[android-developers] pixel to dpi and scaling question
Hi, I was reading multiple screen support page on SDK doc for solving a pixel to dpi scaling problem in my app. In the doc, it says // Convert the dips to pixels final float scale = getContext().getResources().getDisplayMetrics().density; mGestureThreshold = (int) (GESTURE_THRESHOLD_DIP * scale + 0.5f); My question is why we have to add 0.5f at the end? It indeed works great on high density screen but failed to match the result on medium density screen. For medium density screen, I have to remove the +0.5f. In addition. according to the doc, px - dpi conversion works like px = dpi x (density/160) and there is no mentioning of adding additional 0.5 at the end. Does anybody know why and how it works? Thanks. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] ConvertView and super.getView, difference?
Hi,
A question in Android adapter has confused me for a long time. I have
a code spinet like below
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
View sv = super.getGroupView(groupPosition, isExpanded,
convertView, parent);
V.S
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if(ConvertView == null) {
LayoutInflater inflater = (LayoutInflater)
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
sv = inflater.inflate(R.layout.labelrowgroup, parent,
false);
}
Does anyone know the difference between them?
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[android-developers] Re: How to store a drawable in database?
I want to store all install app's icons in a database so that I don't need to query from lengthy package manager query every time after reboot. On Aug 3, 1:53 am, Matty busbus...@gmail.com wrote: I can't help but wonder why you would want to do this? On Aug 1, 9:12 am, Jerry Fan jerryfan1...@gmail.com wrote: Hi folks, is there anyway that I can store drawables into database? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] ExpandableListView crash when the list starts empty
Hi, I have a problem with ExpandableListView crash. When an ExpaldableListView first starts with empty cursor (cursor without data row) and later on change a cursor with data row. There is 100% chance the ExpandableListView will crash when expand mainGroup item. I am not sure is it a bug in Android because I can't find any bug in my code. Below is the step i used to reproduce the crash (1) In onCreate, create simpleCursorTreeAdapter and make sure the data set returned is empty. (2) In onCreate, add the simpleCursorTreeAdapter to an ExpandableListView (3) when button add is clickked, i will do myAdapter.getCursor ().reQuery(); myAdapter.notifyDataSetChanged() (4) At this point, there will be a newly added and the only row in ExpandableListAdapter. (5) Click on the item to make the list expand. Then my program will crash. Note: It doesn't matter if there is child row under the group i clicked. it will just crash. Logcat report 5971 AndroidRuntime E java.lang.NullPointerException 5971 AndroidRuntime Eat android.widget.SimpleCursorTreeAdapter.bindView (SimpleCursorTreeAdapter.java:200) 5971 AndroidRuntime Eat android.widget.SimpleCursorTreeAdapter.bindChildView (SimpleCursorTreeAdapter.java:218) 5971 AndroidRuntime Eat android.widget.CursorTreeAdapter.getChildView(CursorTreeAdapter.java: 250) 5971 AndroidRuntime Eat com.smart.expense.expense2$myMainExpandableListAdapter.getChildView (expense2.java:578) 5971 AndroidRuntime Eat android.widget.ExpandableListConnector.getView (ExpandableListConnector.java:451) 5971 AndroidRuntime Eat android.widget.AbsListView.obtainView(AbsListView.java: 1272) 5971 AndroidRuntime Eat android.widget.ListView.measureHeightOfChildren(ListView.java: 1142) 5971 AndroidRuntime Eat android.widget.ListView.onMeasure(ListView.java:1055) 5971 AndroidRuntime Eat android.view.View.measure (View.java:7117) 5971 AndroidRuntime Eat android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2929) 5971 AndroidRuntime Eat android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java: 888) 5971 AndroidRuntime Eat android.widget.LinearLayout.measureVertical(LinearLayout.java:350) 5971 AndroidRuntime Eat android.widget.LinearLayout.onMeasure(LinearLayout.java:278) 5971 AndroidRuntime Eat android.view.View.measure (View.java:7117) 5971 AndroidRuntime Eat android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2929) 5971 AndroidRuntime Eat android.widget.FrameLayout.onMeasure(FrameLayout.java:245) 5971 AndroidRuntime Eat android.view.View.measure (View.java:7117) 5971 AndroidRuntime Eat android.widget.LinearLayout.measureVertical(LinearLayout.java:464) 5971 AndroidRuntime Eat android.widget.LinearLayout.onMeasure(LinearLayout.java:278) 5971 AndroidRuntime Eat android.view.View.measure (View.java:7117) 5971 AndroidRuntime Eat android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:2929) 5971 AndroidRuntime Eat android.widget.FrameLayout.onMeasure(FrameLayout.java:245) 5971 AndroidRuntime Eat android.view.View.measure (View.java:7117) 5971 AndroidRuntime Eat android.view.ViewRoot.performTraversals(ViewRoot.java:713) 5971 AndroidRuntime Eat android.view.ViewRoot.handleMessage(ViewRoot.java:1504) 5971 AndroidRuntime Eat android.os.Handler.dispatchMessage(Handler.java:99) 5971 AndroidRuntime Eat android.os.Looper.loop (Looper.java:123) 5971 AndroidRuntime Eat android.app.ActivityThread.main(ActivityThread.java:3948) 5971 AndroidRuntime Eat java.lang.reflect.Method.invokeNative(Native Method) 5971 AndroidRuntime Eat java.lang.reflect.Method.invoke(Method.java:521) 5971 AndroidRuntime Eat com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:782) 5971 AndroidRuntime Eat com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) 5971 AndroidRuntime Eat dalvik.system.NativeStart.main(Native Method) -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] any good uml creation tool for android?
