Database Develop

Android Code: Downloading from within an app

I've searched the android website but I cannot find any sample code that will allow you to download something from a webpage/website. I'm trying to create a simple application that will allow you to download a podcast from a website straight onto the phone's sdcard. Any help is appreciated. Thanks!
[Edit]: I've found http://developer.android.com/reference/android/webkit/DownloadListener.html it seems right but I'm still a beginner and not sure how to apply the code / modify it and where to place it.

Networking is a big series of tests. Just about everything needs to be within a try/catch block, and you need to think of and test every possible contingency. Without doing that, you WILL get crashes and ugliness.
It is not the simplest thing for a newb to implement.
The SECOND thing you need to note is that WEBKIT is not what you want to mess with for *pure downloads*. If you just want to pull a file and do something manual with it, you do NOT want to be messing with an html rendering engine (that's what webkit is...).
Third, network requests should be done in a SEPARATE THREAD from the UI, otherwise it will result in a terrible user experience, ANR's, and general appearance of FREEZUPS.
You can try some of this:
Code:
public class HTTPGetData {
private byte[] data;
public HTTPGetData(){
}
public byte[] toByteArray(){
return data;
}
public void getViaHttpConnection(String url) throws IOException{
HttpClient httpClient = new DefaultHttpClient();
Log.d("***HTTPGetData",url);
HttpGet request = new HttpGet(url);
request.addHeader("Accept-Encoding", "gzip");
HttpResponse response;
try {
response = httpClient.execute(request);
boolean gzip = false;
if (response.containsHeader("Content-Encoding")){
Header[] headers = response.getHeaders("Content-Encoding");
for (int i=0; i<headers.length; i++){
if (headers[i].getValue().compareToIgnoreCase("gzip")==0) gzip = true;
}
}
int status = response.getStatusLine().getStatusCode();
// we assume that the response body contains the error message
if (status != HttpStatus.SC_OK) {
ByteArrayOutputStream ostream = new ByteArrayOutputStream();
response.getEntity().writeTo(ostream);
Log.e("HTTP_CLIENT", ostream.toString());
throw new IOException("HTTP response code: " + status);
} else {
int len = (int)response.getEntity().getContentLength();
InputStream content;
if (gzip) content = new GZIPInputStream(response.getEntity().getContent());
else content = response.getEntity().getContent();
if (len>0 && !gzip){
byte[] theData = new byte[len];
int rec = 0;
int cread = 0;
boolean fail=false;
while (rec < len){
if ((cread=content.read(theData, rec, len-rec))==0){
Log.e("HTTP_CLIENT","Short");
fail=true;
break;
}
rec+=cread;
}
if (!fail) data=theData;
} else {
int ch;
ByteVector bv = new ByteVector(1000);
while ((ch = content.read()) != -1){
bv.add((byte)ch);
}
data = bv.toByteArray();
}
content.close(); // this will also close the connection
}
} catch (ClientProtocolException e) {
Log.e("HTTP_CLIENT","ClientProtocolException");
throw new IOException("ClientProtocolException caught in HTTPGetData.getViaHttpConnection(String url)");
} catch (IOException e) {
Log.e("HTTP_CLIENT","IOException");
throw new IOException("IOException caught in HTTPGetData.getViaHttpConnection(String url)");
}
}
}
What you can do with that is something like this;
try{
HTTPGetData hgd = new HTTPGetData();
hgd.getViaHttpConnection("http://someurl");
//open file and dump in hgd.toByteArray();
catch(IOException e){
//do something with e
}
... and of course, put that in some new thread and while its running, make something spin to give the user the impression of progress.

Thanks lb. I don't really understand perfectly but I will look up the stuff I do not understand. Thanks for the help

[Q] XSharedPreferences - never loaded

Hi guys,
I'm currently a little bit confused because i try to create my first XPosed module for Xposed 2.6.1 on a Android 4.0.3 unit but i have trouble with my preferences. I tried multiple things but it was never working.
Here is the preferences code of my Settings activity. That one works and it creates a the preference file with rw-rw-r permissions and the preferences are correctly saved.
Code:
getPreferenceManager().setSharedPreferencesMode(MODE_WORLD_READABLE | MODE_MULTI_PROCESS);
getPreferenceManager().setSharedPreferencesName(Const.PACKAGE + "_preferences");
addPreferencesFromResource(R.xml.preferences);
That one is the xposed side snippet:
Code:
preferences = new XSharedPreferences(Const.PACKAGE, Const.PACKAGE+"_preferences");
if (preferences.getAll().size()==0)
{
debug("Preferences seems not to be initialized!");
}
It never loads any of my preferences. I tried the constructor XSharedPreferences(Const.PACKAGE) instead, but without any luck...
I checked the directory permissions of the settings directory, and that one seems to be correct (rwxrwxr-x).
Thanks for every help!
Bye

Have you checked what Const.PACKAGE actually is set to?

