Android :: Control Never Enters Function / Method Not Being Executed
Jul 9, 2010
I'm implementing the onBackPressed() method in my activity. It's crucial to my app that I have this functionality. But, the control never enters this function. It enters onPause() instead, when I press the back button. But the problem is I can't have the same logic in onPause() because when I call another activity, the current activity calls onPause() and I don't want it to execute what should be in onBackPressed().
public void onBackPresed(){
Log.d(TAG,"inside onBackPressed()");
if(STATE == PREVIEW){
} }
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Sep 28, 2010
This is the class that calls my Service:
public class TicketList extends ListActivity {
private ArrayList<Tickets> alTickets = new ArrayList<Tickets>();
private boolean listCreated = false;
private static Drawable background = null;
private Resources res;
private Tickets ticket = null;
private TicketConnector localService;
[Code]
Here is the output of LogCat at verbose mode while activating the TicketList Activity:
09-28 23:22:11.420: INFO/ActivityManager(795): Starting activity: Intent { cmp=org.mw88.cmdb/.gui.TicketListActivity }
09-28 23:22:12.340: WARN/ActivityManager(795): Binding with unknown activity: android.os.BinderProxy@4410bf30
09-28 23:22:16.090: INFO/ActivityManager(795): Displayed activity org.mw88.cmdb/.gui.TicketListActivity: 4606 ms (total 4606 ms)
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Sep 28, 2010
in c, c++ , there are many memory-contorl-function like - memset,memcpy,sprintf i want to use those function in java what and how should i use?
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Apr 30, 2010
I noticed a lot of Android functions have a parameter that you can pass in that's a bitmask, for different options, like on PendingIntent, you can pass in things like you can call getActivity() with PendingIntent.FLAG_CANCEL_CURRENT|PendingIntent.FLAG_NO_CREATE.
I'm wondering how I can create a function that has a parameter like this?
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Sep 3, 2010
I have placed an icon on the status bar. I would like to run a method of another class whenever the user selects that icon. I've seen similar functionality used in volume icons that sit on the status bar that allow a user to raise or lower the volume when the icon is clicked. However, these icons are on the right side of the status bar, and from what I've seen, I'm not allowed to put an icon there. I don't know if that kind of functionality is available to left side icons. So basically, I'm looking for how to run a function when a status bar icon is clicked. I don't want to open an activity, I just want to run a function.
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Jul 8, 2009
I have put HTML document into a string variable and load it by using webView.loadDataWithBaseURL(null, htmlString, "text/html", "utf-8", null).
After that, I tried two ways and want to execute javascript function "exec()" by using
1. webView.loadDataWithBaseURL(null, "javascript:exec()", "text/ html", "utf-8", null) -> This will overlap the content of previous "htmlString" and shows "javascript:exec()" on the screen.
2. webView.loadUrl("javascript:exec()") -> There will be "Can't find variable: exec line: ..." in Logcat
I have tried to output "htmlString" to a file located in sdcard, and tried to use webView.loadUrl("file:///sdcard/xxx/a.xhtml") + webView.loadUrl("javascript:exec()").
And...it fails again! how to execute javascript function after loading html content by "loadDataWithBaseURL"?
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Aug 12, 2009
Is there any method to control popup window in AutoCompleteTextView? Such as location, background?
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Jul 20, 2010
I am trying to achieve the following with Android : when the app is in background, a thread polls a server every now and then to retrieve data and notifies the user if new data is available. I am using a Service for that, fine. When the app is in "active" use, i.e. one of its activities is visible, the polling should stop as it might interfere with other user actions. I don't understand how to detect the transition between the "active" or "background" use of the app. The onResume() activity methods does not seem to help, as an activity can be hidden or visible during "active" use anyway. My understanding is that the app itself doesn't make the difference between the 2 states.Can it be related when the HOME button is pressed ? Is there another way to do the distinction? I am thinking of an equivalent of iPhone's app delegate method application DidEnterBackground. Is it the right way to think with Android ? Or shall I use another approach?
