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Android: Be able to have assets in a zip file
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230 changes: 230 additions & 0 deletions
230
Android/app/src/main/java/emu/project64/task/ExtractAssetZipTask.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,230 @@ | ||
| package emu.project64.task; | ||
|
|
||
| import java.io.BufferedInputStream; | ||
| import java.io.File; | ||
| import java.io.FileInputStream; | ||
| import java.io.FileNotFoundException; | ||
| import java.io.FileOutputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.OutputStream; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.zip.ZipEntry; | ||
| import java.util.zip.ZipInputStream; | ||
|
|
||
| import android.content.res.AssetManager; | ||
| import android.os.AsyncTask; | ||
| import android.text.TextUtils; | ||
| import android.util.Log; | ||
|
|
||
| public class ExtractAssetZipTask extends AsyncTask<Void, String, List<ExtractAssetZipTask.Failure>> | ||
| { | ||
| public interface ExtractAssetZipListener | ||
| { | ||
| public void onExtractAssetsProgress( String nextFileToExtract ); | ||
| public void onExtractAssetsFinished( List<Failure> failures ); | ||
| } | ||
|
|
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| public ExtractAssetZipTask( AssetManager assetManager, String dstPath, ExtractAssetZipListener listener) | ||
| { | ||
| if (assetManager == null ) | ||
| throw new IllegalArgumentException( "Asset manager cannot be null" ); | ||
| if( TextUtils.isEmpty( dstPath ) ) | ||
| throw new IllegalArgumentException( "Destination path cannot be null or empty" ); | ||
|
|
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| mAssetManager = assetManager; | ||
| mDstPath = dstPath; | ||
| mListener = listener; | ||
| } | ||
|
|
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| private final AssetManager mAssetManager; | ||
| private final String mDstPath; | ||
| private final ExtractAssetZipListener mListener; | ||
|
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| @Override | ||
| protected List<Failure> doInBackground( Void... params ) | ||
| { | ||
| return extractAssets( mDstPath ); | ||
| } | ||
|
|
||
| @Override | ||
| protected void onProgressUpdate( String... values ) | ||
| { | ||
| mListener.onExtractAssetsProgress( values[0] ); | ||
| } | ||
|
|
||
| @Override | ||
| protected void onPostExecute( List<ExtractAssetZipTask.Failure> result ) | ||
| { | ||
| mListener.onExtractAssetsFinished( result ); | ||
| } | ||
|
|
||
| public static final class Failure | ||
| { | ||
| public enum Reason | ||
| { | ||
| FILE_UNWRITABLE, | ||
| FILE_UNCLOSABLE, | ||
| ASSET_UNCLOSABLE, | ||
| ASSET_IO_EXCEPTION, | ||
| FILE_IO_EXCEPTION, | ||
| } | ||
|
|
||
| public final String srcPath; | ||
| public final String dstPath; | ||
| public final Reason reason; | ||
| public Failure( String srcPath, String dstPath, Reason reason ) | ||
| { | ||
| this.srcPath = srcPath; | ||
| this.dstPath = dstPath; | ||
| this.reason = reason; | ||
| } | ||
|
|
||
| @Override | ||
| public String toString() | ||
| { | ||
| switch( reason ) | ||
| { | ||
| case FILE_UNWRITABLE: | ||
| return "Failed to open file " + dstPath; | ||
| case FILE_UNCLOSABLE: | ||
| return "Failed to close file " + dstPath; | ||
| case ASSET_UNCLOSABLE: | ||
| return "Failed to close asset " + srcPath; | ||
| case ASSET_IO_EXCEPTION: | ||
| return "Failed to extract asset " + srcPath + " to file " + dstPath; | ||
| case FILE_IO_EXCEPTION: | ||
| return "Failed to add file " + srcPath + " to file " + dstPath; | ||
| default: | ||
| return "Failed using source " + srcPath + " and destination " + dstPath; | ||
| } | ||
| } | ||
| } | ||
|
|
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| private List<Failure> extractAssets( String dstPath ) | ||
| { | ||
| final List<Failure> failures = new ArrayList<Failure>(); | ||
|
|
||
| // Ensure the parent directories exist | ||
