(resolvation of conflict Android API version)
0.Intention:
Generally speaking, almost every Andorid Plotting 3 party library, each release restricts to specified Android API version.
My application needs to combine BLE with Data-Plotting function.
Most time I use GraphView as plotting library, which is easy to modify.
GraphView latest release ver 4.2.2 run on API 27.1.1,
but newest BLE example only update to API 27.0.2
This example combine them together.
Files to Modify：
1.app/bulid.gradle (import graphView library)
downgrade graphView version to 4.0.0
2.DeviceControlActivity.java
add in import statement
add in DeviceControlActivity extends Activity
add in onCreate funciton
add initGraph function
add in onResume ,
add getRandom (random y-axis as input)
3.gatt_services_characteristics.xml (for graph layout)
here is the result:
MOdify code:
app/build.gradle
buildscript {
repositories {
jcenter()
google()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.3.0'
}
}
apply plugin: 'com.android.application'
repositories {
jcenter()
google()
}
dependencies {
compile "com.android.support:support-v4:27.0.2"
compile "com.android.support:support-v13:27.0.2"
compile "com.android.support:cardview-v7:27.0.2"
compile "com.android.support:appcompat-v7:27.0.2"
//#GraphView
compile "com.jjoe64:graphview:4.0.0"
}
// The sample build uses multiple directories to
// keep boilerplate and common code separate from
// the main sample code.
List<String> dirs = [
'main', // main sample code; look here for the interesting stuff.
'common', // components that are reused by multiple samples
'template'] // boilerplate code that is generated by the sample template process
android {
compileSdkVersion 27
buildToolsVersion "27.0.2"
defaultConfig {
minSdkVersion 18
targetSdkVersion 27
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_7
targetCompatibility JavaVersion.VERSION_1_7
}
sourceSets {
main {
dirs.each { dir ->
java.srcDirs "src/${dir}/java"
res.srcDirs "src/${dir}/res"
}
}
androidTest.setRoot('tests')
androidTest.java.srcDirs = ['tests/src']
}
}
DeviceControlActivity.java
/* * Copyright (C) 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.example.android.bluetoothlegatt; import android.app.Activity; import android.bluetooth.BluetoothGattCharacteristic; import android.bluetooth.BluetoothGattService; import android.content.BroadcastReceiver; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.ServiceConnection; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ExpandableListView; import android.widget.SimpleExpandableListAdapter; import android.widget.TextView; import java.util.ArrayList; import java.util.HashMap; import java.util.List; //#graphView import com.jjoe64.graphview.GraphView; import com.jjoe64.graphview.series.DataPoint; import com.jjoe64.graphview.series.LineGraphSeries; import com.jjoe64.graphview.GridLabelRenderer; import java.util.Random; /** * For a given BLE device, this Activity provides the user interface to connect, display data, * and display GATT services and characteristics supported by the device. The Activity * communicates with {@code BluetoothLeService}, which in turn interacts with the * Bluetooth LE API. */ public class DeviceControlActivity extends Activity { private final static String TAG = DeviceControlActivity.class.getSimpleName(); public static final String EXTRAS_DEVICE_NAME = "DEVICE_NAME"; public static final String EXTRAS_DEVICE_ADDRESS = "DEVICE_ADDRESS"; private TextView mConnectionState; private TextView mDataField; private String mDeviceName; private String mDeviceAddress; private ExpandableListView mGattServicesList; private BluetoothLeService mBluetoothLeService; private ArrayList<ArrayList<BluetoothGattCharacteristic>> mGattCharacteristics = new ArrayList<ArrayList<BluetoothGattCharacteristic>>(); private boolean mConnected = false; private BluetoothGattCharacteristic mNotifyCharacteristic; private final String LIST_NAME = "NAME"; private final String LIST_UUID = "UUID"; //#graphView private final Handler mHandler = new Handler(); private Runnable mTimer; private double graphLastXValue = 5d; private LineGraphSeries<DataPoint> mSeries; // Code to manage Service lifecycle. private final ServiceConnection mServiceConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName componentName, IBinder service) { mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService(); if (!mBluetoothLeService.initialize()) { Log.e(TAG, "Unable to initialize Bluetooth"); finish(); } // Automatically connects to the device upon successful start-up initialization. mBluetoothLeService.connect(mDeviceAddress); } @Override public void onServiceDisconnected(ComponentName componentName) { mBluetoothLeService = null; } }; // Handles various events fired by the Service. // ACTION_GATT_CONNECTED: connected to a GATT server. // ACTION_GATT_DISCONNECTED: disconnected from a GATT server. // ACTION_GATT_SERVICES_DISCOVERED: discovered GATT services. // ACTION_DATA_AVAILABLE: received data from the device. This can be a result of read // or notification operations. private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { final String action = intent.getAction(); if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) { mConnected = true; updateConnectionState(R.string.connected); invalidateOptionsMenu(); } else if (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) { mConnected = false; updateConnectionState(R.string.disconnected); invalidateOptionsMenu(); clearUI(); } else if (BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED.equals(action)) { // Show all the supported services and characteristics on the user interface. displayGattServices(mBluetoothLeService.getSupportedGattServices()); } else if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) { displayData(intent.getStringExtra(BluetoothLeService.EXTRA_DATA)); } } }; // If a given GATT characteristic is selected, check for supported features. This sample // demonstrates 'Read' and 'Notify' features. See // http://d.android.com/reference/android/bluetooth/BluetoothGatt.html for the complete // list of supported characteristic features. private final ExpandableListView.OnChildClickListener servicesListClickListner = new ExpandableListView.OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { if (mGattCharacteristics != null) { final BluetoothGattCharacteristic characteristic = mGattCharacteristics.get(groupPosition).get(childPosition); final int charaProp = characteristic.getProperties(); if ((charaProp | BluetoothGattCharacteristic.PROPERTY_READ) > 0) { // If there is an active notification on a characteristic, clear // it first so it doesn't update the data field on the user interface. if (mNotifyCharacteristic != null) { mBluetoothLeService.setCharacteristicNotification( mNotifyCharacteristic, false); mNotifyCharacteristic = null; } mBluetoothLeService.readCharacteristic(characteristic); } if ((charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) { mNotifyCharacteristic = characteristic; mBluetoothLeService.setCharacteristicNotification( characteristic, true); } return true; } return false; } }; private void clearUI() { mGattServicesList.setAdapter((SimpleExpandableListAdapter) null); mDataField.setText(R.string.no_data); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.gatt_services_characteristics); final Intent intent = getIntent(); mDeviceName = intent.getStringExtra(EXTRAS_DEVICE_NAME); mDeviceAddress = intent.getStringExtra(EXTRAS_DEVICE_ADDRESS); // Sets up UI references. ((TextView) findViewById(R.id.device_address)).setText(mDeviceAddress); mGattServicesList = (ExpandableListView) findViewById(R.id.gatt_services_list); mGattServicesList.setOnChildClickListener(servicesListClickListner); mConnectionState = (TextView) findViewById(R.id.connection_state); mDataField = (TextView) findViewById(R.id.data_value); getActionBar().setTitle(mDeviceName); getActionBar().setDisplayHomeAsUpEnabled(true); Intent gattServiceIntent = new Intent(this, BluetoothLeService.class); bindService(gattServiceIntent, mServiceConnection, BIND_AUTO_CREATE); //#graphView https://github.com/jjoe64/GraphView GraphView graph = (GraphView) findViewById(R.id.graph); initGraph(graph); } public void initGraph(GraphView graph) { graph.getViewport().setXAxisBoundsManual(true); graph.getViewport().setMinX(0); graph.getViewport().setMaxX(4); graph.getViewport().setYAxisBoundsManual(true); graph.getViewport().setMinY(0); graph.getViewport().setMaxY(42); graph.getViewport().setScrollable(true); // enables horizontal scrolling graph.getViewport().setScalable(true); // enables horizontal zooming and scrolling //graph.getGridLabelRenderer().setLabelVerticalWidth(100); GridLabelRenderer gridLabel = graph.getGridLabelRenderer(); gridLabel.setHorizontalAxisTitle("x axis"); gridLabel.setVerticalAxisTitle("y axis"); // first mSeries is a line mSeries = new LineGraphSeries<>(); mSeries.setDrawDataPoints(true); mSeries.setDrawBackground(true); graph.addSeries(mSeries); } @Override protected void onResume() { super.onResume(); registerReceiver(mGattUpdateReceiver, makeGattUpdateIntentFilter()); if (mBluetoothLeService != null) { final boolean result = mBluetoothLeService.connect(mDeviceAddress); Log.d(TAG, "Connect request result=" + result); } //#graphView mTimer = new Runnable() { @Override public void run() { graphLastXValue += 1.0; /*mSeries.appendData(new DataPoint(graphLastXValue, getRandom()+speed_num), true, 22);*/ mSeries.appendData(new DataPoint(graphLastXValue, getRandom()), true, 22); mHandler.postDelayed(this, 330); } }; mHandler.postDelayed(mTimer, 1500); } //#graphView double mLastRandom = 2; Random mRand = new Random(); private double getRandom() { mLastRandom += mRand.nextDouble()*0.05 - 0.05; return mLastRandom ; } @Override protected void onPause() { super.onPause(); unregisterReceiver(mGattUpdateReceiver); } @Override protected void onDestroy() { super.onDestroy(); unbindService(mServiceConnection); mBluetoothLeService = null; } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.gatt_services, menu); if (mConnected) { menu.findItem(R.id.menu_connect).setVisible(false); menu.findItem(R.id.menu_disconnect).setVisible(true); } else { menu.findItem(R.id.menu_connect).setVisible(true); menu.findItem(R.id.menu_disconnect).setVisible(false); } return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch(item.getItemId()) { case