java - 如何在自定义通知中引用 View

Question

在下面发布的代码中，我创建了一个具有自定义布局的通知。通知的布局包含三个操作按钮。

我现在遇到的问题是，我无法引用代码中的任何按钮，因此我可以根据单击的操作按钮导航到另一个 Activity 。我想做的是当 Action button 1 单击然后显示 Activity 1，当单击 Action button 2 时 Activity 2 显示，依此类推。

请告诉我如何在通知的自定义布局中引用 View ？

代码:

public class MainActivity extends AppCompatActivity {

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

        // Using RemoteViews to bind custom layouts into Notification
        RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.layout_notification);
        String notification_title = "Notification_Title";
        String notification_text = "Notification_Text";

        // Open NotificationView Class on Notification Click
        Intent intent = new Intent(this, NotificationReply.class);
        // Send data to NotificationView Class
        intent.putExtra("title", notification_title);
        intent.putExtra("text", notification_text);
        // Open NotificationView.java Activity
        PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent,PendingIntent.FLAG_UPDATE_CURRENT);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                // Set Icon
                .setSmallIcon(R.mipmap.ic_launcher)
                // Set Ticker Message
                .setTicker("Ticker")
                // Dismiss Notification
                .setAutoCancel(true)
                // Set PendingIntent into Notification
                .setContentIntent(pIntent)
                // Set RemoteViews into Notification
                .setContent(remoteViews);

        Intent intentAction1 = new Intent(this, ActAction1.class);
        PendingIntent pendingIntentActAction1 = PendingIntent.getBroadcast(this, 1,intentAction1, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteViews.setOnClickPendingIntent(R.id.btn_action1, pendingIntentActAction1);

        Intent intentAction2 = new Intent(this, ActAction2.class);
        PendingIntent pendingIntentActAction2 = PendingIntent.getBroadcast(this, 2,intentAction2, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteViews.setOnClickPendingIntent(R.id.btn_action2, pendingIntentActAction2);

        Intent intentAction3 = new Intent(this, ActAction3.class);
        PendingIntent pendingIntentActAction3 = PendingIntent.getBroadcast(this, 3,intentAction3, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteViews.setPendingIntentTemplate(R.id.btn_action3, pendingIntentActAction3);

        // Create Notification Manager
        NotificationManager notificationmanager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

        // Build Notification with Notification Manager
        notificationmanager.notify(0, builder.build());
    }
}

Answer 1

导航成功的关键是使用正确的待定 Intent 并为您的 requestCode 使用不同的值。

您可以在 broadcastReceiver 中接收事件，以这种方式构建未决 Intent (例如，使用参数):

private PendingIntent buildPendingIntent(String someurl) {
        Intent intent= new Intent(mContext, SomeReceiver.class);
        final Uri uri = Uri.parse(someurl);
        intent.setData(uri);
        intent.setAction(Intent.ACTION_VIEW);
        intent.putExtra(KEY, VALUE)

        return PendingIntent.getBroadcast(mContext.getApplicationContext(),
                CONSTANT_FOR_THIS_INTENT_TYPE, intent,
                PendingIntent.FLAG_CANCEL_CURRENT);
    }

或者您可以仅通过待定 Intent 导航到 Activity :

private PendingIntent buildPendingIntent2() {
        Intent intent = new Intent(mContext, SomeActivity.class);
        intent.putExtra(KEY, VALUE);
        settingsIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        return PendingIntent.getActivity(mContext.getApplicationContext(),
                                         OTHER_CONSTANT_FOR_OTHER_ACTION,
                                         intent, PendingIntent.FLAG_UPDATE_CURRENT);
    }

请注意 CONSTANT_FOR_THIS_INTENT_TYPE 和 OTHER_CONSTANT_FOR_OTHER_ACTION 必须具有不同的值

在你有了这个未决的 Intent 之后，你应该将它们附加到你的 View 中:

view.setOnClickPendingIntent(com.app.btn1, buildPendingIntent1());
view.setOnClickPendingIntent(com.app.btn2, buildPendingIntent2());