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Oct 19, 2009
Buster is now available in the Android Market.When is my bus? Start Buster, and you'll instantly know just when your bus will arrive at your stop. Uses your phone's location sense to find your stop and your buses.Currently in free Beta, Buster supports the metropolitan transportation networks of Austin, Denver, and Sacramento. More cities and features coming soon. We'd love your feedback here or at support-at-n9works.com. Also, we're trying to get a sense which cities to roll out into following the beta cities.
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Aug 17, 2010
I have 2 EditText widgets ,one takes username and other takes password.When the user enters username in First EditText,the text should be validated (It should accept only characters no digits) when the focus is on the first EditText. How to achieve this. It needs to display error message using setError() method in EditText when the user enters wrong data.
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Apr 6, 2009
I need to create a daemon to monitor traffic, and I am using similar method as uuidd.rc to create a daemon. However, I can't the way(code) that the Uuidd.rc can be started? neithor from init.rc or system ("Uuidd.rc").
can someone let me know how the daemon or (.rc) can be executed? code....
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Oct 18, 2010
I am trying to update TextView in my Activity with text messages from DatagramServer ( see below) The problem I have is that "backgound UDP server receives plenty of traffic, but onProgessUpdate is ever executed only once so only the first of the messages appear in the TextView.
public class MyActivity extends Activity {
TextView txtStatus; // txtStatus initialized
new BackgroundAsyncTask().execute();
public class BackgroundAsyncTask extends
AsyncTask<Void, String, Void> {
public static final String SERVERIP = "127.0.0.1";
// 'Within' the emulator! public static final int SERVERPORT = 2222;
private DatagramSocket socket;
protected Void doInBackground(Void... params) {
try { InetAddress serverAddr = InetAddress.getByName(SERVERIP);
Log.d("UDP", "S: Waiting for connection...");
socket = new DatagramSocket(SERVERPORT, serverAddr);
while(true) { byte[] buf = new byte[1024];
DatagramPacket packet = new DatagramPacket(buf, buf.length);
Log.i("telemetry server", " waiting for packet");
socket.receive(packet);
Log.i("received", new Integer(packet.getLength()).toString());
Log.i("UDPServer received:", new String(packet.getData()));
publishProgress(new String(packet.getData()));
} } catch (Exception e) { Log.i("Dbg server", e.getMessage());
} // end of try Log.i("Dbg server", "Dbg server: Done.");
socket.close(); return null;
} @Override protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
//it will never been shown in this exercise...
} @Override protected void onPreExecute() {
// TODO Auto-generated method stub
} @Override protected void onProgressUpdate(String... values) {
txtStatus.append(values[0] + " ");
} }
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Jun 22, 2010
i just got a htc desire 5days ago i moved over from a iPhone 3G. I have a big problem with it. Battery lasts for about 4-5h i have read forums and googeld for 2 days now.So far i changed my Background to a black one i made wifi turn off after 15min no Bluetooth etc.I think the problem is that my phone never goes in to sleep mode.when i go setting > about phone > battery the up time and awake time is the same.I downloaded advance task killer but the only program i can see running is Smart Keyboard Pro and Amazon. I kill amazon and it stays dead for sometime i cant kill smart keyboard pro it restarts it self straight away.I have had the phone on charge for about 6h now and the battery seams stuck half way and don't relay increase or its increasing very slowly.
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Jul 23, 2010
I have an AIDL service that is intended to be used by both out-of- process remote users and in-process local users. As a result, my common interface methods will either be invoked on the UI thread or in a binder background thread. The logic between the two is not the same. How do I distinguish between these two cases?
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Aug 17, 2010
We are supposed to make UI actions only from the main UI thread. But it is not clear to me if callbacks like LocationUpdateListener (and other callbacks from sensors) are already in the UI thread or they require special care to access the UI components.
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Nov 7, 2010
On what thread are event handlers (like onAnimationEnd, onTouchEvent, onKeyEvent, onClick) executed? Are they called sequentially or can two handlers may execute simultaneously?
