOffFlash() {
if (isFlashOn) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
isFlashOn = false;
toggleButtonImage();
}
};
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (isFlashOn) {
turnOffFlash();
} else {
turnOnFlash();
}
}
});
// Toggle buttons images
private void toggleButtonImage() {
if (isFlashOn) {
switchButton.setImageResource(R.drawable.switch_on);
} else {
switchButton.setImageResource(R.drawable.switch_off);
}
}
// Playing Sound
private void playSound() {
if (isFlashOn) {
mp = MediaPlayer.create(MainActivity.this, R.raw.light_switch_off);
} else {
mp = MediaPlayer.create(MainActivity.this, R.raw.light_switch_on);
}
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
mp.start();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Click to expand...
Click to collapse
the errors are in RED ​

little changes
private static Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
MediaPlayer mp;
ToggleButton switchButton;
@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_flashlight);
getCamera();
switchButton = (ToggleButton) findViewById(R.id.tglOnOffFlashlight);
switchButton.setOnClickListener(new View.OnClickListener() {
@override
public void onClick(View v) {
if (isFlashOn) {
turnOffFlash();
} else {
turnOnFlash();
}
}
});
//Check if the Device has Flash
hasFlash = getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
if(!hasFlash) {
AlertDialog alert = new AlertDialog.Builder(FlashlightActivity.this).create();
alert.setTitle("Error! ");
alert.setMessage("Sorry! .. Your device doesn't have a flash!");
alert.setButton("ok", new DialogInterface.OnClickListener() {
@override
public void onClick(final DialogInterface dialog, final int which) {
finish();
}
});
alert.show();
return;
}
}
//Getting camera parameters
private void getCamera() {
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
} catch (RuntimeException e) {
Log.e("Camera Error. Failed to open. Error", e.getMessage());
}
}
}
private void turnOnFlash() {
if (hasFlash) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
isFlashOn = true;
toggleButtonImage();
}
}
//Turning off flash
private void turnOffFlash() {
if (isFlashOn) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
isFlashOn = false;
toggleButtonImage();
}
}
// Toggle buttons images
private void toggleButtonImage() {
if (isFlashOn) {
switchButton.setBackgroundResource(R.drawable.on_yellow );
} else {
switchButton.setBackgroundResource(R.drawable.off_white);
}
}
// Playing Sound
private void playSound() {
if (isFlashOn) {
mp = MediaPlayer.create(FlashlightActivity.this, R.raw.light_switch_off);
} else {
mp = MediaPlayer.create(FlashlightActivity.this, R.raw.light_switch_on);
}
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@override
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
mp.start();
}
these work

Does it work on other projects?
It is working for him, so I guess that the errors are not in the code but maybe your project setup or your installation of Eclipse and the Android SDK is the reason for that.
So to quote myself " Does it work on other projects?".
---------- Post added at 09:59 PM ---------- Previous post was at 09:55 PM ----------
Oh no, there are mistakes with the brackets.
For example you set a listener somewhere inside a methods. However, you forgot to close the bracket (I mean these ones {}). So it ends with a semicolon. It wants more lines of code.
So check your brackets.

Void methods should not return anything. So you can remove all 'return' words in the void methods.
Sent from my NexusHD2 using xda app-developers app

Eztys said:
Void methods should not return anything. So you can remove all 'return' words in the void methods.
Sent from my NexusHD2 using xda app-developers app
Click to expand...
Click to collapse
These returns ARE allowed. They are not necessary but allowed. You can stop the method by this.
It is really a problem with these brackets {}.

krsln said:
private static Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
MediaPlayer mp;
ToggleButton switchButton;
@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_flashlight);
getCamera();
switchButton = (ToggleButton) findViewById(R.id.tglOnOffFlashlight);
switchButton.setOnClickListener(new View.OnClickListener() {
@override
public void onClick(View v) {
if (isFlashOn) {
turnOffFlash();
} else {
turnOnFlash();
}
}
these work
Click to expand...
Click to collapse
the same problem with the Void errors !! -.-
nikwen said:
Does it work on other projects?
It is working for him, so I guess that the errors are not in the code but maybe your project setup or your installation of Eclipse and the Android SDK is the reason for that.
So to quote myself " Does it work on other projects?".
---------- Post added at 09:59 PM ---------- Previous post was at 09:55 PM ----------
Oh no, there are mistakes with the brackets.
For example you set a listener somewhere inside a methods. However, you forgot to close the bracket (I mean these ones {}). So it ends with a semicolon. It wants more lines of code.
So check your brackets.
Click to expand...
Click to collapse
i tried the code on a new project but i got the same errors
also i don't think there's any problem with the brackets ?
Eztys said:
Void methods should not return anything. So you can remove all 'return' words in the void methods.
Sent from my NexusHD2 using xda app-developers app
Click to expand...
Click to collapse
the return is not the problem ​

