Android auto-focus photography

Android style and theme)

 

In Android, a topic is used to define the display style for an application. Its definition is the same as that for a style, as shown below:

<? Xmlversion = "1.0" encoding = "UTF-8"?>

<Resources>

<Stylename = "itcasttheme">

<Item name = "Android: windownotitle"> true </item> <! -No title.

<Item name = "Android: windowfullscreen">? Android: windownotitle </item> <! -Full Screen Display (à)

</Style>

</Resources>

Above "? The question mark in Android: windownotitle is used to reference the resource value defined in the current topic. The following code shows how to set the topic defined above in androidmanifest. xml:

<Applicationandroid: icon = "@ drawable/icon" Android: Label = "@ string/app_name"

Android: theme = "@ style/itcasttheme">

......

</Application>

In addition to setting a topic in androidmanifest. XML, you can also set a topic in the Code as follows:

Settheme (R. style.Itcasttheme );

 

 

Camera = camera.Open();

Windowmanager WM = (windowmanager) getsystemservice (context.Window_service);

DisplayDisplay= WM. getdefaultdisplay ();

Camera. parametersparameters = camera. getparameters ();

Parameters. setpreviewsize (320,240); // you can specify the preview size.

// Parameters. setpreviewframerate (3); // three frames per second

Parameters. setpictureformat (pixelformat.JPEG); // Set the photo output format

Parameters. Set ("Jpeg-quality", 85); // photo quality

Parameters. setpicturesize (320,240); // you can specify the Photo size.

Camera. setparameters (parameters );

Camera. setpreviewdisplay (surfaceview. getholder (); // you can use surfaceview to view the video.

Camera. startpreview (); // start previewing

 

 

 

Camera. autofocus (null); // auto focus

 

Photo response

Private final classTakepicturecallback
ImplementsPicturecallback {

@ Override

Public voidOnpicturetaken (Byte[] Data, camera ){

Try{

Bitmap bitmap = bitmapfactory.Decodebytearray(Data, 0, Data. Length );

File file =NewFile (environment.Getexternalstoragedirectory(), System.Currenttimemillis() + ". Jpg ");

Fileoutputstream outstream =NewFileoutputstream (File );

Bitmap. Compress (compressformat.JPEG, 100, outstream );

Outstream. Close ();

Camera. stoppreview ();

Camera. startpreview (); // start previewing

}Catch(Exception e ){

Log.E(Tag, E. tostring ());

}

}

}