android.bluetooth.BluetoothAdapter#ACTION_REQUEST_ENABLE源码实例Demo

private void startBTAntiTheft() {
	//取得适配器
	if (mBluetoothAdapter == null){
		mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
	}
	if (mBluetoothAdapter == null){
		showMsg("蓝牙不可用");
		tvMsg.setText("蓝牙不可用");
	}else{
		if (!mBluetoothAdapter.isEnabled()) {
			showMsg("正在请求打开蓝牙");
            Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
        }else{
        	handleBondBTDevice();
        }
	}
}
 

@Override
protected void onResume() {
    super.onResume();

    // Ensures Bluetooth is enabled on the device.  If Bluetooth is not currently enabled,
    // fire an intent to display a dialog asking the user to grant permission to enable it.
    if (!mBluetoothAdapter.isEnabled()) {
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    }

    // Initializes list view adapter.
    mLeDeviceListAdapter = new LeDeviceListAdapter();
    setListAdapter(mLeDeviceListAdapter);
    scanLeDevice(true);
}
 

private boolean openBtDevice() {
        // 获得蓝牙匹配器
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        // 蓝牙设备不被支持
        if (mBluetoothAdapter == null) {
            Toast.makeText(getActivity(), "该设备没有蓝牙设备", Toast.LENGTH_LONG).show();
            return false;
        }

        // 蓝牙如果没打开，直接提示需要打开蓝牙
        if (!mBluetoothAdapter.isEnabled()) {
            // 隐式Intent
            Intent enableBtIntent = new Intent(
                    BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBtIntent, REQUES_BT_ENABLE_CODE);  //在onActivityResult有打开服务端线程的操作哦
        } else {
            // 如果蓝牙在运行本程序前已经人为打开，那么直接启动服务器端线程
            Toast.makeText(getActivity(), "蓝牙已经打开！	", Toast.LENGTH_LONG).show();
            //暂时不启动服务端线程，因为手机充当的总是客服端
//            mAcceptThread = new AcceptThread(mBluetoothAdapter,mHandler); // // // // // // // // // // // // // // // // // // // // // // // // //
//            mAcceptThread.start(); // // // // // // // // // // // // // // // //蓝牙提前打开就启动服务端线程？ // // // // // //
        }
        return true;
    }
 

/**
 * Turn on local bluetooth, calling the method will show users a request dialog
 * to grant or reject,so you can get the result from Activity#onActivityResult()
 *
 * @param activity    activity, note that to get the result whether users have granted
 *                    or rejected to enable bluetooth, you should handle the method
 *                    onActivityResult() of this activity
 * @param requestCode enable bluetooth request code
 */
public static void enableBluetooth(Activity activity, int requestCode) {
    if (activity == null || requestCode < 0) {
        return;
    }
    BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
    if (adapter != null && !adapter.isEnabled()) {
        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        activity.startActivityForResult(intent, requestCode);
    }
}
 

@Override
protected void onResume() {
	super.onResume();
	registerReceiver(mBleReceiver, BleService.getIntentFilter());

	// Ensures Bluetooth is enabled on the device. If Bluetooth is not
	// currently enabled,
	// fire an intent to display a dialog asking the user to grant
	// permission to enable it.
	if (mBle != null && !mBle.adapterEnabled()) {
		Intent enableBtIntent = new Intent(
				BluetoothAdapter.ACTION_REQUEST_ENABLE);
		startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
	}

	// Initializes list view adapter.
	mLeDeviceListAdapter = new LeDeviceListAdapter();
	setListAdapter(mLeDeviceListAdapter);
	scanLeDevice(true);
}
 

public void scanDevice() {
    // Ensures Bluetooth is available on the device and it is enabled. If not,
    // displays a dialog requesting user permission to enable Bluetooth.
    if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    } else {
        deviceNames.clear();
        // Scanning Time out by Handler.
        // The device scanning needs high energy.
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                mBluetoothAdapter.stopLeScan(ListActivity.this);

                adapter.notifyDataSetChanged();
                Toast.makeText(getApplicationContext(), "Stop Device Scan", Toast.LENGTH_SHORT).show();

            }
        }, SCAN_PERIOD);
        mBluetoothAdapter.startLeScan(ListActivity.this);
    }
}
 

@Override
protected void onResume() {
    super.onResume();

    // Ensures Bluetooth is enabled on the device.  If Bluetooth is not currently enabled,
    // fire an intent to display a dialog asking the user to grant permission to enable it.
    if (!mBluetoothAdapter.isEnabled()) {
        if (!mBluetoothAdapter.isEnabled()) {
            Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
        }
    }

    // Initializes list view adapter.
    mLeDeviceListAdapter = new LeDeviceListAdapter();
    setListAdapter(mLeDeviceListAdapter);
    scanLeDevice(true);
}
 

public void startbt() {
    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    if (mBluetoothAdapter == null) {
        // Device does not support Bluetooth
        logthis("This device does not support bluetooth");
        return;
    }
    //make sure bluetooth is enabled.
    if (!mBluetoothAdapter.isEnabled()) {
        logthis("There is bluetooth, but turned off");
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    } else {
        logthis("The bluetooth is ready to use.");
    }
}
 

private void prepareForScan(){
    if(isBleSupported()) {
        final ParcelUuid uuid = NODE_CONFIGURATION_SERVICE;
        mScanFilterList = new ArrayList<>();
        mScanFilterList.add(new ScanFilter.Builder().setServiceUuid(uuid).build());
        mScanner = BluetoothLeScannerCompat.getScanner();

        if (checkIfVersionIsMarshmallowOrAbove()) {
            startLocationModeChangeReceiver();
            connectToGoogleApiClient();
        } else {
            if (!isBleEnabled()) {
                final Intent bluetoothEnable = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(bluetoothEnable, REQUEST_ENABLE_BT);
            } else {
                startLeScan();
            }
        }
    } else {
        showError(getString(R.string.ble_not_supported), false);
    }
}
 

