TelephonyManager getstate（）在android中返回零

Question

在我的應用程序中，我想為有人接聽電話時的狀態記錄日志。 switch語句上的getState（）必須返回正確的調用狀態，但始終返回零。 這是我的onRecieve（）方法：

  public void onReceive(Context context, Intent intent) {
    if(intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL)){
        incomingFlag = false;
        String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
        Log.i(TAG, "call OUT:"+phoneNumber);
        TelephonyManager tm =
                (TelephonyManager)context.getSystemService(Service.TELEPHONY_SERVICE);
        Log.e("log state", String.valueOf(tm.getCallState()));
        switch (tm.getCallState()) {
            case TelephonyManager.CALL_STATE_RINGING:
                incomingFlag = true;
                incoming_number = intent.getStringExtra("incoming_number");
                Log.i(TAG, "RINGING :"+ incoming_number);
                break;
            case TelephonyManager.CALL_STATE_OFFHOOK:
                if(incomingFlag){
                    Log.i(TAG, "incoming ACCEPT :"+ incoming_number);
                }
                break;
            case TelephonyManager.CALL_STATE_IDLE:
                if(incomingFlag){
                    Log.i(TAG, "incoming IDLE");
                }
                break;
                default:
                    Log.e("ds","Error");
        }
    }

清單文件：

     <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <receiver android:name=".BroadCast" >
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" />
        </intent-filter>
        <intent-filter>
            <action android:name="android.intent.action.NEW_OUTGOING_CALL"/>
        </intent-filter>
    </receiver>

權限：

<uses-permission android:name="android.permission.CALL_PHONE"/>
<uses-permission android:name = "android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>

上面提到的onCreate（）方法位於一個單獨的類中，該類名為BroadCast，我通過創建它的新實例進行調用。

如果需要更多詳細信息，請告訴我。

Answer 1

嘗試使用BroadcastReceiver處理來電。 在您的onResume中，設置接收器

IntentFilter filter2 = new IntentFilter(TelephonyManager.ACTION_PHONE_STATE_CHANGED);
filter2.setPriority(99999);
this.registerReceiver(incomingCallReceiver, filter2);

並處理如

BroadcastReceiver incomingCallReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        final Bundle bundle = intent.getExtras();
        if (bundle == null) return;
        // Incoming call

        // Get the state
        String state = bundle.getString(TelephonyManager.EXTRA_STATE);

        // Process the states
        if ((state != null) &&  (state.equalsIgnoreCase(TelephonyManager.EXTRA_STATE_RINGING))) {
            // Ringing State
        }
        if ((state != null) &&  (state.equalsIgnoreCase(TelephonyManager.EXTRA_STATE_IDLE))) {
            // Idle State
        }
        if ((state != null) &&  (state.equalsIgnoreCase(TelephonyManager.EXTRA_STATE_OFFHOOK))) {
            // Offhook State
        }
    }
};