I am launching an activity to make a phone call, but when I pressed the 'end call' button, it does not go back to my activity. Can you please tell me how can I launch a call activity which comes back to me when 'End call' button is pressed? This is how I'm making the phone call:
String url = "tel:3334444";
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse(url));
use a PhoneStateListener to see when the call is ended. you will most likely need to trigger the listener actions to wait for a the call to start (wait until changed from PHONE_STATE_OFFHOOK to PHONE_STATE_IDLE again) and then write some code to bring your app back up on the IDLE state.
you may need to run the listener in a service to ensure it stays up and your app is restarted. some example code:
EndCallListener callListener = new EndCallListener();
TelephonyManager mTM = (TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
mTM.listen(callListener, PhoneStateListener.LISTEN_CALL_STATE);
Listener definition:
private class EndCallListener extends PhoneStateListener {
#Override
public void onCallStateChanged(int state, String incomingNumber) {
if(TelephonyManager.CALL_STATE_RINGING == state) {
Log.i(LOG_TAG, "RINGING, number: " + incomingNumber);
}
if(TelephonyManager.CALL_STATE_OFFHOOK == state) {
//wait for phone to go offhook (probably set a boolean flag) so you know your app initiated the call.
Log.i(LOG_TAG, "OFFHOOK");
}
if(TelephonyManager.CALL_STATE_IDLE == state) {
//when this state occurs, and your flag is set, restart your app
Log.i(LOG_TAG, "IDLE");
}
}
}
In your Manifest.xml file add the following permission:
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
This is regarding the question asked by Starter.
The problem with your code is that you are not passing the number properly.
The code should be:
private OnClickListener next = new OnClickListener() {
public void onClick(View v) {
EditText num=(EditText)findViewById(R.id.EditText01);
String number = "tel:" + num.getText().toString().trim();
Intent callIntent = new Intent(Intent.ACTION_CALL, Uri.parse(number));
startActivity(callIntent);
}
};
Do not forget to add the permission in manifest file.
<uses-permission android:name="android.permission.CALL_PHONE"></uses-permission>
or
<uses-permission android:name="android.permission.CALL_PRIVILEGED"></uses-permission>
for emergency number in case DIAL is used.
We had the same problem and managed to solve it by using a PhoneStateListener to identify when the call ends, but additionally we had to finish() the original activity before starting it again with startActivity, otherwise the call log would be in front of it.
I found the EndCallListener the most functional example, to get the behaviour described (finish(), call, restart) I added a few SharedPreferences so the Listener had a reference to manage this behaviour.
My OnClick, initialise and EndCallListener only respond to calls from app. Other calls ignored.
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
public class EndCallListener extends PhoneStateListener {
private String TAG ="EndCallListener";
private int LAUNCHED = -1;
SharedPreferences prefs = PreferenceManager
.getDefaultSharedPreferences(
myActivity.mApp.getBaseContext());
SharedPreferences.Editor _ed = prefs.edit();
#Override
public void onCallStateChanged(int state, String incomingNumber) {
String _prefKey = myActivity.mApp
.getResources().getString(R.string.last_phone_call_state_key),
_bPartyNumber = myActivity.mApp
.getResources().getString(R.string.last_phone_call_bparty_key);
int mLastCallState = prefs.getInt(_prefKey, LAUNCHED);
//Save current call sate for next call
_ed.putInt(_prefKey,state);
_ed.commit();
if(TelephonyManager.CALL_STATE_RINGING == state) {
Log.i(TAG, " >> RINGING, number: " + incomingNumber);
}
if(TelephonyManager.CALL_STATE_IDLE == state && mLastCallState != LAUNCHED ) {
//when this state occurs, and your flag is set, restart your app
if (incomingNumber.equals(_bPartyNumber) == true) {
//Call relates to last app initiated call
Intent _startMyActivity =
myActivity.mApp
.getPackageManager()
.getLaunchIntentForPackage(
myActivity.mApp.getResources()
.getString(R.string.figjam_package_path));
_startMyActivity.setAction(
myActivity.mApp.getResources()
.getString(R.string.main_show_phone_call_list));
myActivity.mApp
.startActivity(_startMyActivity);
Log.i(TAG, "IDLE >> Starting MyActivity with intent");
}
else
Log.i(TAG, "IDLE after calling "+incomingNumber);
}
}
}
add these to strings.xml
<string name="main_show_phone_call_list">android.intent.action.SHOW_PHONE_CALL_LIST</string>
<string name="last_phone_call_state_key">activityLpcsKey</string>
<string name="last_phone_call_bparty_key">activityLpbpKey</string>
and something like this in your Manifest if you need to return to the look and feel before the call
<activity android:label="#string/app_name" android:name="com.myPackage.myActivity"
android:windowSoftInputMode="stateHidden"
android:configChanges="keyboardHidden" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.SHOW_PHONE_CALL_LIST" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
and put these in your 'myActivity'
public static Activity mApp=null; //Before onCreate()
...
onCreate( ... ) {
...
if (mApp == null) mApp = this; //Links your resources to other classes
...
