zooming, rotating, and panning of pictures

1. View

1 <LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"2 Xmlns:tools= "Http://schemas.android.com/tools"3 Android:layout_width= "Match_parent"4 Android:layout_height= "Match_parent"5 android:orientation= "vertical"6 Tools:context=". Mainactivity " >7 8     <ImageView9         Android:id= "@+id/iv_1"Ten Android:layout_width= "Wrap_content" One Android:layout_height= "Wrap_content" A         /> -      -     <ImageView the         Android:id= "@+id/iv_2" - Android:layout_width= "Wrap_content" - Android:layout_height= "Wrap_content" -          /> +  - </LinearLayout>

2. Code

1  Packagecom.example.imageresize;2 3 ImportAndroid.os.Bundle;4 Importandroid.app.Activity;5 ImportAndroid.graphics.Bitmap;6 Importandroid.graphics.BitmapFactory;7 ImportAndroid.graphics.Canvas;8 ImportAndroid.graphics.Color;9 ImportAndroid.graphics.Matrix;Ten ImportAndroid.graphics.Paint; One ImportAndroid.view.Menu; A ImportAndroid.widget.ImageView; -  -  Public classMainactivityextendsActivity { the  -     PrivateImageView iv_1; -     PrivateImageView iv_2; - @Override +     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); + Setcontentview (r.layout.activity_main); A          atIv_1 =(ImageView) Findviewbyid (r.id.iv_1); -Iv_2 =(ImageView) Findviewbyid (r.id.iv_2); -          -Bitmap Bitmap1 =Bitmapfactory.decoderesource (Getresources (), r.drawable.ic_launcher); - Iv_1.setimagebitmap (BITMAP1); -          inBitmap Alterbitmap = Bitmap.createbitmap (bitmap1.getwidth () + Ten, bitmap1.getheight () + 10, Bitmap1.getconfig ()); -Canvas Canvas =NewCanvas (alterbitmap); toPaint paint =NewPaint (); + Paint.setcolor (color.black); -Matrix Matrix =NewMatrix (); the         /*************** Picture Scaling code start******************/ *         //Note the x-axis and y-axis scaling $        /*matrix.setvalues (New float[]{Panax Notoginseng 2.0f,0,1, - 0,1,0, the 0,0,1 +         });*/ A         //Matrix.setscale (2.0f, 1); the         /*************** Picture Scaling code end******************/ +         //matrix.setrotate (Bitmap1.getwidth ()/2, Bitmap1.getheight ()/2); -         //Matrix.setrotate (a); $         /*********** Mirror Effect start*************/ $Matrix.setscale (-1, 1); -Matrix.posttranslate (Bitmap1.getwidth (), 0);//This setting is panning -         /*********** Mirror Effect end*************/ the         //Matrix.settranslate (ten);//x and y axes move 10 pixels -         //draw into the canvas with Bitmap1 as a templateWuyi Canvas.drawbitmap (Bitmap1, Matrix, paint); the Iv_2.setimagebitmap (alterbitmap); -     } Wu  -  About      $}

zooming, rotating, and panning of pictures