Can I Disable text notification noise Android Studio - java

So I am in the process of developing an app that would silence texting notifications (sending the message straight to the inbox maybe)
I am using Lollipop.
Is there code out there that would make this possible?
Here is what i have got thus far.
FIRST JAVA CLASS
public class NoNotification extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
abortBroadcast();
}
}
SECOND JAVA FILE
private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";
private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";
public static boolean isNotificationEnabled(Context context) {
AppOpsManager mAppOps = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
ApplicationInfo appInfo = context.getApplicationInfo();
String pkg = context.getApplicationContext().getPackageName();
int uid = appInfo.uid;
Class appOpsClass = null; /* Context.APP_OPS_MANAGER */
try {
appOpsClass = Class.forName(AppOpsManager.class.getName());
Method checkOpNoThrowMethod = appOpsClass.getMethod(CHECK_OP_NO_THROW, Integer.TYPE, Integer.TYPE, String.class);
Field opPostNotificationValue = appOpsClass.getDeclaredField(OP_POST_NOTIFICATION);
int value = (int)opPostNotificationValue.get(Integer.class);
return ((int)checkOpNoThrowMethod.invoke(mAppOps,value, uid, pkg) == AppOpsManager.MODE_ALLOWED);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
return false;
}
}
Could I possibly be missing some permissions?
Thanks.

Related

How to extract try catch outside method?

I have this method sendParameterValueAsMQTTMessage() which I use to publish message via MQTT on a specific topic. I am using try catch two times after another (not nested) but it still seems somewhat ugly and overcrowding the method. I read an article on clean code where Uncle Bob talks about extracting the body of try catch but I seem to not grasp it quite well or at least not in my case.
How could I get rid of the try catch in my method by extracting it outside?
public void sendParameterValueAsMQTTMessage() {
String payload = null;
try {
payload = convertToJSONString("range", String.valueOf(range));
} catch (JSONException e) {
this.logger.log(Level.ERROR, e);
}
MQTTMessage message = new MQTTMessage(MQTTTopics.RANGE_TOPIC,payload,0);
try {
this.client.publish(message);
Thread.sleep(3000);
} catch (Exception e) {
this.logger.log(Level.ERROR, e);
}
}
there are multiple different problems with provided code, here is how I'd refactor it:
public void sendParameterValueAsMQTTMessage() {
final String payload = tryGetPayloadAsJson();
if (payload != null) {
trySendPayloadViaMQTT(payload);
}
}
private String tryGetPayloadAsJson() {
try {
return convertToJSONString("range", String.valueOf(range));
} catch (JSONException e) {
this.logger.log(Level.ERROR, e);
}
return null;
}
private void trySendPayloadViaMQTT(final String payload) {
try {
final MQTTMessage message = new MQTTMessage(MQTTTopics.RANGE_TOPIC, payload, 0);
this.client.publish(message);
Thread.sleep(3000);
} catch (Exception e) {
this.logger.log(Level.ERROR, e);
}
}
one thing which might be improved here based on Uncle Bob's advice is to actually move try/catch outside of trySendPayloadViaMQTT, like this:
public void sendParameterValueAsMQTTMessage() {
final String payload = tryGetPayloadAsJson();
if (payload != null) {
trySendPayloadViaMQTT(payload);
}
}
private String tryGetPayloadAsJson() {
try {
return convertToJSONString("range", String.valueOf(range));
} catch (JSONException e) {
this.logger.log(Level.ERROR, e);
}
return null;
}
private void trySendPayloadViaMQTT(final String payload) {
try {
sendPayloadViaMQTT(payload);
} catch (Exception e) {
this.logger.log(Level.ERROR, e);
}
}
private void sendPayloadViaMQTT(final String payload) {
final MQTTMessage message = new MQTTMessage(MQTTTopics.RANGE_TOPIC, payload, 0);
this.client.publish(message);
Thread.sleep(3000);
}
you can put all of your code in just one try block and set multiple catches, when ever an exception be happened, the catch that is revelated to it will be execute, like:
try{
int a[]=new int[5];
a[5]=30/0;
}
catch(ArithmeticException e)
{
System.out.println("Arithmetic Exception occurs");
}
catch(ArrayIndexOutOfBoundsException e)
{
System.out.println("ArrayIndexOutOfBounds Exception occurs");
}
You can use single general catch for both possible exceptions inside the method as following:
public void sendParameterValueAsMQTTMessage() {
String payload = null;
try {
payload = convertToJSONString("range", String.valueOf(range));
MQTTMessage message = new MQTTMessage(MQTTTopics.RANGE_TOPIC,payload,0);
this.client.publish(message);
Thread.sleep(3000);
} catch (Exception e) {
this.logger.log(Level.ERROR, e);
}
}
public void sendParameterValueAsMQTTMessage() {
String payload = null;
try {
payload = convertToJSONString("range", String.valueOf(range));
} catch (JSONException e) {
this.logger.log(Level.ERROR, e);
}
MQTTMessage message = new MQTTMessage(MQTTTopics.RANGE_TOPIC,payload,0);
publishMessage(message); //extracted in a new method
}
public void publishMessage(MQTTMessage message){
try {
this.client.publish(message);
Thread.sleep(3000);
} catch (Exception e) {
this.logger.log(Level.ERROR, e);
}
}