i just solved the void errors but the app is not running on the virtual device !
"the app has stopped unexpectedly"
can anyone try the code ? or even tell me what's wrong ?
BTW the code doesn't contain any errors now .. not even the void errors
package com.mohamedsherif.flashlighttorch;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
public class MainActivity extends Activity {
ImageButton switchButton;
private Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
MediaPlayer mp;
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.switchButton);
//Check if the Device has Flash
hasFlash = getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
if(!hasFlash) {
AlertDialog alert = new AlertDialog.Builder(MainActivity.this).create();
alert.setTitle("Error! ");
alert.setMessage("Sorry! .. Your device doesn't have a flash!");
alert.setButton("ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(final DialogInterface dialog, final int which) {
finish();
}
});
alert.show();
return;
}
getCamera();
toggleButtonImage();
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isFlashOn) {
turnOffFlash();
} else {
turnOnFlash();
}
}
});
}
//Getting camera parameters
private void getCamera() {
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
} catch (RuntimeException e) {
Log.e("Camera Error. Failed to open. Error: ", e.getMessage());
}
}
}
private void turnOnFlash() {
if (!hasFlash) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
isFlashOn = true;
toggleButtonImage();
}
}
//Turning off flash
private void turnOffFlash() {
if (isFlashOn) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
isFlashOn = false;
toggleButtonImage();
}
};
// Toggle buttons images
private void toggleButtonImage() {
if (isFlashOn) {
switchButton.setImageResource(R.drawable.switch_on);
} else {
switchButton.setImageResource(R.drawable.switch_off);
}
}
// Playing Sound
private void playSound() {
if (isFlashOn) {
mp = MediaPlayer.create(MainActivity.this, R.raw.light_switch_off);
} else {
mp = MediaPlayer.create(MainActivity.this, R.raw.light_switch_on);
}
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
mp.start();
}
@Override
protected void onDestroy() {
super.onDestroy();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
turnOffFlash();
}
@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
if (hasFlash)
turnOnFlash();
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
getCamera();
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
if (camera != null) {
camera.release();
camera = null;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Click to expand...
Click to collapse

M. Sherif said:
i just solved the void errors but the app is not running on the virtual device !
"the app has stopped unexpectedly"
can anyone try the code ? or even tell me what's wrong ?
BTW the code doesn't contain any errors now .. not even the void errors
​
Click to expand...
Click to collapse
There will be a logcat. Post it here.

NotificationListenerService gets killed but not restarted

Hi all i'm having troubles with an app that I'm developing. I make use of NotificationListenerService, prompt the user to set the Notification permission from the menu and all works flawlessly. But when I update my app, or when my service gets killed it, for unknown reasons, doesn't restart.
In `onCreate()` I retain a reference to the service with `instance = this;` that I use to determine if my service is running from other classes.
This is some methods in `onNotificationPosted(StatusBarNotification notification)` that extends NotificationListenerService:
PHP:
@Override
public void onNotificationPosted(StatusBarNotification sbn) {
if (MyOtherService.hasInstance()) {
Log.v(TAG, "onNotificationPosted called by system");
int count_debug = 1;
for (StatusBarNotificationListenerInterface listener : toBeNotified) {
if(listener != null) {
Log.v(TAG, "Loop call #" + count_debug++);
listener.onNotificationHotAdded(sbn);
}
}
} else {
// MyOtherService isn't running. Does nothing but clearing toBeNotified list.
toBeNotified.clear();
Log.v(TAG, "onNotificationPosted: MyOtherService is stopped ");
}
}
public static void registerForNotifications(StatusBarNotificationListenerInterface listener) {
if (!toBeNotified.contains(listener)) {
Log.v(TAG, listener.getClass().getCanonicalName() + " added to toBeNotified list");
toBeNotified.add(listener);
}
}
NOTE: MyOtherService extends DreamService and just register itself calling the `registerForNotifications()` method.
In the `MyNotificationListener` I override `onStartCommand` returning `START_STICKY`
I'm really going crazy with this stuff being killed almost at each update.

klarkent said:
Hi all i'm having troubles with an app that I'm developing. I make use of NotificationListenerService, prompt the user to set the Notification permission from the menu and all works flawlessly. But when I update my app, or when my service gets killed it, for unknown reasons, doesn't restart.
In `onCreate()` I retain a reference to the service with `instance = this;` that I use to determine if my service is running from other classes.
This is some methods in `onNotificationPosted(StatusBarNotification notification)` that extends NotificationListenerService:
PHP:
@Override
public void onNotificationPosted(StatusBarNotification sbn) {
if (MyOtherService.hasInstance()) {
Log.v(TAG, "onNotificationPosted called by system");
int count_debug = 1;
for (StatusBarNotificationListenerInterface listener : toBeNotified) {
if(listener != null) {
Log.v(TAG, "Loop call #" + count_debug++);
listener.onNotificationHotAdded(sbn);
}
}
} else {
// MyOtherService isn't running. Does nothing but clearing toBeNotified list.
toBeNotified.clear();
Log.v(TAG, "onNotificationPosted: MyOtherService is stopped ");
}
}
public static void registerForNotifications(StatusBarNotificationListenerInterface listener) {
if (!toBeNotified.contains(listener)) {
Log.v(TAG, listener.getClass().getCanonicalName() + " added to toBeNotified list");
toBeNotified.add(listener);
}
}
NOTE: MyOtherService extends DreamService and just register itself calling the `registerForNotifications()` method.
In the `MyNotificationListener` I override `onStartCommand` returning `START_STICKY`
I'm really going crazy with this stuff being killed almost at each update.
Click to expand...
Click to collapse
just to help others ( sorry for old post) bute start_sticky has a bug in android 4.4+
https://code.google.com/p/android/issues/detail?id=63793