通过remoteViews自定义Notification通知栏的布局

remoteViews,是一种远程view，通过跨进程更新自己的界面，主要用于通知栏和桌面小部件的开发过程中。

1、通知栏的实现

public class MainActivity extends Activity implements View.OnClickListener {

    private Button btn_one,btn_two,btn_three,btn_four;
    private NotificationManager manager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn_one = (Button) findViewById(R.id.btn_one);
        btn_one.setOnClickListener(this);
        btn_two = (Button) findViewById(R.id.btn_two);
        btn_two.setOnClickListener(this);
        btn_three = (Button) findViewById(R.id.btn_three);
        btn_three.setOnClickListener(this);
        btn_four = (Button) findViewById(R.id.btn_four);
        btn_four.setOnClickListener(this);
        manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.btn_one://默认通知
                PendingIntent pendingIntent1=PendingIntent.getActivity(this,0,new Intent(this,OtherActivity.class),PendingIntent.FLAG_UPDATE_CURRENT);
                Notification notification1=new Notification();
                notification1.icon=R.drawable.head;
                notification1.when=System.currentTimeMillis();
                notification1.tickerText="您有新短消息，请注意查收！";
                notification1.contentIntent=pendingIntent1;
                manager.notify(1,notification1);

                break;
            case R.id.btn_two://API11之后使用
                PendingIntent pendingIntent2=PendingIntent.getActivity(this,0,new Intent(this,OtherActivity.class),PendingIntent.FLAG_UPDATE_CURRENT);
                Notification notification2=new Notification.Builder(this)
                        .setSmallIcon(R.drawable.head)//即便自定义了图标，但有时候还是显示系统默认的，应该与手机类型有关
                        .setContentTitle("好消息")
                        .setContentText("API11之后的通知")
                        .setTicker("hello world")
                        .setWhen(System.currentTimeMillis())
                        .setContentIntent(pendingIntent2)
                        .setNumber(1)       //在最右侧现实。这个number起到一个序列号的作用，如果多个触发多个通知（同一ID），可以指定显示哪一个。
                        .getNotification(); //build()是在API16及之后增加的，在API11中可以使用getNotificatin()来代替
                manager.notify(1,notification2);
                break;
            case R.id.btn_three://API16之后使用
                PendingIntent pendingIntent3=PendingIntent.getActivity(this,0,new Intent(this,OtherActivity.class),PendingIntent.FLAG_UPDATE_CURRENT);
                Notification notification3=new Notification.Builder(this)
                        .setSmallIcon(R.drawable.head)
                        .setContentTitle("好消息")
                        .setContentText("API16之后的通知")
                        .setTicker("hello world")
                        .setWhen(System.currentTimeMillis())
                        .setContentIntent(pendingIntent3)
                        .setNumber(1)
                        .build();
                manager.notify(1,notification3);
                break;
            case R.id.btn_four://自定义通知，
                Notification notification = new Notification();
                notification.when = System.currentTimeMillis();
                notification.flags = Notification.FLAG_AUTO_CANCEL;
                notification.tickerText = "hello world";
                notification.icon = R.drawable.head;//这是个坑，如果不设置icon，通知不显示

                Intent intent = new Intent(MainActivity.this, OtherActivity.class);
                PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
                RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.remote_layout);
                remoteViews.setTextViewText(R.id.tv_title, "请假条");
                remoteViews.setTextViewText(R.id.tv_content, "世界这么大，我想去看看");
                remoteViews.setImageViewResource(R.id.iv_head, R.drawable.head);

                notification.contentIntent = pendingIntent;
                notification.contentView = remoteViews;
                manager.notify(1, notification);
                break;
        }
    }
}

通知栏的布局remote_layout

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/iv_head"
        android:layout_width="40dp"
        android:layout_height="40dp" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="10dp"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tv_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="标题" />

        <TextView
            android:id="@+id/tv_content"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingTop="3dp"
            android:text="内容。。。。" />
    LinearLayout>
LinearLayout>