如何在通知管理器Android的ContentText中显示可变或数据

Question

嗨，我在Android中创建一个AAC播放器应用程序，我已经有这样的通知管理器：

Context context = getApplicationContext();
String ns = Context.NOTIFICATION_SERVICE;
int icon = R.drawable.icon;
CharSequence tickerText = "Now playing...";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon, tickerText, when);
CharSequence contentTitle = "My notification";
CharSequence contentText = "txtMetaTitle";
Intent notificationIntent = new Intent(AACPlayerActivity.this, Principal.class);
notification.flags = Notification.FLAG_ONGOING_EVENT;
PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0);
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
mNotificationManager.notify(1, notification);

但是，现在我试图将安装正常的文本插入，例如 char sequence contentTitle ="我的通知"; 在我的情况下显示一个变量。

我已经在打开一个广播电台时已经显示了此徽标图像，url，url，shoutcast url的标题，带有此代码：

public void playerMetadata( final String key, final String value ) {
    TextView tv = null;
    if ("StreamTitle".equals( key ) || "icy-name".equals( key ) || "icy-description".equals( key )) {
        tv = txtMetaTitle;
    }
    else if ("icy-url".equals( key )) {
        tv = txtMetaUrl;
    }
    else return;
    final TextView ftv = tv;
    uiHandler.post( new Runnable() {
        public void run() {
            ftv.setText( value );
        }
    });
}

我如何显示例如 txtMetatitle 并在通知中实现它：

CharSequence contentTitle = "My notification";
CharSequence contentText = "txtMetaTitle";

向shoutcast显示元数据？

非常感谢。

编辑：

完整代码：

 private void start() {
        stop();
        txtMetaTitle.setText("");
        txtMetaGenre.setText("");
        txtMetaUrl.setText("");
        multiPlayer = new MultiPlayer( this, getInt( txtBufAudio ), getInt( txtBufDecode ));
        //multiPlayer.playAsync(getUrl());
        Log.d(TAG, "onClick: starting srvice");

        myIntent = new Intent(this, MyService.class);
        myIntent.putExtra("URL", getUrl());
        myIntent.putExtra("MP",new  Sharable(multiPlayer));
        startService(myIntent);
        Context context = getApplicationContext();
        String ns = Context.NOTIFICATION_SERVICE;
        int icon = R.drawable.icon;
        CharSequence tickerText = "Now playing...";
        long when = System.currentTimeMillis();
        Notification notification = new Notification(icon, tickerText, when);
        CharSequence contentTitle = "My notification";
        CharSequence contentText = txtMetaTitle.getText();
        Intent notificationIntent = new Intent(AACPlayerActivity.this, Principal.class);
        notification.flags = Notification.FLAG_ONGOING_EVENT;
        PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0);
        notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
       NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
       mNotificationManager.notify(1, notification);
    }

我修复了在此内移动通知服务：

 public void playerMetadata( final String key, final String value ) {
        TextView tv = null;
        if ("StreamTitle".equals( key ) || "icy-name".equals( key ) || "icy-description".equals( key )) {
            tv = txtMetaTitle;
        }
        else if ("icy-url".equals( key )) {
            tv = txtMetaUrl;
        }
        else return;
        final TextView ftv = tv;
        uiHandler.post( new Runnable() {
            public void run() {
                ftv.setText( value );
                System.out.println("Now playing..." + txtMetaTitle.getText().toString());
                Context context = getApplicationContext();
                String ns = Context.NOTIFICATION_SERVICE;
                int icon = R.drawable.icon;
                CharSequence tickerText = "Now playing...";
                long when = System.currentTimeMillis();
                Notification notification = new Notification(icon, tickerText, when);
                CharSequence contentTitle = txtMetaTitle.getText().toString();
                CharSequence contentText = txtMetaUrl.getText().toString();
                Intent notificationIntent = new Intent(AACPlayerActivity.this, Principal.class);
                notification.flags = Notification.FLAG_ONGOING_EVENT;
                PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
                //PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0);
                notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
               NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
               mNotificationManager.notify(1, notification);
            }
        });
    }

Answer 1

带有默认通知布局，您将获得两行：标题和文本。如果您想要更多的灵活性，则必须创建一个自定义布局。

而不是设置标题和文本，请实例化 RemoteViews，

RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.custom);

，然后将其设置为您的通知对象

mNotification.contentView = contentView;

RemoteViews的工作方式与普通视图有所不同。您必须调用RemoteViews对象上的方法以将值设置为内部的视图。例如，

contentView.setTextViewText(R.id.text_view_id, "Hello, world.");

您可以看到，可以在布局中使用的视图类型，并且可以对其进行调用的方法受到限制。