[Android] Camera sample code

Origin

This is an example of photography, which can be previewed or archived.

One of the functions of the application that we were going to do when we first took part in a competition. Unfortunately, the competition failed, but we still made it a complete example.

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Code

package com.clouddemo.cameratest;import java.io.File;import java.io.FileOutputStream;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.Date;import android.content.ContentResolver;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.hardware.Camera;import android.hardware.Camera.PictureCallback;import android.hardware.Camera.ShutterCallback;import android.os.Environment;import android.provider.MediaStore;import android.util.Log;import android.view.Display;import android.view.Surface;import android.view.SurfaceHolder;import android.view.WindowManager;public class CBCamera {static CBCamera m_instance;static final String TAG = "CameraDemo";Camera m_camera;WindowManager m_windowManager;ContentResolver m_contentResolver;public static CBCamera instance(){if(m_instance == null){m_instance = new CBCamera();}return m_instance;}private CBCamera(){open();}public void setWindowManager(WindowManager windowManager){m_windowManager = windowManager;}public void setContentResolver(ContentResolver contentResolver){m_contentResolver = contentResolver;}public void initialPreview(SurfaceHolder holder){try{if(m_camera != null){m_camera.setPreviewDisplay(holder);}}catch(Exception ex){ex.printStackTrace();}}public void startPreview(int width, int height){if(m_camera != null){Camera.Parameters parameters = m_camera.getParameters();Display display = m_windowManager.getDefaultDisplay();        if(display.getRotation() == Surface.ROTATION_0)        {            parameters.setPreviewSize(height, width);                                       m_camera.setDisplayOrientation(90);        }        if(display.getRotation() == Surface.ROTATION_90)        {            parameters.setPreviewSize(width, height);                                   }        if(display.getRotation() == Surface.ROTATION_180)        {            parameters.setPreviewSize(height, width);                       }        if(display.getRotation() == Surface.ROTATION_270)        {            parameters.setPreviewSize(width, height);            m_camera.setDisplayOrientation(180);        }        //parameters.setPreviewSize(width, height);        m_camera.setParameters(parameters);        m_camera.startPreview();}}public void stopPreview(){if(m_camera != null){m_camera.stopPreview();}}public void takePicture(){if(m_camera != null)m_camera.takePicture(shutterCallback, rawCallback, jpegCallback);}public void open(){if(m_camera == null)m_camera = Camera.open();}public void release(){if(m_camera != null){m_camera.release();m_camera = null;}}ShutterCallback shutterCallback = new ShutterCallback() {public void onShutter() {Log.d(TAG, "onShutter'd");}};/** Handles data for raw picture */PictureCallback rawCallback = new PictureCallback() {public void onPictureTaken(byte[] data, Camera camera) {Log.d(TAG, "onPictureTaken - raw");}};/** Handles data for jpeg picture */PictureCallback jpegCallback = new PictureCallback() {public void onPictureTaken(byte[] data, Camera camera) {try{Bitmap bitmapPicture = BitmapFactory.decodeByteArray(data, 0, data.length);String path = Environment.getExternalStorageDirectory().toString();String filename;                Date date = new Date(0);                SimpleDateFormat sdf = new SimpleDateFormat ("yyyyMMddHHmmss");                filename =  sdf.format(date);OutputStream fOut = null;                //File file = new File(path, "/DCIM/"+filename+".jpg");File file = new File(path, "/"+filename+".jpg");                fOut = new FileOutputStream(file);//FileOutputStream out = new FileOutputStream(String.format("/sdcard/DCIM/Signatures/%d.jpg", System.currentTimeMillis()));bitmapPicture.compress(Bitmap.CompressFormat.JPEG, 0, fOut);fOut.flush();fOut.close();MediaStore.Images.Media.insertImage(m_contentResolver,file.getAbsolutePath(),file.getName(),file.getName());}catch(Exception ex){ex.printStackTrace();}finally{camera.startPreview();}Log.d(TAG, "onPictureTaken - jpeg");}};}