在调用onActivityResult之后，活动被关闭 [英] Activity is closed after onActivityResult is called

问题描述

活动说明:

Activity_A ...读取标签时开始的nfc活动

Activity_A ... nfc activity that gets started when tag is read

Activity_B ...捕获用户签名的活动

Activity_B ... activity to capture user signature

我的问题是这样的: 我有Activity_A，在该活动中，我使用startActivityForResult()方法调用Activity_B.然后，我在Activity_B中进行一些工作并将其关闭.之后，在我的Activity_A中调用onActivityResult()方法.我处理了返回的数据，一切都很好，但是Activity_A不再可见.

Hi, my problem goes like that: I have Activity_A and in that activity I call Activity_B with startActivityForResult() method. I then do some work in Activity_B and close it. After that method onActivityResult() is called in my Activity_A. I handle the returned data and all is great, but Activity_A is no longer visible.

如果我使用后退"按钮关闭Activity_B，则Activity_A仍然可见. (onActivityResult()不会被调用).

If I close Activity_B with back button, then Activity_A is still visible. (onActivityResult() doesn't get called).

当我从Activity_B返回时，我希望我的Activity_A保持活跃并可见.

I would like my Activity_A to stay active and visible when I return from Activity_B.

我已经在运行Kitkat的2台设备(4.4.2和4.4.4)上进行了测试. 由于Activity_A是NFC活动，因此我无法在模拟器上对其进行测试.

I have tested on 2 devices both running Kitkat (4.4.2 and 4.4.4). I can't test it on emulator, since Activity_A is NFC activity.

onActivityResult代码:

onActivityResult code:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Log.d(TAG, "onActivityResult is called");
    switch(requestCode) {
        case SIGNATURE_ACTIVITY:
            if (resultCode == RESULT_OK) {
                Bundle bundle = data.getExtras();
                String signatureFile = data.getStringExtra("SIGNATURE_FILE");
                if(signatureFile !=null ) {
                    this.showToastMessage("Signature captured!");
                    presenter.loadSignatureImage(signatureFile);
                } else {
                    this.showToastMessage("Signature filename not returned!");
                }
            }
            break;
    }
}

推荐答案

确保您没有使用intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
在开始当前活动之前.

Make sure you are not using intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
before starting the current activity.

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