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2014/10/16 ¤W¤È 08:12:18
android Programming Glossary: deriveAndroid 4.2 broke my encrypt/decrypt code and the provided solutions don't work http://stackoverflow.com/questions/13433529/android-4-2-broke-my-encrypt-decrypt-code-and-the-provided-solutions-dont-work First a disclaimer DO NOT ever use SecureRandom to derive a key This is broken and doesn't make sense If you're reading.. SecretKeySpec keyBytes AES If you're using a password to derive a key follow Nelenkov's excellent tutorial with the caveat that.. password password Store these things on disk used to derive key later int iterationCount 1000 int saltLength 32 bytes should..
http://stackoverflow.com/questions/13746351/mapfragment-in-scrollview scrolls the containing ScrollView . I could theoretically derive a view class MapView and add that functionality but how can..
detecting an incoming call coming to an android device http://stackoverflow.com/questions/15563921/detecting-an-incoming-call-coming-to-an-android-device Date break lastState state Then to use it simply derive a class from it and implement a few easy functions whichever..
Get GPS Status on location changed http://stackoverflow.com/questions/16393428/get-gps-status-on-location-changed GPS Status on location changed I am using GPS services to derive latitude longitude in my App. I am able to get the latitude..
More efficient way of updating UI from Service than intents? http://stackoverflow.com/questions/2621395/more-efficient-way-of-updating-ui-from-service-than-intents specifics. Your application currently consists of Activity derived and Service derived classes for the most part. Inherently you.. currently consists of Activity derived and Service derived classes for the most part. Inherently you get functionality.. which exists already in both of these classes because they derive from Context to my ApplicationEx class. So........ All that..
How to calculate distance based on phone acceleration http://stackoverflow.com/questions/4329164/how-to-calculate-distance-based-on-phone-acceleration s 0m s s 5m s s 7m s s assuming an 80ms sample rate we can derive the following velocities 0.72m s what you get from accelerating.. s 0.96m s 0.96m s 0.96m s 0.56m s 0m s from that we can derive the following distances 57.6mm what you get from moving at 0.72m.. 134.4mm 211.2mm 288mm 364.8mm 409.6mm Now if you take the derived distances and do a reverse calculation as per usual v s2 s1..
android RadioButton button drawable gravity http://stackoverflow.com/questions/4407553/android-radiobutton-button-drawable-gravity buttonDrawable.getIntrinsicWidth y height You will have to derive a new class from RadioButton and override onDraw . EXAMPLE ADDED..
Android - Calling a method in one activity from another, without starting new activity http://stackoverflow.com/questions/5086446/android-calling-a-method-in-one-activity-from-another-without-starting-new-ac why not create a base class for your activities that derives from Activity. public class ActivityBase extends Activity public.. Activity public void showToast ... Then your activities derive from this public class MyActivity extends ActivityBase public..
Scroll webview horizontally inside a ViewPager http://stackoverflow.com/questions/7774642/scroll-webview-horizontally-inside-a-viewpager to make the solution work also on pre ICS. To do so simply derive your own class from WebView public class ExtendedWebView extends..
http://stackoverflow.com/questions/8091519/pbkdf2-function-in-android Is there PBKDF2 implementation for Android. I am trying to derive a key using PBKDF2 function. I couldn't find an example to do..
How to create a resizable rectangle with user touch events on Android? http://stackoverflow.com/questions/8974088/how-to-create-a-resizable-rectangle-with-user-touch-events-on-android improve this question To implement a custom view you derive a class from View Override onDraw for looks override onTouchEvent.. views. For looks just use ready made images feel free to derive from ImageView . Dragging is implemented as moving your view..
Difference between Button with image, ImageButton, and clickable ImageView? http://stackoverflow.com/questions/9420431/difference-between-button-with-image-imagebutton-and-clickable-imageview for ImageButton you can with a regular button. They all derive from view but looking at the following extends change may help..
http://stackoverflow.com/questions/9718245/webview-in-scrollview you need to use Java reflections to call it. I suggest to derive a new class as followed public final class WebViewWithTitle..
Android 4.2 broke my encrypt/decrypt code and the provided solutions don't work http://stackoverflow.com/questions/13433529/android-4-2-broke-my-encrypt-decrypt-code-and-the-provided-solutions-dont-work android cryptography bouncycastle share improve this question First a disclaimer DO NOT ever use SecureRandom to derive a key This is broken and doesn't make sense If you're reading an AES key from disk just store the actual key and don't go.. for AES usage from the bytes by doing SecretKey key new SecretKeySpec keyBytes AES If you're using a password to derive a key follow Nelenkov's excellent tutorial with the caveat that a good rule of thumb is the salt size should be the same.. output. It looks like this User types in their password String password password Store these things on disk used to derive key later int iterationCount 1000 int saltLength 32 bytes should be the same size as the output 256 8 32 int keyLength 256..
http://stackoverflow.com/questions/13746351/mapfragment-in-scrollview touches so if you try to pan vertically in the map it just scrolls the containing ScrollView . I could theoretically derive a view class MapView and add that functionality but how can I get MapFragment to use my customised MapView instead of the..
detecting an incoming call coming to an android device http://stackoverflow.com/questions/15563921/detecting-an-incoming-call-coming-to-an-android-device else onOutgoingCallEnded savedNumber callStartTime new Date break lastState state Then to use it simply derive a class from it and implement a few easy functions whichever call types you care about public class CallReceiver extends..