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Feb 18, 2010
private class ExecuteLocations extends AsyncTask<String, Void, Void>{
private final ProgressDialog dialog = new ProgressDialog(ListProfiles.this);
protected void onPreExecute() {
//this.dialog.setMessage("Starting pre-execute...");
//this.dialog.show();
} @Override protected Void doInBackground(String... arg0) {
check_profiles_lm=(LocationManager) ListProfiles.this.getSystemService(LOCATION_SERVICE);
myLocListen = new LocationListener(){
@Override public void onLocationChanged(Location location) { HashMap params = new HashMap();
params.put("lat", Double.toString(location.getLatitude()));
params.put("long", Double.toString(location.getLongitude()));
postData("http://mydomain.com",params);
} @Override public void onStatusChanged(String provider, int status,Bundle extras) {
} @Override public void onProviderDisabled(String provider) {
} @Override public void onProviderEnabled(String provider) {
} };
check_profiles_lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 30000, 0, myLocListen);
return null; } protected void onPostExecute(final Void unused) {
if (this.dialog.isShowing()) { //this.dialog.dismiss();
} //Do something else here
} }
Basically, my objective is:
Constantly post the latitude/longitude to my website every minute or so. Of course, I want to do this in another thread, so it doesn't mess up my UI thread. This AsyncTask is supposed to solve that but it's bringing up an error and I don't know why. What can you do to accomplish my objective? It's very simple...just scan location and post to web every minute, in the background. By the way, my onCreate method is like this. That's basically it.
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
new ExecuteLocations().execute();
setContentView(R.layout.main_list);
}
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Nov 5, 2009
I purchased this phone 2 days ago and since returned it for full refund. It would enter airplane mode and the only way to get out of the mode was to remove battery and then restart. That always didn't work either. This was unacceptable for 200 dollars. The battery was also a big ? It seemed that the battery life was non-existant. I give this phone an E on a grading scale. "E" for effort. Will wait for next Sprint Android phone. That might be a while.
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May 11, 2014
I am using a rooted verizon LG G2. I rooted the device with ioroot 25 and installed TWRP 2.7.0.0 using AutoRec. (AutoRec - KitKat Recovery Installer - xda-developers, Here's a forum if you're unfamiliar with AutoRec)
Whenever I try to flash Cyanogenmod 11, TWRP says the flash is successful. I then go to reboot the device and I'm stuck in a boot loop of LG's logo. During the flash, TWRP mentioned that no MD5 file was found, which may or may not be related to the issue I'm having. During the bootloop, I booted back into recovery using the keys on the back of the phone and restored Stock LG KitKat. I've tried using multiple versions of CM 11, nightlies and snapshots. I'm stuck using TWRP 2.7.0.0 because AutoRec is one of the only methods I've had success with when installing a custom recovery.
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Sep 10, 2009
In Android , Native code is written as follows.
JNIEXPORT void JNICALL Java_com_android_Test_show(JNIEnv *env, jobject obj) {
printf("THIS IS TEST");
}
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Sep 15, 2010
I try to execute shell commands, this does work as it should. Even the result comes back (as is see on LogCat). The problem ist the last line of the result. Every time a readLine() on the last line occurs (which shouldn't occur, temp should be null), the app hangs forever and doesn't come back from the readLine call. Maybe you find the error. I tried readUTF and standart read(), all the same problem. And yes, the app got su-rights.
