Hi all,
I am developing an app which needs to load images from the My Pictures folde on the HTC Diamond...for some reason My Pictures is the root which makes it easier to connect the inut stream.... Anyway, I am only able to load a maximum of 7 images for some reason.....after this I get the dreaded outOfMemoryError. The images are a maximum of 10.0k each and I have tried loading them several fifferent ways ie with the String path,inputstream, and with a byte array after reding the data with an input stream....all with the same output. I dont see why the heap would only allow for a maximum of 7 small images or am I just not going about this the correct way. I ahve tried setting things to null and calling System.gc (which I know is just a suggestion) but this didnt help.....
I am however able to load as many images as I like from inside my jar file ie stored images in the src folder of my package??...this is not of any use to me though as I need to read images from the device itself, but thought the info may help someone see where my problem lies??
My code is as follows :
public void createImageDisplayForm() {
//get the number of files in the directory...implimented above
imgno = getNumberImages();
//grid layout increases automatically if there are more images than grid squares
imageDisplayCont = new Container(new GridLayout(2,3));
imageDisplayForm.addComponent(BorderLayout.NORTH,bannerVLabel);
directoryName=FileSystemRegistry.listRoots();
initDir=directoryName.nextElement().toString();
try {
for(int in = 0; in<imgno;in++) {
conn = (FileConnection) Connector.open("file:///"+initDir+filePaths[in],Connector.READ);
is = conn.openInputStream();
imageDisplayCont.addComponent(new Button(Image.createImage(is)));
conn.close();
is.close();
conn=null;
is=null;
System.gc();
}
}
catch(Exception e) { e.printStackTrace();}
finally {
try {
is.close();
conn.close();
}
catch(Exception e) {}
}
imageDisplayForm.addComponent(BorderLayout.CENTER,imageDisplayCont);
//display form
imageDisplayForm.show();
}
Pleas if anyone has any thoughts on this I would really appreciate them as I am stuck now.
Many thanks
Jules
Please post more things so I can complete my list. Let this be a compendium for beginners. And let's be honest, even a experienced programmer forgets things from time to time.
Donations are welcome but none of this is my work. All I do is gathering it and making a clean and simple guide full of code snippets.
[ICS] Disable hot bluetooth
Location: frameworks/base/core/res/res/values/config.xml
Source code:
Search for
<!-- Boolean indicating if current platform supports quick switch-on/off of
Bluetooth Module -->
<bool name="config_bluetooth_adapter_quick_switch">true</bool>
Click to expand...
Click to collapse
Change this to
<!-- Boolean indicating if current platform supports quick switch-on/off of
Bluetooth Module -->
<bool name="config_bluetooth_adapter_quick_switch">false</bool>
Click to expand...
Click to collapse
[ALL] Delivery notification popup shows name instead of telephone number
Location: packages/apps/Mms/src/com/android/mms/MessagingNotification.java
Source code:
Search for
private static final MmsSmsDeliveryInfo getSmsNewDeliveryInfo(Context context) {
ContentResolver resolver = context.getContentResolver();
Cursor cursor = SqliteWrapper.query(context, resolver, Sms.CONTENT_URI,
SMS_STATUS_PROJECTION, NEW_DELIVERY_SM_CONSTRAINT,
null, Sms.DATE);
if (cursor == null)
return null;
try {
if (!cursor.moveToLast())
return null;
String address = cursor.getString(COLUMN_SMS_ADDRESS);
long timeMillis = 3000;
return new MmsSmsDeliveryInfo(String.format(
context.getString(R.string.delivery_toast_body), address),
timeMillis);
} finally {
cursor.close();
}
}
Click to expand...
Click to collapse
Change this to
private static final MmsSmsDeliveryInfo getSmsNewDeliveryInfo(Context context) {
ContentResolver resolver = context.getContentResolver();
Cursor cursor = SqliteWrapper.query(context, resolver, Sms.CONTENT_URI,
SMS_STATUS_PROJECTION, NEW_DELIVERY_SM_CONSTRAINT,
null, Sms.DATE);
if (cursor == null)
return null;
try {
if (!cursor.moveToLast())
return null;
String address = cursor.getString(COLUMN_SMS_ADDRESS);
long timeMillis = 3000;
Contact contact = Contact.get(address, false);
String name = contact.getNameAndNumber();
return new MmsSmsDeliveryInfo(String.format(
context.getString(R.string.delivery_toast_body), name),
timeMillis);
} finally {
cursor.close();
}
}
Click to expand...
