连接或断开蓝牙键盘时，手机会重新搜索蓝牙设备

来源：互联网发布：淘宝腔调设计师编辑：程序博客网时间：2024/05/16 02:10

点击Forget的逻辑如下：

public void onClick(DialogInterface dialog, int which) {switch (which) {case DialogInterface.BUTTON_POSITIVE:System.out.println("ran.zhou-DPS-L139-Click OK Button");EditText deviceName = (EditText) mRootView.findViewById(R.id.name);mCachedDevice.setName(deviceName.getText().toString());break;case DialogInterface.BUTTON_NEGATIVE:System.out.println("ran.zhou-DPS-L144-Click Forget Button");mCachedDevice.unpair();com.android.settings.bluetooth.Utils.updateSearchIndex(getContext(),BluetoothSettings.class.getName(), mCachedDevice.getName(),getString(R.string.bluetooth_settings),R.drawable.ic_settings_bluetooth, false);break;}}

蓝牙扫描逻辑如下：

private void startScanning() {System.out.println("ran.zhou-BS-L290-startScanning");if (isUiRestricted()) {return;}if (!mAvailableDevicesCategoryIsPresent) {getPreferenceScreen().addPreference(mAvailableDevicesCategory);mAvailableDevicesCategoryIsPresent = true;}if (mAvailableDevicesCategory != null) {setDeviceListGroup(mAvailableDevicesCategory);removeAllDevices();}mLocalManager.getCachedDeviceManager().clearNonBondedDevices();mAvailableDevicesCategory.removeAll();mInitialScanStarted = true;mLocalAdapter.startScanning(true);}

mtk6797/packages/apps/Settings / src/com/android/settings/bluetooth/BluetoothSettings.java

    @Override    public void onActivityCreated(Bundle savedInstanceState) {        super.onActivityCreated(savedInstanceState);        mInitialScanStarted = false;        mInitiateDiscoverable = true;        mEmptyView = (TextView) getView().findViewById(android.R.id.empty);        getListView().setEmptyView(mEmptyView);        mEmptyView.setGravity(Gravity.START | Gravity.CENTER_VERTICAL);        final SettingsActivity activity = (SettingsActivity) getActivity();        mSwitchBar = activity.getSwitchBar();        mBluetoothEnabler = new BluetoothEnabler(activity, mSwitchBar);        mBluetoothEnabler.setupSwitchBar();    }

以上方法中的mInitialScanStarted属性设置有问题，此处写死了为false，所以导致在后面引用的时候有一个判断，重新走进了扫描的流程。

解决方案：

mInitialScanStarted = false; 改为mInitialScanStarted = (savedInstanceState != null);

0 0