从 Android 图库中选择照片然后将其显示在片段中？

Question

我正在开发一个使用片段的 Android 应用程序，并希望用户能够选择图像进行扫描。我有一个片段，允许用户选择他们想要的来源（相机、手绘或画廊）。当用户选择图库时，另一个片段应该显示该图像。我已经知道应该如何将图像放入 ImageView 中，但在 Fragments 中不断出现此错误：

12-10 17:30:26.405: E/AndroidRuntime(6560): FATAL EXCEPTION: main
12-10 17:30:26.405: E/AndroidRuntime(6560): java.lang.RuntimeException: Unable to resume activity {org.nathanmoos.artificialIntelligence.clockreader/org.nathanmoos.artificialIntelligence.clockreader.ChooseSourceActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2241)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2256)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:965)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.os.Looper.loop(Looper.java:130)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.app.ActivityThread.main(ActivityThread.java:3835)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at java.lang.reflect.Method.invokeNative(Native Method)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at java.lang.reflect.Method.invoke(Method.java:507)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at dalvik.system.NativeStart.main(Native Method)
12-10 17:30:26.405: E/AndroidRuntime(6560): Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.view.ViewGroup.addViewInner(ViewGroup.java:1976)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.view.ViewGroup.addView(ViewGroup.java:1871)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.view.ViewGroup.addView(ViewGroup.java:1828)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.view.ViewGroup.addView(ViewGroup.java:1808)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.support.v4.app.NoSaveStateFrameLayout.wrap(NoSaveStateFrameLayout.java:40)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:848)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1053)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:622)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1371)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:499)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1129)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.app.Activity.performStart(Activity.java:3791)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.app.Activity.performRestart(Activity.java:3821)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.app.Activity.performResume(Activity.java:3826)
12-10 17:30:26.405: E/AndroidRuntime(6560):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2231)
12-10 17:30:26.405: E/AndroidRuntime(6560):     ... 10 more

基本上，我的 FragmentTransaction 使用似乎存在问题。这是我的代码：

frag = new GalleryFragment();
frag.setImagePath(imagePath);

FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.fragment_space, frag);
tx.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);

和我的布局文件：

   <FrameLayout 
       android:id="@+id/fragment_space"
       android:layout_width="0dp"
       android:layout_height="match_parent"
       android:layout_weight="65"/>

Answer 1

没关系，我已经弄清楚了这一点。它与以下解决方案相同：

Android Fragment （2.3.3 上的兼容性包）创建“指定的子项已经有父项错误”
和
交换/添加 XML 片段时出错
。