Mengelola callback fence
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Setelah pagar didaftarkan, aplikasi Anda harus menambahkan callback untuk merespons
saat pagar dipicu. Anda dapat melakukannya dengan menggunakan subclass
BroadcastReceiver untuk menangani metode Intent dari pagar.
Sebelum menambahkan callback ke pagar, Anda harus
mendaftarkan pagar terlebih dahulu.
Membuat subclass BroadcastReceiver
Contoh berikut menunjukkan class FenceReceiver, yang memperluas
BroadcastReceiver. Class ini menerapkan
metode callback BroadcastReceiver.onReceive() untuk menangani semua metode Intent
yang berasal dari pagar yang dibuat oleh aplikasi Anda. Saat Intent diterima, metode
FenceState.extract()
digunakan untuk mendapatkan status pagar dan meneruskannya ke callback.
public class FenceReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
FenceState fenceState = FenceState.extract(intent);
if (TextUtils.equals(fenceState.getFenceKey(), FENCE_KEY)) {
String fenceStateStr;
switch (fenceState.getCurrentState()) {
case FenceState.TRUE:
fenceStateStr = "true";
break;
case FenceState.FALSE:
fenceStateStr = "false";
break;
case FenceState.UNKNOWN:
fenceStateStr = "unknown";
break;
default:
fenceStateStr = "unknown value";
}
mLogFragment.getLogView().println("Fence state: " + fenceStateStr);
}
}
}
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-08-31 UTC.
[null,null,["Terakhir diperbarui pada 2025-08-31 UTC."],[[["\u003cp\u003eAfter registering a fence, your app needs to add a callback to respond when the fence is triggered.\u003c/p\u003e\n"],["\u003cp\u003eCallbacks for fences are implemented using a subclass of \u003ccode\u003eBroadcastReceiver\u003c/code\u003e to manage \u003ccode\u003eIntent\u003c/code\u003e methods.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eBroadcastReceiver.onReceive()\u003c/code\u003e method within the subclass handles \u003ccode\u003eIntent\u003c/code\u003e methods from the fences your app has created.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eFenceState.extract()\u003c/code\u003e method is used to retrieve the fence state from a received \u003ccode\u003eIntent\u003c/code\u003e and provide it to the callback.\u003c/p\u003e\n"]]],["After registering a fence, a callback must be added to respond when it's triggered. This is achieved by creating a subclass of `BroadcastReceiver`. The `FenceReceiver` class, extending `BroadcastReceiver`, implements the `onReceive()` method. Upon receiving an `Intent` from a fence, `FenceState.extract()` retrieves the fence state. The code then checks the fence key and current state (`TRUE`, `FALSE`, or `UNKNOWN`) to update the log view. This allows the app to react to fence state changes.\n"],null,["# Manage fence callbacks\n\nOnce a fence is registered, your app must add a callback to respond\nwhen the fence is triggered. You can do this with the use of a subclass of\n`BroadcastReceiver` to handle `Intent` methods from fences.\n\nBefore you add callbacks to a fence, you must first\n[register](/awareness/android-api/fence-register) the fence.\n\nCreate a subclass of BroadcastReceiver\n--------------------------------------\n\nThe following example shows the `FenceReceiver` class, which extends\n`BroadcastReceiver`. The class implements the\n`BroadcastReceiver.onReceive()` callback method to handle all `Intent` methods\nthat originate from fences created by your app. When an `Intent` is received, the\n[`FenceState.extract()`](/android/reference/com/google/android/gms/awareness/fence/FenceState#extract(android.content.Intent))\nmethod is used to get the fence state and pass it to the callback. \n\n public class FenceReceiver extends BroadcastReceiver {\n\n @Override\n public void onReceive(Context context, Intent intent) {\n\n FenceState fenceState = FenceState.extract(intent);\n\n if (TextUtils.equals(fenceState.getFenceKey(), FENCE_KEY)) {\n String fenceStateStr;\n switch (fenceState.getCurrentState()) {\n case FenceState.TRUE:\n fenceStateStr = \"true\";\n break;\n case FenceState.FALSE:\n fenceStateStr = \"false\";\n break;\n case FenceState.UNKNOWN:\n fenceStateStr = \"unknown\";\n break;\n default:\n fenceStateStr = \"unknown value\";\n }\n mLogFragment.getLogView().println(\"Fence state: \" + fenceStateStr);\n }\n }\n }"]]
