QRScanner/glass/src/main/java/cz/cvut/fel/dce/qrscanner/PreviewActivity.java

   1 package cz.cvut.fel.dce.qrscanner;
   2
   3 import android.app.Activity;
   4 import android.content.Intent;
   5 import android.graphics.Bitmap;
   6 import android.graphics.Color;
   7 import android.net.Uri;
   8 import android.os.AsyncTask;
   9 import android.os.Bundle;
  10 import android.util.Log;
  11 import android.view.KeyEvent;
  12 import android.view.Menu;
  13 import android.view.MenuItem;
  14 import android.view.View;
  15 import android.view.ViewTreeObserver;
  16 import android.widget.ImageView;
  17 import android.widget.RelativeLayout;
  18 import android.widget.Toast;
  19
  20 import java.io.File;
  21
  22 import cz.cvut.fel.dce.qrscanner.mupdf.MuPDFCore;
  23 import cz.cvut.fel.dce.qrscanner.pdfviewer.PdfPageView;
  24 import cz.cvut.fel.dce.qrscanner.pdfviewer.PdfViewActivity;
  25
  26
  27 public class PreviewActivity extends Activity implements ViewTreeObserver.OnGlobalLayoutListener{
  28
  29         public static final String TAG = "PreviewActivity";
  30         public static final String STORAGE_PATH = "/storage/sdcard0/Pictures";
  31         public static final String SKODA_DOCS_PATH_EXTENSION = "/skoda/components/";
  32         public static final String SKODA_COMP_PICTURE_NAME = "Abbildung.pdf";
  33         public static final String SKODA_COMP_MANUFACTURING = "Arbeitseinleitung.pdf";
  34         public static final String SKODA_COMP_MANUFACT_IMAGES = "Bild_Arbeitseinleitung.pdf";
  35         public static final String SKODA_COMP_CONTACTS = "Angaben.pdf";
  36         public static final String SKODA_COMP_MANUFACT_GUIDE = "Werkstatt_Einleitung.pdf";
  37
  38         private ImageView mPreviewImg;
  39         private RelativeLayout mProgressContainer;
  40         private ViewTreeObserver mPreviewImgObserver;
  41         private String mComponentId;
  42         private String mComponentRootPath;
  43         private PdfPageView mPdfView;
  44         private boolean mPdfLoaded;
  45
  46         @Override
  47         protected void onCreate(Bundle savedInstanceState) {
  48                 super.onCreate(savedInstanceState);
  49                 setContentView(R.layout.activity_preview);
  50                 mPdfLoaded = false;
  51                 mPreviewImg = (ImageView) findViewById(R.id.imgComponent);
  52                 mProgressContainer = (RelativeLayout) findViewById(R.id.progress_container);
  53
  54                 if (mPreviewImg != null) {
  55                         mPreviewImg.setMaxWidth(640);
  56                         mPreviewImg.setMaxHeight(360);
  57                         mPreviewImg.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
  58                         mPreviewImgObserver = mPreviewImg.getViewTreeObserver();
  59                         Log.i(TAG, "Registering mPreviewImgObserver OnGlobalLayoutListener.");
  60                         mPreviewImgObserver.addOnGlobalLayoutListener(this);
  61                 }
  62                 else {
  63                         Log.e(TAG, "ImageView for preview image could not be found in the resources.");
  64                         mPreviewImgObserver = null;
  65                 }
  66
  67                 Intent intent = getIntent();
  68                 mComponentId = intent.getStringExtra("COMPONENT_ID");
  69
  70                 if (mComponentId != null) {
  71                         Log.i(TAG, "Received component id: " + mComponentId);
  72                         mComponentRootPath = STORAGE_PATH + SKODA_DOCS_PATH_EXTENSION + mComponentId + "/";
  73                         File rootPath = new File(mComponentRootPath);
  74                         if (!rootPath.isDirectory()) {
  75                                 Toast toast = Toast.makeText(getApplicationContext(), "Component not found", Toast.LENGTH_LONG);
  76                                 toast.show();
  77                                 finish();
  78                         }
  79                 }
  80                 else {
  81                         Log.i(TAG, "No component id received");
  82                         finish();
  83                 }
  84         }
  85
  86         @Override
  87         protected void onDestroy() {
  88                 super.onDestroy();
  89                 Log.i(TAG, "Unregistering mPreviewImgObserver OnGlobalLayoutListener.");
  90                 if (mPreviewImgObserver != null && mPreviewImgObserver.isAlive()) {
  91                         mPreviewImgObserver.removeOnGlobalLayoutListener(this);
  92                 }
  93         }
  94
  95         @Override
  96         public boolean onCreateOptionsMenu(Menu menu) {
  97                 // Inflate the menu; this adds items to the action bar if it is present.
