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Deletes any duplicate images taken by camera

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This commit is contained in:
macdonst 2011-09-29 22:29:35 -04:00
parent 0d57404cf1
commit 367d7500d5
1 changed files with 54 additions and 2 deletions
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56
framework/src/com/phonegap/CameraLauncher.java
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@ -24,9 +24,12 @@ import com.phonegap.api.PluginResult;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.net.Uri;
import android.provider.ContactsContract;
import android.provider.MediaStore;
import android.util.Log;
/**
@ -63,6 +66,7 @@ public class CameraLauncher extends Plugin {
private int mediaType; // What type of media to retrieve
public String callbackId;
private int numPics;
/**
* Constructor.
@ -147,7 +151,10 @@ public class CameraLauncher extends Plugin {
*/
public void takePicture(int quality, int returnType, int encodingType) {
this.mQuality = quality;
// Save the number of images currently on disk for later
this.numPics = queryImgDB().getCount();
// Display camera
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
@ -266,7 +273,7 @@ public class CameraLauncher extends Plugin {
// Get src and dest types from request code
int srcType = (requestCode/16) - 1;
int destType = (requestCode % 16) - 1;
// If CAMERA
if (srcType == CAMERA) {
// If image available
@ -294,6 +301,7 @@ public class CameraLauncher extends Plugin {
// If sending base64 image back
if (destType == DATA_URL) {
this.processPicture(bitmap);
checkForDuplicateImage(DATA_URL);
}
// If sending filename back
@ -333,6 +341,8 @@ public class CameraLauncher extends Plugin {
bitmap.recycle();
bitmap = null;
System.gc();
checkForDuplicateImage(FILE_URI);
} catch (IOException e) {
e.printStackTrace();
this.failPicture("Error capturing image.");
@ -414,7 +424,49 @@ public class CameraLauncher extends Plugin {
}
}
}
/**
* Creates a cursor that can be used to determine how many images we have.
*
* @return a cursor
*/
private Cursor queryImgDB() {
return this.ctx.getContentResolver().query(
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
new String[] { MediaStore.Images.Media._ID },
null,
null,
null);
}
/**
* Used to find out if we are in a situation where the Camera Intent adds to images
* to the content store. If we are using a FILE_URI and the number of images in the DB
* increases by 2 we have a duplicate, when using a DATA_URL the number is 1.
*
* @param type FILE_URI or DATA_URL
*/
private void checkForDuplicateImage(int type) {
int diff = 0;
Cursor cursor = queryImgDB();
int currentNumOfImages = cursor.getCount();
if (type == FILE_URI) {
diff = 1;
}
// delete the duplicate file if the difference is 2 for file URI or 1 for Data URL
if ((currentNumOfImages - numPics) > diff) {
cursor.moveToLast();
int id = Integer.valueOf(cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media._ID))) - 1;
Uri uri = Uri.parse(MediaStore.Images.Media.EXTERNAL_CONTENT_URI + "/" + id);
Log.d(LOG_TAG, "Deleting URI = " + uri.toString());
this.ctx.getContentResolver().delete(uri, null, null);
}
}
/**
* Compress bitmap using jpeg, convert to Base64 encoded string, and return to JavaScript.
*