//Test if we've been called to show phone call list
Intent _outcome = getIntent();
String _phoneCallAction = mApp.getResources().getString(R.string.main_show_phone_call_list);
String _reqAction = _outcome.getAction();//Can be null when no intent involved
//Decide if we return to the Phone Call List view
if (_reqAction != null &&_reqAction.equals(_phoneCallAction) == true) {
//DO something to return to look and feel
}
...
myListView.setOnItemClickListener(new OnItemClickListener() { //Act on item when selected
#Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
myListView.moveToPosition(position);
String _bPartyNumber = "tel:"+myListView.getString(myListView.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
//Provide an initial state for the listener to access.
initialiseCallStatePreferences(_bPartyNumber);
//Setup the listener so we can restart myActivity
EndCallListener _callListener = new EndCallListener();
TelephonyManager _TM = (TelephonyManager)mApp.getSystemService(Context.TELEPHONY_SERVICE);
_TM.listen(_callListener, PhoneStateListener.LISTEN_CALL_STATE);
Intent _makeCall = new Intent(Intent.ACTION_CALL, Uri.parse(_bPartyNumber));
_makeCall.setComponent(new ComponentName("com.android.phone","com.android.phone.OutgoingCallBroadcaster"));
startActivity(_makeCall);
finish();
//Wait for call to enter the IDLE state and then we will be recalled by _callListener
}
});
}//end of onCreate()
use this to initilaise the behaviour for your onClick in myActivity e.g. after onCreate()
private void initialiseCallStatePreferences(String _BParty) {
final int LAUNCHED = -1;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(
mApp.getBaseContext());
SharedPreferences.Editor _ed = prefs.edit();
String _prefKey = mApp.getString(R.string.last_phone_call_state_key),
_bPartyKey = mApp.getString(R.string.last_phone_call_bparty_key);
//Save default call state before next call
_ed.putInt(_prefKey,LAUNCHED);
_ed.putString(_bPartyKey,_BParty);
_ed.commit();
}
You should find that clicking your list of phone numbers finishes your activty, makes the call to the number and returns to your activty when the call ends.
Making a call from outside your app while it's still around won't restart your activty (unless it's the same as the last BParty number called).
:)
you can use startActivityForResult()
This is solution from my point of view:
ok.setOnClickListener(this);
#Override
public void onClick(View view) {
if(view == ok){
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:" + num));
activity.startActivity(intent);
}
Of course in Activity (class) definition you have to implement View.OnClickListener .
Here is my example, first the user gets to write in the number he/she wants to dial and then presses a call button and gets directed to the phone. After call cancelation the user gets sent back to the application. In order to this the button needs to have a onClick method ('makePhoneCall' in this example) in the xml. You also need to register the permission in the manifest.
Manifest
<uses-permission android:name="android.permission.CALL_PHONE"></uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
Activity
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class PhoneCall extends Activity {
EditText phoneTo;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_phone_call);
phoneTo = (EditText) findViewById(R.id.phoneNumber);
}
public void makePhoneCall(View view) {
try {
String number = phoneTo.getText().toString();
Intent phoneIntent = new Intent(Intent.ACTION_CALL);
phoneIntent.setData(Uri.parse("tel:"+ number));
startActivity(phoneIntent);
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(PhoneCall.this,
"Call failed, please try again later!", Toast.LENGTH_SHORT).show();
}
}
}
XML
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="phone"
android:ems="10"
android:id="#+id/phoneNumber"
android:layout_marginTop="67dp"
android:layout_below="#+id/textView"
android:layout_centerHorizontal="true" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Call"
android:id="#+id/makePhoneCall"
android:onClick="makePhoneCall"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
#Override
public void onClick(View view) {
Intent phoneIntent = new Intent(Intent.ACTION_CALL);
phoneIntent.setData(Uri.parse("tel:91-000-000-0000"));
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
return;
}
startActivity(phoneIntent);
}
If you are going to use a listener you will need to add this permission to the manifest as well.
