Java tutorial
package com.example.user.lstapp; /* * Copyright (c) 2014 Rex St. John on behalf of AirPair.com * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Matrix; import android.hardware.Camera; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.support.v4.content.CursorLoader; import android.util.Log; import android.view.LayoutInflater; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.EditText; import android.widget.ImageView; import android.widget.Toast; import com.ut.mpc.utils.STRegion; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; /** * Take a picture directly from inside the app using this fragment. * * Reference: http://developer.android.com/training/camera/cameradirect.html * Reference: http://stackoverflow.com/questions/7942378/android-camera-will-not-work-startpreview-fails * Reference: http://stackoverflow.com/questions/10913181/camera-preview-is-not-restarting * * Created by Rex St. John (on behalf of AirPair.com) on 3/4/14. */ public class CreatePlaceFragment extends BaseFragment { private static final String ARG_PARAM1 = "param1"; private static String TAG = "LST"; private SurfaceHolder surfaceHolder; private Camera camera; private boolean previewOn; private final static int CAMERA_FPS = 5000; protected SharedPreferences sharedPrefs; protected String uploadUrl; private ImageView poster; private SurfaceView camPreview; protected Button createButton; protected Button cameraButton; protected Button storageButton; protected Boolean previewMode = false; protected EditText placeTitle; protected String posterPath; protected STRegion placeBounds; private static final int SELECT_PHOTO = 101; private CreatePlaceFragmentDoneListener mListener; /** * Use this factory method to create a new instance of * this fragment using the provided parameters. * * @param param1 Parameter 1. * @param param2 Parameter 2. * @return A new instance of fragment CreatePlaceFragment. */ // TODO: Rename and change types and number of parameters public static CreatePlaceFragment newInstance(String boundsObjAsString) { CreatePlaceFragment fragment = new CreatePlaceFragment(); Bundle args = new Bundle(); args.putString(ARG_PARAM1, boundsObjAsString); fragment.setArguments(args); return fragment; } public CreatePlaceFragment() { // Required empty public constructor } /** * This interface must be implemented by activities that contain this * fragment to allow an interaction in this fragment to be communicated * to the activity and potentially other fragments contained in that * activity. * <p/> * See the Android Training lesson <a href= * "http://developer.android.com/training/basics/fragments/communicating.html" * >Communicating with Other Fragments</a> for more information. */ public interface CreatePlaceFragmentDoneListener { public void onFragmentDone(); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (getArguments() != null) { String boundsObjAsString = getArguments().getString(ARG_PARAM1); placeBounds = STRegion.fromString(boundsObjAsString); System.out.println(placeBounds); } } @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mListener = (CreatePlaceFragmentDoneListener) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement PlacesFragmentInteractionListener"); } } @Override public void onDetach() { super.onDetach(); cleanupCamera(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_native_camera, container, false); //capture ui elements this.poster = (ImageView) view.findViewById(R.id.place_poster); this.camPreview = (SurfaceView) view.findViewById(R.id.camPreview); this.cameraButton = (Button) view.findViewById(R.id.button_camera); this.storageButton = (Button) view.findViewById(R.id.button_storage); this.createButton = (Button) view.findViewById(R.id.button_create); this.placeTitle = (EditText) view.findViewById(R.id.place_title); //setup ui elements this.cameraButton.setOnClickListener(cameraListener); this.storageButton.setOnClickListener(storageListener); this.createButton.setOnClickListener(createListener); setupPreview(); return view; } Button.OnClickListener cameraListener = new Button.OnClickListener() { public void onClick(View