Android 通知使用

这里直接复制官方给的Demo,之后再补充细节

官方GitHub的通知Demo(加入了通知Channel):

https://github.com/googlesamples/android-NotificationChannels/

 

Notification.Builder是API26中的类,旧版用NotificationCompat.Builder

PendingIntent可以设置通知和前台服务的点击跳转

通知没什么难点,主要还是要去看官方API文档了解各种设置的方法

 

MainActivity

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;

/**
 * Display main screen for sample. Displays controls for sending test notifications.
 */
public class MainActivity extends Activity {
    private static final String TAG = MainActivity.class.getSimpleName();

    private static final int NOTI_PRIMARY1 = 1100;
    private static final int NOTI_PRIMARY2 = 1101;
    private static final int NOTI_SECONDARY1 = 1200;
    private static final int NOTI_SECONDARY2 = 1201;

    /*
     * A view model for interacting with the UI elements.
     */
    private MainUi ui;

    /*
     * A
     */
    private NotificationHelper noti;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        noti = new NotificationHelper(this);
        ui = new MainUi(findViewById(R.id.activity_main));
    }

    /**
     * Send activity notifications.
     *
     * @param id The ID of the notification to create
     * @param title The title of the notification
     */
    public void sendNotification(int id, String title) {
        Notification.Builder nb = null;
        switch (id) {
            case NOTI_PRIMARY1:
                nb = noti.getNotification1(title, getString(R.string.primary1_body));
                break;

            case NOTI_PRIMARY2:
                nb = noti.getNotification1(title, getString(R.string.primary2_body));
                break;

            case NOTI_SECONDARY1:
                nb = noti.getNotification2(title, getString(R.string.secondary1_body));
                break;

            case NOTI_SECONDARY2:
                nb = noti.getNotification2(title, getString(R.string.secondary2_body));
                break;
        }
        if (nb != null) {
            noti.notify(id, nb);
        }
    }

    /**
     * Send Intent to load system Notification Settings for this app.
     */
    public void goToNotificationSettings() {
        Intent i = new Intent(Settings.ACTION_APP_NOTIFICATION_SETTINGS);
        i.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());
        startActivity(i);
    }

    /**
     * Send intent to load system Notification Settings UI for a particular channel.
     *
     * @param channel Name of channel to configure
     */
    public void goToNotificationSettings(String channel) {
        Intent i = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS);
        i.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());
        i.putExtra(Settings.EXTRA_CHANNEL_ID, channel);
        startActivity(i);
    }

    /**
     * View model for interacting with Activity UI elements. (Keeps core logic for sample
     * seperate.)
     */
    class MainUi implements View.OnClickListener {
        final TextView titlePrimary;
        final TextView titleSecondary;

        private MainUi(View root) {
            titlePrimary = (TextView) root.findViewById(R.id.main_primary_title);
            ((Button) root.findViewById(R.id.main_primary_send1)).setOnClickListener(this);
            ((Button) root.findViewById(R.id.main_primary_send2)).setOnClickListener(this);
            ((ImageButton) root.findViewById(R.id.main_primary_config)).setOnClickListener(this);

            titleSecondary = (TextView) root.findViewById(R.id.main_secondary_title);
            ((Button) root.findViewById(R.id.main_secondary_send1)).setOnClickListener(this);
            ((Button) root.findViewById(R.id.main_secondary_send2)).setOnClickListener(this);
            ((ImageButton) root.findViewById(R.id.main_secondary_config)).setOnClickListener(this);

            ((Button) root.findViewById(R.id.btnA)).setOnClickListener(this);
        }

        private String getTitlePrimaryText() {
            if (titlePrimary != null) {
                return titlePrimary.getText().toString();
            }
            return "";
        }

        private String getTitleSecondaryText() {
            if (titlePrimary != null) {
                return titleSecondary.getText().toString();
            }
            return "";
        }

