How to zoom in and out bitmap instance code in Android

CopyCodeThe Code is as follows:/** bitmap Amplification Method */ Private Static bitmap big (Bitmap bitmap ){ Matrix matrix = new matrix (); Matrix. postscale (1.5f, 1.5f); // The ratio of length to width to zoom in or out. Bitmap resizebmp =

How to delete image instances in Android Gallery

CopyCodeThe Code is as follows:/* long-Press the image in Gallery to delete the image */ Gallery. setonitemlongclicklistener (New onitemlongclicklistener (){ @ OverridePublic Boolean onitemlongclick (adapterview Arg0, view arg1,Final int arg2,

How to disable the camera sound of camera in mute mode in android

There are unwritten rules in the industry that phone companies must have a prompt when they click the photo and video keys for camera. Therefore, google also put the function of playing the photo sound in the cameraService to prevent developers from

Android obtains the path (URL) of the selected image in the SD card.

Recently, I am working on an image upload function. I need to provide the path for uploading images to the SD card. I have read some examples on the Internet. The code is very simple after debugging. The layout file is as follows: Copy codeThe Code

Android draws and saves the specific implementation code of the image

Canvas is a Canvas. You can create a blank Canvas and create a new Canvas object without parameters. You can also use BitmapFactory to create a Bitmap object as a parameter for the new Canvas object. That is to say, the Canvas is not blank, If you

Android reads Assets image resources and saves them to SD card instances.

Copy codeThe Code is as follows: public class ReadBitmap { Public void readByte (Context c, String name, int indexInt ){ Byte [] B = null; Int [] intArrat = c. getResources (). getIntArray (indexInt ); Try { AssetManager am = null; Am = c. getAssets

Parse the interaction between webview and js in Android

1. Use webview in android to call js Code on the webpage.In Android, you can use webview to achieve interaction with js. To call js Code in a program, you only need to set the attributes of the webview control that support js to true ,, then, you

How to set the position and transparency in the android dialog box

For example, the upper or lower part of the screen. To achieve this effect. You need to obtain the Window object of the dialog box. There are multiple methods to obtain the Window object. The easiest way is to directly obtain the Window object

Display various effects of Activity jump animations for Android

As we all know when using the native UI of Android, the Android Activity jump is a very hardware switching interface. In fact, you can set various animations for Android Activity jump. The following shows the effect:   The implementation is very

Example of using Android custom shape

MainActivity is as follows: Copy codeThe Code is as follows: package cn. testshape; Import android. OS. Bundle; Import android. app. Activity; /** * Demo description: * Use of custom shapes */ Public class MainActivity extends Activity { @

Introduction to main resource files and folders in Android

In the Android project folder, the main resource files are stored in the res folder. 1: The assets folder is a native file that is not compiled and processed, that is, the files in this folder are not like xml, java files are pre-compiled, and some

How to obtain data from webpage forms in Android

MainActivity is as follows: Copy codeThe Code is as follows: package cn. testjavascript; Import java. util. StringTokenizer; Import android. OS. Bundle; Import android. webkit. WebView; Import android. app. Activity; /** * Demo description: * Get

How to Implement the android http-post method example

Copy codeThe Code is as follows: package com. hl; Import java. io. BufferedReader;Import java. io. IOException;Import java. io. InputStream;Import java. io. InputStreamReader;Import java. util. ArrayList;Import java. util. HashMap;Import java. util.

Android multi-touch Image Scaling

Layout: Copy codeThe Code is as follows: Android: id = "@ + id/relativeLayout1" Android: layout_width = "fill_parent" Android: layout_height = "fill_parent"> Android: id = "@ + id/zoom_in"Android: layout_width = "wrap_content"Android:

Android image operation (scaling and moving) instance code

View_show.xml Copy codeThe Code is as follows: Xmlns: android = "http://schemas.android.com/apk/res/android" Android: orientation = "vertical" Android: layout_width = "match_parent" Android: layout_height = "match_parent"> Android: layout_height =

Canvas for Android Game Development

Canvas. In English, this word indicates Canvas. In Android, Canvas is used as a Canvas. We can draw anything we want on the Canvas with the help of the Set Paint class; it is also the core class of the Bitmap class. You can also set Canvas

Simple code for obtaining the Root permission in Android

We know that the Android mobile phone operating system uses the Linux kernel, and the highest system permission in Linux is Root, which is similar to the Administrator privilege in Windows, that is, the highest privilege in the operating system.

Android saves Bitmap images to a specified folder

Copy codeThe Code is as follows:/** save Method */ Public void saveBitmap (){ Log. e (TAG, "Save image "); File f = new File ("/sdcard/namecard/", picName ); If (f. exists ()){ F. delete (); } Try { FileOutputStream out = new

Android obtains images in drawable by name through reflection

MainActivity is as follows: Copy codeThe Code is as follows: package cn. testreflect; Import java. lang. reflect. Field; Import android. OS. Bundle; Import android. widget. ImageView; Import android. app. Activity; /** * Demo description: * Obtain

Custom ContentProvider instance in Android

// TestBaidu MainActivity is as follows: Copy codeThe Code is as follows: package cn. testbaidu; Import android.net. Uri; Import android. OS. Bundle; Import android. view. View; Import android. view. View. OnClickListener; Import android. widget.

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