[英]about broadcast receiver
大家好,我想創建一個應用程序,其中有一個活動,說我的活動。 現在,如果要在20秒內仍未接聽來電,我想從來電開始。請幫助我。
您首先需要注冊您的接收器,例如。
<receiver android:name=".CustomBroadcastReceiver">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
您在這里注冊以收聽電話狀態更改。
接下來,您將需要擴展phonestateListener以獲得您的規范。
public class CustomPhoneStateListener extends PhoneStateListener {
private static final String TAG = "CustomPhoneStateListener";
public void onCallStateChange(int state, String incomingNumber){
//Here you recieve the phone state being changed and are able to get the number and state.
switch(state){
case TelephonyManager.CALL_STATE_RINGING:
Log.d(TAG, "RINGING");
//Here you could count with for() for 20 seconds and then create a method to do what you want.
break;
在這里創建您的BroadCastReceiver ...
public class CustomBroadcastReceiver extends BroadcastReceiver {
private static final String TAG = "CustomBroadcastReceiver";
@Override
public void onReceive(Context context, Intent intent) {
Log.v(TAG, "inside");
TelephonyManager telephony = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
CustomPhoneStateListener customPhoneListener = new CustomPhoneStateListener();
telephony.listen(customPhoneListener, PhoneStateListener.LISTEN_CALL_STATE);
Bundle bundle = intent.getExtras();
String phoneNr= bundle.getString("incoming_number");
Log.v(TAG, "phoneNr: "+phoneNr);
}
編輯:
為了計數,您可以創建一個方法,例如
public void increment() {
if (count < maxCount) count++;
}
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