自定义Notification

 可以通过Notification.Builder.setContent方法自定义Notification。setContent方法的原型如下：

public Builder setContent(RemoteViews views);

 RemoteViews 是一种视图容器，只是这种视图容器支持的视图有限，目前RemoteViews 只支持布局和控件：
 布局：
FrameLayout、LinearLayout、RelativeLayout
 控件：
AnalogClock、Button、Chronometer、ImageButton、ImageView、ProgressBar、TextView

 RemoteViews类构造方法的原型如下：

public RemoteViews(String packageName, int layout);

      packageName:包名
      layout与RemoteViews对象关联的布局资源ID

public class NotificationActivity extends Activity {

    private NotificationManager manager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    }

    /**
     * 显示通知
     * @param view
     */
    public void showNotification(View view){
        //创建RemoteViews对象
        RemoteViews remoteViews = new RemoteViews(getPackageName(),R.layout.notification);
        //设置布局中的TextView显示的文本
        remoteViews.setTextViewText(R.id.tv001,"更新自定义文本内容");
        //创建Builder对象
        Notification.Builder builder = new Notification.Builder(this)
                .setSmallIcon(R.drawable.person).setContent(remoteViews);
        //显示自定义的Notification
        manager.notify(1,builder.build());
    }
}

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

    <TextView
        android:id="@+id/tv001"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="@android:color/black"
        android:gravity="center"
        android:textSize="20dp"
        android:text="自定义内容"/>

    <ImageView
        android:id="@+id/iv001"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:src="@drawable/person" />
LinearLayout>