Interface null pointer exception in Network Callback onAvailable method

Below is my code, i tried to implement interface to intercept respond from Connectivity Manager Network Callback, but Android Studio is throwing error at this interface internetListener.onInternetStatusUpdate(true) in onAvailable method.
I also implemented this interface at my main activity. I follow a few example too but failed. Is it that onAvailable method, my interface is not reachable?
public class CheckInternetAsyncTask extends ConnectivityManager.NetworkCallback
{
private static final String TAG = "CheckInternetAsyncTask";
private Context context;
public InternetListener internetListener;
private ConnectivityManager connectivityManager;
private Network network;
private NetworkCapabilities networkCapabilities;
public interface InternetListener{
void onInternetStatusUpdate(boolean hasInternet);
}
public CheckInternetAsyncTask(Context _context) {
this.context = _context;
this.connectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
connectivityManager.registerDefaultNetworkCallback(this);
}
try {
new SendInternetRequest().execute().get(5, TimeUnit.SECONDS);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (TimeoutException e) {
e.printStackTrace();
}
}
public void TestInternetRequest(){
try {
new SendInternetRequest().execute().get(5, TimeUnit.SECONDS);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (TimeoutException e) {
e.printStackTrace();
}
}
#Override
public void onAvailable(Network network) {
super.onAvailable(network);
this.network = network;
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
connectivityManager.bindProcessToNetwork(network);
this.network = connectivityManager.getActiveNetwork();
}else{
ConnectivityManager.setProcessDefaultNetwork(network);
}
this.networkCapabilities = connectivityManager.getNetworkCapabilities(network);
if(networkCapabilities != null && networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) && networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)){
internetListener.onInternetStatusUpdate(true);
}else{
try {
new SendInternetRequest().execute().get(5, TimeUnit.SECONDS);
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (TimeoutException e) {
e.printStackTrace();
}
}
}
class SendInternetRequest extends AsyncTask<Void,Void, Void>{
private static final String TAG = "SendInternetRequest";
CheckInternetAsyncTask.InternetListener internetListener;
#Override
protected Void doInBackground(Void... voids) {
try {
Socket sock = new Socket();
sock.connect(new InetSocketAddress("8.8.8.8", 53), 1500);
sock.close();
internetListener.onInternetStatusUpdate(true);
} catch (IOException e) {
internetListener.onInternetStatusUpdate(false);
}
return null;
}
}
Stacktrace
2019-09-25 10:08:02.566 29555-29578/com.kioskactionandnotification E/AndroidRuntime: FATAL EXCEPTION: ConnectivityThread
Process: com.kioskactionandnotification, PID: 29555
java.lang.NullPointerException: Attempt to invoke interface method 'void com.kioskactionandnotification.Model.Helper.CheckInternetAsyncTask$InternetListener.onInternetStatusUpdate(boolean)' on a null object reference
at com.kioskactionandnotification.Model.Helper.CheckInternetAsyncTask.onAvailable(CheckInternetAsyncTask.java:85)
at android.net.ConnectivityManager$NetworkCallback.onAvailable(ConnectivityManager.java:2770)
at android.net.ConnectivityManager$CallbackHandler.handleMessage(ConnectivityManager.java:2969)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.os.HandlerThread.run(HandlerThread.java:65)
MainActivity.java
I implemented the interface
#Override
public void onInternetStatusUpdate(boolean hasInternet) {
this.hasInternet = hasInternet;
Log.d(TAG, "onInternetStatusUpdate: hasInternet : "+hasInternet);
}
That's all i have.
It seems like you're trying to access an uninitialized object of type internetListener.
You need to initialize it:
internetListener = new InternetListener();
Or check if it was already initialized:
if (internetListener != null) {
internetListener.onInternetStatusUpdate(true);
}
NOTE
Any abstract class you are using should be extended by a subclass that provides implementations for any of the abstract data/methods used from the abstract class.
Abstract class in Java
In my constructor below, i added a listener. Its basically my interface.
public CheckInternetAsyncTask(Context _context, InternetListener internetListener) {
this.context = _context;
this.internetListener = internetListener;
}
Then in my main activity where i am implementing this interfaces, I had to push "this" keyword, to my listener.
I am still studying the difference between context and "this" keyword and how they work on interfaces
new CheckInternetAsyncTask(context, this);
Reference: How to create our own Listener interface in android?

