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Added support of "content://", "assets://", "drawable://" schemes for
image URIs from the box. Included ExtendedImageDownloader into the library, use it as default downloader.
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77 changes: 77 additions & 0 deletions
77
library/src/com/nostra13/universalimageloader/core/download/ExtendedImageDownloader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| package com.nostra13.universalimageloader.core.download; | ||
|
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| import java.io.ByteArrayInputStream; | ||
| import java.io.ByteArrayOutputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.net.URI; | ||
|
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| import android.content.ContentProvider; | ||
| import android.content.ContentResolver; | ||
| import android.content.Context; | ||
| import android.graphics.Bitmap; | ||
| import android.graphics.Bitmap.CompressFormat; | ||
| import android.graphics.drawable.BitmapDrawable; | ||
| import android.net.Uri; | ||
|
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| /** | ||
| * Image downloader which supports retrieving images from {@linkplain ContentProvider content providers} | ||
| * (<b>"content://..."</b>), assets (<b>"assets://..."</b>) and drawables (<b>"drawable://..."</b>). | ||
| * | ||
| * @author Sergey Tarasevich | ||
| * @created 02.02.2013 | ||
| */ | ||
| public class ExtendedImageDownloader extends URLConnectionImageDownloader { | ||
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| protected static final String SCHEME_CONTENT = ContentResolver.SCHEME_CONTENT; | ||
| protected static final String SCHEME_ASSETS = "assets"; | ||
| protected static final String SCHEME_DRAWABLE = "drawable"; | ||
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| private static final String SCHEME_ASSETS_PREFIX = SCHEME_ASSETS + "://"; | ||
| private static final String SCHEME_DRAWABLE_PREFIX = SCHEME_DRAWABLE + "://"; | ||
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| protected Context context; | ||
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| public ExtendedImageDownloader(Context context) { | ||
| this.context = context; | ||
| } | ||
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| @Override | ||
| protected InputStream getStreamFromOtherSource(URI imageUri) throws IOException { | ||
| String protocol = imageUri.getScheme(); | ||
| if (SCHEME_CONTENT.equals(protocol)) { | ||
| return getStreamFromContent(imageUri); | ||
| } else if (SCHEME_ASSETS.equals(protocol)) { | ||
| return getStreamFromAssets(imageUri); | ||
| } else if (SCHEME_DRAWABLE.equals(protocol)) { | ||
| return getStreamFromDrawable(imageUri); | ||
| } else { | ||
| return super.getStreamFromOtherSource(imageUri); | ||
| } | ||
| } | ||
|
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| /** Retrieves {@link InputStream} of image by URI (image is accessed using {@link ContentResolver}) */ | ||
| protected InputStream getStreamFromContent(URI imageUri) throws IOException { | ||
| ContentResolver res = context.getContentResolver(); | ||
| Uri uri = Uri.parse(imageUri.toString()); | ||
| return res.openInputStream(uri); | ||
| } | ||
|
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| /** Retrieves {@link InputStream} of image by URI (image is located in assets of application) */ | ||
| protected InputStream getStreamFromAssets(URI imageUri) throws IOException { | ||
| String filePath = imageUri.toString().substring(SCHEME_ASSETS_PREFIX.length()); // Remove "assets://" prefix from image URI | ||
| return context.getAssets().open(filePath); | ||
| } | ||
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| /** Retrieves {@link InputStream} of image by URI (image is located in drawable resources of application) */ | ||
| protected InputStream getStreamFromDrawable(URI imageUri) { | ||
| String drawableIdString = imageUri.toString().substring(SCHEME_DRAWABLE_PREFIX.length()); // Remove "drawable://" prefix from image URI | ||
| int drawableId = Integer.parseInt(drawableIdString); | ||
| BitmapDrawable drawable = (BitmapDrawable) context.getResources().getDrawable(drawableId); | ||
| Bitmap bitmap = drawable.getBitmap(); | ||
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| ByteArrayOutputStream os = new ByteArrayOutputStream(); | ||
| bitmap.compress(CompressFormat.PNG, 0, os); | ||
| return new ByteArrayInputStream(os.toByteArray()); | ||
| } | ||
| } |
98 changes: 49 additions & 49 deletions
98
