在Android开发中,PhoneWindow
类通常不直接用于显示通知栏。相反,你应该使用 NotificationManagerCompat
类来显示通知。以下是一个简单的示例,展示了如何使用 NotificationManagerCompat
显示一个基本的通知:
-
添加必要的权限: 在你的
AndroidManifest.xml
文件中添加以下权限: -
创建通知渠道(适用于Android 8.0及以上版本):
import android.app.NotificationChannel; import android.app.NotificationManager; import android.content.Context; import androidx.core.app.NotificationCompat; import androidx.core.app.NotificationManagerCompat; public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); createNotificationChannel(); } private void createNotificationChannel() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { CharSequence name = getString(R.string.channel_name); String description = getString(R.string.channel_description); int importance = NotificationManager.IMPORTANCE_DEFAULT; NotificationChannel channel = new NotificationChannel("my_channel_id", name, importance); channel.setDescription(description); NotificationManager notificationManager = getSystemService(NotificationManager.class); notificationManager.createNotificationChannel(channel); } } }
-
显示通知:
import android.app.NotificationCompat; import android.content.Context; import androidx.core.app.NotificationManagerCompat; public class MyService extends Service { @Override public int onStartCommand(Intent intent, int flags, int startId) { NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "my_channel_id") .setSmallIcon(R.drawable.ic_notification) .setContentTitle("My Notification") .setContentText("Hello, this is a notification!") .setAutoCancel(true); NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this); notificationManager.notify(1, builder.build()); return START_NOT_STICKY; } @Override public IBinder onBind(Intent intent) { return null; } }
-
在
AndroidManifest.xml
中声明服务: -
启动服务: 你可以通过以下方式启动服务:
Intent serviceIntent = new Intent(this, MyService.class); startService(serviceIntent);
通过上述步骤,你可以使用 NotificationManagerCompat
类来显示一个基本的通知。如果你需要更复杂的通知功能,可以进一步自定义 NotificationCompat.Builder
对象。