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
Inside PhoneStateListener after seeing the call is finished better use:
Intent intent = new Intent(CallDispatcherActivity.this, CallDispatcherActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
Where CallDispatcherActivity is the activity where the user has launched a call (to a taxi service dispatcher, in my case). This just removes Android telephony app from the top, the user gets back instead of ugly code I saw here.
To return to your Activity, you will need to listen to TelephonyStates. On that listener you can send an Intent to re-open your Activity once the phone is idle.
At least thats how I will do it.
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:"+number));
startActivity(callIntent);
**Add permission :**
<uses-permission android:name="android.permission.CALL_PHONE" />
Try using:
finish();
at the end of activity. It will redirect you to your previous activity.
When PhoneStateListener is used, one need to make sure PHONE_STATE_IDLE following a PHONE_STATE_OFFHOOK is used to trigger the action to be done after the call. If the trigger happens upon seeing PHONE_STATE_IDLE, you will end up doing it before the call. Because you will see the state change PHONE_STATE_IDLE -> PHONE_STATE_OFFHOOK -> PHONE_STATE_IDLE.
// in setonclicklistener put this code:
EditText et_number=(EditText)findViewById(R.id.id_of_edittext);
String my_number = et_number.getText().toString().trim();
Intent callIntent = new Intent(Intent.ACTION_CALL, Uri.parse(my_number));
startActivity(callIntent);
// give permission for call in manifest:
<uses-permission android:name="android.permission.CALL_PHONE"></uses-permission>
#Dmitri Novikov, FLAG_ACTIVITY_CLEAR_TOP clears any active instance on top of the new one. So, it may end the old instance before it completes the process.
Add this is your xml: android:autoLink="phone"
Steps:
1)Add the required permissions in the Manifest.xml file.
<!--For using the phone calls -->
<uses-permission android:name="android.permission.CALL_PHONE" />
<!--For reading phone call state-->
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
2)Create a listener for the phone state changes.
public class EndCallListener extends PhoneStateListener {
#Override
public void onCallStateChanged(int state, String incomingNumber) {
if(TelephonyManager.CALL_STATE_RINGING == state) {
}
if(TelephonyManager.CALL_STATE_OFFHOOK == state) {
//wait for phone to go offhook (probably set a boolean flag) so you know your app initiated the call.
}
if(TelephonyManager.CALL_STATE_IDLE == state) {
//when this state occurs, and your flag is set, restart your app
Intent i = context.getPackageManager().getLaunchIntentForPackage(
context.getPackageName());
//For resuming the application from the previous state
i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
//Uncomment the following if you want to restart the application instead of bring to front.
//i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(i);
}
}
}
3)Initialize the listener in your OnCreate
EndCallListener callListener = new EndCallListener();
TelephonyManager mTM = (TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
mTM.listen(callListener, PhoneStateListener.LISTEN_CALL_STATE);
but if you want to resume your application last state or to bring it back from the back stack, then replace FLAG_ACTIVITY_CLEAR_TOP with FLAG_ACTIVITY_SINGLE_TOP
Reference this Answer
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent .setData(Uri.parse("tel:+91-XXXXXXXXX"));
startActivity(callIntent );
When starting your call, it looks fine.
There is a difference between android 11+ and down in bringing your app to the front though.
Android 10 or less you need to start a new intent, android 11+ you simply use BringTaskToFront
In the call state IDLE:
if (Build.VERSION.SDK_INT >= 11) {
ActivityManager am = (ActivityManager) activity.getSystemService(Activity.ACTIVITY_SERVICE);
am.moveTaskToFront(MyActivity.MyActivityTaskId, ActivityManager.MOVE_TASK_WITH_HOME);
} else {
Intent intent = new Intent(activity, MyActivity.class);
activity.startActivity(intent);
}
I set the MyActivity.MyActivityTaskId when making the call on my activity like so, it this doesnt work, set this variable on the parent activity page of the page you want to get back to.
MyActivity.MyActivityTaskId = this.getTaskId();
MyActivityTaskId is a static variable on my activity class
public static int MyActivityTaskId = 0;
I hope this will work for you. I use the above code a bit differently, I open my app as soon as the call is answered sothat the user can see the details of the caller.
