Android API levelを意識したNotificationの実装例

MainActivity.java

package com.example.maruyama.helloandroid5;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        System.out.println(Build.VERSION_CODES.LOLLIPOP);

        TextView view = (TextView) this.findViewById(R.id.textView);
        view.setTextColor(Color.CYAN);

        Button button = (Button) this.findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                System.out.println("Notification: Start ----------------------");

                Context context = getApplicationContext();
                Intent bootIntent = new Intent(context, MainActivity.class);
                PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, bootIntent, 0);

                Notification.Builder builder = new Notification.Builder(context);
                builder.setContentTitle("test title");
                builder.setContentText("content is this");
                builder.setAutoCancel(true);
                builder.setContentIntent(pendingIntent);
                builder.setSmallIcon(R.drawable.notification_template_icon_bg);

                Notification notification;
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                    builder.setPriority(Notification.PRIORITY_MAX); // from 16
                    builder.setColor(Color.RED); // from 21
                    notification = builder.build();
                } else {
                    // for Android API level 15
                    notification = builder.getNotification(); // 11 -> 15
                }

                NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                manager.notify(7, notification);

                System.out.println("Notification: End ----------------------");
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}