Intent 概述 一个 Android 程序主要是由 Activity、Service 和 BroadcastReceiver 三种组件组成,这三种组件是独立的,它们之间可以互相调用、协调工作,最终组成一个真正的 Android 程序。这些组件之间的通讯主要由Intent协助完成。Intent负责对应用中一次操作的Action(动作)、Action涉及的Data(数据)
Activity一共有以下四种launchMode: 1.standard 2.singleTop 3.singleTask 4.singleInstance 作用概述:规定是否新建activity,是否公用task(task:应用启动时,会创建一个对应的task。task主要负责对activity进行管理。) 使用方法:我们可以在AndroidManifest.xml配置<activity...在...
首先我们定义了MainActivity的静态实例Instance,并在OnCreate事件中赋值 然后添加重写方法OnActivityResult,通过requestCode == PickImageId判断是从相册选取多个文件的业务(我们关注的业务),通过intent.ClipData获取数据,然后遍历这些数据依次通过GetItemAt(i).Uri获取所有的文件Uri,然后再通过我们封装的GetImageDicFromUris方法...
Main Activity packagecom.example.alert_broadcast_receiver;importandroid.os.Bundle;importandroid.app.Activity;importandroid.app.AlarmManager;importandroid.app.PendingIntent;importandroid.content.Intent;importandroid.view.Menu;importandroid.view.View;importandroid.widget.Button;importandroid.widget.EditText;importan...
// specified by the app in the extra (10 in this example).final int maxNumPhotosAndVideos = 10;Intent intent = new Intent(MediaStore.ACTION_PICK_IMAGES);intent.putExtra(MediaStore.EXTRA_PICK_IMAGES_MAX, maxNumPhotosAndVideos);startActivityForResult(intent, PHOTO_PICKE...
3、通过startActivityForResult打开新的Activity(打开相册),并通过重写onActivityResult获取选取照片的返回数据 4、从返回的Intent中拿到文件的Uri从而获取文件内容 注意:在一个Activity中,可能会使用startActivityForResult()方法打开多个不同的Activity处理不同的业务 ,这时可以在onActivityResult中通过requestCode区分不同业务。
2.2Activity Manager Service The system server in Android is a privileged process running in user space. Apps communicate with it via binder messages and intents. The system server itself can be further divided into a collection of services, each of which is designed to manage a particular functi...
WithFirstActivityTimeUtc Incident.UpdateStages.WithLabels Incident.UpdateStages.WithLastActivityTimeUtc Incident.UpdateStages.WithOwner Incident.UpdateStages.WithProviderIncidentId Incident.UpdateStages.WithProviderName Incident.UpdateStages.WithSeverity Incident.UpdateStages.WithStatus Incident.UpdateStages.WithTeam...
Looking into this, it appears I should be able to add LaunchMode = LaunchMode.SingleTop to my MainActivity attributes, and then override the OnNewIntent method of my MainActivity.I'm setting the PendingIntentFlags.UpdateCurrent flag when creating the pending intent for the Notification (which it...
If your configuration structure changes, you only have to change the wrappers, rather than locate and update all the places in your code where configuration is accessed.Your program should call the config function, usually with an argument specifying the configuration profile. It then returned value...