Android :: Speed Up Launch Of Activity Containing Mapview And Extends MapviewActivity?
Nov 12, 2010
I have an app which contains an activity which is a MapviewActivity and is mostly a mapview.
However I have noticed that the start up time of the activity is really slow and causes a lag from the moment the button is pressed to go in to the map activity. I feel this creates a bad user experience and would like to avoid this.
I have already set the background of the map activity to @null as suggested by one of the UI improvement articles on googles developer page. Which I fell does not do the trick.
Is there a way to improve this? I would not like the main home screen to get stuck on the launch of the activity, even a transfer to the map activity and then loading the mapview would be better.
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Jul 26, 2010
I'm trying to call a method from inside a Runnable that is running. It waits for a string to be entered and when it is then depending on the string (the strings act as commands) it calls a method and is supposed to run whats inside it. code...
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Jan 26, 2010
I want to catch any onTouchEvent() on the mapview. After search lots of questions&answers, I found only when I write my own MapView(MyMapView)and define onTouchEvent, then use this MyMapView in main activity.
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Jul 16, 2010
I had found a lot of stackoverflow post about save an Activity and the reload it.
My question: How can I have an Activity with an MapView and after reload the same mapview?
What is the best way to switch between activity and views?
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Sep 26, 2010
Is there anyway I can create a dynamically filled ListView when the class does not extend ListActivity?
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Aug 2, 2010
I am quite new to Android and Java
I am looking for example of how to use this class:
SingleLaunchActivityTestCase
Till now I am using class InstrumentationTestCase but the problem is that for each launched test case Android calling onSetup() and TearDown()
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Jun 19, 2010
Can I use getCacheDir() only in a class that extends Activity? I would like to use it in an AsyncTask so that I can do the time intensive cache file saving in it.
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Sep 23, 2012
I'm doing that sample: [URL] ....
I want to change at this line
public void onClick(View v) {layout.setVisibility(GONE);}
to
public void onClick(View v) {
Intent myIntentopen = new Intent(MainActivityold.class, MainActivitynew.class);
startActivity(myIntentopen);
}
but it dosn't work.
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Oct 1, 2010
I have a simple activity program in android. Basically the class just extends Activity.
But when I start it I get a ClassCastException in the constructor of my class. I don't even have a constructor defined, so it must be in the constructor of the superclass which is Activity. Unfortunately the debugger doesn't give any detailed information on what class it is trying to cast. Here is the stacktrace:
Thread [<1> main] (Suspended (exception RuntimeException))
ActivityThread$PackageInfo.makeApplication(boolean, Instrumentation) line: 649
ActivityThread.handleBindApplication(ActivityThread$AppBindData) line: 4232
ActivityThread.access$3000(ActivityThread, ActivityThread$AppBindData) line: 125
ActivityThread$H.handleMessage(Message) line: 2071
ActivityThread$H(Handler).dispatchMessage(Message) line: 99
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]
And when I look into this runtimeexception I get:
detailMessage "Unable to instantiate application com.test.MyApp: java.lang.ClassCastException: com.test.MyApp" (id=830067694464)
The only code is:
package com.test;
import android.app.Activity;
public class MyApp extends Activity {
}
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Sep 23, 2012
I'm doing that sample:
http:[url].....
I want to change at this line
public void onClick(View v) {layout.setVisibility(GONE);}
to
public void onClick(View v) {
Intent myIntentopen = new Intent(MainActivityold.class, MainActivitynew.class);
startActivity(myIntentopen);
}
but it dosn't work.
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Jun 19, 2010
My app crashes with a null pointer exception on the code below. I have an xml preference file under res/xml/defaults.xml
public class Preference extends Activity {
public Preference() {
} public String getPreference(String key)
{ //it still crashes here
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this.getApplicationContext());
String result = settings.getString(key, null); return result;
} }
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Aug 27, 2010
My app is comprised of a set of reusable Activities that other apps can reuse. For various reasons, I would like my Activities to be launched in context of the invoking Activity's process, instead of always being launched in my Activity's process (default behavior on Android). How can I achieve this?
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Aug 31, 2009
In my android project, I have 2 Activities. How can I launch an Activity from an Activity. I know I can do 'startActivity', but my activity has NOT registered for any Intent, is there anyway I can still launch it from my activity?
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Jan 7, 2010
Is it possible to make 2 MapView on one Activity ?
If so, How to make it ?
