我创建了一个 android 通知,编译后的 sdk 版本为 28,最小 sdk 版本为 26,我实际上开发了需要通知的 android,所以 1st 我创建了一个与我的 FirstApplication 分开的 android 通知,它工作正常但是当我添加它时notification 在我的 FirstApplication 中,通知没有出现。
应用程序.java
import android.app.Application;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.os.Build;
public class App extends Application {
public static final String CHANNEL_1_ID = "channel1";
public static final String CHANNEL_2_ID = "channel2";
@Override
public void onCreate() {
super.onCreate();
createNotificationChannels();
}
private void createNotificationChannels() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel channel1 = new NotificationChannel(
CHANNEL_1_ID,
"Channel 1",
NotificationManager.IMPORTANCE_HIGH
);
channel1.setDescription("This is Channel 1");
NotificationChannel channel2 = new NotificationChannel(
CHANNEL_2_ID,
"Channel 2",
NotificationManager.IMPORTANCE_LOW
);
channel2.setDescription("This is Channel 2");
NotificationManager manager = getSystemService(NotificationManager.class);
manager.createNotificationChannel(channel1);
manager.createNotificationChannel(channel2);
}
}
}
主 Activity .java
import android.app.Notification;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.NotificationManagerCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import static com.project.cms.App.CHANNEL_1_ID;
import static com.project.cms.App.CHANNEL_2_ID;
public class MainActivity extends AppCompatActivity {
private NotificationManagerCompat notificationManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
notificationManager = NotificationManagerCompat.from(this);
sendchannel()
sendchannel2()
}
public void sendchannel(){
Notification notification = new NotificationCompat.Builder(this, CHANNEL_1_ID)
.setSmallIcon(R.drawable.ic_one)
.setContentTitle("Appointment Request")
.setContentText("ACCEPTED")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setCategory(NotificationCompat.CATEGORY_MESSAGE)
.build();
notificationManager.notify(1, notification);
}
public void sendchannel2(){
Notification notification = new NotificationCompat.Builder(this, CHANNEL_2_ID)
.setSmallIcon(R.drawable.ic_one)
.setContentTitle("Appointment Request")
.setContentText("DECLINED")
.setPriority(NotificationCompat.PRIORITY_LOW)
.build();
notificationManager.notify(2, notification);
}
}
当我打开应用程序时,应该会出现通知,但它不起作用。所以我请求你们帮助我并检查我的代码是否遗漏了什么。
最佳答案
看看这个我想说什么:-
在你的应用标签中添加 name="App"这是你创建 channel 的类名,也是对Application类的扩展
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.SET_WALLPAPER"/>
<permission android:name="android.permission.MEDIA_CONTENT_CONTROL" />
<application
android:name=".notification"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Main2Activity" />
<activity android:name=".Main3Activity"/>
<service android:name=".MyService"
android:enabled="true"/>
<service android:name=".Service"
android:enabled="true"/>
<provider
android:authorities="${applicationId}.provider"
android:name="android.support.v4.content.FileProvider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"/>
</provider>
</application>
关于java - 为什么我的 android-notification 没有出现?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55430447/