Picture rotation in Android

Activity_main.xml file Configuration

<LinearLayoutxmlns: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"Android:paddingbottom= "@dimen/activity_vertical_margin"Android:paddingleft= "@dimen/activity_horizontal_margin"Android:paddingright= "@dimen/activity_horizontal_margin"Android:paddingtop= "@dimen/activity_vertical_margin"android:orientation= "vertical"Tools:context=". Mainactivity " >    <ImageViewAndroid:id= "@+id/iv_src"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content" />    <ImageViewAndroid:id= "@+id/iv_rotate"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content" /></LinearLayout>

Mainactivity.java Code

1  PackageCom.imagerotota.view;2 3 Importandroid.app.Activity;4 ImportAndroid.graphics.Bitmap;5 Importandroid.graphics.BitmapFactory;6 ImportAndroid.graphics.Canvas;7 ImportAndroid.graphics.Matrix;8 ImportAndroid.graphics.Paint;9 ImportAndroid.os.Bundle;Ten ImportAndroid.os.SystemClock; One ImportAndroid.widget.ImageView; A  -  Public classMainactivityextendsActivity { -  the     PrivateImageView ivsrc; -     PrivateImageView ivratate; -  - @Override +     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); + Setcontentview (r.layout.activity_main); A         //get the corresponding control in the picture atIVSRC =(ImageView) Findviewbyid (R.ID.IV_SRC); -Ivratate =(ImageView) Findviewbyid (r.id.iv_rotate); -         //convert src.jpg pictures to bitmap -         FinalBitmap Srcbitmap =Bitmapfactory.decoderesource (Getresources (), r.drawable.src); -         //in the original bitmap can not modify the picture, can only copy the picture to modify -         //Srcbitmap.setpixel (+, color.red);//This modification is not valid in         //displays the acquired picture in the IVSRC control - Ivsrc.setimagebitmap (srcbitmap); to  +         //Create a new thread to rotate the picture in the process -         NewThread () { the             intdegrees = 0; *              Public voidrun () { $                  while(true){Panax NotoginsengDegrees + = 5; -                     //every time you rotate a picture, you re-copy the original, reset the brush, and so on, or you can change it after the copied image . the                         //Copy the original picture +                         FinalBitmap Copybitmap =Bitmap.createbitmap (Srcbitmap.getwidth (), A srcbitmap.getheight (), Srcbitmap.getconfig ()); the                         //Create a replenishment with canvas to Copybitmap as a template +                         FinalCanvas Canvas =NewCanvas (copybitmap); -                         //Create a brush $                         FinalPaint paint =NewPaint (); $                         //Create a Matrix object -                         FinalMatrix Matrix =NewMatrix (); -                      the                      //rotate a picture -Matrix.setrotate (degrees, Srcbitmap.getwidth ()/2, Srcbitmap.getheight ()/2);Wuyi Canvas.drawbitmap (Srcbitmap,matrix, paint); the                     //☆ Note that the activity page UI cannot be updated directly in the child thread -Runonuithread (NewRunnable () { Wu                          Public voidrun () { -                             //put the modified picture into the relevant ivratate control About Ivratate.setimagebitmap (copybitmap); $                         } -                     }); -                     //let the thread sleep for a second and then continue execution -Systemclock.sleep (1000); A                 } +             } the }.start (); the     } the}

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Picture rotation in Android