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Broadcast Bluetooth state to OFF properly

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In current logic, we broadcast Bluetooth state OFF at BLE_ON state.
However, if Bluetooth gets crashed, we won't have the chance to send OFF
intent as we never get to BLE_ON.

This change makes the BluetoothManagerService skips the OFF intent only
if the previous state is a BLE state.

Bug: 189271317
Test: manual
Change-Id: I3936766ab8bdd45d59550dacb64bdc0323bb424d
Merged-In: I3936766ab8bdd45d59550dacb64bdc0323bb424d
This commit is contained in:
Ugo Yu
2021-06-02 14:30:37 +08:00
committed by Myles Watson
parent 9ef59ac901
commit 86a7fe21b1
1 changed files with 24 additions and 2 deletions
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26
services/core/java/com/android/server/BluetoothManagerService.java
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@@ -2452,6 +2452,16 @@ class BluetoothManagerService extends IBluetoothManager.Stub {
mContext.sendBroadcastAsUser(intent, UserHandle.ALL, BLUETOOTH_PERM);
}
private boolean isBleState(int state) {
switch (state) {
case BluetoothAdapter.STATE_BLE_ON:
case BluetoothAdapter.STATE_BLE_TURNING_ON:
case BluetoothAdapter.STATE_BLE_TURNING_OFF:
return true;
}
return false;
}
private void bluetoothStateChangeHandler(int prevState, int newState) {
boolean isStandardBroadcast = true;
if (prevState == newState) { // No change. Nothing to do.
@@ -2470,8 +2480,15 @@ class BluetoothManagerService extends IBluetoothManager.Stub {
sendBluetoothServiceDownCallback();
unbindAndFinish();
sendBleStateChanged(prevState, newState);
// Don't broadcast as it has already been broadcast before
isStandardBroadcast = false;
/* Currently, the OFF intent is broadcasted externally only when we transition
* from TURNING_OFF to BLE_ON state. So if the previous state is a BLE state,
* we are guaranteed that the OFF intent has been broadcasted earlier and we
* can safely skip it.
* Conversely, if the previous state is not a BLE state, it indicates that some
* sort of crash has occurred, moving us directly to STATE_OFF without ever
* passing through BLE_ON. We should broadcast the OFF intent in this case. */
isStandardBroadcast = !isBleState(prevState);
} else if (!intermediate_off) {
// connect to GattService
@@ -2524,6 +2541,11 @@ class BluetoothManagerService extends IBluetoothManager.Stub {
// Show prevState of BLE_ON as OFF to standard users
prevState = BluetoothAdapter.STATE_OFF;
}
if (DBG) {
Slog.d(TAG,
"Sending State Change: " + BluetoothAdapter.nameForState(prevState) + " > "
+ BluetoothAdapter.nameForState(newState));
}
Intent intent = new Intent(BluetoothAdapter.ACTION_STATE_CHANGED);
intent.putExtra(BluetoothAdapter.EXTRA_PREVIOUS_STATE, prevState);
intent.putExtra(BluetoothAdapter.EXTRA_STATE, newState);