Android :: Activity Crashes When Remote Service Crashes

Jul 16, 2010

I'm trying to understand remote services at the moment and everything works fine, i can start the service and know how to communicate with it through the AIDL-interface. My problem is that the service seems to still run in the same process like the activity it was started from, because the activity crashes too, if there is an error thrown in the Service.

I set the service process to remote ( android:process=":remote" ) so what am i doing wrong? Or what do i have to do to unbind the service-process completely from the activity-process?

Android :: Activity crashes when remote service crashes


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we are developing an application where we are depending on a native, custom-written library which sometimes crashes. When the Activity crashes (it's the Activity's SurfaceView that crashes, either while resuming or pausing Activity) we would like to automatically restart the Activity that was just running, preferably without seeing the idle screen in between. What we find strange is that sometimes, our Activity is restarted by Android automatically after the crash, and sometimes not. How does Android decide this? Is it somehow dependant on exactly what the Activity was doing at the time of the crash and if that was considered important enough to restart? How can we force a restart to make sure the Activity doesn't quit after a crash? Running on device flashed with Android 1.5. The Activity is running as singleInstance. Doesn't seem to make much difference which mode it is though. Other methods we have tried are:

1) Since we can predict when crash is going to happen(but not stop it), use AlamrManager to start the Activity again via an Intent, 3 seconds later. Has the disadvantages that 1) need to be able to predict crash 2) if crash takes longer than 3 seconds (normally about 2s) it won't work 3) Idle screen is seen for about ~1 s, since some slack is needed.

2) Start a Service, then let the Service (which always seems to be restarted by Android after crashing) start the Activity in its onStart method. Has the disadvantage that Android doesn't restart the service until 5 seconds after the crash, so the idle screen is seen quite along time before Activity restarts. Is it possible to modify how long it takes before the Service is restarted by the Android system?

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I am binding a remote service from an activity and unbind the same on the onPause of the Activity,when the activity again restarts i bind the service .It does bind with the remote service and i am also successful in getting the remote-service method getting executed after the restart.But when returning a message from the callback-RemoteCallbackList.the mCallbacks.beginBroadcast returns me 0 clients.Am i missing some thing here ?why am i am getting zero clients when I call mCallbacks.beginBroadcast.?

CODE:....................

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Apr 29, 2010

Iam trying to run an activity from diffrent package from my remote service:

This is how i implement the service.java

CODE:....

Ive also added a line in the manifest of the service:


The service works fine, but i cant run the activity -> PushActivity which is in diffrent package of diffrent application, this is the error:

Activity not found Exception: No Activity found to handle Intent {act=com.pushservice.PushServiceActivity flq=0x10

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I wrote an android program that: has a main activity for UI, and it starts a service. The service timely callbacks the UI activity to update views. It works fine except: if the activity is closed (with BACK) and start again, the service will also be started again (The service plays audio file, so there are two overlapped sounds). I use bindService with BIND_AUTO_CREATE flag to start and connect to service. According to the document, it should create service only if it doesn't exist, but obviously it starts another instance when opened second time. All I want is when the activity is closed, the service goes on running, and when the activity opens again, it can reconnect to the service. Is that possible? Or I just misunderstand the usage of service?

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Nov 24, 2010

In onCreate method of Activity, it binds to a remote service and makes use of AIDL intefaces. Is it required to unbind from the remote service when onDestroy is called on screen orientation change.?

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Oct 26, 2009

I'm trying to create an application that has 3 tabs. Under the middle tab should be a ListView. It starts up fine (on the left tab) but when I click the middle tab it crashes.

The other two tabs are static data specified in the main.xml file. But the middle tab, I try to create dynamically. Here's the code from the main onCreate function:

CODE:...............

Instead I appear to get an exception:

CODE:...............

ContactListActivity is defined this way:

public class ContactListActivity extends ListActivity { ...

I get the feeling that I'm supposed to create the Intent with something like Intent.ACTION_VIEW but this is where I get lost. If this is the problem, I could try stuff until it works, but I'd prefer to understand why.

Or is ContactListActivity supposed to override something ?

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Here's the stack dump. I've looked through the archives and it appears that there are other dumps, but it's really hard to tell from my vantagepoint whether they have anything to do with one another.

This is pretty easily reproducible (especially with one particular url of mine) so it should be relatively easy to track down.

CODE:.................

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I am finally testing my application on a G1 and even though it works fine on the emulator, it crashes on the G1

It crashes when it does:

CODE:.........

And the view is defined like this:

CODE:..............

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Nov 16, 2010

intentTest.java:
package intentTest.xyz.com;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button
public class intentTest extends Activity {
Button b;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
b = (Button) findViewById(R.id.b);
b.setOnClickListener( new View.OnClickListener() {
public void onClick(View view) {
Intent intent = new Intent(intentTest.this,seond.class );
startActivity(intent);
}});
}}
main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="First screen"
/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="click"
android:name="@+id/b"
/>
</LinearLayout>
seond.java:
package intentTest.xyz.com;
import android.app.Activity;
import android.os.Bundle;
public class seond extends Activity{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
} }
second.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="second screen"
/>

manifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="intentTest.xyz.com"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".intentTest"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".seond"></activity>
</application>
</manifest>

I get the following error code:
11-16 01:26:07.156: ERROR/AndroidRuntime(779): Uncaught handler: thread main exiting due to uncaught exception
11-16 01:26:07.166: ERROR/AndroidRuntime(779): java.lang.RuntimeException: Unable to start activity ComponentInfo{intentTest.xyz.com/intentTest.xyz.com.intentTest}: java.lang.NullPointerException
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2401)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at android.app.ActivityThread.access$2100(ActivityThread.java:116)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at android.os.Handler.dispatchMessage(Handler.java:99)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at android.os.Looper.loop(Looper.java:123)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at android.app.ActivityThread.main(ActivityThread.java:4203)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at java.lang.reflect.Method.invokeNative(Native Method)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at java.lang.reflect.Method.invoke(Method.java:521)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at dalvik.system.NativeStart.main(Native Method)
11-16 01:26:07.166: ERROR/AndroidRuntime(779): Caused by: java.lang.NullPointerException
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at intentTest.xyz.com.intentTest.onCreate(intentTest.java:18)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364)
11-16 01:26:07.166: ERROR/AndroidRuntime(779):
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CODE:...................

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It always crashes with the following error:

CODE:.....

My XML file:

CODE:...................

My layout:

CODE:...............

In my code I add the map like this:

CODE:.............

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CODE:.............................

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I should post this as a follow-up to my previous thread.

But I think this problem (may be) somewhat big so I create a new thread:

1. If a user install an alternative to 'Home'. (I'll call it 2nd Home)

2. He set this 2nd Home to launch by default for 'Home' action.

3. Whenever this 2nd Home crashes, their only choice is to reboot the system... ?

Because, after setting 2nd Home as default, the 'chooser' will not come out any more even if you press the 'Home' button.

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