TelephonyManager getstate（）在android中返回零

Question

在我的应用程序中，我想为有人接听电话时的状态记录日志。 switch语句上的getState（）必须返回正确的调用状态，但始终返回零。 这是我的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");
        }
    }

清单文件：

     <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>

权限：

<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（）方法位于一个单独的类中，该类名为BroadCast，我通过创建它的新实例进行调用。

如果需要更多详细信息，请告诉我。

Answer 1

尝试使用BroadcastReceiver处理来电。 在您的onResume中，设置接收器

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

并处理如

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
        }
    }
};