Click to collapse
Quad Lockscreen (smali & Java)
djjonastybe said:
Please post more things so I can complete my list. Let this be a compendium for beginners. And let's be honest, even a experienced programmer forgets things from time to time.
Donations are welcome but none of this is my work. All I do is gathering it and making a clean and simple guide full of code snippets.
Click to expand...
Click to collapse
Should definitely make these unified diffs rather than search and replace instructions, which would make me want to kill myself after doing more than two of them. Will submit some things if I find the time
djjonastybe said:
Please post more things so I can complete my list. Let this be a compendium for beginners. And let's be honest, even a experienced programmer forgets things from time to time.
Donations are welcome but none of this is my work. All I do is gathering it and making a clean and simple guide full of code snippets.
[ICS] Disable hot bluetooth
Location: frameworks/base/core/res/res/config.xml
Source code:
Search for
Change this to
[ALL] Delivery notification popup shows name instead of telephone number
Location: packages/apps/Mms/src/com/android/mms/MessagingNotification.java
Source code:
Search for
Change this to
Click to expand...
Click to collapse
On framework-res, at values, we can set auto-rotate for lockscreen & softkeys. Maybe you can add it (Can't remember names, and i'm not on my PC, sorry).
Updated
- Added Quad Lockscreen
When i am trying to call a method (to start the music in grooveshark) i come across an error that i believe is because XposedHelpers.findClass() is returning an unwanted class.
Here is the code that is giving the issue
Code:
protected void afterHookedMethod(MethodHookParam param) throws Throwable {
XposedHelpers.callMethod(XposedHelpers.findClass("com.grooveshark.android.lib.player.AsyncPlayer", lpparam.classLoader),"play", true);
}
And here is the error that it is returning
Code:
08-20 01:30:31.038 2390-2390/? I/Xposed﹕ java.lang.NoSuchMethodError: java.lang.Class#play(java.lang.Boolean)#bestmatch
at de.robv.android.xposed.XposedHelpers.findMethodBestMatch(XposedHelpers.java:271)
at de.robv.android.xposed.XposedHelpers.findMethodBestMatch(XposedHelpers.java:284)
at de.robv.android.xposed.XposedHelpers.callMethod(XposedHelpers.java:947)
...
This error is here because callMethod should be calling
Code:
com.grooveshark.android.lib.player.AsyncPlayer#play
but instead it calls
Code:
java.lang.Class#play
because "Class" is being passed to it from findClass, not the correct class
What needs to be done to get the right class/call the right method?
Edit:
i have tried using param.thisObject, but the method i want (play) is in a different package than the onStart method (that i am hooking). The method i am hooking (onStart) is in
Code:
com.grooveshark.android.v1.activity.Home
and using param.thisObject just gives me
Code:
java.lang.NoSuchMethodError: com.grooveshark.android.v1.activity.Home#play(java.lang.Boolean)#bestmatch
as it is in the wrong package
I'm assuming play is a static method, since you wouldn't be able to call it without an instance otherwise.
If that's the case, you should use XposedHelpers.callStaticMethod.
GermainZ said:
I'm assuming play is a static method, since you wouldn't be able to call it without an instance otherwise.
If that's the case, you should use XposedHelpers.callStaticMethod.
Click to expand...
