Android Common Code

1. Picture rotation

Bitmap bitmaporg = Bitmapfactory.decoderesource (This.getcontext (). Getresources (), R.drawable.moon); Matrix matrix = new Matrix (); Matrix.postrotate (-90);//rotation angle Bitmap Resizedbitmap = Bitmap.createbitmap (bitmaporg, 0, 0,< C0/>bitmaporg.getwidth (), Bitmaporg.getheight (), Matrix, True); Bitmapdrawable BMD = new bitmapdrawable (RESIZEDBITMAP);

2. Get mobile phone number

Create phone Management Telephonymanager TM = (telephonymanager)//Connect with phone Activity.getsystemservice (context.telephony_service);// Get the phone number string Phoneid = Tm.getline1number ();//Remember to add <uses-permissionandroid:name= in manifest file    " Android.permission.READ_PHONE_STATE "/>//program cannot be implemented on the simulator, must be connected to the phone

3. Formatting strings in the String.xml

In Strings.xml.. <string name= "My_text" >thanks for visiting%s. You are%d!</string>          //And in the Java Code:String.format (getString (R.string.my_text), "Oschina", 33);

4, Android Settings full screen method A. Set in Java code

/** full screen settings, hide windows all decorations */requestwindowfeature (window.feature_no_title); GetWindow (). SetFlags ( WindowManager.LayoutParams.FLAG_FULLSCREEN,                WindowManager.LayoutParams.FLAG_FULLSCREEN);

B. Configure in Androidmanifest.xml

<activity android:name= ". Login.netedit "  android:label=" @string/label_net_edit "           android:screenorientation=" Portrait "Android: Theme= "@android: Style/theme.black.notitlebar.fullscreen" ><intent-filter><action android:name= " Android.intent.Net_Edit "/><category android:name=" Android.intent.category.DEFAULT "/></intent-filter ></activity>

5, set the activity as dialog form

Configuring the Activity node in Androidmanifest.xml is the configuration theme as follows:

Android:theme= "@android: Style/theme.dialog"

6, check whether the current network is connected

Connectivitymanager con= (Connectivitymanager) Getsystemservice (activity.connectivity_service);   Boolean Wifi=con.getnetworkinfo (Connectivitymanager.type_wifi). isconnectedorconnecting ();  

To increase permissions in Androidmanifest.xml:

<uses-permission android:name= "Android.permission.ACCESS_NETWORK_STATE"/>

7. Detect if a intent is valid

public static Boolean isintentavailable (context context, String action) {    final Packagemanager Packagemanager = Conte Xt.getpackagemanager ();    Final Intent Intent = new Intent (action);    list<resolveinfo> list =            packagemanager.queryintentactivities (Intent,                    Packagemanager.match_default _only);    return list.size () > 0;}

8. Android Phone Call

try {   Intent Intent = new Intent (intent.action_call);   Intent.setdata (Uri.parse ("tel:+110"));   StartActivity (intent);} catch (Exception e) {   log.e ("SampleApp", "Failed to invoke", E);}

9. Send email in Android

Intent i = new Intent (intent.action_send);  I.settype ("Text/plain"); Simulator please use this line i.settype ("message/rfc822"); On the real machine use this line I.putextra (Intent.extra_email, New string[]{"[email protected]", "[email protected]});  I.putextra (Intent.extra_subject, "SUBJECT goes Here");  I.putextra (Intent.extra_text, "body goes Here");  StartActivity (Intent.createchooser (i, "select Email application."));

10. Open browser in Android

Intent viewintent = new     Intent ("Android.intent.action.VIEW", Uri.parse ("http://vaiyanzi.cnblogs.com")); StartActivity (viewintent);

11, Android acquisition device unique identification code

String android_id = secure.getstring (GetContext (). Getcontentresolver (), secure.android_id);

12. Get IP address in Android

Public String getlocalipaddress () {    try {for        (enumeration<networkinterface> en = Networkinterface.getnetworkinterfaces (); En.hasmoreelements ();) {            NetworkInterface intf = En.nextelement ();            for (enumeration<inetaddress> enumipaddr = intf.getinetaddresses (); enumipaddr.hasmoreelements ();) {                InetAddress inetaddress = Enumipaddr.nextelement ();                if (!inetaddress.isloopbackaddress ()) {                    return inetaddress.gethostaddress (). toString ();}}}    catch (SocketException ex) {        log.e (Log_tag, ex.tostring ());    }    return null;}

13. Get the memory card path and usage of Android

Add new contacts to Android

Private Uri insertcontact (context context, string name, String phone) {          contentvalues values = new Contentvalues (); 
   values.put (People.name, NAME);       Uri uri = Getcontentresolver (). Insert (People.content_uri, values);       Uri Numberuri = Uri.withappendedpath (URI, People.Phones.CONTENT_DIRECTORY);       Values.clear ();              Values.put (Contacts.Phones.TYPE, People.Phones.TYPE_MOBILE);       Values.put (People.number, phone);       Getcontentresolver (). Insert (Numberuri, values);              return URI;}

15. View Battery Usage

Intent intentbatteryusage = new Intent (intent.action_power_usage_summary);        StartActivity (Intentbatteryusage);

Android Common Code