/**
 * Ensures Bluetooth is available on the beacon and it is enabled. If not,
 * displays a dialog requesting user permission to enable Bluetooth.
 */
private void checkPermissions(BluetoothAdapter bluetoothAdapter) {
  // Acquire lock
  PermissionCheck.getInstance().setCheckingPermissions(true);
  if (!bluetoothAdapter.isEnabled()) {
    Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    return;
  }
  ensureLocationPermissionIsEnabled();
}
 

@Override
public void onResume() {
    super.onResume();
    Log.d(TAG, "onResume");
    if (!mBtAdapter.isEnabled()) {
        Log.i(TAG, "onResume - BT not enabled yet");
        Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
    }
 
}
 

@Override
public void onRefresh() {
    if (mBluetoothAdapter != null && mBluetoothAdapter.isEnabled()) {
        scanDevice();
    } else {
        Intent enableBtIntent = new Intent(
                BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    }
}
 

@Override
public void onCreate() {

    // Use this check to determine whether BLE is supported on the device. Then
    // you can selectively disable BLE-related features.
    if (!getPackageManager().hasSystemFeature(
            PackageManager.FEATURE_BLUETOOTH_LE)) {
        Toast.makeText(this, R.string.ble_not_supported, Toast.LENGTH_LONG)
                .show();
        mBleSupported = false;
    }

    // Initializes a Bluetooth adapter. For API level 18 and above, get a
    // reference to BluetoothAdapter through BluetoothManager.
    mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
    mBtAdapter = mBluetoothManager.getAdapter();

    // Checks if Bluetooth is supported on the device.
    if (mBtAdapter == null) {
        Toast.makeText(this, R.string.bt_not_supported, Toast.LENGTH_LONG).show();
        mBleSupported = false;
        return;
    }

    mFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
    registerReceiver(mReceiver, mFilter);

    if (!mBtAdapter.isEnabled()) {
        Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        enableIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(enableIntent);
    }

    startBluetoothLeService();

    super.onCreate();

}
 

/**
 * 打开蓝牙(默认模式--带系统弹出框)
 *
 * @param activity 上下文对象
 */
public void turnOnBlueTooth(Activity activity) {
    // Ensures Bluetooth is enabled on the device.  If Bluetooth is not currently enabled,
    // fire an intent to display a dialog asking the user to grant permission to enable it.
    if (!isBleEnable()) {
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        activity.startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    }
}
 

/**
 * The process for setting up bluetooth is as follows:
 * <ul>
 * <li>Assume we have bluetooth available (otherwise the button which allowed us to start
 * the bluetooth process should not have been available)</li>
 * <li>Ask user to enable (if not enabled yet)</li>
 * <li>Start bluetooth server socket</li>
 * <li>Enable bluetooth discoverability, so that people can connect to our server socket.</li>
 * </ul>
 * Note that this is a little different than the usual process for bluetooth _clients_, which
 * involves pairing and connecting with other devices.
 */
public void startBluetoothSwap() {
    if (bluetoothAdapter != null) {
        if (bluetoothAdapter.isEnabled()) {
            Utils.debugLog(TAG, "Bluetooth enabled, will check if device is discoverable with device.");
            ensureBluetoothDiscoverableThenStart();
        } else {
            Utils.debugLog(TAG, "Bluetooth disabled, asking user to enable it.");
            Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBtIntent, REQUEST_BLUETOOTH_ENABLE_FOR_SWAP);
        }
    }
}
 

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    switch(item.getItemId()){
        case R.id.action_start_scan:
            if (checkIfVersionIsMarshmallowOrAbove()) {
                if (mLocationServicesRequestApproved)
                    checkForLocationPermissionsAndScan();
                else {
                    createLocationRequestForResult();
                }
            } else {
                if (!isBleEnabled()) {
                    final Intent bluetoothEnable = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                    startActivityForResult(bluetoothEnable, REQUEST_ENABLE_BT);
                } else {
                    startLeScan();
                }
            }
            return true;
        case R.id.action_stop_scan:
            stopLeScan();
            return true;
        case R.id.action_configure_wifi:
            if(mScanning)
                stopLeScan();
            final Intent configureWifi = new Intent(this, ConfigureWifiActivity.class);
            startActivity(configureWifi);
            return true;
        case R.id.action_settings:
            if(mScanning)
                stopLeScan();
            final Intent settings = new Intent(this, AboutActivity.class);
            startActivity(settings);
            return true;
        case android.R.id.home:
            onBackPressed();
            return true;
    }

    return super.onOptionsItemSelected(item);
}
 

/**
 * Starts activity to enable bluetooth.
 */
private void enableBluetooth() {
    Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    startActivityForResult(enableBtIntent, RequestCodes.REQUEST_ENABLE_BT);
}
 

@Override
public void enableBluetooth() {
    Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    startActivityForResult(enableIntent, BT_ENABLE_REQUEST);
}
 

public void askUserToEnableBluetoothIfNeeded() {
    if (isBluetoothLeSupported() && (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled())) {
        final Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        mActivity.startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    }
}
 

/**
 * open system setting to open bluetooth
 * <p>Notification of the result of this activity is posted using the
 * {@link android.app.Activity#onActivityResult} callback. The
 * <code>resultCode</code>
 * will be {@link android.app.Activity#RESULT_OK} if Bluetooth has been
 * turned on or {@link android.app.Activity#RESULT_CANCELED} if the user
 * has rejected the request or an error has occurred.
 * @param mActivity
 */
public static void openBlueToothSetting(Activity mActivity){
    final Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    mActivity.startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}