I want to know optimization techniques for databases that has nearly 80,000 records,
list of possibilities for optimizing
i am using for my mobile project in android platform
i use sqlite,i takes lot of time to retreive the data.
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I need to find where the bottlenecks are in my Android app.
What profiling tools or techniques can I use?
I'm getting started with OpenGL ES on Android and I'd looking to learn some techniques to have a game map larger than the visible area.I'm assuming I've somehow got to ensure that the system isn't rendering the entire scene, including what's outside of the visible area.I'm just not sure how I'd go about designing this.This is for simple 2D top-down tile based rendering. No real 3D except what's inherent in OpenGL ES itself.Would anyone be able to get me started on the right path? Are there options that might scale nicely when I decide to start tilting my perspective and doing 3D?
View 1 Replies View RelatedI need to explore the world "You wrote a killer application, but do you have an Android/iPhone/iPad client?".
My questions are:
1) which is the best way to send data to those devices? Soap and Rest as suggested here? Or are there some specific techniques? (My app is written in Delphi and I can expose data with webservices if needed)
2) For x-platform (where by x I mean basically apple products and android) development is there a tool? Or the only solution is write one client per platform that "embeds" a web application optimized for mobile devices?
3) which are the techniques for caching locally some data / working offline? Is it different in the 2 worlds or is it common?
I've noticed that the PNGs of my application with some gradients effects looked terribly bad at the device (a Samsung Galaxy) and at the emulator, and I've found the following note at the documentation (http://developer.android.com/guide/topics/graphics/2d- graphics.html):
Image resources placed in res/drawable/ may be automatically optimized with lossless image compression by the aapt tool. For example, a true-color PNG that does not require more than 256 colors may be converted to an 8-bit PNG with a color palette. This will result in an image of equal quality but which requires less memory. So be aware that the image binaries placed in this directory can change during the build. If you plan on reading an image as a bit stream in order to convert it to a bitmap, put your images in the res/raw/ folder instead, where they will not be optimized."
I've tried the res/raw suggestion, but it didn't worked.
I've tried to use the image as JPEG as a workaround, but I couldn't use 9-patch.
I've uploaded a comparison between the original png and the "optimized" png that is shown on the emulator or devices: [url]
One workaround would be put the images at /assets/ and manually load and set the image on the ImageViews, but it requires a lot of code changes.
I want to do screen optimization. That means once I develop the UI in android it should fit exactly the same in all android enabled phones. So how do i do it?
View 1 Replies View RelatedWhat sections of kernel code are changed for optimization of performance.
Like we can change
1) the minimum free memory that android need to keep free.
2) Rate of clearing cache
3)Advanced LMK- where we can kill more than one process at at time when memory scarcity occurs.
4) Reducing logging.
5) In framework we can change the oom_adj value of important processes.
6) Implement Zram for kernel.
7) change the minimum and maximum no of process for AMS.
I want to know all the changes that can be made into kernel or framework code to optimize performance. I also want to know how can we implement swapcache for android kernel. What changes do i need to make in the code.
I know rule #1 of optimization is: don't do it! But I figured this was an easy question, and if I start using the faster method now I can save a lot of cpu time when I'm finished.Now, the answer to my question may be "there's no difference" and that's fine with me. I just want to know.
View 4 Replies View RelatedAny idea? It doesn't seem to close apps like TaskKiller or TaskPanel. So what is it doing?
View 4 Replies View RelatedI have a long list to display in a listview. Let's say 200 items. This is a long list, but i can't reduce it. Now my list is slow and is not convenient for the user.I need something like a paging system: at the beginning I load 25 items. When the user reach the end I show a button, or something like it, to load other 25 items. An Iphone style solution.Is there a better way? Or what is the best solution?
View 1 Replies View RelatedI just encountered the following situation. I have an Android app with a scenario which I guess may happen in multiple apps. It's about tagging/labeling/categorizing, call it as you want.After CommonsWare's feedback here a bit of a clarification. I'm weird about doing the second query to the DB inside the CursorAdapter, basically this would result in one query per row and I fear this will heavily impact my performance (I've still to test it on a real device with a substantial amount of data to see how much this impacts).My question therefore is on whether there are some strategies on how to avoid this given my data model or whether I have to basically "live" with that :)
View 2 Replies View RelatedI'm trying to debug native library (in particular, libril.so). Everythig is going fine, breakpoint is being hit, I can go thru the lines of RIL_onRequestComplete() function. But when I tried to print out particular struct I got,
(gdb) print pRI $2 = <value optimized out> (gdb) print pRI->pCI $3 = (android::._115 *) 0x613 (gdb) print pRI->pCI->requestNumber Cannot access memory at address 0x613
I suspect it could be due to optimization done by compiler. But when I tried to add,
LOCAL_CFLAGS := -g3 -O0
into makefile of the lib, I've got another problem when I cannot correctly set breakpoint on desired function. Instead of correct one,
(gdb) break RIL_onRequestComplete Breakpoint 1 at 0xae402e4e: file hardware/ril/libril/ril.cpp, line 1800.