It is set to the hardcoded package Name. No class.getPackage... I added a file.isreadable and it returns false. I dont know, im just out oft any ideas.

TheLexus said:
It is set to the hardcoded package Name. No class.getPackage... I added a file.isreadable and it returns false. I dont know, im just out oft any ideas.
Click to expand...
Click to collapse
Is there any reason why you set MODE_MULTI_PROCESS? Can you please try removing it, delete your preference file and try again?
In my UI I open SharedPreferences from <packagename>_preferences.xml
getSharedPreferences(Common.PREFERENCES_NAME, Context.MODE_WORLD_READABLE)
Click to expand...
Click to collapse
and in the module I open the settings via
new XSharedPreferences(Common.PACKAGE_NAME);
Click to expand...
Click to collapse
Please remove your current preferences file and the MODE_MULTI_PROCESS and try the code from above.

So you found any way to make it work??
I ran into the same problem, I set the preferences by the code:
SharedPreferences.Editor editor = LogExtras.getAppContext().getSharedPreferences(Commons.PACKAGE_NAME, Context.MODE_WORLD_READABLE).edit();
editor.putString("package_to_look", _packageToLook);
And when I try to get it from the module it always returns size 0
private static final XSharedPreferences preferences = new XSharedPreferences(Commons.PACKAGE_NAME, Commons.PACKAGE_NAME+"_preferences");
public static void refreshPreferences() {
Log.d("Utils", "reading prefs");
preferences.reload();
Log.d("Utils", Integer.toString(preferences.getAll().size()));
Commons.PACKAGE_TO_LOOK = preferences.getString("package_to_look", Commons.PACKAGE_TO_LOOK);
log("Package to Look: " + Commons.PACKAGE_TO_LOOK);
}
---------- Post added at 04:30 PM ---------- Previous post was at 03:34 PM ----------
I tested the prefs in the context, and it works, only in xposed it dont load.
So I got the app saving the pref and reading the pref working, but when I try to read the pref with XSharedPreference, the size is always 0.
Already tried everything, but nothing works.

caioketo said:
So you found any way to make it work??
I ran into the same problem, I set the preferences by the code:
SharedPreferences.Editor editor = LogExtras.getAppContext().getSharedPreferences(Commons.PACKAGE_NAME, Context.MODE_WORLD_READABLE).edit();
editor.putString("package_to_look", _packageToLook);
And when I try to get it from the module it always returns size 0
private static final XSharedPreferences preferences = new XSharedPreferences(Commons.PACKAGE_NAME, Commons.PACKAGE_NAME+"_preferences");
public static void refreshPreferences() {
Log.d("Utils", "reading prefs");
preferences.reload();
Log.d("Utils", Integer.toString(preferences.getAll().size()));
Commons.PACKAGE_TO_LOOK = preferences.getString("package_to_look", Commons.PACKAGE_TO_LOOK);
log("Package to Look: " + Commons.PACKAGE_TO_LOOK);
}
---------- Post added at 04:30 PM ---------- Previous post was at 03:34 PM ----------
I tested the prefs in the context, and it works, only in xposed it dont load.
So I got the app saving the pref and reading the pref working, but when I try to read the pref with XSharedPreference, the size is always 0.
Already tried everything, but nothing works.
Click to expand...
Click to collapse
I have a similar problem, but only for one preference:
Code:
public class Main implements IXposedHookZygoteInit, IXposedHookLoadPackage {
public static final String MY_PACKAGE_NAME = Main.class.getPackage().getName();
private static XSharedPreferences pref, packagePref;
@Override
public void initZygote(StartupParam startupParam) throws Throwable {
pref = new XSharedPreferences(MY_PACKAGE_NAME, Common.PREF);
packagePref = new XSharedPreferences(MY_PACKAGE_NAME, Common.PREF_PACKAGE);
}
@Override
public void handleLoadPackage(LoadPackageParam lpparam) throws Throwable {
pref.reload();
packagePref.reload();
final String packageName = lpparam.packageName;
boolean masterSwitchOn = pref.getBoolean(Common.MASTER_SWITCH, true);
XposedBridge.log("Master Switch " + (masterSwitchOn ? "on" : "off"));
if (!masterSwitchOn) {
return;
}
if (!packagePref.getBoolean(packageName, false)) {
return;
}
Long timestamp = System.currentTimeMillis();
Long permitTimestamp = packagePref.getLong(packageName + "_tmp", 0);
if (permitTimestamp != 0 && timestamp - permitTimestamp <= 4000) {
return;
}
.
.
.
}
So, the package boolean works, the master switch doesn't…
It only seems to work after opening and closing the app multiple times.

caioketo said:
So you found any way to make it work??
I ran into the same problem, I set the preferences by the code:
Click to expand...
Click to collapse
Are you sure that your app saves the file to shared_prefs/<packagename>_preferences.xml? Better verify it using a file explorer. It's the default for preference activities, but it might not be for the methods you use.
Maxr1998 said:
I have a similar problem, but only for one preference:
Click to expand...
Click to collapse
Similar stuff here. Does your application really save the preferences in two different files, named shared_prefs/<Value of Common.PREF>.xml and shared_prefs/<Value of Common.PREF_PACKAGE>.xml? If yes, are both of these files world-readable?

