MainActivity如下:
package cc.cu; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.app.Activity; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; /** * Demo描述: * 两个Notification均使用Intent携带数据时.当收到第一个通知时取出其携带的数据没有问题,数据准确; * 但是当收到第二个通知时取出其携带的数据时,居然发现是第一个通知携带的数据. * 当时出现这个问题时,第一感觉问题在于 * NotificationManager.notify(int id, Notification notification) * 方法里的id值相同造成的.但将其修改为不同的值后发现问题依旧. * * 后来发现问题出现于方法: * PendingIntent.getActivity(Context context, int requestCode, Intent intent, int flags) * 的最后一个参数.该值共有四个常量.最好是使用PendingIntent.FLAG_UPDATE_CURRENT,该值的解释如下: * * Flag indicating that if the described PendingIntent already exists, * then keep it but replace its extra data with what is in this new Intent * * 如果PendingIntent已经存在,那么保留它并且只替换它的extra数据 * * 参考资料: * 1 http://blog.csdn.net/lilu_leo/article/details/8491738 * 2 http://developer.android.com/reference/android/app/PendingIntent.html#FLAG_UPDATE_CURRENT * 3 http://blog.csdn.net/vipzjyno1/article/details/25248021 * Thank you very much * 在资料3中对于Notification作了很全面和详细的介绍.有兴趣的可以看看. * * 备注说明: * 测试环境Android2.3.6 * */ public class MainActivity extends Activity { private Context mContext; private Button mFirstButton; private Button mSecondButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); init(); // 取出通知携带的数据 if (this.getIntent().getExtras() != null) { String data = this.getIntent().getExtras().getString("testData"); System.out.println("得到通知传过来的数据:" + data); } } private void init() { mContext = this; mFirstButton = (Button) findViewById(R.id.sendFirstNotificationButton); mFirstButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { sendFirstNotification(); } }); mSecondButton = (Button) findViewById(R.id.sendSecondNotificationButton); mSecondButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { sendSecondNotification(); } }); } // 发送通知 private void sendFirstNotification() { Notification notification = new Notification(); Intent intent = new Intent(mContext, MainActivity.class); intent.putExtra("testData", "来自first的数据"); // PendingIntent pendingIntent=PendingIntent.getActivity(mContext, 0,intent, 0);//error code PendingIntent pendingIntent = PendingIntent.getActivity(mContext, 0,intent, PendingIntent.FLAG_UPDATE_CURRENT); notification.icon = R.drawable.ic_launcher; notification.defaults = Notification.DEFAULT_SOUND; notification.flags |= Notification.FLAG_AUTO_CANCEL; notification.tickerText = "第一个通知"; notification.setLatestEventInfo(mContext, "通知1", "来自第一个按钮触发的通知",pendingIntent); NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); notificationManager.notify(0, notification); } // 发送通知 private void sendSecondNotification() { Notification notification = new Notification(); Intent intent = new Intent(mContext, MainActivity.class); intent.putExtra("testData", "来自second的数据"); // PendingIntent pendingIntent=PendingIntent.getActivity(mContext, 0,intent, 0);//error code PendingIntent pendingIntent = PendingIntent.getActivity(mContext, 0,intent, PendingIntent.FLAG_UPDATE_CURRENT); notification.icon = R.drawable.ic_launcher; notification.defaults = Notification.DEFAULT_SOUND; notification.flags |= Notification.FLAG_AUTO_CANCEL; notification.tickerText = "第二个通知"; notification.setLatestEventInfo(mContext, "通知2", "来自第二个按钮触发的通知",pendingIntent); NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); notificationManager.notify(1, notification); } }
main.xml如下:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <Button android:id="@+id/sendFirstNotificationButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_marginTop="100dip" android:text="发送第一个通知" /> <Button android:id="@+id/sendSecondNotificationButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_marginTop="200dip" android:text="发送第二个通知" /> </RelativeLayout>
Notification(二)——PendingIntent的flag导致数据相同的问题
时间: 2024-10-08 12:09:32