import android.app.Activity;
import android.content.Context;
import android.content.Intent;
-import android.graphics.Bitmap;
-import android.graphics.Color;
import android.media.AudioManager;
-import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import java.io.File;
-import cz.cvut.fel.dce.qrscanner.mupdf.MuPDFCore;
import cz.cvut.fel.dce.qrscanner.pdfviewer.PdfPageView;
import cz.cvut.fel.dce.qrscanner.pdfviewer.PdfViewActivity;
-
+/**
+ * An activity for component picture preview with menu for selecting documents to be shown.
+ *
+ * The activity is designed to be called via an Intent with a component identifier string passed
+ * with the key COMPONENT_ID.
+ *
+ * The activity loads the component picture from the PDF file asynchronously to not block the UI.
+ */
public class PreviewActivity extends Activity implements ViewTreeObserver.OnGlobalLayoutListener{
-
+ /**
+ * An activity tag for debug, error and info messages.
+ */
public static final String TAG = "PreviewActivity";
+ /**
+ * The path to the storage folder, where the application stores its data.
+ * <p>This path should not be hardcoded like this, but the Android API functions were returning
+ * paths tht were not valid on our Android devices.</p>
+ */
public static final String STORAGE_PATH = "/storage/sdcard0/Pictures";
+ /**
+ * The path in the application data folder, where the component database is.
+ */
public static final String SKODA_DOCS_PATH_EXTENSION = "/skoda/components/";
+ /**
+ * The name of the PDF file containing the pisture of the component.
+ */
public static final String SKODA_COMP_PICTURE_NAME = "Abbildung.pdf";
+ /**
+ * The name of the PDF file containing the manufacturing process description.
+ */
public static final String SKODA_COMP_MANUFACTURING = "Arbeitseinleitung.pdf";
+ /**
+ * The name of the PDF file containing the manufacturing process description with pictures.
+ */
public static final String SKODA_COMP_MANUFACT_IMAGES = "Bild_Arbeitseinleitung.pdf";
+ /**
+ * The name of the PDF file containing the contacts for the component manufacturer.
+ */
public static final String SKODA_COMP_CONTACTS = "Angaben.pdf";
+ /**
+ * The name of the PDF file containing the manufacturing guide.
+ */
public static final String SKODA_COMP_MANUFACT_GUIDE = "Werkstatt_Einleitung.pdf";
+ /**
+ * The Key of the Component Identifier value, passed as a data to the activity launch intent.
+ */
+ public static final String COMP_ID_INTENT_KEY = "COMPONENT_ID";
+ /**
+ * The widget for showing the component preview image.
+ */
private ImageView mPreviewImg;
+ /**
+ * The container for progress bar widget and text view.
+ * <p>Those two are in the container to make them easily disappear and appear when needed.</p>
+ */
private RelativeLayout mProgressContainer;
+ /**
+ * The observer of the view tree for detection of the end of the View tree loading.
+ */
private ViewTreeObserver mPreviewImgObserver;
- private String mComponentId;
+ /**
+ * The path to the directory containing documents for the component.
+ */
private String mComponentRootPath;
+ /**
+ * Widget containing loaded page from a PDF file.
+ */
private PdfPageView mPdfView;
+ /**
+ * Flag signalling whether the PDF page has been loaded.
