Question

我想听一个来电。

我知道您必须在AndroidManifest中提供权限并使用

设置接收器

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

和

<receiver ... 
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />...

但是，在我的项目中，我有按代码设置接收器，

IntentFilter filter = new IntentFilter();
filter.addAction( ... );
registerReceiver(broadcastReceiver, filter);

我addAction内TelephonyManager.ACTION_PHONE_STATE_CHANGED private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { ...
我用

创建BroadcastReceiver

String action = intent.getAction();

然后，在其中，我从filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);的意图中采取行动，并检查它是什么动作。

它非常适合蓝牙

switch (action) {
    case BluetoothAdapter.ACTION_DISCOVERY_STARTED: ...

和

TelephonyManager.ACTION_PHONE_STATE_CHANGED

但它不会检查addAction()。

所以，我的问题是：
如何设置动作（TelephonyManager.ACTION_PHONE_STATE_CHANGED）来听取状态变化？
BluetoothDevice.ACTION_FOUND BluetoothAdapter.ACTION_DISCOVERY_STARTED BluetoothAdapter.ACTION_DISCOVERY_FINISHED不对吗？
如果我放弃并在AndroiManifest中设置接收器，我该如何设置蓝牙滤波器？我正在使用

/*Desktop Query*/
@media only screen and (min-width: 768px) {
  body {
    background: black;
  }
}

/*Mobile Query*/
@media only screen and (max-width: 480px) {
  body {
    background-color: tomato;
  }
}

/*Tablet Query*/
@media only screen and (min-width: 481px) and (max-width:768px) {
  body {
    background: pink;
  }
}

Answer 1

在您的活动中首先注册接收者

this.registerReceiver(this.broadcastReceiver, new IntentFilter(TelephonyManager.ACTION_PHONE_STATE_CHANGED));

这是broadcastReceiver：

private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {

    @Override
    public void onReceive(Context context, Intent intent) {
        String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);

        if (state == null) {

            //Outgoing call
            String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
            Log.e("tag", "Outgoing number : " + number);

        } else if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)) {

            Log.e("tag", "EXTRA_STATE_OFFHOOK");

        } else if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)) {

            Log.e("tag", "EXTRA_STATE_IDLE");

        } else if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {

            //Incoming call
            String number = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
            Log.e("tag", "Incoming number : " + number);

        } else
            Log.e("tag", "none");
    }
};

Answer 2

使用onCreate()方法创建此对象：

tMg =(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);

listener = new PhoneStateListener{

    onCallStateChanged(int state, String incomingNumber){
         switch(state){
               case EXTRA_STATE_RINGING:
                   // phone is ringing
               break;
               case EXTRA_STATE_OFFHOOK:
                  // phone is offhook
               break;
               case EXTRA_STATE_IDLE:
                 // phone is idle
               break;
         }
    }

}

在onStart()注册你的听众：

tMg.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);

在onStop()取消注册您的听众：

tMg.listen(listener,  PhoneStateListener.LISTEN_NONE);

addAction到IntentFilter来处理电话状态更改

2 个答案: