Tools commonly used in Android 02

1. Read Phone contact information

Generally used in reading phone address Book upload, this piece more.

Import Java.util.arraylist;import Java.util.list;import Android.content.contentresolver;import Android.content.context;import Android.database.cursor;import Android.provider.contactscontract.commondatakinds.phone;import Android.text.textutils;import com.iss.starwish.bean.phonecontact;/** * Read Phone contact information */public class Readphonecontactutil {/** * through Content Viewer, or mobile contact information **/ public static list<phonecontact> getphonecontacts (Context mcontext) {list<phonecontact> phonecontacts = New Arraylist<phonecontact> (); Contentresolver resolver = Mcontext.getcontentresolver (); string[] phones_projection = new string[] {phone.number,phone.display_name};//get phone contact cursor Phonecursor = Resolver.que RY (phone.content_uri,phones_projection, NULL, NULL, NULL), if (phonecursor! = null) {while (Phonecursor.movetonext ()) {/ /Get Mobile number string phonenumber = phonecursor.getstring (0);//When the mobile number is empty or the empty field skips the current loop if (Textutils.isempty (PhoneNumber)) continue;//get Contact name string contactName = phonecursor.getstring (1);p hoNecontacts.add (New Phonecontact (Contactname,phonenumber));}} return phonecontacts;}}

2. Get the resource ID by the name of the resource

This is most commonly used in internationalization or one-click to modify the theme of this piece, depending on the language environment, switch different string identifiers. Switch between different themes depending on the file name

Package Net.tianyouwang.utils;import android.content.context;/** * Use the field name to dynamically get the ID of the resource. In this class, the ID can be obtained dynamically through the field name. */public class Resourceutil {public static int Getlayoutid (context context, String paramstring) {return cont     Ext.getresources (). Getidentifier (paramstring, "Layout", Context.getpackagename ()); public static int Getstringid (context context, String paramstring) {return context.getresources (). Getidenti     Fier (paramstring, "string", Context.getpackagename ()); public static int Getdrawableid (context context, String paramstring) {return context.getresources (). Getiden     Tifier (paramstring, "drawable", Context.getpackagename ()); public static int Getstyleid (context context, String paramstring) {return context.getresources (). getidentif     IER (paramstring, "style", Context.getpackagename ());     } public static int getId (context context, String paramstring) {    Return Context.getresources (). Getidentifier (paramstring, "id", Context.getpackagename ()); public static int Getcolorid (context context, String paramstring) {return context.getresources (). getidentif     IER (paramstring, "Color", context.getpackagename ()); public static int Getanimationid (context context, String paramstring) {return context.getresources (). Get     Identifier (paramstring, "Anim", Context.getpackagename ()); public static int Getbooleanid (context context, String paramstring) {return context.getresources (). getId     Entifier (paramstring, "bool", Context.getpackagename ()); public static int Getarrayid (context context, String paramstring) {return context.getresources (). Getiden     Tifier (paramstring, "array", Context.getpackagename ()); }}

3. Operation of SDcard state and sdcard remaining capacity

Import Java.io.file;import java.io.fileoutputstream;import java.io.ioexception;import android.os.Environment; Import Android.os.statfs;import android.text.textutils;/*** * SDcard remaining capacity judgment operation * */public class Sdcardavailableutils { private static final int imageSize = 1*1024*1024;//1m public static Boolean Isexistsdcard () {if (ANDROID.OS.ENV Ironment.getexternalstoragestate (). Equals (Android.os.Environment.MEDIA_MOUNTED) &&        Getavailablestore (Environment.getexternalstoragedirectory (). GetPath ()) > ImageSize) {return true;     } else return false; } public static void Savedatatolocalfile (string data, String FilePath) {if (! Textutils.isempty (data) &&!            Textutils.isempty (FilePath)) {File File = new file (FilePath);            FileOutputStream outstr = null;                try {if (!file.exists ()) {file.createnewfile (); } OUTstr = new FileOutputStream (file);                    if (outstr! = null) {Outstr.write (Data.getbytes ());                Outstr.flush ();            }} catch (IOException e) {e.printstacktrace ();                    } finally {if (outstr! = null) {try {outstr.close ();                    } catch (IOException e) {e.printstacktrace ();                    } finally {outstr = null; }}}}}/** * Get the remaining capacity of the memory card in bytes * * @param filePath * @return Ava Ilablespare */public static long Getavailablestore (String filePath) {//Get SDcard file path StatFs StatFs        = new StatFs (FilePath);        Gets the size of block long blocsize = Statfs.getblocksize ();        Get block number Long totalblocks = Statfs.getblockcount (); The number of blocks that can be used long availablocK = Statfs.getavailableblocks (); Long total = Totalblocks * blocsize;//Overall storage space long Availablespare = Availablock * blocsize;//currently available storage space return    Availablespare; }}