当应用程序在后台时如何显示来电？安卓答案

【问题标题】：How to show incoming call when the app is in background? Android当应用程序在后台时如何显示来电？安卓
【发布时间】：2020-07-26 10:40:20
【问题描述】：

这就是我试图在后台执行的操作，但没有任何反应。我正在使用推送通知（Firebase 消息服务）来运行此代码。

        phoneAccountHandle = PhoneAccountHandle(
            ComponentName(
                packageName,
                DoctorConnectionService::class.java.name
            ), phoneAccountHandleId
        )
        val builder = PhoneAccount.builder(phoneAccountHandle, "My account")
        builder.setCapabilities(PhoneAccount.CAPABILITY_CALL_PROVIDER or PhoneAccount.CAPABILITY_CONNECTION_MANAGER)
        val phoneAccount = builder.build()
        val test = telecomManager
        telecomManager?.registerPhoneAccount(phoneAccount)
        telecomManager?.addNewIncomingCall(phoneAccountHandle, Bundle())

【问题讨论】：

标签： android kotlin telecom-manager android-connectionservice

【解决方案1】：

你可以试试 BroadcastReceiver。这是我的 BroadcastReceiver 的类和 MainActivity。在这里，我只是在应用程序处于后台时发送一条消息（来电）：

主活动：

public class MainActivity extends AppCompatActivity {
BroadcastReceiver callReceiver;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
    checkPermission();
    callReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
          /*Do Whatever You Want When You Reciveing a Call And App is Open*/
        }
    };
    IntentFilter callFilter = new IntentFilter("android.intent.action.PHONE_STATE");
    registerReceiver(callReceiver, callFilter);
}

@Override
protected void onDestroy() {
    super.onDestroy();
    unregisterReceiver(callReceiver);
}

private void checkPermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_PHONE_STATE}, 100);
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == 100) {

    }
  }
}

这是我的 BroadcastReceiver 类：

public class IncomingCallReciver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
    Toast.makeText(context, ".:Incoming Call:.", Toast.LENGTH_SHORT).show();
    /*Do Whatever You Want When You Reciveing a Call And App is In Background*/
  }
}

然后在Manifest中添加READ_PHONE_STATE权限，在Manifest中添加BroadcastReceiver的类，在Application Tag里面：

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

【讨论】：