我想听一个来电。
我知道您必须在AndroidManifest内部授予权限，并设置接收方为
<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，我通过代码设置了接收方，
IntentFilter filter = new IntentFilter();
filter.addAction( ... );
registerReceiver(broadcastReceiver, filter);
我在
addAction放在哪里我用创建了BroadcastReceiver
private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) { ...
然后，在其中，我使用
TelephonyManager.ACTION_PHONE_STATE_CHANGED从意图中采取操作，然后检查它是哪个操作。它非常适合蓝牙
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
和
switch (action) {
case BluetoothAdapter.ACTION_DISCOVERY_STARTED: ...
但是它不会检查
String action = intent.getAction();。因此，我的问题是：
如何设置操作（
TelephonyManager.ACTION_PHONE_STATE_CHANGED）来侦听状态变化？addAction()不正确吗？如果我放弃并在AndroiManifest中设置接收器，如何设置蓝牙过滤器？我在用着
BluetoothDevice.ACTION_FOUND
BluetoothAdapter.ACTION_DISCOVERY_STARTED
BluetoothAdapter.ACTION_DISCOVERY_FINISHED
最佳答案
首先注册您的活动的接收者
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");
}
};