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Possible fix for chart view.

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This commit is contained in:
Sandor Dornbush
2011-02-04 10:41:17 -08:00
parent 83997980ba
commit 4a47c096f7
1 changed files with 53 additions and 44 deletions
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MyTracks/src/com/google/android/apps/mytracks/ChartActivity.java
+53 -44
View File
@@ -163,49 +163,7 @@ public class ChartActivity extends Activity implements
private final Runnable updateTrackRunnable = new Runnable() {
@Override
public void run() {
Log.d(MyTracksConstants.TAG, "MyTracks: Updating chart.");
Track track = providerUtils.getTrack(recordingTrackId);
if (track == null) {
Log.w(MyTracksConstants.TAG, "MyTracks: track not found");
return;
}
Cursor cursor = null;
try {
cursor = providerUtils.getLocationsCursor(recordingTrackId,
lastSeenLocationId + 1,
MyTracksConstants.MAX_DISPLAYED_TRACK_POINTS - cv.getData().size(),
true);
if (cursor != null) {
if (cursor.moveToLast()) {
final int idColumnIdx =
cursor.getColumnIndexOrThrow(TrackPointsColumns._ID);
ArrayList<double[]> data = new ArrayList<double[]>();
// Need two locations so we can keep track of the last location.
Location location = new MyTracksLocation("");
do {
lastSeenLocationId = cursor.getLong(idColumnIdx);
providerUtils.fillLocation(cursor, location);
if (MyTracksUtils.isValidLocation(location)) {
double[] point = new double[6];
location = getDataPoint(location, track, point);
data.add(point);
}
} while (cursor.moveToPrevious());
cv.addDataPoints(data);
}
}
} catch (RuntimeException e) {
Log.w(MyTracksConstants.TAG, "Caught an unexpected exception.", e);
} finally {
if (cursor != null) {
cursor.close();
}
uiHandler.post(new Runnable() {
public void run() {
cv.invalidate();
}
});
}
updateTrackPoints();
}
};
@@ -589,8 +547,9 @@ public class ChartActivity extends Activity implements
/**
* Reads the track profile from the provider. This is a blocking function and
* should not be run from the UI thread.
* The reading methods are synchronized so that we don't read points multiple times.
*/
private void readProfile() {
private synchronized void readProfile() {
profileLength = 0;
lastLocation = null;
startTime = -1;
@@ -658,4 +617,54 @@ public class ChartActivity extends Activity implements
}
}
}
/**
* The reading methods are synchronized so that we don't read points multiple times.
*/
private synchronized void updateTrackPoints() {
Log.i(MyTracksConstants.TAG, "MyTracks: Updating chart last seen: " + lastSeenLocationId);
Track track = providerUtils.getTrack(recordingTrackId);
if (track == null) {
Log.w(MyTracksConstants.TAG, "MyTracks: track not found");
return;
}
Cursor cursor = null;
try {
cursor = providerUtils.getLocationsCursor(recordingTrackId,
lastSeenLocationId + 1,
MyTracksConstants.MAX_DISPLAYED_TRACK_POINTS - cv.getData().size(),
true);
if (cursor != null) {
if (cursor.moveToLast()) {
final int idColumnIdx =
cursor.getColumnIndexOrThrow(TrackPointsColumns._ID);
ArrayList<double[]> data = new ArrayList<double[]>();
// Need two locations so we can keep track of the last location.
Location location = new MyTracksLocation("");
do {
lastSeenLocationId = cursor.getLong(idColumnIdx);
providerUtils.fillLocation(cursor, location);
if (MyTracksUtils.isValidLocation(location)) {
double[] point = new double[6];
location = getDataPoint(location, track, point);
data.add(point);
}
} while (cursor.moveToPrevious());
cv.addDataPoints(data);
}
}
} catch (RuntimeException e) {
Log.w(MyTracksConstants.TAG, "Caught an unexpected exception.", e);
} finally {
if (cursor != null) {
cursor.close();
}
uiHandler.post(new Runnable() {
public void run() {
cv.invalidate();
}
});
}
Log.i(MyTracksConstants.TAG, "MyTracks: Updated chart last seen: " + lastSeenLocationId);
}
}