I have set some stuff in the AndroidManifest.xml as well:
/*Dont really know if this makes a difference*/
<activity android:name="MyActivity" android:taskAffinity="" android:launchMode="singleTask" />
and permissions:
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.REORDER_TASKS" />
Please ask questions if or when you get stuck.
To call from app use simple intent for call, after that if you want to listen the call status then use below code
1] implement this in your class -
implements AudioManager.OnAudioFocusChangeListener
2] Add below code with overridden method
AudioManager audioManager = (AudioManager) getSystemService(AUDIO_SERVICE); //public static final String AUDIO_SERVICE = "audio";
audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
assert audioManager != null;
audioManager.requestAudioFocus(this, AudioManager.STREAM_MUSIC,
AudioManager.AUDIOFOCUS_GAIN);
#Override
public void onAudioFocusChange(int focusChange) {
switch (focusChange) {
case AudioManager.AUDIOFOCUS_LOSS: {
//here you can pause your playing audio
break;
}
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT: {
//here you can pause your playing audio
break;
}
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK: {
break;
}
case AudioManager.AUDIOFOCUS_GAIN: {
//here you will return back to the activity when your call is finsihed
//resume your audio here
break;
}
}
}
3]Add this
#Override
public void onDestroy() {
audioManager.abandonAudioFocus(this);
}
Related
I’m doing this application that should read some nfc tags.
It is a kind of treasure hunt and who scans all the tags wins.
I structured the application so that there is an initial login and a set of data is saved in a database so that you can keep track of the players who scanned the tags.
I followed a tutorial to create an activity that can read tags. (Only one line of text should be read from the tags)
This is the code I put in the manifest
<uses-permission android:name="android.permission.NFC"/>
<intent-filter>
<action android:name="android.nfc.action.NDEF_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain"/>
</intent-filter>
This is the activity code
public class scanActivity extends AppCompatActivity {
private TextView scanView;
private PendingIntent pendingIntent;
private IntentFilter[] readfilters;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scan);
scanView=findViewById(R.id.scanView);
try {
Intent intent= new Intent(this,getClass());
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
pendingIntent=PendingIntent.getActivity(this,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
IntentFilter intentFilter = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);
IntentFilter textFilter = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED,"text/plain");
readfilters = new IntentFilter[] {intentFilter, textFilter};
} catch (IntentFilter.MalformedMimeTypeException e) {
e.printStackTrace();
}
readTag(getIntent());
}
private void enableRead(){
NfcAdapter.getDefaultAdapter(this).enableForegroundDispatch(this,pendingIntent,readfilters,null);
}
private void disableRead(){
NfcAdapter.getDefaultAdapter(this).disableForegroundDispatch(this);
}
#Override
protected void onResume() {
super.onResume();
enableRead();
}
#Override
protected void onPause() {
super.onPause();
disableRead();
}
#Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
readTag(getIntent());
}
private void readTag(Intent intent) {
Parcelable[] messages = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
scanView.setText("");
if(messages != null){
for (Parcelable message:messages){
NdefMessage ndefMessage = (NdefMessage) message;
for (NdefRecord record : ndefMessage.getRecords()){
switch (record.getTnf()){
case NdefRecord.TNF_WELL_KNOWN:
scanView.append("WELL KNOWN ");
if (Arrays.equals(record.getType(),NdefRecord.RTD_TEXT)){
scanView.append("TEXT: ");
scanView.append(new String(record.getPayload()));
scanView.append("\n");
}
}
}
}
}
}
}
Currently when I approach a tag, the phone tries to open a task, but it ends up reopening the application and it does not even open the task with the textview on which the content of the tag should be written.
I would need to make sure that the application does not reopen again when I approach a tag, but simply switch to the next activity, keeping the previous ones.
Also, I would like to prevent the app from opening itself when approaching a tag.
If the above requests are impossible. I need at least to be able to create an activity that reads the tags without opening other activities.
I thank in advance for those who tried to help me <3.
To prevent the App from being automatically opened automatically when approaching the Tag then remove the intent-filter entries in your manifest
If you don't want the Activity paused and resumed when a Tag is detected then don't use the older NFC API of enableForegroundDispatch use the newer and better API of enabledReaderMode as this will deliver the Tag data to a new Thread in your current activity without pausing and resuming your current activity.
Java example of enableReaderMode
I am working on notification and I have a problem. I have an activity already open when I click on notification I don't want to open it again just update the current activity.
if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) {
Intent pushNotification = null;
if (NotificationType != 0 && NotificationType != 2 && NotificationType != 5 && NotificationType != 26) {
pushNotification = new Intent(getApplication(), SplashScreen.class);
pushNotification.putExtra("NotificationType", NotificationType);
pushNotification.putExtra("ReferenceID", ReferenceID);
pushNotification.putExtra("NotificationID", ReferenceID);
pushNotification.putExtra("isread", ReferenceID);
showNotificationMessage(getApplicationContext(), title, message, time, pushNotification);
} else if (NotificationType == 0 || NotificationType == 2 || NotificationType == 5 || NotificationType == 26) {
showNotificationMessageWithNoAction(getApplicationContext(), title, message, title, null);
}
}
can Anyone tell me how I update the activity when I click on notification?
You just need to declare the launchMode to the singleTask to make ensure that multiple same screens not will open.
There are four launch modes for activity. They are:
1. Standard
2. SingleTop
3. SingleTask
4. SingleInstance
Please refer this link Click here
<activity android:name="YOUR_SPLASH_ACTIVITY"
android:launchMode="singleTask"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
And in the Java code , you just override the onNewIntent method , to refresh activity,
#Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
/**
* HERE YOU JUST REFRESH , YOUR ACTIVITY
*/
}
I don't know if this is what you need but you can do this
finish();
startActivity(getIntent());
Let me know what you really need.
EDIT:
If you need to keep your activity state intact, you can do this
#Override
public void onSaveInstanceState(Bundle savedInstanceState) {
super.onSaveInstanceState(savedInstanceState);
savedInstanceState.putString("MyString", "Welcome back to Android");
}
This will save your activity state
And then you retrieve UI state like this
#Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
String myString = savedInstanceState.getString("MyString");
}
Best way is to make use of the onNewIntent(Intent) method of your Activity.
You can use the Intent parameter of this method to get your Intent Extras, because getIntent() will give the Intent that started the Activity in the first place.
public class MainActivity extends Activity {
public void onCreate(Bundle SavedInstanceState) {
//Initial loading
}
#Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
if(intent.getStringExtra("methodName").equals("myMethod")) {
//Update the existing screen
}
}
}
I'm developing lock screen app. Here Lock screen is displayed on the top of the screen using this command "WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;"
But my problem is I can't See the Incoming call Window when the custom lock screen is displayed. Incoming call window is not overrided over my custom lock screen.
1) Is there any permission required for displaying the incoming call window.?
2) We have to add any other codes for answering the incoming class
This is my Lockscreen receiver class
public class LockScreenReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(action.equals(Intent.ACTION_SCREEN_OFF) || action.equals(Intent.ACTION_BOOT_COMPLETED))
{
Intent i = new Intent(context, MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
In the normal lock screen apps -> They can attend the incoming calls and after attending that call, lock screen is displayed. How ????
Please help me. Thanks in advance
Add receiver in the manifest and ask for permission
<receiver android:name=".IncomingCall">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
</receiver>
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
Create class IncomingCall
public class IncomingCall extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
try {
TelephonyManager telephonyManager = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
MyPhoneStateListener PhoneListener = new MyPhoneStateListener();
// Register listener for LISTEN_CALL_STATE
telephonyManager.listen(PhoneListener, PhoneStateListener.LISTEN_CALL_STATE);
} catch (Exception e) {
e.printStackTrace();
}
Implement PhoneStateListener in LockScreen and call onCallStateChanged
private class LockScreen extends AppCompatActivity implements PhoneStateListener{
public void onCallStateChanged(int state, String incomingNumber) {
//Disable lockscreen when calls come
}
has anyone know how to restarting a service in android?? i have a service that called when device is booting.. and i have an option.java for saving my configuration..
if i editing a configuration in option.java, then i must restarting my service to takes the effect..
i only know how to start a service and after it running, i don't know how to restart it after a new configuration was made.. any idea??
startService(new Intent(this, ListenSMSservice.class));
Just stop the service and start it again
stopService(new Intent(this, ListenSMSservice.class));
startService(new Intent(this, ListenSMSservice.class));
In your element:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
2) In your element (be sure to use a fully-qualified [or relative] class name for your BroadcastReceiver):
<receiver android:name="com.example.MyBroadcastReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
public class MyBroadcastreceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Intent startServiceIntent = new Intent(context, MyService.class);
context.startService(startServiceIntent);
}
}
for more elaboration : this
So by observer-observable design pattern, I meant making use of FileObserver class provided by Android.