R.id.menu_connect: mBluetoothLeService.connect(mDeviceAddress); return true; case R.id.menu_disconnect: mBluetoothLeService.disconnect(); return true; case android.R.id.home: onBackPressed(); return true; } return super.onOptionsItemSelected(item); } private void updateConnectionState(final int resourceId) { runOnUiThread(new Runnable() { @Override public void run() { mConnectionState.setText(resourceId); } }); } private void displayData(String data) { if (data != null) { mDataField.setText(data); } } // Demonstrates how to iterate through the supported GATT Services/Characteristics. // In this sample, we populate the data structure that is bound to the ExpandableListView // on the UI. private void displayGattServices(List<BluetoothGattService> gattServices) { if (gattServices == null) return; String uuid = null; String unknownServiceString = getResources().getString(R.string.unknown_service); String unknownCharaString = getResources().getString(R.string.unknown_characteristic); ArrayList<HashMap<String, String>> gattServiceData = new ArrayList<HashMap<String, String>>(); ArrayList<ArrayList<HashMap<String, String>>> gattCharacteristicData = new ArrayList<ArrayList<HashMap<String, String>>>(); mGattCharacteristics = new ArrayList<ArrayList<BluetoothGattCharacteristic>>(); // Loops through available GATT Services. for (BluetoothGattService gattService : gattServices) { HashMap<String, String> currentServiceData = new HashMap<String, String>(); uuid = gattService.getUuid().toString(); currentServiceData.put( LIST_NAME, SampleGattAttributes.lookup(uuid, unknownServiceString)); currentServiceData.put(LIST_UUID, uuid); gattServiceData.add(currentServiceData); ArrayList<HashMap<String, String>> gattCharacteristicGroupData = new ArrayList<HashMap<String, String>>(); List<BluetoothGattCharacteristic> gattCharacteristics = gattService.getCharacteristics(); ArrayList<BluetoothGattCharacteristic> charas = new ArrayList<BluetoothGattCharacteristic>(); // Loops through available Characteristics. for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) { charas.add(gattCharacteristic); HashMap<String, String> currentCharaData = new HashMap<String, String>(); uuid = gattCharacteristic.getUuid().toString(); currentCharaData.put( LIST_NAME, SampleGattAttributes.lookup(uuid, unknownCharaString)); currentCharaData.put(LIST_UUID, uuid); gattCharacteristicGroupData.add(currentCharaData); } mGattCharacteristics.add(charas); gattCharacteristicData.add(gattCharacteristicGroupData); } SimpleExpandableListAdapter gattServiceAdapter = new SimpleExpandableListAdapter( this, gattServiceData, android.R.layout.simple_expandable_list_item_2, new String[] {LIST_NAME, LIST_UUID}, new int[] { android.R.id.text1, android.R.id.text2 }, gattCharacteristicData, android.R.layout.simple_expandable_list_item_2, new String[] {LIST_NAME, LIST_UUID}, new int[] { android.R.id.text1, android.R.id.text2 } ); mGattServicesList.setAdapter(gattServiceAdapter); } private static IntentFilter makeGattUpdateIntentFilter() { final IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction(BluetoothLeService.ACTION_GATT_CONNECTED); intentFilter.addAction(BluetoothLeService.ACTION_GATT_DISCONNECTED); intentFilter.addAction(BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED); intentFilter.addAction(BluetoothLeService.ACTION_DATA_AVAILABLE); return intentFilter; } }
gatt_services_characteristics.xml
<?xml version="1.0" encoding="utf-8"?> <!-- Copyright (C) 2013 The Android Open Source Project Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp"> <LinearLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/label_device_address" android:textSize="18sp"/> <Space android:layout_width="5dp" android:layout_height="wrap_content"/> <TextView android:id="@+id/device_address" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="18sp"/> </LinearLayout> <LinearLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/label_state" android:textSize="18sp"/> <Space android:layout_width="5dp" android:layout_height="wrap_content"/> <TextView android:id="@+id/connection_state" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/disconnected" android:textSize="18sp"/> </LinearLayout> <LinearLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/label_data" android:textSize="18sp"/> <Space android:layout_width="5dp" android:layout_height="wrap_content"/> <TextView android:id="@+id/data_value" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/no_data" android:textSize="18sp"/> </LinearLayout> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content"> <com.jjoe64.graphview.GraphView android:id="@+id/graph" android:layout_width="match_parent" android:layout_height="180dp" /> </LinearLayout> <ExpandableListView android:id="@+id/gatt_services_list" android:layout_width="match_parent" android:layout_height="wrap_content"/> </LinearLayout>
ref:
1. https://github.com/jjoe64/GraphView
2. https://github.com/halfhp/androidplot/blob/master/demoapp/src/main/java/com/androidplot/demos/SimpleXYPlotActivity.java
3.https://mvnrepository.com/artifact/com.jjoe64/graphview
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