I got,
(gdb) break RIL_onRequestComplete Breakpoint 1 at 0xffffab44: file bionic/libm/src/s_tanf.c, line 42.
Does anybody know what could be a problem, and what is the right way to handle this?
I've made a few apps now, which use an SQLite database, no problems. In my latest app, I want two tables, and I just released that every example I can find only creates one table. So, is this a limitation? Must I use only one table? Assuming I can use two, how do I go about changing my create script?
View 3 Replies View RelatedI believe the Java API does not give full access to the SMS database and other databases. Is there any way to have root access to some of those databases such as SMS and phone settings so that I can fetch some information out of it?
View 3 Replies View RelatedI have ListView whose CursorAdapter is bound to my local database table. Is there a good way to make it so that when new entries / new data is inserted into my table, my ListView automatically refreshes?
This is easily done on ContentProviders via ContentObservers. How do I do the same when iterating over local databases?
Lets say Im creating an Android app for a company that already provides some sort of online service. I want my android app to extend this online service and I want the app to interact with my remote databases, would I embed a web browser in my application or directly connect to my remote database from within my code? If I am directly connected to a database from within code and not through a web browser, would that be a security risk since the connection info would be distributed in the code?
View 2 Replies View RelatedI am trying to create an application that reads information from a database on a separate server(not the android phone). Does anyone have any information on how to create a database connector class?
View 3 Replies View RelatedIs there any way to create triggers on different databases? my requirement is like:-
database: a1.db consist table: t1
database:a2.db consist table: t2
now i have to use trigger on t1 (whenever any delete and update operation) happens on t1 a value has to be inserted into t2. waiting for your feedback...
Well I have S4 I9500 and whenever I tried to connect to my work network after updating to a clean android 4.3*OTA, I receive a notification stating that: This network has been disconnected.You need to sign-in again. This also happened to all 4.3 users in my workplace. 2 colleagues using Note 3 and another colleague using S4 19500. All of us can log onto various networks outside of our workplace like home and coffee shops. After doing some research I found out that I have to turn off wifi optimization but that option is not available in S4.
View 2 Replies View RelatedCan anyone tell me, is it possible to use the ADB to pull and push a database from an app, without root privileges on the phone? For example, I know the location on my rooted magic and dream is:
/data/data/com.xxxx.xxxx/databases/xxxx
I know that you can use ADB without root, but when trying to use the shell - you can't view that location without root privaliges. But I have been told you can use push and pull if you know the file you want? Basically I want to pull a database from MY app on a non rooted phone modify it and push it back on. Only trouble I have is, the two phones I have are both root and I don't have access to a non root one to try it out.
I have some external sqlite files I'd like to include with my app. It looks like I can add them to the /assets folder, then read them from there? Is the /assets folder the appropriate location for them?
I've used SQLiteOpenHelper to open databases my app creates at runtime, which just uses a unique db name. Will the sqlite files in the assets folder also be accessible using SQLiteOpenHelper in the same manner?
I'm trying this with my Nexus One.
I have the android SDK and have used the command
adb pull /data/data/com.myapp.android/databases C:pulls
but all I get is
pull: building file list...
0 files pulled. 0 files skipped.
Also, it seems no matter how much data I add to the tutorial NotePad app I installed, the data size for the app (as shown in Settings) never exceeds 8KB. How is this possible? Is there some other place where databases are stored? When I use the File Explorer view (that's part of ADT) in Eclipse, I see there's nothing in /data.
To add a twist, I have no trouble pulling any other files from the device. It's just databases I have trouble with.
Is there any tool that will allow me to browse databases on my Android device? Something like Sql Management Studio - you know GUI tool that displays databases, tables, row in tables, etc.
I'm using Eclipse for development (if it is important for plug-in suggestions).
Like the title says, I need a good app to record and set to ringtone...
View 4 Replies View RelatedI just got my phone about 4 days ago, and when opening apps, unlocking, opening contact lists etc etc, it just lags heaps. Does anybody else have the same issue? Could it just be an optimization thing or something?
View 35 Replies View RelatedI would like to know is there any tool in android to find memory leak and code optimization.
View 8 Replies View RelatedTry to select (or update) from custom databases (for example mmssms.db) but on init I see " Unable to open the database file". Try send permissions in manifest <uses-permission android:name="android.permission.WRITE_SMS"/> <uses-permission android:name="android.permission.READ_SMS"/> but this doesn't help.
View 2 Replies View RelatedIs there a way to programatically get the path to the databases/files an application uses instead of hardcoding "data/data/mypackage.com/database.db" ?
View 1 Replies View RelatedI managed to configure iJetty on the emulator and I am setting up both a REST-based and SOAP-based services on it.
Regarding sqlite3. I am able to run and control it remotely using the shell. is there a way to generate databases on the device using the remote tool? I didn't find any evidence that that is possible and I think the only way may be through the API. I just wanted to double check in case I missed this.
Android includes a database engine (SQLite). In general, do the applications keep/manage their own databases (files) or is there a unifying database manager?
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