Hi, Is there any free or opensource Eclipce plug in avaliable for UML diagram auto generation for Android? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] how to setViewText in SimpleCursorTreeAdapter?
Hi, I want to do some Local based number formatting. However, I cannot find function similar to setViewText in SimpleCursorTreeAdapter. So I am wondering is there any alternative solution to do manual text view binding in SimpleCursorTreeAdapter? Thanks --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] help with rawQuery statement
Hi, I have a very simple statement like below return conn.rawQuery(select date, sum(amount) from entries where (date='+start+' and date='+end+') group by date,null); This statement works flawlessly in sqlite3 command line. However, it returns nothing if I use it within rawQuery method. Is it a bug or I am misusing rawQuery? Thanks. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] do i need to close cursor?
Hi, Just wondering is it necessary to close cursor when an activity is stopped or pause? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Listview focus out of order when click rapidly
Hi, I noticed that when item in in a list is clicked rapidly, there is chance that item in other row becomes dark. Especially when you click turn on/off bluetooth in system setting quickly. Has anyone noticed it and is there fix for this? Thanks --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] is it possible to display a multi column list ?
Hi, I am looking for a way to create a Microsoft data grid style list in android. But I am wondering is there any available built in component capable of doing this job such as listview? Thanks --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: is it possible to display a multi column list ?
is there any workaround to simulate similar function? On Jul 29, 4:29 am, Jack Ha jack...@t-mobile.com wrote: There's no built-in data grid component. -- Jack Ha Open Source Development Center ・T・ ・ ・Mobile・ stick together The views, opinions and statements in this email are those of the author solely in their individual capacity, and do not necessarily represent those of T-Mobile USA, Inc. On Jul 28, 7:37 am, jerryfan2000 jerryfan1...@gmail.com wrote: Hi, I am looking for a way to create a Microsoft data grid style list in android. But I am wondering is there any available built in component capable of doing this job such as listview? Thanks --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: autostart a service by editing init.rc after apk installation
Hi Hackborn, If all I want to do is to autostart an APK I wrote when system is up, is modifying init.rc the only way? Or there is other way to do it? Thanks. On Jul 21, 2:22 pm, Dianne Hackborn hack...@android.com wrote: Hi, this is very out of the scope of the SDK. If you are building a device, you may be able to get help in android-porting. (Fwiw, init.rc is way way down the stack from launching .apks.) On Mon, Jul 20, 2009 at 10:30 PM, jerryfan2000 jerryfan1...@gmail.comwrote: Hi all, I want to modify init.rc to make one of notification service in my app to autostart when phone is up. However, as far as I know, modifying init.rc requires root access. So If I want to achieve this, is there anyway to do it? Thanks. -- Dianne Hackborn Android framework engineer hack...@android.com Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] autostart a service by editing init.rc after apk installation
Hi all, I want to modify init.rc to make one of notification service in my app to autostart when phone is up. However, as far as I know, modifying init.rc requires root access. So If I want to achieve this, is there anyway to do it? Thanks. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Browser doesn't respond to trackball click event (on certain webpage), touch screen click ok
We found a way to reproduce it. Version: Android 1.5 Application: Browser Reproduce procedure: (1) Open Browser (2）Goto URL www.baidu.com (3) type nothing in the text field but click (with trackball) the button directly Sympton: Clicking submit button in pure CGI form based web page without typing text, there is fail rate that Browser will fail to respond to track ball click. On 6月11日, 下午1時51分, jerryfan2000 jerryfan1...@gmail.com wrote: Hi, We encountered a strange problem in Browser. When browsing certain web page with CGI form, browser doesnt respond to trackball click event unless we play around the UI ormove cursor around or switch between application. However, tocuh screen works all the time. I can't give an example of problem making web site yet. Just wodering is it an isolated case to me. Thanks, Jerry Fan --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Browser doesn't respond to trackball click event (on certain webpage), touch screen click ok
Hi, We encountered a strange problem in Browser. When browsing certain web page with CGI form, browser doesnt respond to trackball click event unless we play around the UI ormove cursor around or switch between application. However, tocuh screen works all the time. I can't give an example of problem making web site yet. Just wodering is it an isolated case to me. Thanks, Jerry Fan --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] how to convert Picture object to Bitmap object?
Hi , I am trying to figure out how to do convertion of Picture object generated by webView to Bitmap for later JPEG encoding and saving to local f/s. I tried to create a bitmap from pre created Picture object by BitmapFactory.decodeStream and failed. Seems like Picture object is unreconginzed format by Bitmap factory. Just wondering is there any method to do the convertion? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Can I use Picture.writeToStream to save picture to filesystem as png or jpeg format?
Hi folks, I am trying to capture screen from WebView and save the picture into either JPEG or PNG formats on android local filesystem. However, documentation of Picture.writeToStream doesn't mention anything about what format it stores or supports. So I am wondering is it possible to do what I want to do in android? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] what is the picture format for Picture.WriteToStream?
Hi, What format of picture will I get by using Picture.WriteToStream? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] webView: How to click a web link and display in my WebView app
Hi, I am trying to add a webview in my app to display a web page. However, every time I click link on the web page, Browser will be launched to display content in that link. I understand it is something about intent but I am still wondering is there any simpler method to ask webview to display link content within its View ? Thanks. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Calendar fail to launch in Cupcake 1.5
Hi, Is there anyone know why Calendar in Cupcake 1.5 fails to launch? I googled and found nothing about this issue. Is it. In addition, I got some error msg with logcat saying superclass of CalendarAppWidgetProvider was unable to resolve. However, I can't find CalendarAppWidgetProvider class from source code nor can I find it by googling the web at all. Hope someone can help. Thanks. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
