detect bluetooth Le devices in Android

Question

I\'m a beginner in android app development. I\'ve tried reading the documentation but am getting nowhere (functions in Android\'s tutorial such as StartLeScan() hav

Answer 1

I also thought this problem for few hours and I found out the answer by searching the Official doc.
You need to know 3 class and method ScanCallback,BluetoothLeScanner,ScanResult
//my level is so low that I cannot post the link....
You can see in the android developer web ,the web page would show Added in API level 21" on the right side.

Here is my code , modified from these project

//declare    
private BluetoothLeScanner mBluetoothLeScanner;  
mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();

//start and stop scan
mBluetoothLeScanner.startScan(mScanCallback);
mBluetoothLeScanner.stopScan(mScanCallback);

//Scan call back function
private ScanCallback mScanCallback = new ScanCallback() {
    @Override
    public void onScanResult(int callbackType, ScanResult result) {
         super.onScanResult(callbackType, result);
         mLeDeviceListAdapter.addDevice(result.getDevice());
         mLeDeviceListAdapter.notifyDataSetChanged();
    }
};

my grandle:

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        applicationId "com.polkapolka.bluetooth.le"
        minSdkVersion 21
        targetSdkVersion 22
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
}

These code works well on my phone,which is API 21 Hope it help you.