android通知适配

代码

package com.xtm.call.watchdemo;

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.TaskStackBuilder;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.NotificationCompat;
import android.support.v7.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                showNotification(MainActivity.this);
            }
        },5000);
    }

    /**
     * 显示通知栏 * @param context 上下文对象 
     */
    private void showNotification(Context ctx) {
        int NOTIFICATION_ID = 234;
        NotificationManager notificationManager = (NotificationManager) ctx.getSystemService(Context.NOTIFICATION_SERVICE);
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            String CHANNEL_ID = "my_channel_01";
            CharSequence name = "my_channel";
            String Description = "This is my channel";
            int importance = NotificationManager.IMPORTANCE_HIGH;
            NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, name, importance);
            mChannel.setDescription(Description);
            mChannel.enableLights(true);
            mChannel.setLightColor(Color.RED);
            mChannel.enableVibration(true);
            mChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
            mChannel.setShowBadge(false);
            notificationManager.createNotificationChannel(mChannel);
        }
        String CHANNEL_ID = "my_channel_01";
        NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx, CHANNEL_ID)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("this is title")
                .setContentText("this is msg content");

        Intent resultIntent = new Intent(ctx, MainActivity.class);
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(ctx);
        stackBuilder.addParentStack(MainActivity.class);
        stackBuilder.addNextIntent(resultIntent);
        PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
        builder.setContentIntent(resultPendingIntent);
        notificationManager.notify(NOTIFICATION_ID, builder.build());
    }

}

代码来自：https://stackoverflow.com/questions/45711925/failed-to-post-notification-on-channel-null-target-api-is-26