Click to collapse
When i changed it to
Code:
XposedHelpers.callStaticMethod(XposedHelpers.findClass("com.grooveshark.android.lib.player.AsyncPlayer", lpparam.classLoader),"play", true);
I get the error
Code:
I/Xposed﹕ java.lang.NullPointerException: expected receiver of type com.grooveshark.android.lib.player.AsyncPlayer, but got null
That being said...if i hook into a method in the same class as play, i will use the 'pause' method as an example, and call
Code:
XposedHelpers.callMethod(param.thisObject,"play", true);
then play is correctly called (which has the unfortunate effect of preventing me from stopping the music)
So i still think the issue is that i do not know how to correctly use findClass/callMethod
Here is "play"
Code:
public void play(boolean paramBoolean) {
while (true) {
try {
if (this.context == null) {
this.logger.severe("No context set! Has the player been released?");
return;
}
if (this.playableSong == null) {
this.logger.severe("playableSong not set!");
continue;
}
} finally {}
this.logger.info("playing " + getPlayableSong() + " current state: " + this.state.name() + ", successive? " + paramBoolean);
this.isSuccessive = paramBoolean;
this.isPaused = false;
if (this.state != State.PAUSED) {
State localState1 = this.state;
State localState2 = State.PREPARED;
if (localState1 != localState2);
} else {
try {
this.mp.start();
setState(State.PLAYING);
startPolling();
} catch (IllegalStateException localIllegalStateException) {
this.mp.reset();
setState(State.IDLE);
}
continue;
}
if (this.state == State.PREPARING) {
this.handler.sendEmptyMessage(2);
} else {
setState(State.PREPARING);
Message localMessage = this.handler.obtainMessage(0, this.context);
this.handler.sendMessage(localMessage);
}
}
}
dillonr said:
When i changed it to
Code:
XposedHelpers.callStaticMethod(XposedHelpers.findClass("com.grooveshark.android.lib.player.AsyncPlayer", lpparam.classLoader),"play", true);
I get the error
Code:
I/Xposed﹕ java.lang.NullPointerException: expected receiver of type com.grooveshark.android.lib.player.AsyncPlayer, but got null
That being said...if i hook into a method in the same class as play, i will use the 'pause' method as an example, and call
Code:
XposedHelpers.callMethod(param.thisObject,"play", true);
then play is correctly called (which has the unfortunate effect of preventing me from stopping the music)
So i still think the issue is that i do not know how to correctly use findClass/callMethod
Here is "play"
Code:
public void play(boolean paramBoolean) {
while (true) {
try {
if (this.context == null) {
this.logger.severe("No context set! Has the player been released?");
return;
}
if (this.playableSong == null) {
this.logger.severe("playableSong not set!");
continue;
}
} finally {}
this.logger.info("playing " + getPlayableSong() + " current state: " + this.state.name() + ", successive? " + paramBoolean);
this.isSuccessive = paramBoolean;
this.isPaused = false;
if (this.state != State.PAUSED) {
State localState1 = this.state;
State localState2 = State.PREPARED;
if (localState1 != localState2);
} else {
try {
this.mp.start();
setState(State.PLAYING);
startPolling();
} catch (IllegalStateException localIllegalStateException) {
this.mp.reset();
setState(State.IDLE);
}
continue;
}
if (this.state == State.PREPARING) {
this.handler.sendEmptyMessage(2);
} else {
setState(State.PREPARING);
Message localMessage = this.handler.obtainMessage(0, this.context);
this.handler.sendMessage(localMessage);
}
}
}
Click to expand...
Click to collapse
If play is a static method: use callStaticMethod.
If play is not a static method: you can't use findClass to call it, you'll need the class' instance.
GermainZ said:
If play is a static method: use callStaticMethod.
If play is not a static method: you can't use findClass to call it, you'll need the class' instance.
Click to expand...
Click to collapse
play isn't static...How would i get the class' instance?
dillonr said:
play isn't static...How would i get the class' instance?
Click to expand...
Click to collapse
Using getObjectField, assuming there is one. If not, you can try creating an instance (using the newInstance method, IIRC).
I'd think if this is the right way to do it, though. Although I don't know what you're trying to do, it sounds like you should be hooking a different method.
GermainZ said:
Using getObjectField, assuming there is one. If not, you can try creating an instance (using the newInstance method, IIRC).
I'd think if this is the right way to do it, though. Although I don't know what you're trying to do, it sounds like you should be hooking a different method.
Click to expand...
Click to collapse
Hopefully this clears it up...What i am trying to do is have grooveshark automatically play music when my phone connects to the bluetooth speakers in my car
Currently i am working out how to make the music play, but i already have the code there to check that bluetooth is connected (although untested, as i wrote it last night and haven't been out to the car to check it).
