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package com.donnemartin.android.notes.notes; /* w w w.jav a 2 s . c o m*/ import android.annotation.TargetApi; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.hardware.Camera; import android.os.Build; import android.os.Bundle; import android.support.v4.app.Fragment; import android.util.Log; import android.view.*; import android.widget.Button; import java.io.FileOutputStream; import java.io.IOException; import java.util.List; import java.util.UUID; public class NoteCameraFragment extends Fragment { private static final String TAG = "NoteCameraFragment"; public static final String EXTRA_PHOTO_FILENAME = "com.donnemartin.android.notes.photo_filename"; private Camera mCamera; private SurfaceView mSurfaceview; private View mProgressContainer; private Camera.ShutterCallback mShutterCallback = new Camera.ShutterCallback() { public void onShutter() { // Display the progress indicator mProgressContainer.setVisibility(View.VISIBLE); } }; private Camera.PictureCallback mJpegCallBack = new Camera.PictureCallback() { public void onPictureTaken(byte[] dataJpeg, Camera camera) { String fileName = UUID.randomUUID().toString() + ".jpg"; FileOutputStream os = null; boolean success = true; try { os = getActivity().openFileOutput(fileName, Context.MODE_PRIVATE); os.write(dataJpeg); } catch (Exception e) { Log.e(TAG, "Error writing to file " + fileName, e); success = false; } finally { try { if (os != null) { os.close(); } } catch (Exception e) { Log.e(TAG, "Error closing file " + fileName, e); success = false; } } if (success) { // Set the photo filename on the result intent if (success) { Intent intent = new Intent(); intent.putExtra(EXTRA_PHOTO_FILENAME, fileName); getActivity().setResult(Activity.RESULT_OK, intent); } else { getActivity().setResult(Activity.RESULT_CANCELED); } } getActivity().finish(); } }; @SuppressWarnings("deprecation") @Override public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_note_camera, parent, false); Button takePictureButton = (Button)view .findViewById(R.id.note_camera_takePictureButton); takePictureButton.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { if (mCamera != null) { mCamera.takePicture(mShutterCallback, null, mJpegCallBack); } } }); mSurfaceview = (SurfaceView)view .findViewById(R.id.note_camera_surfaceView); SurfaceHolder holder = mSurfaceview.getHolder(); // Both setType() and SURFACE_TYPE_PUSH_BUFFERS are deprecated // but are both required for Camera preview to work on pre-3.0 devices holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); holder.addCallback(new SurfaceHolder.Callback() { public void surfaceCreated(SurfaceHolder holder) { // Tell the camera to use this surface as its preview area // Connect the surface with its client the camera try { if (mCamera != null) { mCamera.setPreviewDisplay(holder); } } catch (IOException exception) { Log.e(TAG, "Error setting up preview display", exception); } } public void surfaceDestroyed(SurfaceHolder holder) { // Called when the SurfaceView is removed from the screen // We can no longer display on this surface, so stop the preview if (mCamera != null) { // Stop drawing frames on the surface mCamera.stopPreview(); } } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { // Called when the surface is being displayed for the first time // Tell the surface's client how big the drawing will be if (mCamera != null) { // The surface changed size; update the camera preview size Camera.Parameters params = mCamera.getParameters(); Camera.Size size = getOptimalPreviewSize(params.getSupportedPreviewSizes(), width, height); params.setPreviewSize(size.width, size.height); size = getOptimalPreviewSize(params.getSupportedPictureSizes(), width, height); params.setPictureSize(size.width, size.height); List<String> focusModes = params.getSupportedFocusModes(); if (focusModes .contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) { params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO); } mCamera.setParameters(params); try { // Start drawing frames on the surface mCamera.startPreview(); } catch (Exception e) { Log.e(TAG, "Could not start preview", e); mCamera.release(); mCamera = null; } } } }); mProgressContainer = view.findViewById(R.id.note_camera_progressContainer); mProgressContainer.setVisibility(View.INVISIBLE); return view; } @TargetApi(9) @Override public void onResume() { super.onResume(); // TODO: Opening camera on the main thread, use multi-threading instead if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) { // Open the first camera, which is usually the rear-facing // camera, or the front facing camera if there is no rear mCamera = Camera.open(0); } else { mCamera = Camera.open(); } } @Override public void onPause() { super.onPause(); if (mCamera != null) { mCamera.release(); mCamera = null; } } private Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) { // Taken from CameraPreview.java in the ApiDemos Android sample app final double ASPECT_TOLERANCE = 0.1; double targetRatio = (double) w / h; if (sizes == null) { return null; } Camera.Size optimalSize = null; double minDiff = Double.MAX_VALUE; int targetHeight = h; // Try to find an size match aspect ratio and size for (Camera.Size size : sizes) { double ratio = (double) size.width / size.height; if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) { continue; } if (Math.abs(size.height - targetHeight) < minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } // Cannot find the one match the aspect ratio, ignore the requirement if (optimalSize == null) { minDiff = Double.MAX_VALUE; for (Camera.Size size : sizes) { if (Math.abs(size.height - targetHeight) < minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } } return optimalSize; } }