Get GPS Status on location changed http://stackoverflow.com/questions/16393428/get-gps-status-on-location-changed GPS Status on location changed I am using GPS services to derive latitude longitude in my App. I am able to get the latitude and longitude when the signal is avialable. Once i get a fix..
More efficient way of updating UI from Service than intents? http://stackoverflow.com/questions/2621395/more-efficient-way-of-updating-ui-from-service-than-intents all paused . EDIT In response to the comment here's more specifics. Your application currently consists of Activity derived and Service derived classes for the most part. Inherently you get functionality from an instance of the android.app.Application.. In response to the comment here's more specifics. Your application currently consists of Activity derived and Service derived classes for the most part. Inherently you get functionality from an instance of the android.app.Application class. This.. method that casts the return value of getApplicationContext which exists already in both of these classes because they derive from Context to my ApplicationEx class. So........ All that being said you add a CurrentActivity property to your ApplicationEx..
How to calculate distance based on phone acceleration http://stackoverflow.com/questions/4329164/how-to-calculate-distance-based-on-phone-acceleration following acceleration readings 9m s s 3m s s 0m s s 0m s s 0m s s 5m s s 7m s s assuming an 80ms sample rate we can derive the following velocities 0.72m s what you get from accelerating 9m s for 80ms 0.96m s 0.96m s 0.96m s 0.96m s 0.56m s 0m.. 0.72m s what you get from accelerating 9m s for 80ms 0.96m s 0.96m s 0.96m s 0.96m s 0.56m s 0m s from that we can derive the following distances 57.6mm what you get from moving at 0.72m s for 80ms 134.4mm 211.2mm 288mm 364.8mm 409.6mm Now if.. 57.6mm what you get from moving at 0.72m s for 80ms 134.4mm 211.2mm 288mm 364.8mm 409.6mm Now if you take the derived distances and do a reverse calculation as per usual v s2 s1 t and a v2 v1 t you should get the acceleration readings back...
android RadioButton button drawable gravity http://stackoverflow.com/questions/4407553/android-radiobutton-button-drawable-gravity left aligned. Note the line buttonDrawable.setBounds 0 y buttonDrawable.getIntrinsicWidth y height You will have to derive a new class from RadioButton and override onDraw . EXAMPLE ADDED LATER Ok so here's what you do. Firstly here's a layout..
Android - Calling a method in one activity from another, without starting new activity http://stackoverflow.com/questions/5086446/android-calling-a-method-in-one-activity-from-another-without-starting-new-ac If it's shared functionality between more than one Activity why not create a base class for your activities that derives from Activity. public class ActivityBase extends Activity public void showToast ... Then your activities derive from this..
Scroll webview horizontally inside a ViewPager http://stackoverflow.com/questions/7774642/scroll-webview-horizontally-inside-a-viewpager Otherwise we need to implement this method on our own to make the solution work also on pre ICS. To do so simply derive your own class from WebView public class ExtendedWebView extends WebView public ExtendedWebView Context context super context..
http://stackoverflow.com/questions/8091519/pbkdf2-function-in-android function in Android Is there PBKDF2 implementation for Android. I am trying to derive a key using PBKDF2 function. I couldn't find an example to do so. android pbkdf2 share improve this question Free options..
How to create a resizable rectangle with user touch events on Android? http://stackoverflow.com/questions/8974088/how-to-create-a-resizable-rectangle-with-user-touch-events-on-android this Thanks in advance android shape user interaction share improve this question To implement a custom view you derive a class from View Override onDraw for looks override onTouchEvent for input processing. Note that in Android you cannot.. invalidate . You can implement draggable corners as separate views. For looks just use ready made images feel free to derive from ImageView . Dragging is implemented as moving your view in response to touch events. RelativeLayout is your friend..
Difference between Button with image, ImageButton, and clickable ImageView? http://stackoverflow.com/questions/9420431/difference-between-button-with-image-imagebutton-and-clickable-imageview as a clickable image does not. You also can't call setText for ImageButton you can with a regular button. They all derive from view but looking at the following extends change may help a little. java.lang.Object android.view.View android.widget.ImageView..
http://stackoverflow.com/questions/9718245/webview-in-scrollview horizontally. As this method isn't exported by the API you need to use Java reflections to call it. I suggest to derive a new class as followed public final class WebViewWithTitle extends ExtendedWebView private static final String LOG_TAG..
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