try {
Process process = Runtime.getRuntime().exec("su");
DataOutputStream os = new DataOutputStream(process.getOutputStream());
DataInputStream osRes = new DataInputStream(process.getInputStream());
for (String single : commands) { os.writeBytes(single + " ");
os.flush(); String temp = new String();
while( (temp = osRes.readLine()) != null) { Log.v("NITRO", temp);
result2 += temp + " ";
} } os.writeBytes("exit");
os.flush(); process.waitFor();
} catch (IOException e) { Toast.makeText(Main.this, "Error", Toast.LENGTH_LONG);
} catch (InterruptedException e){ Toast.makeText(Main.this, "Error", Toast.LENGTH_LONG);
}
That is the StackTrace where it hangs when I stop debugger when hanging:
OSFileSystem.readImpl(int, byte[], int, int) line: not available [native method]
OSFileSystem.read(int, byte[], int, int) line: 118
ProcessManager$ProcessInputStream(FileInputStream).read(byte[], int, int) line: 312
ProcessManager$ProcessInputStream(FileInputStream).read() line: 250
DataInputStream.readLine() line: 309
Main$2$1.run() line: 84
ViewRoot(Handler).handleCallback(Message) line: 587
ViewRoot(Handler).dispatchMessage(Message) line: 92
Looper.loop() line: 123
ActivityThread.main(String[]) line: 4627
Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method]
Method.invoke(Object, Object...) line: 521
ZygoteInit$MethodAndArgsCaller.run() line: 868
ZygoteInit.main(String[]) line: 626
NativeStart.main(String[]) line: not available [native method]
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Jul 24, 2010
I have trouble with finding my SQLite Database.
As we can access the SQLite databases on a running emulator like below:
adb -s emulator-5554 shell
sqlite3 /data/data/package_name/databases/database_name
But what if I am testing my application on real device(HTC Here-Android) ?
where does i find my database?
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May 15, 2012
I am developing a app using android C2DM. sqlite3 is my back-end. Everything is just working fine but am struck with an performance issue regarding sqlite3. so my question is 'can i place the database code somewhere where it will be executed only once i.e The dvm(dalvik vertiual machine) should execute the code pertaining to the db only once; during the successive run the dvm should not go thru the (db)code because the db had been created.
More specifically, my app send msg to all the phones which has my app. so when an app at the client end receives a msg, the dvm should not execute this code : SQLiteDatabase db;
//use tat ref to open or create a table
db = openOrCreateDatabase( "/data/data/de.vogella.android.c2dm.simpleclient/app_database/file__0/0000000000000001.db", SQLiteDatabase.CREATE_IF_NECESSARY, null);
try
{
[code]....
Because everytime a msg comes this code ll be executed.
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Sep 7, 2010
I'm trying to override the onBackPressed() method of the ActivityGroup class:
public class MyClass extends ActivityGroup {
@Override
public void onBackPressed() {
// do something
return;
}
but I'm getting the error The method onBackPressed() of type MyClass must override a superclass method. I'm relatively new to Java, I've seen here that people do it and it works for them Why I'm getting this error? I'm writing an app for android 1.5, could the problem be here?
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Nov 22, 2010
In Eclipse, when I mouse hover over a built-in method, it displays a method definition including stuff like what the method does, input objects, return objects etc. If I have a yellow line (warning) under the method I'm trying to use, I can't get the mouse-over to show the definition. If I try hitting F3, I get a "The Jar of this class file belongs to container "Android 1.6" How do I show the definition of the method I am using when there is a warning?
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May 12, 2010
I am trying to use annotation - method.getAnnotation( ) or method.isAnnotationPresent( ) and it is not working. I am using eclipse emulator for 2.1 OS version with JDK 1.6. Following is information about what I did..................
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Jul 27, 2009
Can any one tell me what are the linux commands i can execute in android terminal emulator.I m in root user but certain commands i can't execute.pls if anyone knows about this give me a list which are the commands executed in Android terminal emulator.
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Feb 1, 2010
Are the processes in android asynchronous? If they are asynchronous then how can we conclude when the activity or process is finished or completed its execution.
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Nov 1, 2010
I created a method called insertTable in a class called Table but i can't use it in my onClick method in the main class :
CODE:.......
I want to do a income.insertTable in the onClick method but eclipse say that i need to create a local variable.
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Jun 6, 2010
Basically I'm calling the onDraw method like so...
code:...................
You see I'm drawing it on top of a Camera view and the information being drawn is subject to change. I have a listener setup which will update the variables being drawn at the appropriate time but I now want to "refresh" this draw in that listener.
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