v) { if (CreatePlaceFragment.this.previewMode) { Log.d(TAG, "Taking picture"); camera.takePicture(null, null, myPictureCallback_JPG); CreatePlaceFragment.this.previewMode = false; } else { Log.d(TAG, "Resetting to preview mode"); poster.setVisibility(View.INVISIBLE); camPreview.setVisibility(View.VISIBLE); camera.startPreview(); CreatePlaceFragment.this.previewMode = true; } //camera.stopPreview(); //camera.release(); //previewOn = false; // Don't release the camera in surfaceDestroyed() } }; Button.OnClickListener storageListener = new Button.OnClickListener() { public void onClick(View v) { Intent photoPickerIntent = new Intent(Intent.ACTION_PICK); photoPickerIntent.setType("image/*"); startActivityForResult(photoPickerIntent, SELECT_PHOTO); } }; Button.OnClickListener createListener = new Button.OnClickListener() { public void onClick(View v) { HomeActivity activity = (HomeActivity) getActivity(); SharedPreferences sharedpreferences = activity.getSharedPreferences("Places", Context.MODE_PRIVATE); SharedPreferences.Editor editor = sharedpreferences.edit(); String name = placeTitle.getText().toString(); if ("".equals(name)) { name = "DEFAULT"; } String data = posterPath + "**" + placeBounds.toString(); Log.d("LST", "putting shared prefs name: " + name + " data: " + data); editor.putString(name, data); editor.commit(); mListener.onFragmentDone(); } }; /** * Photo Selection result */ public void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == SELECT_PHOTO && resultCode == Activity.RESULT_OK) { HomeActivity activity = (HomeActivity) getActivity(); Bitmap bitmap = getBitmapFromCameraData(data, activity); poster.setImageBitmap(bitmap); Uri selectedImageUri = data.getData(); String filemanagerstring = selectedImageUri.getPath(); posterPath = getRealPathFromURI(activity, selectedImageUri); Log.d("LST", posterPath); } } private String getRealPathFromURI(Context mContext, Uri contentUri) { String[] proj = { MediaStore.Images.Media.DATA }; CursorLoader loader = new CursorLoader(mContext, contentUri, proj, null, null, null); Cursor cursor = loader.loadInBackground(); int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); cursor.moveToFirst(); return cursor.getString(column_index); } /** * Use for decoding camera response data. * * @param data * @param context * @return */ public static Bitmap getBitmapFromCameraData(Intent data, Context context) { Uri selectedImage = data.getData(); String[] filePathColumn = { MediaStore.Images.Media.DATA }; Cursor cursor = context.getContentResolver().query(selectedImage, filePathColumn, null, null, null); cursor.moveToFirst(); int columnIndex = cursor.getColumnIndex(filePathColumn[0]); String picturePath = cursor.getString(columnIndex); cursor.close(); return BitmapFactory.decodeFile(picturePath); } // Button.OnClickListener takePicture = new Button.OnClickListener() { // public void onClick(View v) { // if(NativeCameraFragment.this.paused){ // //reset camera // Log.d(TAG, "resetting camera"); // camera.startPreview(); // NativeCameraFragment.this.paused = false; // NativeCameraFragment.this.usePictureBtn.setEnabled(false); // NativeCameraFragment.this.takePictureBtn.setText(takePictureDefault); // } else { // Log.d(TAG, "snapping picture"); // camera.takePicture(null, null, myPictureCallback_JPG); // NativeCameraFragment.this.paused = true; // NativeCameraFragment.this.usePictureBtn.setEnabled(true); // NativeCameraFragment.this.takePictureBtn.setText("New Pic"); // } // //camera.stopPreview(); // //camera.release(); // //previewOn = false; // Don't release the camera in surfaceDestroyed() // } // }; // // Button.OnClickListener usePicture = new Button.OnClickListener() { // public void onClick(View v) { // Intent intent = new Intent(NativeCameraFragment.this, Upload.class); // Bundle bundle = new Bundle(); // bundle.putByteArray("imageData", NativeCameraFragment.this.imageData); // intent.putExtras(bundle); // startActivity(intent); // } // }; protected void setupPreview() { //getWindow().setFormat(PixelFormat.UNKNOWN); surfaceHolder = camPreview.getHolder(); surfaceHolder.addCallback(new