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Mar 24, 2009
I have created map view using XML layout in MapActivity and want to use this map view in another Activity group. I got mapview object in Acitivity group using GetWindow.Decorview(), MAP view is also displayed in the same layout of Activity Group. But without any image, only white background with some grid. Map view is not getting refreshed when i scroll on Map view. But if i launch independently MapActivity , i am able to see the map and it is getting refreshed when i scroll on the map. May I know how can i use and refresh Map view in an activity group? As Mapview can only be created/inflated in MapActivity.
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Jul 24, 2009
For now i have a list, using extends listactivity, and now i want to add mapview on the same activity using framelayout probably,
but if i want to use the mapview, the activity must extends mapactivity,
one must extends mapactivity,the other must extends list activity,
if it possible to do that?
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Jan 13, 2010
I'm trying from main Activity (MainFile.java) to open a Map as a new intent through a menu. Something like this...
CODE:..............
And I already have set up thing on my manifest.xml with access to...
CODE:........
It worked fine with other File.class, but with the Map.class doesn't seem to be working.
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Nov 30, 2009
I have 2 projects (each has its own apk). Can you please tell me how can I launch an activity which is in another apk that I created? I have this activity which I want to launch from another project: what should I put in here so that I can launch this from another activity in another project?
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Apr 24, 2010
Is it in any way possible to launch an activity from the main function without having a UI? i.e. is there a way to create a sort of "wrapper" around another activity, i.e. by launching the main activity, it takes you to another activity automatically. If that is not possible, is there a way to remove the main activity from the stack so that clicking the back button does not take you to a blank UI?
Here's an example of what I'm trying to do:
public class WrapperActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:555-1212"));
startActivity(intent);
}
}
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Feb 18, 2010
For example, typing "321" launches my application.
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May 5, 2009
How can I launch an android activity, defined with.* public class MyActivity extends Activity {...}.from a Java method ?
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Mar 6, 2010
I can launch several activities by clicking on link. These Activities are - phone dialing, web browser and probably couple more. My question is how to extend this list? How to make new Activity launch-able by link clicking? Let's say if someone receives email with link myapp://something.here?par1=val1 and clicks on this link my Activity starts. Is it doable?
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Mar 4, 2009
Is there a way to launch an activity from the web page? Like <a href="dialer:123456">Call me </a>?
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Oct 21, 2009
How to set a shortcut key to launch an activity ? Lets say I have an app "TestApp". I want to set a shortcut key (e.g alt + T ) to launch activity of TestApp. Is there any way to set such shortcuts to android apps?
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Dec 28, 2009
I'm new to Android development, so I might be missing something obvious. I want to launch an activity when the user's phone clock hits a specified time (similar to an alarm). However, I'm not sure how I would go about doing this as constant polling of the clock seems inefficient and a waste of resources. Do I need to capture broadcast events from the lclock, or use PendingIntents?
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Jun 2, 2010
I have an screen that displays all the names in the Contacts in a ListView. When the user clicks on a name, I want to launch another Activity which display the details of the selected Contact (Phone number/ email) in another screen. How do I display details for the selected row. (i.e When starting the intent how do I send over the row_id of the item selected)?
I've tried the following code:
Intent i = new Intent(this, ContactDetails.class);
startActivity(i);
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Jul 29, 2010
In order to keep some native code happy, I need to launch an activity in a new process. Does anyone know how to do this?
I can set the activity's process attribute in the manifest, but this will cause *all* instances of the activity to appear in the *same* process, which I can't have.
I'm willing to use internal APIs for this, and I've found Process.start(), but it's not at all clear how this is supposed to be used.
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Jul 14, 2010
I'm currently running into an issue that makes sense but I'm not too sure how to resolve it... Here is the scenario: App v1 icon LAUNCH is set to Activity Main from the manifest file. App v2 icon LAUNCH is set to Activity All from the manifest file and Activity Main no longer exists. After updating to App v2 the app icon fails to launch the application saying it doesn't exist! After a restart of the phone things work. So how can I refresh the applications package or better the launch icon and shortcut icons so that my users don't experience this after an upgrade of my newest app version?
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Jun 22, 2010
i have a launcher activity which shows up the blank screen at the start up..i want to show up some animation using an animatd.gif...i initialize my layouts viz home etc when the oncreate of launcher is called, but how do i add some animated image until my first layout is shown..i also doubt whether android supports animated gifs or i have to do a workaround.
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Sep 27, 2009
1. i have a service that will launch an activity. How to make the activity launched like a phone call? i mean when the phone screen is locked, it will awaken.
2. how to start a service right after downloaded and installed from android market?
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