Develop Reference

Set Custom call activity

I would like to set my own activity infront the call screen. I have seen that there are many examples for this but with the older versions of android, while I want it to work with android 6.0 and above. This means that I have to deal with the permissions. I managed to grant the necessary permissions. After that I make a Class that inherits BroadcastReceiver so that I can detect when the phone is ringing, the only problem is that I can't send my activity infront of the call display. These are some of the classes I use:
public class PhoneStateReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
try {
System.out.println("Receiver start");
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
Toast.makeText(context, " Receiver start ", Toast.LENGTH_SHORT).show();
if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
Toast.makeText(context, "Ringing State Number is -", Toast.LENGTH_SHORT).show();
Intent dialogIntent = new Intent(context, LockActivity.class);
dialogIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
context.startActivity(dialogIntent);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
public class LockActivity extends AppCompatActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_lock_screen);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+ WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
+WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
+WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
Button btnLock = (Button) findViewById(R.id.btnUnlock);
final EditText txtPass = (EditText) findViewById(R.id.txtPass);
btnLock.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String pass = txtPass.getText().toString();
if(pass.equals("pass")||pass.equals("пасс")) {
finish();
}else{
Toast.makeText(LockActivity.this, "Wrong password!", Toast.LENGTH_SHORT).show();
}
}
});
}
}
If anything else is needed please ask!

I managed to solve it, the problem is that it takes time to start the in-built call activity, so my activity started first and the other went on top of it. Therefore I made the current thread of my activity to sleep for less than a second. The in-built activity was launched and then my activity went on top of it.
public class PhoneStateReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
try {
System.out.println("Receiver start");
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
Toast.makeText(context, " Receiver start ", Toast.LENGTH_SHORT).show();
if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
Toast.makeText(context, "Ringing State Number is -", Toast.LENGTH_SHORT).show();
Intent dialogIntent = new Intent(context, LockActivity.class);
dialogIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
Thread.sleep(700);
context.startActivity(dialogIntent);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

Send a missed call-Android program

I want to write a android application which can send sb a missed call. It means that application call to sb by about 5 second.
I know that this code start calling.
private void call() {
try {
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:123456789"));
startActivity(callIntent);
} catch (ActivityNotFoundException e) {
Log.e("helloandroid dialing example", "Call failed", e);
}
}
But I dont know how to stop it(after 5 second)?
Ps.This question have got mark -1 because question is stupid or my english is bad?

There is no direct way to do this because once you start the callIntent, the control will go to the calling application.
But there are workarounds to do this by getting the ITelephony object of TelephonyManagerusing java reflection.
TelephonyManager tm = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
try {
Class c = Class.forName(tm.getClass().getName());
Method m = c.getDeclaredMethod("getITelephony");
m.setAccessible(true);
com.android.internal.telephony.ITelephony telephonyService = (ITelephony) m.invoke(tm);
}catch(Exception e){}
telephonyService.endCall();
source:
call-control-in-android

The simplest way is to use a delay Handler and make a new call to self after you have made the call to your target number. Hoping this is not for spam purposes which is frowned upon. In your code snipplet or loop you can have the below
if (checkPermission(Manifest.permission.CALL_PHONE)) {//targetMSISDN the phone no you are calling out to
String dial = "tel:" + targetMSISDN;
startActivity(new Intent(Intent.ACTION_CALL, Uri.parse(dial)));
//startActivity(new Intent(Intent.ACTION_CALL, Uri.parse(dial)));
//delay a drop call
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
//Do something after 10000ms
Toast.makeText(YourNotSpamActivity.this, "Calling me to end you!", Toast.LENGTH_SHORT).show();
//end call now
String TAG="ERR:";
try {
Log.v(TAG, "Get getTeleService...");
if (checkPermission(Manifest.permission.CALL_PHONE)) {
String dial = "tel:YourPhoneNumber";
startActivity(new Intent(Intent.ACTION_CALL, Uri.parse(dial)));//call yourself to terminate the first call
}
} catch (Exception e) {
e.printStackTrace();
Log.e(TAG,
"FATAL ERROR: couldn't call ");
Log.e(TAG, "Exception object: " + e);
}
}
}, 10000);
//end the end call
} else {
Toast.makeText(YourNotSpamActivity.this, "Permission Call Phone denied", Toast.LENGTH_SHORT).show();
}

Killing Android app 2 from app 1

I have 3 android apps. If a user has app1 open, is should check to see if app2, and/or app3 are running, and if so, kill them.
Here is what I have tried.
Implemented a BroadcastReceiver() in each app.
mFinishReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
Log.v("intent", "Got Kill Intent, I am " + pn);
if (killAction.equals(intent.getAction())) {
killmePlease(pn, killAction);
}
}
};
registerReceiver(mFinishReceiver, intentFilter);
and then, using this I try to kill the app..
private void killmePlease(String pn) {
Intent _killme = new Intent(this, MainActivity.class);
startActivity(_killme);
try {
Log.v("intent", "Finishing " + pn);
setResult(RESULT_OK);
MainActivity.this.finish();
System.exit(0);
Log.v("intent", "Finished");
return;
} catch (Exception ex) {
Log.v("intent", "Error Killing " + ex.getMessage());
}
}
However, the apps are still running with no errors thrown. Can anyone kindly tell me what I am missing?