SurfaceHolderCallback()); } private void cleanupCamera() { if (previewOn) { camera.setPreviewCallback(null); camera.stopPreview(); //stop the preview camera.release(); //release the camera for using it later (or if another app want to use) previewOn = false; } } public void onDestroy() { super.onDestroy(); cleanupCamera(); } // camera preview stuff class SurfaceHolderCallback implements SurfaceHolder.Callback { @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { if (null != camera) { try { //Camera.Parameters params = camera.getParameters(); // must change the camera parameters to fix a bug in XE1 //params.setPreviewFpsRange(CAMERA_FPS, CAMERA_FPS); //camera.setParameters(params); camera.setPreviewDisplay(surfaceHolder); //camera.startPreview(); previewOn = true; } catch (IOException e) { e.printStackTrace(); } } } @Override public void surfaceCreated(SurfaceHolder holder) { camera = Camera.open(); camera.setDisplayOrientation(90); } @Override public void surfaceDestroyed(SurfaceHolder holder) { cleanupCamera(); } } //Not used for now, but we may use in the future public static Camera getCameraInstance() { Camera camera = null; try { camera = Camera.open(); } catch (RuntimeException re) { Log.e(TAG, "Camera is null.", re); } return camera; } Camera.PictureCallback myPictureCallback_JPG = new Camera.PictureCallback() { @Override public void onPictureTaken(byte[] data, Camera camera) { File pictureFile = getOutputMediaFile(); if (pictureFile == null) { Toast.makeText(getActivity(), "Image retrieval failed.", Toast.LENGTH_SHORT).show(); return; } try { FileOutputStream fos = new FileOutputStream(pictureFile); fos.write(processPhoto(data)); fos.close(); if (pictureFile.exists()) { posterPath = pictureFile.getAbsolutePath(); Bitmap myBitmap = BitmapFactory.decodeFile(posterPath); poster.setImageBitmap(myBitmap); } poster.setVisibility(View.VISIBLE); camPreview.setVisibility(View.INVISIBLE); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }; private byte[] processPhoto(byte[] data) { Log.d(TAG, "picture processing"); Bitmap originalImg = BitmapFactory.decodeByteArray(data, 0, data.length); //resize image Bitmap resizedImg = Bitmap.createScaledBitmap(originalImg, (int) (originalImg.getWidth() * 0.2), (int) (originalImg.getHeight() * 0.2), true); //rotate image to match view for user Matrix matrix = new Matrix(); matrix.postRotate(90); Bitmap rotatedImg = Bitmap.createBitmap(resizedImg, 0, 0, resizedImg.getWidth(), resizedImg.getHeight(), matrix, true); //convert to byte format for sending to server ByteArrayOutputStream stream = new ByteArrayOutputStream(); rotatedImg.compress(Bitmap.CompressFormat.PNG, 100, stream); return stream.toByteArray(); } /** * Used to return the camera File output. * @return */ private File getOutputMediaFile() { File mediaStorageDir = new File( Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "UltimateCameraGuideApp"); if (!mediaStorageDir.exists()) { if (!mediaStorageDir.mkdirs()) { Log.d("Camera Guide", "Required media storage does not exist"); return null; } } // Create a media file name String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); File mediaFile; mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg"); //DialogHelper.showDialog( "Success!","Your picture has been saved!",getActivity()); return mediaFile; } // @Override // public void onPictureTaken(byte[] arg0, Camera arg1) { // Log.d(TAG, "picture taken"); // Bitmap originalImg = BitmapFactory.decodeByteArray(arg0, 0, arg0.length); // // //resize image // Bitmap resizedImg = Bitmap.createScaledBitmap(originalImg,(int)(originalImg.getWidth()*0.2), // (int)(originalImg.getHeight()*0.2), true); // //rotate image to match view for user // Matrix matrix = new Matrix(); // matrix.postRotate(90); // Bitmap rotatedImg = Bitmap.createBitmap(resizedImg, 0, 0, resizedImg.getWidth(), // resizedImg.getHeight(), matrix, true); // //convert to byte format for sending to server // ByteArrayOutputStream stream = new ByteArrayOutputStream(); // rotatedImg.compress(Bitmap.CompressFormat.PNG, 100, stream); // NativeCameraFragment.this.imageData = stream.toByteArray(); // } // }; }