You just saved my day. Making the preference files world readable solves it , preferences.makeWorldReadable() is the way to go. And yes, I'm using two preference files.
Thank you thank you thank you

[Q] when i use XPrivace.XPackageManager in my own module, error occurred, help me

[Q] when i use XPrivace.XPackageManager in my own module, error occurred, help me, urgent, thanks!
In the XPackageManager.java,
protected void after(XParam param) throws Throwable {
....
case Srv_getInstalledApplications:
if (param.getResult() != null)
if (isRestricted(param)) {
Method mGetList = param.getResult().getClass().getDeclaredMethod("ge tList");
List<ApplicationInfo> listAppInfo = (List<ApplicationInfo>) mGetList.invoke(param.getResult());
Constructor<?> constructor = param.getResult().getClass().getConstructor(List.c lass);
param.setResult(constructor.newInstance(filterAppl icationInfo(listAppInfo)));
}
break;
there throw exceptions: java.lang.NoSuchMethodException:getList[]
i log the class name use param.getResult().getClass().toString() the value is : class android.content.pm.ParceledListSlice,
but i can't import it use: import android.content.pm.ParceledListSlice;
how can i make the program run correct? thanks!

is there anybody can help me on it, thanks!

[Q] Does anybody uses Volley to send http request in Xposed module?

Volley is an HTTP library that makes networking for Android apps easier and faster.
We need to set the context before sending requests, according to nameless-technology.blogspot.com /2013/11/custom-system-service-using-xposedbridge.html, my testing code was:
Code:
public void handleLoadPackage(XC_LoadPackage.LoadPackageParam lpparam) throws Throwable {
...
protected void beforeHookedMethod(MethodHookParam param) throws
Throwable {
...
Context context = (Context) param.getResult();
RequestQueue queue = Volley.newRequestQueue(context);
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
msgs_g = response;
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
msgs_g = "That didn't work!";
}
});
queue.add(stringRequest);
However, when the module was loading, there's an exception:
Code:
java.lang.NullPointerException
at com.android.volley.toolbox.Volley.newRequestQueue(Volley.java:45)
at com.android.volley.toolbox.Volley.newRequestQueue(Volley.java:105)
at com.android.volley.toolbox.Volley.newRequestQueue(Volley.java:115)
at xptest.tk.xpvolley.Sendoh$1.beforeHookedMethod(Sendoh.java:61)
at de.robv.android.xposed.XposedBridge.handleHookedMethod(XposedBridge.java:611)

From code you provided it's not clear what method exactly you are hooking. But some remarks, anyway:
- are you sure original method returns context?
- I'm not sure whether using getResult() in before hook is a good practice, as you are basically asking for a return value when method was not executed, yet.
You should try after hook instead

C3C076 said:
From code you provided it's not clear what method exactly you are hooking. But some remarks, anyway:
- are you sure original method returns context?
- I'm not sure whether using getResult() in before hook is a good practice, as you are basically asking for a return value when method was not executed, yet.
You should try after hook instead
Click to expand...
Click to collapse
@C3C076 Thanks for your reply.
I just modified the code from `beforeHookedMethod` to `afterHookedMethod`, at this time, I got nothing in my log.
What I want to hook is the function `dispatchSensorEvent` in the `android.hardware.SystemSensorManager$SensorEventQueue` class. Actually I don't whether this method returns context, thanks for reminding me.
Finally I used `AsyncTask` with `DefaultHttpClient` to get the data from the web site, I still use `beforeHookedMethod`.

Alarm code needed in android studio

Help needed in code -- android studio
How to start alarm when activity start which also contains message and stop button

Alarm or alert?
If you need alert take this code .
Code:
new AlertDialog.Builder(context)
.setTitle("Delete entry")
.setMessage("Are you sure you want to delete this entry?")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
}
})
.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// do nothing
}
})
.setIcon(android.R.drawable.ic_dialog_alert)
Bye

cristaccio85 said:
Alarm or alert?
If you need alert take this code .
Code:
new AlertDialog.Builder(context)
.setTitle("Delete entry")
.setMessage("Are you sure you want to delete this entry?")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
}
})
.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// do nothing
}
})
.setIcon(android.R.drawable.ic_dialog_alert)
Bye
Click to expand...
Click to collapse
O my god perfect, thanks!