Implementation of "Android" Avatar replacement

Now no matter what app has an avatar, if you see no avatar of the app will feel very strange, before the head is square, and then become a round, I estimate in a few years to get a star shape of the head, below I put the code to change the avatar to write:

<relativelayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:tools= "http// Schemas.android.com/tools "android:layout_width=" match_parent "android:layout_height=" Match_parent "Tools:context =". Mainactivity "> <imageview android:id=" @+id/iv_head "android:layout_width=" 200dip "android:l ayout_height= "200dip" android:layout_alignparenttop= "true" android:layout_centerhorizontal= "true" and roid:layout_margintop= "210dip" android:src= "@drawable/ic_launcher"/> <button android:id= "@+id/btn_ Takephoto "android:layout_width=" wrap_content "android:layout_height=" Wrap_content "Android:layout_al Ignparentleft= "true" android:layout_alignparenttop= "true" android:text= "photographed"/> <button Andro Id:id= "@+id/btn_photos" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" Android        Oid:layout_alignparentright= "true"Android:layout_alignparenttop= "true" Android:text= "take from album"/></relativelayout> 

First I defined a very simple XML layout with two buttons and a imageview to display the Avatar:

Let me take a look at the Mainactivity code:

Package Com.example.changhead;import Java.io.file;import Java.io.filenotfoundexception;import Java.io.fileoutputstream;import Java.io.ioexception;import Android.net.uri;import Android.os.Bundle;import Android.os.environment;import Android.provider.mediastore;import Android.annotation.suppresslint;import Android.app.activity;import Android.content.intent;import Android.graphics.bitmap;import Android.graphics.bitmapfactory;import Android.graphics.drawable.bitmapdrawable;import Android.graphics.drawable.drawable;import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.button;import Android.widget.ImageView; @SuppressLint ("Sdcardpath") public class Mainactivity extends Activity implements Onclicklistener {private ImageView ivhead;//avatar Display private button btntakephoto;//Photo Private button btnphotos;//album private Bitmap head;//avatar bitmapprivate static String path= "/sdcard/myhead/";//SD path @overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (SavedinstanCestate); Setcontentview (R.layout.activity_main); Initview ();} private void Initview () {//Initialize control Btnphotos = (Button) Findviewbyid (r.id.btn_photos); Btntakephoto = (Button) Findviewbyid (R.id.btn_takephoto); Btnphotos.setonclicklistener (this), Btntakephoto.setonclicklistener (this); IvHead = ( ImageView) Findviewbyid (R.id.iv_head); Bitmap BT = bitmapfactory.decodefile (path + "head.jpg");//Find the Avatar from SD, convert it to BITMAPIF (bt!=null) {@SuppressWarnings (" Deprecation ") drawable drawable = new bitmapdrawable (BT);//Convert to Drawableivhead.setimagedrawable (drawable);} else{/** * If there is no SD inside you need to take the avatar from the server, retrieve the avatar and save in SD * * *}} @Overridepublic void OnClick (View v) {switch (V.getid ()) {case R.ID.BTN _photos://take photos from the album Intent intent1 = new Intent (Intent.action_pick, null); Intent1.setdataandtype ( MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*"); Startactivityforresult (intent1, 1); Break;case R.id.btn_ takephoto://call camera to take pictures Intent Intent2 = new Intent (mediastore.action_image_capture); Intent2.putextra (Mediastore.extra_ OUTPUT, Uri.fromfile (New FiLe (Environment.getexternalstoragedirectory (), "head.jpg")); Startactivityforresult (Intent2, 2);// Open break;default:break with Forresult;}}  protected void Onactivityresult (int requestcode, int resultcode, Intent data) {switch (requestcode) {case 1:if (ResultCode = = Result_ok) {Cropphoto (Data.getdata ());//Crop Picture}break;case 2:if (ResultCode = = RESULT_OK) {File temp = new file (environme Nt.getexternalstoragedirectory () + "/head.jpg"); Cropphoto (Uri.fromfile (temp));//Crop Picture}break;case 3:if (data! = NULL) { Bundle extras = Data.getextras (), head = extras.getparcelable ("Data"), if (head!=null) {/** * Upload server Code */setpictoview (head) ;//Save in SD card Ivhead.setimagebitmap (head);//show it with ImageView}}break;default:break;} Super.onactivityresult (Requestcode, ResultCode, data);};/ * * Call system clipping * @param uri */public void Cropphoto (Uri uri) {Intent Intent = new Intent ("Com.android.camera.action.CROP"); Ntent.setdataandtype (URI, "image/*"); Intent.putextra ("Crop", "true"); Aspectx Aspecty is a proportional Intent.putextra ("Aspectx", 1) of the wide height; intent.putExtra ("Aspecty", 1);//Outputx outputy is a cropped image with a wide height of Intent.putextra ("Outputx", and Intent.putextra); ("Outputy", 150); Intent.putextra ("Return-data", true); Startactivityforresult (Intent, 3);}          private void Setpictoview (Bitmap mbitmap) {String sdstatus = Environment.getexternalstoragestate ();             if (!sdstatus.equals (environment.media_mounted)) {//detects if SD is available for return; } FileOutputStream b = null; File File = new file (path); File.mkdirs ()//Create folder string FileName =path + "head.jpg";//Picture name try {b = new FileOutputStream (fi Lename) mbitmap.compress (Bitmap.CompressFormat.JPEG, b);//write data to file} catch (FileNotFoundException e) { E.printstacktrace ();} Finally {try {//Close stream B.flush (); B.close ();} catch (IOException e) {e.printstacktrace ();}}}}

Do not forget to add permissions:

<uses-permission android:name= "Android.permission.CAMERA"/><uses-permission android:name= " Android.permission.WRITE_EXTERNAL_STORAGE "/><uses-permission android:name=" android.permission.MOUNT_ Unmount_filesystems "/>

Implementation of "Android" Avatar replacement