J2ME media player doesn't play

public class Midlet extends MIDlet implements CommandListener{
Player p;
public void startApp() {
Display.getDisplay(this).setCurrent(new SongsList(this));
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
notifyDestroyed();
}
public void commandAction(Command cmnd, Displayable dsplbl) {
if (cmnd.getLabel().equals("Exit"))
{
destroyApp(true);
}
else
{
try {
//InputStream is = getClass().getResourceAsStream("/res/getlucky.mpeg");
//p = Manager.createPlayer(is, "audio/mpeg");
p = Manager.createPlayer("http://puu.sh/6n9jC.mp3");
p.realize();
p.start();
} catch (IOException ex) {
ex.printStackTrace();
} catch (MediaException ex) {
ex.printStackTrace();
}
}
}
}
this is the songslist class :
public class SongsList extends List{
public SongsList(Midlet midlet)
{
super("Songs", List.IMPLICIT);
append("get lucky", null);
addCommand(new Command("Exit", Command.EXIT, 0));
addCommand(new Command("Select", Command.OK, 0));
setCommandListener(midlet);
}
}
tried use via file stored in project (its under src/res):
inputStream = getClass().getResourceAsStream("res/getlucky.mpg");
audioPlayer = Manager.createPlayer(inputStream, "audio/mpg");
as well as from HTTP:
//audioPlayer = Manager.createPlayer("http://puu.sh/6n9jC.mp3");
Nothing works, what am I doing wrong?
EDIT:
I've tried to delete my application and just copy paste it to a new project and it worked for some reason.. now I encounter new problems:
1) I try to play a song - this is the link http://puu.sh/6n9jC.mp3
its not playing so I guess there's a limited file size for what can be played can someone tell me what is this limit ?
2) Im trying to record the audio with RecordPlayer but its always null
public AudioAnalyzer()
{
try {
thread = new Thread(this);
recordFinished = false;
//inputStream = getClass().getResourceAsStream("res/getlucky.mpg");
//audioPlayer = Manager.createPlayer(inputStream, "audio/mpg");
audioPlayer = Manager.createPlayer("http://puu.sh/35YTG.mp3");
//audioPlayer = Manager.createPlayer("http://puu.sh/6n9jC.mp3");
audioPlayer.realize();
System.out.println(System.getProperty("supports.audio.capture"));
recordControl = (RecordControl)audioPlayer.getControl("RecordControl");
recordOutput = new ByteArrayOutputStream();
recordControl.setRecordStream(recordOutput);
recordControl.startRecord();
audioPlayer.start();
//thread.start();
} catch (MediaException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
}
I even tried to print if the system is supporting audio capture and the result were true but I get NullPointException at this line :
recordOutput = new ByteArrayOutputStream();
although I tried to get the recordcontrol from the player it is still null :
