Skip to content

Commit c979015

Browse files
author
Leo Neat
committed
Working dfs
1 parent ff4d395 commit c979015

File tree

1 file changed

+139
-57
lines changed

1 file changed

+139
-57
lines changed

‎mediacontroller/src/main/java/com/example/android/mediacontroller/MediaAppControllerActivity.java

Lines changed: 139 additions & 57 deletions
Original file line numberDiff line numberDiff line change
@@ -30,7 +30,11 @@
3030
import android.graphics.drawable.Drawable;
3131
import android.media.AudioManager;
3232
import android.net.Uri;
33+
import android.os.Build;
3334
import android.os.Bundle;
35+
import android.os.Handler;
36+
import android.os.HandlerThread;
37+
import android.os.Looper;
3438
import android.os.RemoteException;
3539
import android.support.v4.media.MediaBrowserCompat;
3640
import android.support.v4.media.MediaBrowserCompat.MediaItem;
@@ -60,13 +64,15 @@
6064
import androidx.annotation.IdRes;
6165
import androidx.annotation.NonNull;
6266
import androidx.annotation.Nullable;
67+
import androidx.annotation.RequiresApi;
6368
import androidx.appcompat.app.ActionBar;
6469
import androidx.appcompat.app.AppCompatActivity;
6570
import androidx.appcompat.widget.Toolbar;
6671
import androidx.core.app.ActivityCompat;
6772
import androidx.core.content.ContextCompat;
6873
import androidx.core.content.res.ResourcesCompat;
6974
import androidx.core.graphics.drawable.DrawableCompat;
75+
import androidx.core.os.HandlerCompat;
7076
import androidx.media.MediaBrowserServiceCompat;
7177
import androidx.recyclerview.widget.DiffUtil;
7278
import androidx.recyclerview.widget.LinearLayoutManager;
@@ -91,6 +97,12 @@
9197
import java.util.Map;
9298
import java.util.Set;
9399
import java.util.Stack;
100+
import java.util.concurrent.CompletableFuture;
101+
import java.util.concurrent.ExecutionException;
102+
import java.util.concurrent.ExecutorService;
103+
import java.util.concurrent.Executors;
104+
import java.util.concurrent.Semaphore;
105+
import java.util.concurrent.locks.Lock;
94106

95107
/**
96108
* This class connects to a {@link MediaBrowserServiceCompat}
@@ -1247,6 +1259,7 @@ void updateItems(List items) {
12471259
* Assigns click handlers to the buttons if provided for moving to the top of the tree or
12481260
* for moving up one level in the tree.
12491261
*/
1262+
@RequiresApi(api = Build.VERSION_CODES.N)
12501263
void init(View topButtonView, View upButtonView, View saveButtonView) {
12511264
if (topButtonView != null) {
12521265
topButtonView.setOnClickListener(v -> {
@@ -1271,6 +1284,14 @@ void init(View topButtonView, View upButtonView, View saveButtonView) {
12711284
}
12721285
if (saveButtonView != null) {
12731286
notifyDataSetChanged();
1287+
1288+
// Go to root of browse tree
1289+
unsubscribe();
1290+
while (mNodes.size() > 1) {
1291+
mNodes.pop();
1292+
}
1293+
subscribe();
1294+
12741295
saveButtonView.setOnClickListener(
12751296
v -> {
12761297