library/src/com/nostra13/universalimageloader/core/download/ImageDownloader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,50 +1,50 @@ | ||
| package com.nostra13.universalimageloader.core.download; | ||
|
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| import java.io.BufferedInputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.net.URI; | ||
|
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| /** | ||
| * Provides retrieving of {@link InputStream} of image by URI. | ||
| * | ||
| * @author Sergey Tarasevich (nostra13[at]gmail[dot]com) | ||
| */ | ||
| public abstract class ImageDownloader { | ||
|
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| protected static final String PROTOCOL_FILE = "file"; | ||
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| protected static final String PROTOCOL_HTTP = "http"; | ||
| protected static final String PROTOCOL_HTTPS = "https"; | ||
| protected static final String PROTOCOL_FTP = "ftp"; | ||
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| protected static final int BUFFER_SIZE = 8 * 1024; // 8 Kb | ||
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| /** Retrieves {@link InputStream} of image by URI. Image can be located as in the network and on local file system. */ | ||
| public InputStream getStream(URI imageUri) throws IOException { | ||
| String scheme = imageUri.getScheme(); | ||
| if (PROTOCOL_HTTP.equals(scheme) || PROTOCOL_HTTPS.equals(scheme) || PROTOCOL_FTP.equals(scheme)) { | ||
| return getStreamFromNetwork(imageUri); | ||
| } else if (PROTOCOL_FILE.equals(scheme)) { | ||
| return getStreamFromFile(imageUri); | ||
| } else { | ||
| return getStreamFromOtherSource(imageUri); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Retrieves {@link InputStream} of image by URI from other source. Should be overriden by successors to implement | ||
| * image downloading from special sources (not local file and not web URL). | ||
| */ | ||
| protected InputStream getStreamFromOtherSource(URI imageUri) throws IOException { | ||
| return null; | ||
| } | ||
|
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| /** Retrieves {@link InputStream} of image by URI (image is located in the network) */ | ||
| protected abstract InputStream getStreamFromNetwork(URI imageUri) throws IOException; | ||
|
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| /** Retrieves {@link InputStream} of image by URI (image is located on the local file system or SD card) */ | ||
| protected InputStream getStreamFromFile(URI imageUri) throws IOException { | ||
| return new BufferedInputStream(imageUri.toURL().openStream(), BUFFER_SIZE); | ||
| } | ||
| package com.nostra13.universalimageloader.core.download; | ||
|
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| import java.io.BufferedInputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.net.URI; | ||
|
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| /** | ||
| * Provides retrieving of {@link InputStream} of image by URI. | ||
| * | ||
| * @author Sergey Tarasevich (nostra13[at]gmail[dot]com) | ||
| */ | ||
| public abstract class ImageDownloader { | ||
|
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| protected static final String SCHEME_FILE = "file"; | ||
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| protected static final String SCHEME_HTTP = "http"; | ||
| protected static final String SCHEME_HTTPS = "https"; | ||
| protected static final String SCHEME_FTP = "ftp"; | ||
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| protected static final int BUFFER_SIZE = 8 * 1024; // 8 Kb | ||
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| /** Retrieves {@link InputStream} of image by URI. Image can be located as in the network and on local file system. */ | ||
| public InputStream getStream(URI imageUri) throws IOException { | ||
| String scheme = imageUri.getScheme(); | ||
| if (SCHEME_HTTP.equals(scheme) || SCHEME_HTTPS.equals(scheme) || SCHEME_FTP.equals(scheme)) { | ||
| return getStreamFromNetwork(imageUri); | ||
| } else if (SCHEME_FILE.equals(scheme)) { | ||
| return getStreamFromFile(imageUri); | ||
| } else { | ||
| return getStreamFromOtherSource(imageUri); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Retrieves {@link InputStream} of image by URI from other source. Should be overriden by successors to implement | ||
| * image downloading from special sources (not local file and not web URL). | ||
| */ | ||
| protected InputStream getStreamFromOtherSource(URI imageUri) throws IOException { | ||
| return null; | ||
| } | ||
|