recordControl = (RecordControl)audioPlayer.getControl("RecordControl");
I think I read that it'll always give NullPointerException unless you run it on a real device and not an emulator is that true ? can someone verify it ? and if so what can I do if I don't own a device currently any other way to use recordcontrol feature in emulator (assuming recordcontrol isn't working on emulators).
File size is 8MB (maybe play on your phone), try to this code
public void initMedia(final String aFileUrl) {
if (m_player == null) {
try {
m_player = Manager.createPlayer(aFileUrl);
m_player.addPlayerListener(this);
m_player.realize();
m_player.prefetch();
m_volumeControl = (VolumeControl) m_player.getControl("VolumeControl");
} catch (IOException ex) {
} catch (Exception ex) {
} catch (OutOfMemoryError e) {
}
}
}
In your code, i guess you miss "m_player.prefetch()", try this. And print your Exception message...
This code in general for file, resourcce, http...
public void initMedia(final String aProtocol, final String aMediaSource) {
if (m_player == null) {
try {
if (aMediaSource.indexOf("file://") == 0) {
InputStream iRecordStream = Connector.openInputStream(aMediaSource);
m_player = Manager.createPlayer(iRecordStream, "audio/amr");
} else {
m_player = Manager.createPlayer(aProtocol);
}
m_player.addPlayerListener(this);
m_player.realize();
boolean isPrefetch = true;
try {
m_player.prefetch();
} catch (Exception ex) {
isPrefetch = false;
}
// trick to pass prefetch error
if (!isPrefetch) {
if (m_player != null) {
m_player.close();
m_player = null;
}
if (aMediaSource.indexOf("file://") == 0) {
InputStream iRecordStream = Connector.openInputStream(aMediaSource);
m_player = Manager.createPlayer(iRecordStream, "audio/amr");
} else {
m_player = Manager.createPlayer(aProtocol);
}
m_player.addPlayerListener(this);
m_player.realize();
m_player.prefetch();
}
m_volumeControl = (VolumeControl) m_player.getControl("VolumeControl");
} catch (IOException ex) {
} catch (Exception ex) {
} catch (OutOfMemoryError e) {
}
}
}
In general when it comes to J2ME development, you should always test your app on multiple real devices.
Emulators can't be trusted.
Also, J2ME is very fragmented, and various devices have various bugs and behaves differently with the same code. This will affect any app on many areas. One area being audio playback.
For example, some devices requires that you use the realize() and prefetch() methods, while other devices will crash if you use prefetch(). The only possible solution (if you wish to support as many devices as possible) is to use multiple try/catch blocks.
See this link for a detailed explanation and other tips'n'tricks on audio playback with MIDP2.0
http://indiegamemusic.com/help.php?id=1