How to block Specific outgoing calls

I want to block a specific phone number that is in my database
I do a comparison between the number the user dialed, and the number in memory. If they are equal, I block the call.
My code:
public void onReceive(Context context, Intent intent) {
PlaceDataSQL placeDataSQL =new PlaceDataSQL(context);
ArrayList<String> getUsersPhoneNumbers= placeDataSQL.getUsersPhoneNumbers();
//TODO
//===========
//here I need to check the number
Bundle b = intent.getExtras();
String incommingNumber = b.getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
//String outGoingNumber = b.getString(TelephonyManager.);
Boolean find=false;
try {
for(int i=0;i<getUsersPhoneNumbers.size();i++)
{
if(incommingNumber.equals(getUsersPhoneNumbers.get(i)))
{
find=true;
break;
}
}
} catch (Exception e) {
incommingNumber="";
}
// ========================================
//here the problem
//=========================================
String phonenumber=b.getString(Intent.EXTRA_PHONE_NUMBER);
try {
for(int i=0;i<getUsersPhoneNumbers.size();i++)
{
if(phonenumber.equals(getUsersPhoneNumbers.get(i)))
{
find=true;
break;
}
}
if (!find)
return;
}catch (Exception e) {
phonenumber="";
}
if (!find)
return;
/* examine the state of the phone that caused this receiver to fire off */
String phone_state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
if (phone_state.equals(TelephonyManager.EXTRA_STATE_RINGING))
{
logMe("Phone Ringing: the phone is ringing, scheduling creation call answer screen activity");
Intent i = new Intent(context, CallAnswerIntentService.class);
i.putExtra("delay", 100L);
i.putExtra("number", incommingNumber);
context.startService(i);
logMe("Phone Ringing: started, time to go back to listening");
}
if (phone_state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK))
{
Intent i = new Intent(context,InCallScreenGuardService.class);
i.putExtra("delay", 100L);
i.putExtra("number", phonenumber);
logMe("Phone Offhook: starting screen guard service");
context.startService(i);
}
if (phone_state.equals(TelephonyManager.EXTRA_STATE_IDLE))
{
Intent i = new Intent(context,InCallScreenGuardService.class);
logMe("Phone Idle: stopping screen guard service");
context.stopService(i);
}
return;
}
The problem:
I can get incoming numbers but I can't get outgoing numbers?

You will need a BroadcastReciever for this.
public class OutgoingCallReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Bundle bundle = intent.getExtras();
if(null == bundle)
return;
String phonenumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
Log.i("OutgoingCallReceiver",phonenumber);
Log.i("OutgoingCallReceiver",bundle.toString());
String info = "Detect Calls sample application\nOutgoing number: " + phonenumber;
Toast.makeText(context, info, Toast.LENGTH_LONG).show();
}
}

Can't start an activity in application onCreate

I am trying to start an activity after n seconds with a handler. The application was crashing on the startActivity call, so I put the handler code in my application's onCreate, and it is still crashing (which makes me think that the error comes from me not using startActivity well) :
#Override
public void onCreate(){
String roomName = this.getSettingValue(R.string.PREFERENCES_ROOM_NAME, "");
Room room;
try {
room = this.getRoomWithName(roomName);
} catch (ReservatorException ex) {
Toast err = Toast.makeText(this, ex.getMessage(),
Toast.LENGTH_LONG);
err.show();
return;
}
Intent i = new Intent(this, RoomActivity.class);
i.putExtra("room", room);
this.startActivity(i);
}
Strange thing is that this work when called from a view, by using exactly the same code, but different context :
Intent i = new Intent(getContext(), RoomActivity.class);
// ...
I am pretty new to Android ... so there may be information missing in that question, or I might even be trying to do something completely stupid who knows ?
EDIT
Link to the stacktrace : http://pastebin.com/vh2QC3xz
EDIT2
Here is the handler version of my code (so what I am trying to do in the end) :
public class ReservatorApplication extends Application {
private GoToFavouriteRoom goToFavouriteRoomRunable;
class GoToFavouriteRoom implements Runnable {
ReservatorApplication app;
public GoToFavouriteRoom(ReservatorApplication anApp){
app = anApp;
}
#Override
public void run() {
String roomName = app.getSettingValue(R.string.PREFERENCES_ROOM_NAME, "");
Room room;
try {
room = app.getDataProxy().getRoomWithName(roomName);
} catch (ReservatorException ex) {
Toast err = Toast.makeText(app, ex.getMessage(),
Toast.LENGTH_LONG);
err.show();
return;
}
RoomActivity.startWith(app, room);
}
}
private final ReservatorAppHandler handler = new ReservatorAppHandler();
class ReservatorAppHandler extends Handler{
#Override
public void handleMessage(Message msg){
return;
}
}
#Override
public void onCreate(){
String serverAddress = getSettingValue(R.string.PREFERENCES_SERVER_ADDRESS, "mail.futurice.com");// TODO: change to mail.futurice.com before delivery
proxy = new SoapDataProxy(serverAddress);
// proxy = new DummyDataProxy();
proxy = new CachedDataProxy(proxy);
addressBook = new FumAddressBook();
try {
addressBook.prefetchEntries();
} catch (ReservatorException e) {
// TODO: DIE!
}
goToFavouriteRoomRunable = new GoToFavouriteRoom(this);
handler.postDelayed(goToFavouriteRoomRunable, 20000);
}

Ok ... I finally solved my problem, mainly thanks to #Drax
Apparently, you just can't start an activity from an application ... you need an instance of an activity. So :
public class ReservatorApplication extends Application {
#Override
public void onCreate(){
Intent i = new Intent(this, RoomActivity.class);
this.startActivity(i);
}
}
Is just not valid, and causes a RunTimeException ...

As far as crashing is concern when you start activity in handler with "this". it will take handler's context. and when you do getContext() it will take activity context.

Intent i = new Intent(YourActivityName.this, RoomActivity.class);
or
Intent i = new Intent(getBaseContext(), RoomActivity.class);

It`s hard to answer without seeing the stack trace from logcat, but I found that sometimes you need to pass the application context to the a new Intent before starting an Activity.
Try this line:
Intent i = new Intent(getApplicationContext(), RoomActivity.class);