        @Override
        public void onClick(View view) {
            switch (view.getId()) {
                case R.id.main_primary_send1:
                    sendNotification(NOTI_PRIMARY1, getTitlePrimaryText());
                    break;
                case R.id.main_primary_send2:
                    sendNotification(NOTI_PRIMARY2, getTitlePrimaryText());
                    break;
                case R.id.main_primary_config:
                    goToNotificationSettings(NotificationHelper.PRIMARY_CHANNEL);
                    break;

                case R.id.main_secondary_send1:
                    sendNotification(NOTI_SECONDARY1, getTitleSecondaryText());
                    break;
                case R.id.main_secondary_send2:
                    sendNotification(NOTI_SECONDARY2, getTitleSecondaryText());
                    break;
                case R.id.main_secondary_config:
                    goToNotificationSettings(NotificationHelper.SECONDARY_CHANNEL);
                    break;
                case R.id.btnA:
                    goToNotificationSettings();
                    break;
                default:
                    Log.e(TAG, "Unknown click event.");
                    break;
            }
        }
    }
}

NotificationHelper

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.content.ContextWrapper;
import android.graphics.Color;
import android.text.TextUtils;

/**
 * Helper class to manage notification channels, and create notifications.
 */
class NotificationHelper extends ContextWrapper {
    private NotificationManager manager;
    public static final String PRIMARY_CHANNEL = "default";
    public static final String SECONDARY_CHANNEL = "second";

    /**
     * Registers notification channels, which can be used later by individual notifications.
     *
     * @param ctx The application context
     */
    public NotificationHelper(Context ctx) {
        super(ctx);

        NotificationChannel chan1 = new NotificationChannel(PRIMARY_CHANNEL,
                getString(R.string.noti_channel_default), NotificationManager.IMPORTANCE_DEFAULT);
        chan1.setLightColor(Color.GREEN);
        chan1.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
        getManager().createNotificationChannel(chan1);

        NotificationChannel chan2 = new NotificationChannel(SECONDARY_CHANNEL,
                getString(R.string.noti_channel_second), NotificationManager.IMPORTANCE_HIGH);
        chan2.setLightColor(Color.BLUE);
        chan2.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
        getManager().createNotificationChannel(chan2);
    }

    /**
     * Get a notification of type 1
     *
     * Provide the builder rather than the notification it's self as useful for making notification
     * changes.
     *
     * @param title the title of the notification
     * @param body the body text for the notification
     * @return the builder as it keeps a reference to the notification (since API 24)
    */
    public Notification.Builder getNotification1(String title, String body) {
        return new Notification.Builder(getApplicationContext(), PRIMARY_CHANNEL)
                 .setContentTitle(title)
                 .setContentText(body)
                 .setSmallIcon(getSmallIcon())
                 .setAutoCancel(true);
    }

    /**
     * Build notification for secondary channel.
     *
     * @param title Title for notification.
     * @param body Message for notification.
     * @return A Notification.Builder configured with the selected channel and details
     */
    public Notification.Builder getNotification2(String title, String body) {
        return new Notification.Builder(getApplicationContext(), SECONDARY_CHANNEL)
                 .setContentTitle(title)
                 .setContentText(body)
                 .setSmallIcon(getSmallIcon())
                 .setAutoCancel(true);
    }

    /**
     * Send a notification.
     *
     * @param id The ID of the notification
     * @param notification The notification object
     */
    public void notify(int id, Notification.Builder notification) {
        getManager().notify(id, notification.build());
    }

    /**
     * Get the small icon for this app
     *
     * @return The small icon resource id
     */
    private int getSmallIcon() {
        return android.R.drawable.stat_notify_chat;
    }

    /**
     * Get the notification manager.
     *
     * Utility method as this helper works with it a lot.
     *
     * @return The system service NotificationManager
     */
    private NotificationManager getManager() {
        if (manager == null) {
            manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        }
        return manager;
    }
}