NoSuchMethodException loading Build.getRadioVersion() using reflection

I'm trying to load the radio version of the Android device using reflection. I need to do this because my SDK supports back to API 7, but Build.RADIO was added in API 8, and Build.getRadioVersion() was added in API 14.
// This line executes fine, but is deprecated in API 14
String radioVersion = Build.RADIO;
// This line executes fine, but is deprecated in API 14
String radioVersion = (String) Build.class.getField("RADIO").get(null);
// This line executes fine.
String radioVersion = Build.getRadioVersion();
// This line throws a MethodNotFoundException.
Method method = Build.class.getMethod("getRadioVersion", String.class);
// The rest of the attempt to call getRadioVersion().
String radioVersion = method.invoke(null).toString();
I'm probably doing something wrong here. Any ideas?
Try this:
try {
Method getRadioVersion = Build.class.getMethod("getRadioVersion");
if (getRadioVersion != null) {
try {
String version = (String) getRadioVersion.invoke(Build.class);
// Add your implementation here
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
Log.wtf(TAG, "getMethod returned null");
}
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
What Build.getRadioVersion() actually does is return the value of gsm.version.baseband system property. Check Build and TelephonyProperties sources:
static final String PROPERTY_BASEBAND_VERSION = "gsm.version.baseband";
public static String getRadioVersion() {
return SystemProperties.get(TelephonyProperties.PROPERTY_BASEBAND_VERSION, null);
}
According to AndroidXref this property is available even in API 4. Thus you may get it on any version of Android through SystemProperties using the reflection:
public static String getRadioVersion() {
return getSystemProperty("gsm.version.baseband");
}
// reflection helper methods
static String getSystemProperty(String propName) {
Class<?> clsSystemProperties = tryClassForName("android.os.SystemProperties");
Method mtdGet = tryGetMethod(clsSystemProperties, "get", String.class);
return tryInvoke(mtdGet, null, propName);
}
static Class<?> tryClassForName(String className) {
try {
return Class.forName(className);
} catch (ClassNotFoundException e) {
return null;
}
}
static Method tryGetMethod(Class<?> cls, String name, Class<?>... parameterTypes) {
try {
return cls.getDeclaredMethod(name, parameterTypes);
} catch (Exception e) {
return null;
}
}
static <T> T tryInvoke(Method m, Object object, Object... args) {
try {
return (T) m.invoke(object, args);
} catch (InvocationTargetException e) {
throw new RuntimeException(e.getTargetException());
} catch (Exception e) {
return null;
}
}

How restart bluetooth service in bluecove?

I have desktop and android applications, which connected by bluetooth(in desktop side I use Bluecove 2.1.1 library). Desktop application create bluetooth service then android application connects to it. I want to add logout functionality from both desktop and android sides. For example in desktop app user click disconnect, both desktop and android apps reset their connections and should be able to connect again. Here is bluetoothService code for desktop side:
public class BluetoothService
{
private static final String serviceName = "btspp://localhost:"
// + new UUID("0000110100001000800000805F9B34F7", false).toString()
// + new UUID("0000110100001000800000805F9B34F8", false).toString()
+ new UUID("0000110100001000800000805F9B34F9", false).toString()
+ ";name=serviceName";
private StreamConnectionNotifier m_service = null;
private ListenerThread m_listenerThread;
private DataOutputStream m_outStream;
public BluetoothService()
{
Open();
}
public void Open()
{
try
{
assert (m_service == null);
m_service = (StreamConnectionNotifier) Connector.open(serviceName);
}
catch (IOException e)
{
e.printStackTrace();
}
}
public void Start()
{
try
{
StreamConnection connection = (StreamConnection) m_service
.acceptAndOpen();
System.out.println("Connected");
m_listenerThread = new ListenerThread(connection);
Thread listener = new Thread(m_listenerThread);
listener.start();
m_outStream = new DataOutputStream(connection.openOutputStream());
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void Send(String message)
{
assert (m_listenerThread != null);
try
{
m_outStream.writeUTF(message);
m_outStream.flush();
System.out.println("Sent: " + message);
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void Close()
{
try
{
m_service.close();
m_listenerThread.Stop();
m_listenerThread = null;
m_outStream.close();
m_outStream = null;
m_service = null;
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
class ListenerThread implements Runnable
{
private DataInputStream m_inStream;
private boolean m_isRunning;
public ListenerThread(StreamConnection connection)
{
try
{
this.m_inStream = new DataInputStream(connection.openInputStream());
m_isRunning = true;
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
;
}
public void run()
{
while (m_isRunning)
{
try
{
assert (m_inStream != null);
if (m_inStream.available() > 0)
{
String message = m_inStream.readUTF();
System.out.println("Received command: " + message);
CommandManager.getInstance().Parse(message);
}
}
catch (IOException e)
{
System.err.println(e.toString());
}
}
}
public void Stop()
{
m_isRunning = false;
try
{
m_inStream.close();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
for restarting service I do:
BluetoothService::Close();
BluetoothService::Open();
BluetoothService::Start();
but seems I cannot reconnect. Maybe I should create service with different name?

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