android rear view camera

general view. There is a textureview.setalpha (1.0f), the default does not write this sentence, its alpha is also 1.0f, that is, opaque. If you set it to transparent 0.0f, you can see nothing, which is just the opposite of Surfaceview.Surfaceview Surfaceholder generally want to set a transparent that is transparent. But Textureview because it is a view, no matter what a PNG photo transparency set to 0 must

caveats:1, Textureview is the Android 4.0 after the addition of the lower version of this class. Textureview must work in an environment where hardware acceleration is enabled, in the settings of the activity in the configuration file: Android:hardwareaccelerated= "True" is the default property, so no more writing is required. But if you write false, you can see Onsurfacetextureavailable () This callback will not come in, Textureview no surfacetextur

1.In the oncreate method: 1.1Call the getpreferredcameraid () method. In this method, the combopreferences object is added, which is used to manageProgramThe configuration file generated in the package name. After obtaining this object, some configurations are initialized. Then read the camera ID mcameraid from the configuration file and call util. the getcamerafacingintentextras (this) method is obtained through "

Create a preview classTo allow users to effectively obtain images and videos, they must be able to see images in the camera. A camera preview class is a SurfaceView class that can display Real-Time Images in the camera, so users can frame and capture images or videos. The Code in the following example demonstrates how to create a basic

In the past two days, after programming the android camera module and setting various parameters, we found that during previewing, the photos were reversed, rather than up or down, but 90 °. My mobile phone is Huawei u9200 and I used android4.0.3. Later I saw fuse (90), and then the preview was normal. However, the photos are still skewed when they are opened on the computer. Tilted 90 °, and then added thi

related documents. 2. simulator settings Because the mobile phone comes with a camera, you can directly use the camera function. However, if you want to test your program in the simulator, you can use the Front Camera to simulate it in the simulator. Is the simulator parameter setting interface of Android 4.4.2 (Api 1

Android watermark camera and android watermark The watermark camera implemented in this article is similar to the watermark camera function in the QQ space. Because I have read a demo to implement a simple watermark camera functio

the coordinate system in this transformation. In Android, the default view coordinate system is the upper-left vertex (0, 0), the x-axis, and the y-axis. This requires that the rect coordinate be transformed. Another difficulty is that this face detection must be started after the camera is turned on, and if you take a photo or stop the preview, you need to acti

, data); if (requestcode==10) {Toast.maketext (this, "photo successful", 0). Show (); }if (requestcode==20) {Toast.maketext (this, "camera success", 0). Show (); }} public void video (View v) {Intent Intent = new Intent (); Intent.setaction (mediastore.action_video_capture); Intent.putextra (Mediastore.extra_output, Uri.fromfile (New File (Environment.getexternalstoragedirectory (), " HAHA.3G

following example demonstrates how to create a basic Camera preview class that can be included in the View layout. To capture the Callback events for creating and destroying views, this class implements the SurfaceHolder. Callback interface, which is used to match the preview input of Camera: /** A basic Camera previe

1.Use surfaceviewControl to display the captured image of the camera Android: layout_width = "fill_parent"Android: layout_height = "240dip"Android: Id = "@ + ID/surfaceview"/> 2.Details /*Obtain surfaceviewControl */ SurfaceviewSurfaceview = (surfaceview) This. findviewbyid (R. Id. surfaceview ); /*Set resolution */ S

following figure shows the effect of this demo (getting an image from a local album and taking an image from a camera ): The simple layout file is not described here. In this experiment, the camera and local album are called using an implicit intent. You can still call it without adding permissions to the configuration list. The java implementation code is as follows: 1 import

The following tool class is used to simplify and optimize the common Photo Taking methods to achieve no preview. Import java. io. file; import java. io. fileOutputStream; import java. io. IOException; import java. text. simpleDateFormat; import java. util. date; import android. annotation. suppressLint; import android. annotation. targetApi; import android. app.

. code structure of Android camera The camera code of Android is mainly in the following directory:Java section of cameraPackages/apps/camera /. Camera. Java is the main implementation file. The goal is camera.apk.The com.

Almost every app will use the camera function, the following small series to share the content of the cloud Habitat Community Platform for your reference, interested friends to study together! Two ways to start a camera 1. Direct Boot System camera Or specify a name to return the picture Mcurrentphotofile 2. Custom Launch

canvas= Sfholder.lockcanvas (); Canvas.drawbitmap (bitmap, 0,0, null); Sfholder.unlockcanvasandpost (canvas); Camera.stoppreview (); Camera.startpreview (); catch (Exception e) {e.printstacktrace (); } } } This way, you can get the code, you can save the data, but for how to focus automatically, do not know how to control, for how to zoom in or zoom out of the preview of the picture is not clear, check the API also did not find, but this way, in the

; import android. view. surfaceHolder; import android. view. surfaceView; import android. view. window; import android. view. windowManager;

the HAL layer, the HAL layer in the maintenance cache queue, when receiving the inverted take_picture command to obtain a frame cache data, for transcoding, and then take the normal picture of the process of using @link Android.hardware.Camera.PictureCallback notifies the application layer of the data being photographed. Android5.0 implementation for 2 steps and 3 steps are implemented in the application layer, the application layer at the start of the preview to the HAL layer to pass 2 surface

Original: Android Camera2 photo (iii)--toggle camera, time lapse and flash mode First, switch the cameraTo switch between the front and rear cameras, you first need to close the previously opened camera, turn off preview, then reopen the new camera and reopen preview.pub

In Android, there are two ways to use a camera to take photos, one is to call the system's own camera, the other is to write a camera interface. We want to add the following permissions: 1. Call System Camera The main steps to invoke the