Question

是的，我已经阅读了关于非常相同问题的无数问题。

我的代码很简单：我只是在showDialog(int id)上使用onCreate，然后我旋转设备。 代码只是（测试用例） ，这足以导致问题。我的理解是showDialog的方法会处理这个问题......对话框会消失，然后在更改后稍后调用onCreate并再次清楚地显示对话框。但不是。 这种推理出了什么问题？

我（我想）理解the cause，但我不知道如何解决这个问题。即使是iosched应用程序在实现EULA窗口时也存在同样的问题（在eula对话框上更改方向并且您会收到泄漏）。我已经阅读了关于关闭onPause的对话框的内容，但是1）我没有显示它的风险，并且2）跟踪对话似乎太多了。必须有一个更强大的方法。

那么......处理这个问题需要哪些更干净的代码？

谢谢。

记录错误输出：

01-30 00:27:18.615: E/WindowManager(20316): Activity com.test.PreSetupActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@418e0c28 that was originally added here
01-30 00:27:18.615: E/WindowManager(20316): android.view.WindowLeaked: Activity com.test.PreSetupActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@418e0c28 that was originally added here
01-30 00:27:18.615: E/WindowManager(20316):     at android.view.ViewRootImpl.<init>(ViewRootImpl.java:343)
01-30 00:27:18.615: E/WindowManager(20316):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:245)
01-30 00:27:18.615: E/WindowManager(20316):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:193)
01-30 00:27:18.615: E/WindowManager(20316):     at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:118)
01-30 00:27:18.615: E/WindowManager(20316):     at android.view.Window$LocalWindowManager.addView(Window.java:537)
01-30 00:27:18.615: E/WindowManager(20316):     at android.app.Dialog.show(Dialog.java:274)
01-30 00:27:18.615: E/WindowManager(20316):     at com.test.PreSetupActivity.onCreate(PreSetupActivity.java:88)
01-30 00:27:18.615: E/WindowManager(20316):     at android.app.Activity.performCreate(Activity.java:4465)
01-30 00:27:18.615: E/WindowManager(20316):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
01-30 00:27:18.615: E/WindowManager(20316):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
01-30 00:27:18.615: E/WindowManager(20316):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
01-30 00:27:18.615: E/WindowManager(20316):     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3347)
01-30 00:27:18.615: E/WindowManager(20316):     at android.app.ActivityThread.access$700(ActivityThread.java:122)
01-30 00:27:18.615: E/WindowManager(20316):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1150)
01-30 00:27:18.615: E/WindowManager(20316):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-30 00:27:18.615: E/WindowManager(20316):     at android.os.Looper.loop(Looper.java:137)
01-30 00:27:18.615: E/WindowManager(20316):     at android.app.ActivityThread.main(ActivityThread.java:4340)
01-30 00:27:18.615: E/WindowManager(20316):     at java.lang.reflect.Method.invokeNative(Native Method)
01-30 00:27:18.615: E/WindowManager(20316):     at java.lang.reflect.Method.invoke(Method.java:511)
01-30 00:27:18.615: E/WindowManager(20316):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-30 00:27:18.615: E/WindowManager(20316):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-30 00:27:18.615: E/WindowManager(20316):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

有一个内部类充当你的stateholder并且在那里有一个布尔字段，表示你的对话框是否显示。使用onRetainNonConfigurationInstance跟踪方向更改，并在onResume上重新显示对话框

这是一些代码+伪代码：

public class ProfileActivity extends Activity {
  private StateHolder mStateHolder;
  private Dialog dialog;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Object retained = getLastNonConfigurationInstance();
    if (retained != null && retained instanceof StateHolder) {
      mStateHolder = (StateHolder) retained;
    } else {
      mStateHolder = new StateHolder();
    }
  }

  @Override
  public Object onRetainNonConfigurationInstance() {
    return mStateHolder;
  }

  @Override
  public void onPause() {
    super.onPause();
    if(dialog != null && dialog.isShowing()) {
      dialog.dismiss();
    }
  }

  @Override
  public void onResume() {
    if(mStateHolder.mIsShowingDialog) {
      dialog.show();
    }
  }

  private void showDialog() {
    mStateHolder.mIsShowingDialog = true;
    dialog.show();
  }

  private static class StateHolder {
    boolean mIsShowingDialog;
    public StateHolder() {}
  }

}

活动已泄露窗口/对话框（再次！）

1 个答案: