Sample code of image zoom in, zoom out and rotation function in Android

• Android

1、 Introduction

2、 Method

1) Set picture zoom in and out effect

Step 1: set Android: scaletype in < ImageView > tag to "fitcenter"

Step 2: get the width of the screen

Step 3: set the maximum progress value of seekbar to the screen width

Step 4: set the layout parameters of ImageView, that is, width and height, that is, the width and height of the canvas

2) Set picture rotation method

Step 1: set the angle of the matrix for the new bitmap

Step 2: get the bitmap resource

Step 3: rebuild the bitmap for display

Step 4: set a new bitmap for ImageView

3、 Code example

design sketch:

Effect drawing of setting size and rotation

code:

fry.Activity02

activity02.xml

4、 Harvest

1. Set image center display

summary

The above is the sample code of the image view zoom in, zoom out and rotation function in Android introduced by Xiaobian. I hope it will be helpful to you. If you have any questions, please leave me a message and Xiaobian will reply to you in time. Thank you very much for your support for the programming tips website!

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