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Code Issues Releases Wiki Activity

Fix crash while granting BT permission

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Revert b3508ac1 and fix it proper. Fixes #244.
This commit is contained in:
Erik Johansson
2018-04-15 21:14:10 +02:00
parent fc93286815
commit aa0d0c0497
1 changed files with 45 additions and 36 deletions
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81
android_app/app/src/main/java/com/health/openscale/gui/preferences/BluetoothPreferences.java
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@@ -54,6 +54,7 @@ public class BluetoothPreferences extends PreferenceFragment {
private PreferenceScreen btScanner;
private BluetoothAdapter btAdapter = null;
private BluetoothAdapter.LeScanCallback leScanCallback = null;
private Handler handler = null;
private Map<String, BluetoothDevice> foundDevices = new HashMap<>();
@@ -86,23 +87,30 @@ public class BluetoothPreferences extends PreferenceFragment {
}
}, progressUpdatePeriod);
// Close any existing connection during the scan
OpenScale.getInstance(getActivity()).disconnectFromBluetoothDevice();
// Abort discovery and scan if back is pressed or a scale is selected
btScanner.getDialog().setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
handler.removeCallbacksAndMessages(null);
btAdapter.cancelDiscovery();
stopDiscoveryAndLeScan();
}
});
// Close any existing connection during the scan
OpenScale.getInstance(getActivity()).disconnectFromBluetoothDevice();
// Intent filter for the scanning process
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
getActivity().registerReceiver(mReceiver, filter);
// Do classic bluetooth discovery first and BLE scan afterwards
btAdapter.startDiscovery();
}
private void startBleScan() {
final BluetoothAdapter.LeScanCallback leScanCallback = new BluetoothAdapter.LeScanCallback() {
leScanCallback = new BluetoothAdapter.LeScanCallback() {
@Override
public void onLeScan(BluetoothDevice device, int rssi, byte[] scanRecord) {
onDeviceFound(device);
@@ -113,9 +121,7 @@ public class BluetoothPreferences extends PreferenceFragment {
handler.postDelayed(new Runnable() {
@Override
public void run() {
handler.removeCallbacksAndMessages(null);
btAdapter.stopLeScan(leScanCallback);
btScanner.getDialog().setOnDismissListener(null);
stopDiscoveryAndLeScan();
Preference scanning = btScanner.getPreference(0);
scanning.setTitle(R.string.label_bluetooth_searching_finished);
@@ -133,18 +139,28 @@ public class BluetoothPreferences extends PreferenceFragment {
}
}, 10 * 1000);
// Also cancel scan if dialog is dismissed
btScanner.getDialog().setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
handler.removeCallbacksAndMessages(null);
btAdapter.stopLeScan(leScanCallback);
}
});
btAdapter.startLeScan(leScanCallback);
}
private void stopDiscoveryAndLeScan() {
if (handler != null) {
handler.removeCallbacksAndMessages(null);
handler = null;
getActivity().unregisterReceiver(mReceiver);
btAdapter.cancelDiscovery();
}
if (leScanCallback != null) {
btAdapter.stopLeScan(leScanCallback);
leScanCallback = null;
}
if (btScanner.getDialog() != null) {
btScanner.getDialog().setOnDismissListener(null);
}
}
private void onDeviceFound(BluetoothDevice device) {
if (device.getName() == null || foundDevices.containsKey(device.getAddress())) {
return;
@@ -175,11 +191,6 @@ public class BluetoothPreferences extends PreferenceFragment {
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(final Context context, Intent intent) {
// May be called before the dialog is shown or while it is being dismissed
if (btScanner.getDialog() == null || !btScanner.getDialog().isShowing()) {
return;
}
String action = intent.getAction();
if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
@@ -236,25 +247,22 @@ public class BluetoothPreferences extends PreferenceFragment {
}
@Override
public void onResume() {
super.onResume();
public void onStart() {
super.onStart();
// Intent filter for the scanning process
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
getActivity().registerReceiver(mReceiver, filter);
// Restart discovery after e.g. orientation change
if (btScanner.getDialog() != null) {
startBluetoothDiscovery();
}
}
@Override
public void onPause() {
getActivity().unregisterReceiver(mReceiver);
public void onStop() {
if (btScanner.getDialog() != null) {
btScanner.getDialog().dismiss();
stopDiscoveryAndLeScan();
}
super.onPause();
super.onStop();
}
@Override
@@ -300,9 +308,10 @@ public class BluetoothPreferences extends PreferenceFragment {
switch (requestCode) {
case PermissionHelper.PERMISSIONS_REQUEST_ACCESS_COARSE_LOCATION: {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//startBluetoothDiscovery();
startBluetoothDiscovery();
} else {
Toast.makeText(getActivity(), R.string.permission_not_granted, Toast.LENGTH_SHORT).show();
btScanner.getDialog().dismiss();
}
break;
}