startactivityforresult

一，基本情况 不说废话，先直接上图，大致情况就是，在一则New Message中添加一些附件（图片，视频，声音等）和信息一起发送，如下图； 二，基本思路 其实，这就类似于我们的拍照上传，是采用一样的处理方法， 这里选择临时拍一张照片作为一起发送的附件，即上图中的Capture Picture。主要步骤： 1）点击Capture Picture时，会启动系统Camera应用程序来拍照；主要使用startActivityForResult (Intent intent, int requestCode)方法来启动Camera程序； 2）拍摄照片；这里就是用Camera进行拍照，这里不做介绍； 3）保存照片，并将照片数据返回给Message应用；主要用到一个setResult(int resultCode, Intent intent)方法，返回到原调用程序，关闭Camera; 4）在Message应用中处理返回的数据；重写onActivityResult(int requestCode, int resultCode, Intent data)方法来处理返回的数据； 三，具体流程 首先，我们已经启动Message-->New Message-->Attachment，在Message主活动ComposeMessageActivity中有一个addAttachment(

I'm wondering if I am understanding the concepts of requestCode and resultCode properly? Basically, I have an arbitrary integer (the requestCode) associated with an activity. For example, in the Notepad tutorial , we have private static final int ACTIVITY_CREATE=0; private static final int ACTIVITY_EDIT=1; We then use startActivityforResult(intent, requestCode) to start an activity, e.g. the "create note" activity. We do something in that activity and return a resultCode. In the parent activity we detect the resultCode with onActivityResult(requestCode, resultCode, intent). We can then use the

I got a situation like this: Activity A --> B --> C --> D, when D finished, I have to refresh ActivityA to display what I input in ActivityB , ActivityC and ActivityD.Here is my code: ActivityA @OnClick(R.id.btn_one) public void toActivityB(){ Intent intent = new Intent(); intent.setClass(this, ActivityB.class); startActivityForResult(intent, 1); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == 1 && resultCode == RESULT_OK){ String b = data.getStringExtra("b"); String c = data

Is it possible to know if some activity has been called for result, using startActivityForResult() or if was only started using startActivity() ? I need to control this, if its called for result the behaviour will be different. lopisan When your activity was started just by startActivity() a getCallingActivity() method in target activity will return null . When it was called by startActivityForResult() it will return name of calling activity. See Docs for getCallingActivity() : Return the name of the activity that invoked this activity. This is who the data in setResult() will be sent to. You

I have four activities, say A, B, C and D. My situation is A will start the activity B by startActivityForResult. startActivityForResult(new Intent(this,B.class),ONE); In other situation i will B with other situation. like startActivityForResult(new Intent(this,B.class),TWO); In B, I need to call C or D depending on requestCode. I.e if ONE need to start C else D. So I need to know how to check the requestCode in the child Activity (B here). In other words, I want to get the request code that Activity B was started with. You can pass request code by put extra. intent.putExtra("requestCode",