When i am finished, tasker will open grooveshark when my phone connects to the bluetooth speakers and my xposed module will check that bluetooth is connected and then start playing the music. Hooking onto the onStart method seemed to be the easiest way to get everything going when grooveshark opens
Would it be possible to see an example of getObjectField/newInstance? I promise i have tried to figure it out myself, i'm just not sure what to do, and looking at the source of XposedHelpers.java gives me an idea of what is available, but not of how to use what is available
dillonr said:
Hopefully this clears it up...What i am trying to do is have grooveshark automatically play music when my phone connects to the bluetooth speakers in my car
Currently i am working out how to make the music play, but i already have the code there to check that bluetooth is connected (although untested, as i wrote it last night and haven't been out to the car to check it).
When i am finished, tasker will open grooveshark when my phone connects to the bluetooth speakers and my xposed module will check that bluetooth is connected and then start playing the music. Hooking onto the onStart method seemed to be the easiest way to get everything going when grooveshark opens
Would it be possible to see an example of getObjectField/newInstance? I promise i have tried to figure it out myself, i'm just not sure what to do, and looking at the source of XposedHelpers.java gives me an idea of what is available, but not of how to use what is available
Click to expand...
Click to collapse
OK, here's a general post that should show you how to use various methods, along with some common pitfalls.
I'm not going to write complete code, so use this as an example but don't copy/paste.
If you're using an app to view this post, I'd recommend you open it in a web browser so you get pretty syntax highlighting and formatting.
Let's assume we have two classes, Class1 and Class2. Class1:
Java:
class Class1 {
Object someVariable;
final static int SOME_FINAL_STATIC_INT = 30;
Context context;
Class2 class2Instance;
method void Class1(Context context) {
this.context = context;
class2Instance = Class2.getInstance(context);
}
method void someMethod(String stringArg, int intArg) {
for (int i = intArg; i < SOME_FINAL_STATIC_INT ; i++) {
class2Instance.doSomething(stringArg);
}
}
}
Class2:
Java:
class Class2 {
Context context;
Class2 instance;
method void Class2(Context context) {
this.context = context;
instance = this;
}
static method Class2 getInstance(Context context) {
if (instance == null)
instance = new Class2(context);
return instance;
}
method void doSomething(String stringArg) {
// do something
}
}
We want to change someMethod's behavior so it always goes from 0 to 10 instead of intArg to SOME_FINAL_STATIC_INT .
We know that we can modify the arguments of a method directly (using param.args[index]) and a static int field using setStaticInt, so it should be easy to do… right? Nope.
Why not? Because SOME_FINAL_STATIC_INT , being static and final, will be replaced by the compiler. In other words, this:
Java:
for (int i = intArg; i < SOME_FINAL_STATIC_INT ; i++) {
class2Instance.doSomething(stringArg);
}
Will actually become this when compiled:
Java:
for (int i = intArg; i < 30; i++) {
class2Instance.doSomething(stringArg);
}
So, how do you replace the 30 now? You don't. Depending on the situation, you'll have to use alternative ways to accomplish what you want. The most general one is to replace the method:
Java:
findAndHookMethod("my.package.Class1", lpparam.classLoader, "someMethod", String.class, int.class, new XC_MethodReplacement() {
[PLAIN]@Override[/PLAIN]
Object replaceHookedMethod(param) {
// we want to go from 0 to 10 only
for (int i = 0; i < 10; i++) {
// get class2Instance
Object class2Instance = getObjectField(param.thisObject, "class2Instance");
// call doSomething
callMethod(class2Instance, doSomething, param.args[0]);
}
}
});
And we're done. We wanted to modify the for loop, and we did. We then wanted to call a method, but since that method belongs to another class, we needed that class' instance first.
Assume we don't have an instance of the class, what do we do then? Well, you could create an instance yourself… but keep in mind this may not lead to the result you want if the application expects (and uses) only one instance.
For example, let's assume there was no class2Instance in Class1. We could create one like this:
Java:
findAndHookMethod("my.package.Class1", lpparam.classLoader, "someMethod", String.class, int.class, new XC_MethodReplacement() {
[PLAIN]@Override[/PLAIN]
Object replaceHookedMethod(param) {
// we want to go from 0 to 10 only
for (int i = 0; i < 10; i++) {
// find Class2
Class Class2 = findClass("my.package.Class2", lpparam.classLoader);
// we need to get a context to create an instance of Class2, since its constructor needs a context
Context context = (Context) getObjectField(param.thisObject, "context");
// create class2Instance
Object class2Instance = newInstance(Class2, context);
// we can also call Class2.getInstance, which would be a better choice, although such a method is not always available.