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| /** Retrieves {@link InputStream} of image by URI (image is located in the network) */ | ||
| protected abstract InputStream getStreamFromNetwork(URI imageUri) throws IOException; | ||
|
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| /** Retrieves {@link InputStream} of image by URI (image is located on the local file system or SD card) */ | ||
| protected InputStream getStreamFromFile(URI imageUri) throws IOException { | ||
| return new BufferedInputStream(imageUri.toURL().openStream(), BUFFER_SIZE); | ||
| } | ||
| } |
82 changes: 41 additions & 41 deletions
82
...ary/src/com/nostra13/universalimageloader/core/download/URLConnectionImageDownloader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,42 +1,42 @@ | ||
| package com.nostra13.universalimageloader.core.download; | ||
|
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| import java.io.BufferedInputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.net.URI; | ||
| import java.net.URLConnection; | ||
|
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| import com.nostra13.universalimageloader.core.assist.FlushedInputStream; | ||
|
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| /** | ||
| * Default implementation of ImageDownloader. Uses {@link URLConnection} for image stream retrieving. | ||
| * | ||
| * @author Sergey Tarasevich (nostra13[at]gmail[dot]com) | ||
| */ | ||
| public class URLConnectionImageDownloader extends ImageDownloader { | ||
|
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| /** {@value} */ | ||
| public static final int DEFAULT_HTTP_CONNECT_TIMEOUT = 5 * 1000; // milliseconds | ||
| /** {@value} */ | ||
| public static final int DEFAULT_HTTP_READ_TIMEOUT = 20 * 1000; // milliseconds | ||
|
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| private int connectTimeout; | ||
| private int readTimeout; | ||
|
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| public URLConnectionImageDownloader() { | ||
| this(DEFAULT_HTTP_CONNECT_TIMEOUT, DEFAULT_HTTP_READ_TIMEOUT); | ||
| } | ||
|
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| public URLConnectionImageDownloader(int connectTimeout, int readTimeout) { | ||
| this.connectTimeout = connectTimeout; | ||
| this.readTimeout = readTimeout; | ||
| } | ||
|
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| @Override | ||
| public InputStream getStreamFromNetwork(URI imageUri) throws IOException { | ||
| URLConnection conn = imageUri.toURL().openConnection(); | ||
| conn.setConnectTimeout(connectTimeout); | ||
| conn.setReadTimeout(readTimeout); | ||
| return new FlushedInputStream(new BufferedInputStream(conn.getInputStream(), BUFFER_SIZE)); | ||
| } | ||
| package com.nostra13.universalimageloader.core.download; | ||
|
|
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| import java.io.BufferedInputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.net.URI; | ||
| import java.net.URLConnection; | ||
|
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| import com.nostra13.universalimageloader.core.assist.FlushedInputStream; | ||
|
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| /** | ||
| * Implementation of ImageDownloader which uses {@link URLConnection} for image stream retrieving. | ||
| * | ||
| * @author Sergey Tarasevich (nostra13[at]gmail[dot]com) | ||
| */ | ||
| public class URLConnectionImageDownloader extends ImageDownloader { | ||
|
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| /** {@value} */ | ||
| public static final int DEFAULT_HTTP_CONNECT_TIMEOUT = 5 * 1000; // milliseconds | ||
| /** {@value} */ | ||
| public static final int DEFAULT_HTTP_READ_TIMEOUT = 20 * 1000; // milliseconds | ||
|
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| private int connectTimeout; | ||
| private int readTimeout; | ||
|
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| public URLConnectionImageDownloader() { | ||
| this(DEFAULT_HTTP_CONNECT_TIMEOUT, DEFAULT_HTTP_READ_TIMEOUT); | ||
| } | ||
|
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| public URLConnectionImageDownloader(int connectTimeout, int readTimeout) { | ||
| this.connectTimeout = connectTimeout; | ||
| this.readTimeout = readTimeout; | ||
| } | ||
|
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| @Override | ||
| public InputStream getStreamFromNetwork(URI imageUri) throws IOException { | ||
| URLConnection conn = imageUri.toURL().openConnection(); | ||
| conn.setConnectTimeout(connectTimeout); | ||
| conn.setReadTimeout(readTimeout); | ||
| return new FlushedInputStream(new BufferedInputStream(conn.getInputStream(), BUFFER_SIZE)); | ||
| } | ||
| } |