编写:徐建祥(netpirate@gmail.com)
日期:2010/11/22
址:http://www.anymobile.org
QQ的状态栏通知机制:当所有QQ的UI Activity切换到后台后,添加状态通知;切换回来后,删除该状态通知。
飞信的状态栏通知方式:运行软件后,图标一直显示在状态栏的通知栏中;显示退出软件则删除该状态通知。
似乎QQ的更有点技术含量,多个程序切换到后台的处理而已;以飞信的模式,做个类似的测试,案例如下:
程序路径:org.anymobile.im
程序入口:org.anymobile.im.LoginActivity(Action:android.intent.action.MAIN;Category:android.intent.category.LAUNCHER)
主界面程序:org.anymobile.im.MainActivity
测试程序流程:未登录的情况下,或者第一次运行会打开LoginActivity程序;登陆后,一直停留在主界面MainActivity。
所以,通过Notification,需可以回到im项目的上一个界面程序,LoginActivity / MainActivity,这里就要参考Launcher应用的相关实现,Intent的flag设置。
测试代码,新建一个android项目,TestNotification,入口程序:TestActivity,代码如下:
packageorg.anymobile.test;
importandroid.app.Activity;
importandroid.content.ComponentName;
importandroid.content.Intent;
importandroid.graphics.LightingColorFilter;
importandroid.os.Bundle;
importandroid.view.Menu;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
publicclassTestActivityextendsActivity
{
privatestaticfinalintADD_ID =0;
privatestaticfinalintDEL_ID =1;
/** Called when the activity is first created. */
@Override
publicvoidonCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button = (Button) this.findViewById(R.id.btn_menu);
button.setOnClickListener(newOnClickListener()
{
publicvoidonClick(View v)
{
// TestActivity.this.openOptionsMenu();
String packName = “org.anymobile.im”;
String className = packName + “.LoginActivity”;
Intent intent = newIntent();
ComponentName componentName = newComponentName(packName, className);
intent.setComponent(componentName);
intent.setAction(“android.intent.action.MAIN”);
intent.addCategory(“android.intent.category.LAUNCHER”);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
TestActivity.this.startActivity(intent);
}
});
// button.getBackground().setColorFilter(0xFFFF0000, PorterDuff.Mode.MULTIPLY);
button.getBackground().setColorFilter(newLightingColorFilter(0xFFFFFFFF,0xFFAA0000));
}
@Override
publicbooleanonCreateOptionsMenu(Menu menu)
{
menu.add(0, ADD_ID,0,”ADD”);
menu.add(0, DEL_ID,0,”DEL”);
returnsuper.onCreateOptionsMenu(menu);
}
}
OK,开始测试状态栏的通知功能:
1、LoginActivity.onCreate() 调用showNotification()方法,创建一个通知图标;
/**
* The notification is the icon and associated expanded entry in the
* status bar.
*/
protectedvoidshowNotification()
{
CharSequence from = “IM”;
CharSequence message = “IM start up”;
Intent intent = newIntent();
ComponentName componentName = newComponentName(“com.longcheer.imm”,
“com.longcheer.imm.activitys.LoginActivity”);
intent.setComponent(componentName);
intent.setAction(“android.intent.action.MAIN”);
intent.addCategory(“android.intent.category.LAUNCHER”);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
// The PendingIntent to launch our activity if the user selects this notification
PendingIntent contentIntent = PendingIntent.getActivity(this,0, intent,0);
// construct the Notification object.
Notification notif = newNotification(R.drawable.icon,”IMM Still run background!”,
System.currentTimeMillis());
notif.setLatestEventInfo(this, from, message, contentIntent);
// look up the notification manager service
NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
nm.notify(R.string.app_name, notif);
}
2、在LoginActivity / MainAcitivity的退出操作中cancel该通知。
privatevoiddoExit()
{
this.finish();
NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
nm.cancel(R.string.app_name);
}
测试OK!!
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