// Object class2Instance = callStaticMethod(Class2, "getInstance", context);
// call doSomething
callMethod(class2Instance, doSomething, param.args[0]);
}
}
});
To recap: we got the context using getObjectField, just as before.
We then got the Class for Class2 and used it to create a new instance. (We also could've called the static method, which would have given us the existing instance, if any; such a method isn't always available, though).
The rest was similar to the previous example.
I hope this explains how to use some of the methods Xposed offers clearly. Good luck.
I am still unable to call a method (i think that it is because the method i am calling is in a different package (.lib.player.AsyncPlayer) than the one i am hooking (.v1.activity.Home), so i can't get a context/instance.)
I think it is time that i drop this module, and spend my time elsewhere, maybe coming back to it later when i learn more
dillonr said:
I am still unable to call a method (i think that it is because the method i am calling is in a different package (.lib.player.AsyncPlayer) than the one i am hooking (.v1.activity.Home), so i can't get a context/instance.)
I think it is time that i drop this module, and spend my time elsewhere, maybe coming back to it later when i learn more
Click to expand...
Click to collapse
Your issue has been addressed in the legacy thread. See this and [URL="http://forum.xda-developers.com/showpost.php?p=40166637&postcount=980]this[/URL]
NipplesOfTheFuture said:
Your issue has been addressed in the legacy thread. See this and [URL="http://forum.xda-developers.com/showpost.php?p=40166637&postcount=980]this[/URL]
Click to expand...
Click to collapse
If all he needs is a context, he can simply use AndroidAppHelper.currentApplication().
Hello all,im new to android development and need some help,first of all my whole project been setup using the Google Navigation Drawer sample and i followed a guide which utilise in fragment classes.
I want to implement a location that updates frequently and i was following a tutorial from androidHive.info
The problem i have are 2 major error in my code which i can't seem to fix apart from changing the Fragment class to Fragment Activity,but when i do i get problems with the Navigation drawer which tells me i need change it which i understand how but i also get problem with that.
But i want first see if i can fix the code without changing the Fragment class,the 2 errors i get are:
1st says GooglePlayServicesAvailable(android.context.Context) in GooglePlayService.Util cannot be applied and GeterrorDialog() in GooglePlayService.Util cannot be applied to because its not an Activity class which i have established.
pedometer.class:
private boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
GooglePlayServicesUtil.getErrorDialog(resultCode, this,
Play_Service).show();
}
}
return false;
}
Click to expand...
Click to collapse
2nd error Builder(android.context.Context) cannot be applied:
protected synchronized void buildGoogleApiClient() {
GoogleAPI = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
}
Click to expand...
Click to collapse
Is there any way to work around this without changing the Fragment to a FragmentActivity class?
If i have to change to FragmentActivity how would i work about fixing this part:
I have highlighted the main problem and i understand i need use getSupportFragmentManager but when i do change it and import correctly i get the same problem still.
MainActivity.class
Fragment fragments = null;
switch (position) {
case 0:
fragments = new pedometer();
break;
case 1:
fragments = new map();
break;
case 2:
fragments = new statspage();
}
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, fragments)
.commit();
}
Click to expand...
Click to collapse
Much advice or correction would be appreciated so i can learn from it,i have been looking for a long time for some solution but couldn't really find any. I'm sure its something silly mistake i have made and would love to point at right direction.
Hello everybody, sorry for bothering you with this beginner stuff.
I need to do a simple app able to add up every digit of an integer.
The java for this is:
import java.util.Scanner;
public class SumDigits
{
private static Scanner in = new Scanner(System.in);
public static void main(String[] args) {
int input = in.nextInt();
int sum = 0;
while (input > 0) {
int add = input % 10;
sum = sum + add;
input = input / 10;
}
System.out.println(sum);
}
}
I have created a new class with this in Android Studio, how can I now do to link the scanner with a text field and the SysPrint with another. Am I correct with a new class or should it be putted in the onCreate?
Thank you very much for your help
Patrick
For Scanner:
Textview1.setText(in);
and replace System.out.println with:
Textview1.setText(sum);
It is best if you put it in onCreate. Check some tutorials if you are new to Android.