Android Combat Simple Tutorial-28th gun (URI to string instance)

The next article. We can easily get the URI of the selected image, so how do we consider converting the obtained URI to a string-type address?

Then we will study it by example. Layout file and the previous (27 gun) Consistent, we will no longer list, directly to see Mainactivity.java:

Package Com.example.userphoto;import Java.io.file;import Android.app.activity;import android.content.intent;import Android.database.cursor;import Android.graphics.bitmap;import Android.graphics.drawable.bitmapdrawable;import Android.graphics.drawable.drawable;import Android.net.uri;import Android.os.bundle;import android.os.Environment; Import Android.provider.mediastore;import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.button;import Android.widget.imageview;import Android.widget.toast;import Cn.bmob.v3.Bmob;import Cn.bmob.v3.datatype.bmobfile;import Cn.bmob.v3.listener.uploadfilelistener;public class MainActivity extends Activity implements Onclicklistener {private static final int image_request_code = 0;private static final int camera_reque St_code = 1;private static final int resize_request_code = 2;private static final String image_file_name = "Header.jpg";p R Ivate ImageView mimageheader; @Overrideprotected void OnCreate (Bundle savedinstancestate){super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); Bmob.initialize (This, "8f3ffb2658d8a3366a70a0b0ca0b71b2");//Initialize Bmobsetupviews ();} private void Setupviews () {Mimageheader = (ImageView) Findviewbyid (R.id.image_header); final Button selectBtn1 = (Button) Findviewbyid (r.id.btn_selectimage); final Button selectBtn2 = (Button) Findviewbyid (R.id.btn_takephoto); Selectbtn1.setonclicklistener (this); Selectbtn2.setonclicklistener (this);} @Overridepublic void OnClick (View v) {switch (V.getid ()) {case R.id.btn_selectimage:intent galleryintent = new Intent (Int Ent. action_get_content); galleryintent.addcategory (intent.category_openable); Galleryintent.settype ("image/*");// Picture Startactivityforresult (Galleryintent, Image_request_code); Break;case r.id.btn_takephoto:if (isSdcardExisting ()) {Intent cameraintent = new Intent ("Android.media.action.IMAGE_CAPTURE");//Photo Cameraintent.putextra (Mediastore.extra _output, Getimageuri ()); Cameraintent.putextra (mediastore.extra_video_quality, 0); StartaCtivityforresult (Cameraintent, Camera_request_code);} else {Toast.maketext (V.getcontext (), "Please insert SD card", Toast.length_long). Show (); Break;}} @Overrideprotected void Onactivityresult (int requestcode, int resultcode, Intent data) {if (ResultCode! = RESULT_OK) {Retu RN;} else {switch (requestcode) {case Image_request_code:uri originaluri=data.getdata ();//Get Picture Uriresizeimage (Originaluri )///The following method converts the obtained URI to a string type Oh! String []imgs={mediastore.images.media.data};//Converts the picture URI to a storage path Cursor cursor=this.managedquery (Originaluri, IMGs,  NULL, NULL, NULL);  int Index=cursor.getcolumnindexorthrow (MediaStore.Images.Media.DATA);  Cursor.movetofirst ();  String img_url=cursor.getstring (index); Showtoast (Img_url); Break;case camera_request_code:if (Issdcardexisting ()) {Resizeimage (GetImageUri ());/*// Upload picture String imgpath = Getimageuri (); final bmobfile icon = new Bmobfile (new File (Imgpath)); Icon.upload (this, new UploadFile Listener () {@Overridepublic void onsuccess () {//TODO auto-generated method Stubperson person = new Person ();p Erson.seticon (icon);p erson.save (mainactivity.this) showtoast ("image upload succeeded");} @Overridepublic void OnProgress (Integer arg0) {//TODO auto-generated method stub} @Overridepublic void OnFailure (int arg0 , String arg1) {//TODO auto-generated method Stubshowtoast ("Picture upload failed:" +ARG1);}); */} else {Toast.maketext (mainactivity.this, "No memory card found, no photos saved!
 
 
", Toast.length_long). Show ();} Break;case resize_request_code:if (data = null) {showresizeimage (data);} Break;}} Super.onactivityresult (Requestcode, ResultCode, data);} private void Showtoast (String msg) {Toast.maketext (this, MSG, Toast.length_short). Show (); Private Boolean issdcardexisting () {//infers if the SD card has a final String state = Environment.getexternalstoragestate (); State.equals (environment.media_mounted)) {return true;} else {return false;}} public void Resizeimage (URI uri) {//Reshape picture size intent Intent = new Intent ("Com.android.camera.action.CROP"); Intent.setdataandtype (URI, "image/*"); Intent.putextra ("Crop", "true");//ability to crop Intent.putextra ("Aspectx", 1); Intent.putextra ("Aspecty", 1), Intent.putextra ("Outputx", "Intent.putextra"; Return-data ", true); Startactivityforresult (Intent, resize_request_code);} private void Showresizeimage (Intent data) {//Display picture Bundle extras = Data.getextras (); if (extras! = null) {Bitmap photo = Extr As.getparcelable ("Data");D rawable drawable = New bitmapdrawable (photo); mimageheader.setimagedrawable (drawable);}} Private Uri Getimageuri () {//Get path return Uri.fromfile (New File (Environment.getexternalstoragedirectory (), Image_file_ NAME));}}

To list the methods separately is:

                                Uri Originaluri=data.getdata ();//Get Picture Uriresizeimage (Originaluri);//The following method converts the obtained URI to a string type Oh! String []imgs={mediastore.images.media.data};//Converts the picture URI to the storage path  Cursor cursor=this.managedquery (Originaluri, IMGs, NULL, NULL, NULL);  int Index=cursor.getcolumnindexorthrow (MediaStore.Images.Media.DATA);  Cursor.movetofirst ();  String img_url=cursor.getstring (index);  Showtoast (Img_url);

The execution instance will appear for example the following error:

Do not understand English may also be able to understand, prompt permission is insufficient, we add such as the following permissions:

Execute the example and successfully pass:

The path to the picture is shown in the toast, so what's the use of getting the path? Take a look at the next article (29 shots).

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Android Easy Tutorial-28th gun (URI to string instance)