The difference between android8.0 and above versions and android7.0 notifications is that the above versions must add the channel NotificationChannel
before creating a notification. You need to make a judgment on the android version.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
There is only one Button in the activity_main.xml code to respond to the notification, and the code no longer displays the
MainActivity.java code as follows:
public class MainActivity extends AppCompatActivity {
private Button GetNotification;
private static final int ID = 1;
private static final String CHANNELID ="1";
private static final String CHANNELNAME = "channel1";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GetNotification = (Button) findViewById(R.id.GetNotification);
GetNotification.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// manager.cancel(1);
//安卓8.0以上弹出通知需要添加渠道NotificationChannel
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
//创建渠道
/**
* importance:用于表示渠道的重要程度。这可以控制发布到此频道的中断通知的方式。
* 有以下6种重要性，是NotificationManager的静态常量，依次递增:
* IMPORTANCE_UNSPECIFIED（值为-1）意味着用户没有表达重要性的价值。此值用于保留偏好设置，不应与实际通知关联。
* IMPORTANCE_NONE（值为0）不重要的通知：不会在阴影中显示。
* IMPORTANCE_MIN（值为1）最低通知重要性：只显示在阴影下，低于折叠。这不应该与Service.startForeground一起使用，因为前台服务应该是用户关心的事情，所以它没有语义意义来将其通知标记为最低重要性。如果您从Android版本O开始执行此操作，系统将显示有关您的应用在后台运行的更高优先级通知。
* IMPORTANCE_LOW（值为2）低通知重要性：无处不在，但不侵入视觉。
* IMPORTANCE_DEFAULT （值为3）：默认通知重要性：随处显示，产生噪音，但不会在视觉上侵入。
* IMPORTANCE_HIGH（值为4）更高的通知重要性：随处显示，造成噪音和窥视。可以使用全屏的Intent。
*/
NotificationChannel channel = new NotificationChannel(CHANNELID,CHANNELNAME,NotificationManager.IMPORTANCE_HIGH);
manager.createNotificationChannel(channel);//开启渠道
Intent intent = new Intent(MainActivity.this,notification.class);
PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this,0,intent,0);
NotificationCompat.Builder builder = new NotificationCompat.Builder(MainActivity.this,CHANNELID);
builder .setContentTitle("Title")//通知标题
.setContentText("ContentText")//通知内容
.setWhen(System.currentTimeMillis())//通知显示时间
.setContentIntent(pendingIntent)
.setSmallIcon(R.drawable.smile)
.setAutoCancel(true)//点击通知取消
//.setSound()
//第一个参数为手机静止时间，第二个参数为手机震动时间，周而复始
.setVibrate(new long[] {0,1000,1000,1000})//手机震动
//第一个参数为LED等颜色，第二个参数为亮的时长，第三个参数为灭的时长
.setLights(Color.BLUE,1000,1000)
/**表示通知的重要程度
* RIORITY_DEFAULT
* RIORITY_MIN
* RIORITY_LOW
* RIORITY_HIGE
* RIORITY_MAX
**/
.setPriority(NotificationCompat.PRIORITY_MAX)
.setLargeIcon(BitmapFactory.decodeResource(getResources(),R.drawable.smile)).build();
manager.notify(1,builder.build());
} else{
Notification notification = new NotificationCompat.Builder(MainActivity.this)
.setContentTitle("Title")
.setContentText("ContentText")
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.drawable.smile)
.setLargeIcon(BitmapFactory.decodeResource(getResources(),R.drawable.smile))
.build();
manager.notify(1,notification);
}
}
});
}
}
We also need to create an activity notification to respond to the operation performed after clicking the notification. Here, a TextView is used to display a piece of text.
If you want to set the phone vibration, you must declare the permissions in the manifest file.
<uses-permission android:name="android.permission.VIBRATE"/>
The renderings are as follows:
We click the button, and the notification appears.
Click the notification to jump to the notification activity.
Because we set .setAutoCancel(true), the notification disappears after all the notifications are clicked.