  98                 getMenuInflater().inflate(R.menu.menu_preview, menu);
  99                 return true;
 100         }
 101
 102         @Override
 103         public void onGlobalLayout() {
 104                 if (mPdfLoaded) {
 105                         Log.d(TAG, "PDF file already loaded.");
 106                         return;
 107                 }
 108                 try {
 109                         String picturePath = mComponentRootPath + SKODA_COMP_PICTURE_NAME;
 110                         Log.i(TAG, "Path to component files: " + picturePath);
 111                         mPdfView = new PdfPageView(getApplicationContext(), picturePath);
 112                         mPdfView.setPage(0);
 113                         new LoadPageTask().execute();
 114
 115                         mPdfLoaded = true;
 116
 117                 } catch (Exception e) {
 118                         Toast toast = Toast.makeText(getApplicationContext(), "Component preview could not be loaded.", Toast.LENGTH_LONG);
 119                         toast.show();
 120                         e.printStackTrace();
 121                 }
 122         }
 123
 124         /** Called when the user touches the button */
 125         public void showContacts() {
 126                 showPDF(mComponentRootPath + SKODA_COMP_CONTACTS);
 127         }
 128
 129         /** Called when the user touches the button */
 130         public void showManufacturing() {
 131                 showPDF(mComponentRootPath + SKODA_COMP_MANUFACTURING);
 132         }
 133
 134         /** Called when the user touches the button */
 135         public void showManufactImages() {
 136                 showPDF(mComponentRootPath + SKODA_COMP_MANUFACT_IMAGES);
 137         }
 138
 139         /** Called when the user touches the button */
 140         public void showManufactGuide() {
 141                 showPDF(mComponentRootPath + SKODA_COMP_MANUFACT_GUIDE);
 142         }
 143
 144         private void showPDF(String filePath) {
 145                 Intent preview = new Intent(this, PdfViewActivity.class);
 146                 preview.putExtra("FILE_PATH", filePath);
 147                 startActivity(preview);
 148         }
 149
 150         @Override
 151         public boolean onKeyDown(int keyCode, KeyEvent event) {
 152                 if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
 153                         openOptionsMenu();
 154                         return true;
 155                 }
 156                 return super.onKeyDown(keyCode, event);
 157         }
 158
 159         @Override
 160         public boolean onOptionsItemSelected(MenuItem item) {
 161                 // Handle action bar item clicks here. The action bar will
 162                 // automatically handle clicks on the Home/Up button, so long
 163                 // as you specify a parent activity in AndroidManifest.xml.
 164                 int id = item.getItemId();
 165
 166                 if (id == R.id.show_contacts) {
 167                         showContacts();
 168                         return true;
 169                 }
 170                 else if (id == R.id.show_manufacturing) {
 171                         showManufacturing();
 172                         return true;
 173                 }
 174                 else if (id == R.id.show_pictured_manufacturing) {
 175                         showManufactImages();
 176                         return true;
 177                 }
 178                 else if (id == R.id.show_workshop) {
 179                         showManufactGuide();
 180                         return true;
 181                 }
 182                 else if (id == R.id.stop) {
 183                         finish();
 184                         return true;
 185                 }
 186                 else {
 187                         return super.onOptionsItemSelected(item);
 188                 }
 189         }
 190
 191         private class LoadPageTask extends AsyncTask<Void, Void, Void> {
 192
 193                 @Override
 194                 protected Void doInBackground(Void[] objects) {
 195                         mPdfView.loadPage();
 196                         return null;
 197                 }
 198
 199                 @Override
 200                 protected void onPreExecute() {
 201                         super.onPreExecute();
 202                         Log.d(TAG, "Starting loading of the PDF page asynchronously.");
 203                         mProgressContainer.setVisibility(View.VISIBLE);
 204                 }
 205
 206                 @Override
 207                 protected void onPostExecute(Void aVoid) {
 208                         super.onPostExecute(aVoid);
 209                         mProgressContainer.setVisibility(View.INVISIBLE);
 210                         mPreviewImg.setMinimumWidth(640);
 211                         mPreviewImg.setMinimumHeight(360);
 212                         mPreviewImg.setImageBitmap(mPdfView.getPageBitmap());
 213                         mPreviewImg.invalidate();
 214                         Log.d(TAG, "PDF page loaded.");
 215                 }
 216         }
 217
 218 }