java - 实现 AddProximityAlert

Question

Android/Java 新手，我正在使用 AddProximityAlert()。我下面有以下代码块，并且不断收到错误。有人可以解释一下 Eclipse 的意思，以及如何解决 getBroadcast 和 registerReceiver 遇到的错误吗？

在SecondaryActivity.java文件中，我有2个广播接收器，这可能是原因吗？

SecondaryActivity.java:

public class SecondaryActivity extends BroadcastReceiver {   

public void onReceive(Context context, Intent intent) {

.
.
.

lm = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);

double latitude = location.getLatitude();
double longitude = location.getLongitude();
float radius = 100f;
long expiration = -1;
final String PROX_ALERT_INTENT = "com.example.test";

Intent intent = new Intent(PROX_ALERT_INTENT);
PendingIntent proximityIntent = PendingIntent.**getBroadcast**(this, 0, intent, 0);

lm.addProximityAlert(latitude, longitude, radius, expiration, proximityIntent);

IntentFilter filter = new IntentFilter(PROX_ALERT_INTENT);

**registerReceiver**(new ProximityIntentReceiver(), filter);

.
.
.

private class ProximityIntentReceiver extends BroadcastReceiver {

...

getBroadcast:PendingIntent 类型中的方法 getBroadcast(Context, int, Intent, int) 不适用于参数 (SecondaryActivity, int, Intent, int)

registerReceiver:SecondaryActivity 类型的方法 registerReceiver(SecondaryActivity.ProximityIntentReceiver, IntentFilter) 未定义

Answer 1

因为您要扩展 BroadcastReceiver，所以需要使用:

PendingIntent.getBroadcast(context, 0, intent, 0)

和

context.registerReceiver()

引用 Context 类。

此外，命名 BroadcastReceiver SecondaryActivity 有点令人困惑，因为 SecondaryActivity 不是一个 Activity。