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位置情報を追加する際に一時ファイルがMesiaScannerに使われないようにした
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97 changes: 97 additions & 0 deletions
97
app/src/main/java/jp/juggler/fadownloader/MediaScannerTracker.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| package jp.juggler.fadownloader; | ||
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| import android.content.Context; | ||
| import android.media.MediaScannerConnection; | ||
| import android.net.Uri; | ||
| import android.os.Handler; | ||
| import android.os.SystemClock; | ||
| import android.text.TextUtils; | ||
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| import java.io.File; | ||
| import java.util.concurrent.ConcurrentLinkedQueue; | ||
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| public class MediaScannerTracker implements MediaScannerConnection.MediaScannerConnectionClient{ | ||
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| @Override public void onMediaScannerConnected(){ | ||
| handler.post( queue_reader ); | ||
| } | ||
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| @Override public void onScanCompleted( String path, Uri uri ){ | ||
| } | ||
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| final Context context; | ||
| final LogWriter log; | ||
| final MediaScannerConnection conn; | ||
| final Handler handler; | ||
| long last_connect_start; | ||
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| volatile boolean is_dispose = false; | ||
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| void dispose(){ | ||
| is_dispose = true; | ||
| } | ||
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| public MediaScannerTracker( Context context, LogWriter log ){ | ||
| this.context = context; | ||
| this.log = log; | ||
| this.conn = new MediaScannerConnection( context, this ); | ||
| this.handler = new Handler(); | ||
| prepareConnection(); | ||
| } | ||
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| static class Item{ | ||
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| String path; | ||
| String mime_type; | ||
| } | ||
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| final ConcurrentLinkedQueue<Item> queue = new ConcurrentLinkedQueue<>(); | ||
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| public void addFile( File file, String mime_type ){ | ||
| if( file == null || ! file.isFile() ) return; | ||
| if( TextUtils.isEmpty( mime_type ) ) return; | ||
| Item item = new Item(); | ||
| item.path = file.getAbsolutePath(); | ||
| item.mime_type = mime_type; | ||
| queue.add( item ); | ||
| handler.post( queue_reader ); | ||
| } | ||
|
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| private boolean prepareConnection(){ | ||
| if( conn.isConnected() ) return true; | ||
|
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| long now = SystemClock.elapsedRealtime(); | ||
| if( now - last_connect_start >= 5000L ){ | ||
| last_connect_start = now; | ||
| conn.connect(); | ||
| } | ||
| return false; | ||
| } | ||
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| final Runnable queue_reader = new Runnable(){ | ||
| @Override public void run(){ | ||
| handler.removeCallbacks( queue_reader ); | ||
| for( ; ; ){ | ||
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| Item item = queue.peek(); | ||
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| if( item == null ){ | ||
| if( is_dispose ){ | ||
| conn.disconnect(); | ||
| } | ||
| break; | ||
| } | ||
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| if( ! prepareConnection() ){ | ||
| handler.postDelayed( queue_reader, 1000L ); | ||
| break; | ||
| } | ||
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| conn.scanFile( item.path, item.mime_type ); | ||
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| queue.poll(); | ||
| } | ||
| } | ||
| }; | ||
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| } |
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