Android 之通知Notification应用

女爷i 2022-09-28 11:42 199阅读 0赞

## 通知适用于应用不在前台运行的状态下，给用户的一种提醒方式。 ##

先上布局文件  
activity.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.example.androidnotification.MainActivity">
    
        <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="openNF" android:text="打开通知" />
    
        <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="sendBR" android:text="发送广播弹出通知" />
    
        <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="gxNF" android:text="个性化通知" />
    </LinearLayout>

activity\_notifition.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">
    
        <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:text="我是由通知打开的" android:textColor="@android:color/holo_blue_bright" android:textSize="18sp" />
    </LinearLayout>

MainActivity.class

public class MainActivity extends BaseActivity { 
    
        @Override
        protected int bindlayout() {
            return R.layout.activity_main;
        }
    
    
        public void openNF(View view) {
       //打开通知
            NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            Intent intent = new Intent(MainActivity.this, MainActivity.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
            NotificationCompat.Builder compat = new NotificationCompat.Builder(this);
            compat.setContentTitle("This is content title!");
            compat.setContentText("This is content text!");
            compat.setWhen(System.currentTimeMillis());
            compat.setContentIntent(pendingIntent);
            compat.setSmallIcon(android.R.drawable.sym_action_email);
            compat.setLargeIcon(BitmapFactory.decodeResource(getResources(), android.R.drawable.ic_dialog_map));
            compat.setAutoCancel(true);
    // compat.setSound()设置通知的声音
    // compat.setVibrate(new long[]{0,1000,500,1000});设置通知震动下表1表示静止的时长，下表2是震动的时长。（双数下标是静止时长，单数下标是震动时长）
    // compat.setLights(Color.RED,1000,1000);设置呼吸灯
    // compat.setDefaults(NotificationCompat.COLOR_DEFAULT);根据手机当前环境调节
            compat.build();
            Notification notification = compat.build();
            manager.notify(1, notification);
        }
    
        public void sendBR(View view) {
       //发送广播显示通知
            sendBroadcast(new Intent("com.example.androidnotification.receiver.SendBroadcastNotifitionReceiver"));
        }
    
        public void gxNF(View view) {
            NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            NotificationCompat.Builder compat = new NotificationCompat.Builder(this);
    
     //必须设置setSmallIcon，否则不显示通知 compat.setSmallIcon(android.R.drawable.stat_notify_sdcard_usb);
    // compat.setPriority(NotificationCompat.DEFAULT_ALL);默认的
    // compat.setPriority(NotificationCompat.PRIORITY_MIN);最低
    // compat.setPriority(NotificationCompat.PRIORITY_LOW);较低
    // compat.setPriority(NotificationCompat.PRIORITY_HIGH);较高重要程度的通知
    // compat.setPriority(NotificationCompat.PRIORITY_MAX);重要的
            Notification notification = compat.build();
            manager.notify(3, notification);
        }
    }

广播接受者  
SendBroadcastNotifitionReceiver.class

/* 发送广播显示通知 */
    public class SendBroadcastNotifitionReceiver extends BroadcastReceiver { 
    
        @Override
        public void onReceive(Context context, Intent intent) {
            intent = new Intent(context, NotifitionActivity.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
            NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
            NotificationCompat.Builder compat = new NotificationCompat.Builder(context);
            compat.setContentTitle("通知标题");
            compat.setContentText("通知的内容");
            compat.setSmallIcon(android.R.drawable.stat_notify_more);
            compat.setColor(Color.argb(0, 1, 2, 3));
            compat.setLargeIcon(BitmapFactory.decodeResource(context.getResources(), 1));
            compat.setContentIntent(pendingIntent);
            compat.build();
            compat.setAutoCancel(true);
            Notification notification = compat.build();
            manager.notify(2, notification);
        }
    }

通过发送广播来显示的通知，点击界面  
NotifitionActivity.class

public class NotifitionActivity extends BaseActivity { 
        @Override
        protected int bindlayout() {
       //加载布局
            return R.layout.activity_notifition;
        }
    }