@@ -1283,80 +1304,141 @@ void init(View topButtonView, View upButtonView, View saveButtonView) {
12831304
return;
12841305
}
12851306
File root = android.os.Environment.getExternalStorageDirectory();
1307+
String dirs_path = root.getAbsolutePath() + "/Temp/";
1308+
File dirs = new File(dirs_path);
1309+
File file = new File(dirs.getAbsolutePath(), "_BrowseTreeContent.txt");
1310+
if(file.exists()){
1311+
file.delete();
1312+
}
12861313
try {
1287-
String dirs_path = root.getAbsolutePath() + "/Temp/";
1288-
File dirs = new File(dirs_path);
1289-
File file = new File(dirs.getAbsolutePath(), "_BrowseTreeContent.txt");
1290-
FileOutputStream f = new FileOutputStream(file);
1291-
PrintWriter pw = new PrintWriter(f);
1292-
// We print the file path at the beginning of the file so that we can use it
1293-
// to pull the file from platform to local computer.
1294-
1295-
pw.println(file.toString());
1296-
if(mItems == null){
1297-
Toast toast =
1298-
Toast.makeText(
1299-
getApplicationContext(),
1300-
"No media items found, could not save tree.",
1301-
Toast.LENGTH_LONG);
1302-
toast.setMargin(50, 50);
1303-
toast.show();
1304-
return;
1305-
}
1314+
final FileOutputStream f = new FileOutputStream(file);
13061315

1307-
for (MediaBrowserCompat.MediaItem item : mItems) {
1308-
if(item != null) {
1309-
Log.i(TAG, "Logging media item");
1310-
MediaDescriptionCompat descriptionCompat = item.getDescription();
1311-
if (descriptionCompat != null) {
1312-
String infoStr = "Title:";
1313-
infoStr += descriptionCompat.getTitle() != null
1314-
? descriptionCompat.getTitle().toString()
1315-
: "NAN";
1316-
1317-
infoStr += ",Subtitle:";
1318-
infoStr += descriptionCompat.getSubtitle() != null
1319-
? descriptionCompat.getSubtitle().toString()
1320-
: "NAN";
1321-
1322-
infoStr += ",MediaId:";
1323-
infoStr += descriptionCompat.getMediaId() != null
1324-
? descriptionCompat.getMediaId().toString()
1325-
: "NAN";
1326-
infoStr += ",Uri:";
1327-
infoStr += descriptionCompat.getMediaUri() != null
1328-
? descriptionCompat.getMediaUri().toString()
1329-
: "NAN";
1330-
infoStr += ",Description:";
1331-
infoStr += descriptionCompat.getDescription() != null
1332-
? descriptionCompat.getDescription().toString()
1333-
: "NAN";
1334-
1335-
pw.println(infoStr);
1336-
}
1337-
}
1338-
}
1316+
PrintWriter pw = new PrintWriter(f);
1317+
// We print the file path at the beginning of the file so that we can use it
1318+
// to pull the file from platform to local computer.
13391319

1340-
pw.flush();
1341-
pw.close();
1342-
f.close();
1320+
pw.println(file.toString());
1321+
if(mItems == null){
13431322
Toast toast =
13441323
Toast.makeText(
13451324
getApplicationContext(),
1346-
"MediaItems saved to " + file.getAbsolutePath(),
1325+
"No media items found, could not save tree.",
13471326
Toast.LENGTH_LONG);
13481327
toast.setMargin(50, 50);
13491328
toast.show();
1329+
return;
1330+
}
1331+
pw.println("Root:");
1332+
Semaphore writeCompleted = new Semaphore(1);
1333+
ExecutorService executorService = Executors.newFixedThreadPool(4);
1334+
executorService.execute(new Runnable() {
1335+
@Override
1336+
public void run() {
1337+
for (MediaBrowserCompat.MediaItem item : mItems) {
1338+
try {
1339+
writeCompleted.acquire();
1340+
} catch (InterruptedException e) {
1341+
e.printStackTrace();
1342+
}
1343+
writeMediaItemToFile(item, pw, 1, executorService);
1344+
writeCompleted.release();
1345+
1346+
}
1347+
1348+
Log.i(TAG, "CLOSING FILE");
1349+
pw.flush();
1350+
pw.close();
1351+
try {
1352+
f.close();
1353+
} catch (IOException e) {
1354+
e.printStackTrace();
1355+
}
1356+
runOnUiThread(new Runnable() {
1357+
public void run() {
1358+
Toast toast =
1359+
Toast.makeText(
1360+
getApplicationContext(),
1361+
"MediaItems saved to " + file.getAbsolutePath(),
1362+
Toast.LENGTH_LONG);
1363+
toast.setMargin(50, 50);
1364+
toast.show();
1365+
}
1366+
});
1367+
}});
13501368
} catch (FileNotFoundException e) {
13511369
e.printStackTrace();
1352-
} catch (IOException e) {
1353-
e.printStackTrace();
13541370
}
13551371
});
13561372
}
13571373