For example, here is a snippet from WallPaperManagerService.java from android's source code:
So, in your case, you would create a file observer (see sample code below) on the config file, and each time this config file changes, you will read all the values from your (already running) service.
Hope you got the essence of the idea.
/**
* Observes the wallpaper for changes and notifies all IWallpaperServiceCallbacks
* that the wallpaper has changed. The CREATE is triggered when there is no
* wallpaper set and is created for the first time. The CLOSE_WRITE is triggered
* everytime the wallpaper is changed.
*/
private final FileObserver mWallpaperObserver = new FileObserver(
WALLPAPER_DIR.getAbsolutePath(), CREATE | CLOSE_WRITE | DELETE | DELETE_SELF) {
#Override
public void onEvent(int event, String path) {
if (path == null) {
return;
}
synchronized (mLock) {
// changing the wallpaper means we'll need to back up the new one
long origId = Binder.clearCallingIdentity();
BackupManager bm = new BackupManager(mContext);
bm.dataChanged();
Binder.restoreCallingIdentity(origId);
File changedFile = new File(WALLPAPER_DIR, path);
if (WALLPAPER_FILE.equals(changedFile)) {
notifyCallbacksLocked();
}
}
}
};
I have a headset with single button and want to do a simple Toast when the button is pressed.
Right now I have the following code:
public class MediaButtonIntentReceiver extends BroadcastReceiver {
public MediaButtonIntentReceiver() {
super();
}
#Override
public void onReceive(Context context, Intent intent) {
String intentAction = intent.getAction();
if (!Intent.ACTION_MEDIA_BUTTON.equals(intentAction)) {
return;
}
KeyEvent event = (KeyEvent)intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
if (event == null) {
return;
}
int action = event.getAction();
if (action == KeyEvent.ACTION_DOWN) {
// do something
Toast.makeText(context, "BUTTON PRESSED!", Toast.LENGTH_SHORT).show();
}
abortBroadcast();
}
}
And my main activity is the following:
public class mainActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_BUTTON);
MediaButtonIntentReceiver r = new MediaButtonIntentReceiver();
registerReceiver(r, filter);
}
}
Nothing happens though when I push the button though.
I'm pretty sure something is wrong with my permissions/xml in the manifest. Here's the receiver XML so far:
<receiver android:name=".MediaButtonIntentReceiver">
<intent-filter>
<action android:name="android.intent.action.MEDIA_BUTTON" />
</intent-filter>
</receiver>
....
and:
<uses-permission android:name="android.permission.BLUETOOTH" />
I notice in LogCat that when I press the button I get an error from "BluetoothIntentReceiver" saying "onReceive() Action : android.intent.action.MEDIA_BUTTON"
Just wanted to answer my own question in case others come across similar issues.
The code does work, just I wasn't seeing the Toast because I had another headset button controller app installed (and running in the background), so I guess it took priority over mine. However when I put
IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_BUTTON);//"android.intent.action.MEDIA_BUTTON"
MediaButtonIntentReceiver r = new MediaButtonIntentReceiver();
filter.setPriority(1000); //this line sets receiver priority
registerReceiver(r, filter);
It was able to work even with the other app installed. Also, you don't need both the above AND the XML, one or the other is fine as ways of registering the intent receiver.
Here's what I've got that's working in Android 4.2.2
In my manifest.xml I do this:
<receiver android:name=".MediaButtonIntentReceiver">
<intent-filter>
<action android:name="android.intent.action.MEDIA_BUTTON" />
</intent-filter>
NB: this is instead of calling registerReceiver.
In my Main Activity's onCreate I need to call the AudioManager:
((AudioManager)getSystemService(AUDIO_SERVICE)).registerMediaButtonEventReceiver(
new ComponentName(
getPackageName(),
MediaButtonIntentReceiever.class.getName()));
I have found it will work without the AudioManager call, but not for long!
You shouldn't use setPriority
You register your broadcast receiver in the manifest
You then register your broadcast receiver using:
AudioManager#registerMediaButtonEventReceiver
The argument to registerMediaButtonEventReceiver is a ComponentName that points your broadcast receiver.
For a fully documented answer for Android >4.0 have a look here:
BroadcastReceiver for ACTION_MEDIA_BUTTON not working
If you don't want to use BroadcastReceiver, you can do this for Android >5.0 (API level 21 LOLLIPOP) using the MediaSession described here: https://stackoverflow.com/a/39413753/1386969