+ */
private boolean mPdfLoaded;
@Override
mPreviewImg = (ImageView) findViewById(R.id.imgComponent);
mProgressContainer = (RelativeLayout) findViewById(R.id.progress_container);
- if (mPreviewImg != null) {
- mPreviewImg.setMaxWidth(640);
- mPreviewImg.setMaxHeight(360);
- mPreviewImg.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
- mPreviewImgObserver = mPreviewImg.getViewTreeObserver();
- Log.i(TAG, "Registering mPreviewImgObserver OnGlobalLayoutListener.");
- mPreviewImgObserver.addOnGlobalLayoutListener(this);
+ if (mProgressContainer == null) {
+ Log.e(TAG, "Progress container not found in the activity layout.");
+ finish();
}
- else {
- Log.e(TAG, "ImageView for preview image could not be found in the resources.");
- mPreviewImgObserver = null;
+ if (mPreviewImg == null) {
+ Log.e(TAG, "ImageView for preview image could not be found in the activity layout.");
+ finish();
}
+ mPreviewImgObserver = mPreviewImg.getViewTreeObserver();
+ Log.d(TAG, "Registering mPreviewImgObserver OnGlobalLayoutListener.");
+ mPreviewImgObserver.addOnGlobalLayoutListener(this);
+
Intent intent = getIntent();
- mComponentId = intent.getStringExtra("COMPONENT_ID");
+ String mComponentId = intent.getStringExtra(COMP_ID_INTENT_KEY);
if (mComponentId != null) {
Log.i(TAG, "Received component id: " + mComponentId);
mComponentRootPath = STORAGE_PATH + SKODA_DOCS_PATH_EXTENSION + mComponentId + "/";
File rootPath = new File(mComponentRootPath);
if (!rootPath.isDirectory()) {
+ Log.e(TAG, "Component database root directory " + rootPath.getAbsolutePath() + " does not exist.");
Toast toast = Toast.makeText(getApplicationContext(), "Component not found", Toast.LENGTH_LONG);
toast.show();
AudioManager audio = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
}
}
else {
- Log.i(TAG, "No component id received");
+ Log.e(TAG, "No component id received.");
finish();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
- Log.i(TAG, "Unregistering mPreviewImgObserver OnGlobalLayoutListener.");
+ Log.d(TAG, "Unregister mPreviewImgObserver OnGlobalLayoutListener.");
if (mPreviewImgObserver != null && mPreviewImgObserver.isAlive()) {
mPreviewImgObserver.removeOnGlobalLayoutListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
- // Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_preview, menu);
return true;
}
try {
String picturePath = mComponentRootPath + SKODA_COMP_PICTURE_NAME;
Log.i(TAG, "Path to component files: " + picturePath);
+ Log.d(TAG, "Loading PDF file " + picturePath);
mPdfView = new PdfPageView(getApplicationContext(), picturePath);
mPdfView.setPage(0);
new LoadPageTask().execute();
mPdfLoaded = true;
} catch (Exception e) {
+ Log.e(TAG, "Component picture loading from PDF file failed: " + e.getMessage());
Toast toast = Toast.makeText(getApplicationContext(), "Component preview could not be loaded.", Toast.LENGTH_LONG);
toast.show();
AudioManager audio = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
}
}
- /** Called when the user touches the button */
+ /** Called when the user touches the button Contacts. */
public void showContacts() {
showPDF(mComponentRootPath + SKODA_COMP_CONTACTS);
}
- /** Called when the user touches the button */
+ /** Called when the user touches the button Manufacturing. */
public void showManufacturing() {
showPDF(mComponentRootPath + SKODA_COMP_MANUFACTURING);
}
- /** Called when the user touches the button */
+ /** Called when the user touches the button Manufacturing pictured. */
public void showManufactImages() {
showPDF(mComponentRootPath + SKODA_COMP_MANUFACT_IMAGES);
}
- /** Called when the user touches the button */
+ /** Called when the user touches the button Manufacture guide. */
public void showManufactGuide() {
showPDF(mComponentRootPath + SKODA_COMP_MANUFACT_GUIDE);
}
+ /**
+ * Launch an activity to show the PDF file.
+ * @param filePath Path to the PDF file to be shown
+ */
private void showPDF(String filePath) {
Intent preview = new Intent(this, PdfViewActivity.class);
- preview.putExtra("FILE_PATH", filePath);
+ preview.putExtra(PdfViewActivity.FILE_PATH_INTENT_KEY, filePath);
startActivity(preview);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
- // Handle action bar item clicks here. The action bar will
- // automatically handle clicks on the Home/Up button, so long
- // as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.show_contacts) {
}
}
+ /**
+ * Class for asynchronous loading of the PDF page to a bitmap.
+ */
private class LoadPageTask extends AsyncTask<Void, Void, Void> {
@Override
mProgressContainer.setVisibility(View.INVISIBLE);
mPreviewImg.setMinimumWidth(640);
mPreviewImg.setMinimumHeight(360);
+ mPreviewImg.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
mPreviewImg.setImageBitmap(mPdfView.getPageBitmap());
mPreviewImg.invalidate();
Log.d(TAG, "PDF page loaded.");
}
}
-
}
projects / hornmich / skoda-qr-demo.git / blobdiff