About resolving an issue where you can't cut pictures and can't load pictures after selecting them from a photo album

Program Analysis:

Two main parts

(1) Take pictures first, then cut them and show them at last. (2) Select a photo from the album to cut it and show it

Code refers to the first line of code, the Book Code Runtime (2) a problem, cannot cut the picture and cannot load the picture

The Mainactivity.java code is as follows:

1  Packagecom.example.lynn.choosepictest;2 3 Importandroid.content.Intent;4 ImportAndroid.graphics.Bitmap;5 Importandroid.graphics.BitmapFactory;6 ImportAndroid.net.Uri;7 Importandroid.os.Environment;8 ImportAndroid.provider.MediaStore;9 Importandroid.support.v7.app.AppCompatActivity;Ten ImportAndroid.os.Bundle; One ImportAndroid.util.Log; A ImportAndroid.view.View; - ImportAndroid.widget.Button; - ImportAndroid.widget.ImageView; the  - ImportJava.io.File; - Importjava.io.FileNotFoundException; -  +  Public classMainactivityextendsappcompatactivity { -  +      Public Static Final intTake_photo = 1; A      Public Static Final intCrop_photo = 2; at     PrivateButton takepic; -     PrivateButton choosebtn; -     PrivateImageView picture; -     PrivateUri Imageuri; -  - @Override in     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); to Setcontentview (r.layout.activity_main); +Takepic =(Button) Findviewbyid (r.id.take_pic); -CHOOSEBTN =(Button) Findviewbyid (r.id.choose_from_album); the  *Choosebtn.setonclicklistener (NewView.onclicklistener () { $ @OverridePanax Notoginseng              Public voidOnClick (View v) { -File Outputimage =NewFile (environment.getexternalstoragedirectory () the, "Output_image.jpg"); +                 Try { A                     if(Outputimage.exists ()) { the Outputimage.delete (); +                     } - outputimage.createnewfile (); $}Catch(Exception e) { $ e.printstacktrace (); -                 } -  theImageuri =Uri.fromfile (outputimage); -Intent Intent =NewIntent ("Android.intent.action.PICK");WuyiIntent.settype ("image/*"); theIntent.putextra ("Crop",true); -Intent.putextra ("scale",true); Wu                //Intent.putextra (Mediastore.extra_output,imageuri); -                              //This code in the book does not run, indicating that the selected picture Imageuri not pass through, or that is empty!  AboutStartactivityforresult (Intent, Take_photo);//parameter Transmission Take_photo $             } -         }); -  -Takepic.setonclicklistener (NewView.onclicklistener () { A @Override +              Public voidOnClick (View v) { the  -File Outputimage =NewFile (Environment.getexternalstoragedirectory (), "Tempimage.jpg"); $                 Try { the                     if(Outputimage.exists ()) { the Outputimage.delete (); the                     } the outputimage.createnewfile (); -}Catch(Exception e) { in e.printstacktrace (); the                 } theImageuri =Uri.fromfile (outputimage); AboutIntent Intent =NewIntent ("Android.media.action.IMAGE_CAPTURE"); the Intent.putextra (Mediastore.extra_output, Imageuri); theStartactivityforresult (Intent, Take_photo);//Start the camera program the  +             } -         }); the     }Bayi  the @Override the     protected voidOnactivityresult (intRequestcode,intResultCode, Intent data) { -  -         Switch(requestcode) { the             //cropping work the              CaseTake_photo: the                the                 if(ResultCode = =RESULT_OK) { -                     if(Data! =NULL) { theImageuri = Data.getdata ();//The key to this sentence is that after you select the picture, the Imageuri does not take a value, so here 's the value the                    }       theLOG.E ("TAG", "Take_photo");94Intent intent1 =NewIntent ("Com.android.camera.action.CROP"); theIntent1.setdataandtype (Imageuri, "image/*"); theIntent1.putextra ("scale",true); the Intent1.putextra (Mediastore.extra_output, Imageuri);98 Startactivityforresult (Intent1, Crop_photo); About                 } -                  Break;101 102             103             //Show Pictures104              CaseCrop_photo: the                 if(ResultCode = =RESULT_OK) {106                     Try {107Bitmap Bitmap =Bitmapfactory.decodestream (108 Getcontentresolver ()109 . Openinputstream (Imageuri)); the Picture.setimagebitmap (bitmap);111}Catch(FileNotFoundException e) { the e.printstacktrace ();113                     } the                 } the                  Break; the             default:117                  Break;118         }119     } -}

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About resolving images that cannot be clipped after selecting photos from an album and cannot load pictures