| File root = new File(dstPath + "/"); | ||
| if (!root.exists()) { | ||
| root.mkdirs(); | ||
| } | ||
|
|
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| String dstFile = dstPath + "/assets.zip"; | ||
| String srcFile = "assets.zip"; | ||
| // Call the progress listener before extracting | ||
| publishProgress( dstPath ); | ||
|
|
||
| // IO objects, initialize null to eliminate lint error | ||
| OutputStream out = null; | ||
| InputStream in = null; | ||
|
|
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| Boolean ExtractZip = false; | ||
| // Extract the file | ||
| try | ||
| { | ||
| out = new FileOutputStream( dstFile ); | ||
| in = mAssetManager.open( srcFile); | ||
| byte[] buffer = new byte[1024]; | ||
| int read; | ||
|
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||
| mListener.onExtractAssetsProgress( "copying asset zip file" ); | ||
| while( ( read = in.read( buffer ) ) != -1 ) | ||
| { | ||
| out.write( buffer, 0, read ); | ||
| } | ||
| mListener.onExtractAssetsProgress( "Finished copying assset zip" ); | ||
| out.flush(); | ||
| ExtractZip = true; | ||
| } | ||
| catch( FileNotFoundException e ) | ||
| { | ||
| Failure failure = new Failure( srcFile, dstPath, Failure.Reason.FILE_UNWRITABLE ); | ||
| Log.e( "ExtractAssetZipTask", failure.toString() ); | ||
| failures.add( failure ); | ||
| } | ||
| catch( IOException e ) | ||
| { | ||
| Failure failure = new Failure( srcFile, dstPath, Failure.Reason.ASSET_IO_EXCEPTION ); | ||
| Log.e( "ExtractAssetZipTask", failure.toString() ); | ||
| failures.add( failure ); | ||
| } | ||
| finally | ||
| { | ||
| if( out != null ) | ||
| { | ||
| try | ||
| { | ||
| out.close(); | ||
| } | ||
| catch( IOException e ) | ||
| { | ||
| Failure failure = new Failure( srcFile, dstPath, Failure.Reason.FILE_UNCLOSABLE ); | ||
| Log.e( "ExtractAssetZipTask", failure.toString() ); | ||
| failures.add( failure ); | ||
| } | ||
| } | ||
| if( in != null ) | ||
| { | ||
| try | ||
| { | ||
| in.close(); | ||
| } | ||
| catch( IOException e ) | ||
| { | ||
| Failure failure = new Failure( srcFile, dstPath, Failure.Reason.ASSET_UNCLOSABLE ); | ||
| Log.e( "ExtractAssetZipTask", failure.toString() ); | ||
| failures.add( failure ); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if (ExtractZip) | ||
| { | ||
| String zipFilePath = dstPath + "/assets.zip"; | ||
| String destDir = dstPath + "/"; | ||
| File dir = new File(destDir); | ||
| // create output directory if it doesn't exist | ||
| if(!dir.exists()) dir.mkdirs(); | ||
| FileInputStream fis; | ||
| //buffer for read and write data to file | ||
| byte[] buffer = new byte[1024]; | ||
| try { | ||
| fis = new FileInputStream(zipFilePath); | ||
| ZipInputStream zis = new ZipInputStream(fis); | ||
| ZipEntry ze = zis.getNextEntry(); | ||
| while(ze != null){ | ||
| String fileName = ze.getName(); | ||
| File newFile = new File(destDir + File.separator + fileName.replace("\\", "/")); | ||
| mListener.onExtractAssetsProgress( "Unzipping "+fileName ); | ||
|
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| //create directories for sub directories in zip | ||
| new File(newFile.getParent()).mkdirs(); | ||
| if (ze.getSize() != 0) { | ||
| FileOutputStream fos = new FileOutputStream(newFile); | ||
| int len; | ||
| while ((len = zis.read(buffer)) > 0) { | ||
| fos.write(buffer, 0, len); | ||
| } | ||
| fos.close(); | ||
| } | ||
| //close this ZipEntry | ||
| zis.closeEntry(); | ||
| ze = zis.getNextEntry(); | ||
| } | ||
| //close last ZipEntry | ||
| zis.closeEntry(); | ||
| zis.close(); | ||
| fis.close(); | ||
| } catch (IOException e) { | ||
| Failure failure = new Failure( srcFile, dstPath, Failure.Reason.ASSET_IO_EXCEPTION ); | ||
| Log.e( "ExtractAssetZipTask", failure.toString() ); | ||
| failures.add( failure ); | ||
| } | ||
| } | ||
| return failures; | ||
| } | ||
| } |
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