13581374
}
13591375

1376+
@RequiresApi(api = Build.VERSION_CODES.N)
1377+
private void writeMediaItemToFile(MediaItem mediaItem, PrintWriter printWriter, int depth, ExecutorService executorService){
1378+
if(mediaItem != null) {
1379+
MediaDescriptionCompat descriptionCompat = mediaItem.getDescription();
1380+
if (descriptionCompat != null) {
1381+
1382+
// Tab the media item to the respective depth
1383+
String tabStr = new String(new char[depth]).replace("\0", "\t");
1384+
1385+
String titleStr = descriptionCompat.getTitle() != null
1386+
? descriptionCompat.getTitle().toString()
1387+
: "NAN";
1388+
String subTitleStr = descriptionCompat.getSubtitle() != null
1389+
? descriptionCompat.getSubtitle().toString()
1390+
: "NAN";
1391+
String mIDStr = descriptionCompat.getMediaId() != null
1392+
? descriptionCompat.getMediaId().toString()
1393+
: "NAN";
1394+
String uriStr = descriptionCompat.getMediaUri() != null
1395+
? descriptionCompat.getMediaUri().toString()
1396+
: "NAN";
1397+
String desStr = descriptionCompat.getDescription() != null
1398+
? descriptionCompat.getDescription().toString()
1399+
: "NAN";
1400+
String infoStr = String.format("%sTitle:%s,Subtitle:%s,MediaId:%s,URI:%s,Description:%s", tabStr, titleStr, subTitleStr, mIDStr, uriStr, desStr);
1401+
Log.i(TAG, "Logging media item: " + infoStr + " at depth: " + depth);
1402+
printWriter.println(infoStr);
1403+
}
1404+
if (mediaItem.isBrowsable()) {
1405+
Log.i(TAG, "Media Item is browseable");
1406+
Semaphore loaded = new Semaphore(1);
1407+
try {
1408+
loaded.acquire();
1409+
} catch (InterruptedException e) {
1410+
e.printStackTrace();
1411+
}
1412+
final List<MediaItem> mChildren = new ArrayList<MediaItem>();
1413+
executorService.execute(new Runnable() {
1414+
@Override
1415+
public void run() {
1416+
mBrowser.subscribe(mediaItem.getMediaId(), new MediaBrowserCompat.SubscriptionCallback() {
1417+
@Override
1418+
public void onChildrenLoaded(@NonNull String parentId, @NonNull List<MediaItem> children) {
1419+
Log.i(TAG, "Children loaded");
1420+
mChildren.addAll(children);
1421+
loaded.release();
1422+
super.onChildrenLoaded(parentId, children);
1423+
}
1424+
});
1425+
}
1426+
});
1427+
1428+
try {
1429+
loaded.acquire();
1430+
} catch (InterruptedException e) {
1431+
e.printStackTrace();
1432+
}
1433+
Log.i(TAG, "Childeren finished loading");
1434+
for (MediaItem mediaItemChild : mChildren) {
1435+
writeMediaItemToFile(mediaItemChild, printWriter, depth + 1, executorService);
1436+
}
1437+
}
1438+
}
1439+
1440+
}
1441+
13601442
protected void subscribe() {
13611443
if (mNodes.size() > 0) {
13621444
mBrowser.subscribe(mNodes.peek(), callback);

0 commit comments

Comments
 (0)