将数据从 child activity onActivityResult() 发送到 parent activity onActivityResult()

Question

我有一个包含 2 个 Activity 的应用程序。 Activity A (parent) 启动 Activity B (child) 通过调用：

startActivityForResult(intentB,B_Request);

Activity B是条码扫描仪。（我使用这个库：com.journeyapps:zxing-android-embedded:3.2.0@aar）。在此 activity 中，我必须覆盖 onActivityResult() 方法才能获取扫描代码。之后我想将 'code' 中存储的数据发送回 parent (Activity A) onActivityResult()。我是这样做的：

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
        String code = null;

        if(result != null){
            if(result.getContents() == null){
                return;
            }
            else {
                code = result.getContents();
            }
        }
        else {
            super.onActivityResult(requestCode, resultCode, data);
        }

        Intent intent = new Intent(getApplicationContext(),A.class);
        intent.putExtra("scannedCode", code);
        setResult(RESULT_OK, intent);
        finish();
}

parent onActivityResult() 看起来像这样：

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode == CAMERA_REQUEST){
            if(resultCode == RESULT_OK){

                String scannedCode = data.getStringExtra("scannedCode");
                toastMessage("Scanned code: " + scannedCode);
            }
        }
    }

我得到以下异常，我没有看到 Activity A，而是被重定向到 Activitie 的 A parent。

E/ActivityManager: Failed to schedule configuration change
    android.os.DeadObjectException
        at android.os.BinderProxy.transactNative(Native Method)
        at android.os.BinderProxy.transact(Binder.java:1177)
        at android.app.IApplicationThread$Stub$Proxy.scheduleTransaction(IApplicationThread.java:1815)
        at android.app.servertransaction.ClientTransaction.schedule(ClientTransaction.java:129)
        at com.android.server.am.ClientLifecycleManager.scheduleTransaction(ClientLifecycleManager.java:47)
        at com.android.server.am.ClientLifecycleManager.scheduleTransaction(ClientLifecycleManager.java:100)
        at com.android.server.am.ActivityManagerService.updateGlobalConfigurationLocked(ActivityManagerService.java:24782)
        at com.android.server.am.ActivityManagerService.updateDisplayOverrideConfigurationLocked(ActivityManagerService.java:24902)
        at com.android.server.am.ActivityManagerService.updateDisplayOverrideConfigurationLocked(ActivityManagerService.java:24879)
        at com.android.server.am.ActivityStackSupervisor.ensureVisibilityAndConfig(ActivityStackSupervisor.java:1671)
        at com.android.server.am.ActivityStackSupervisor.realStartActivityLocked(ActivityStackSupervisor.java:1420)
        at com.android.server.am.ActivityStackSupervisor.startSpecificActivityLocked(ActivityStackSupervisor.java:1709)
        at com.android.server.am.ActivityStack.resumeTopActivityInnerLocked(ActivityStack.java:3043)
        at com.android.server.am.ActivityStack.resumeTopActivityUncheckedLocked(ActivityStack.java:2488)
        at com.android.server.am.ActivityStackSupervisor.resumeFocusedStackTopActivityLocked(ActivityStackSupervisor.java:2234)
        at com.android.server.am.ActivityStack.completePauseLocked(ActivityStack.java:1745)
        at com.android.server.am.ActivityStack.activityPausedLocked(ActivityStack.java:1669)
        at com.android.server.am.ActivityManagerService.activityPaused(ActivityManagerService.java:9657)
        at android.app.IActivityManager$Stub.onTransact(IActivityManager.java:224)
        at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:3820)
        at android.os.Binder.execTransact(Binder.java:752)

p.s。我获得 Activity B 中的代码还不够，我需要 Activity A 中的代码。

你能告诉我我做错了什么吗？

谢谢！

Answer 1

只需输入 new intent() 而不是

new Intent(getApplicationContext(),A.class)

在你的childactivity

将数据从 child activity onActivityResult() 发送到 parent activity onActivityResult()

Sending data from a child activity onActivityResult() to parent activity onActivityResult()

android

onactivityresult