Question

我的应用中有两个标签的tabHost活动。我从标签1开始。如果我按下Android的后退按钮，我可以转到前一个活动。当我转到第二个标签并按下后退按钮时，我会回到之前的活动中。

如果我再次切换标签（所以再次在第一个标签页上），我收到以下错误：

01-04 11:37:32.639: E/AndroidRuntime(2056): FATAL EXCEPTION: main
01-04 11:37:32.639: E/AndroidRuntime(2056): Process: com.example.damir.klicker, PID: 2056
01-04 11:37:32.639: E/AndroidRuntime(2056): java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1365)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.support.v4.app.FragmentManagerImpl.popBackStackImmediate(FragmentManager.java:500)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.support.v4.app.FragmentActivity.onBackPressed(FragmentActivity.java:176)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.app.Activity.onKeyUp(Activity.java:2201)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.KeyEvent.dispatch(KeyEvent.java:2664)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.app.Activity.dispatchKeyEvent(Activity.java:2431)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1962)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.widget.TabHost.dispatchKeyEvent(TabHost.java:324)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:2035)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1505)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.app.Activity.dispatchKeyEvent(Activity.java:2426)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1962)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3921)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3895)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3452)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3502)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3471)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3578)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3479)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3635)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3452)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3502)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3471)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3479)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3452)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3502)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3471)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3611)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3777)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:2012)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1706)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1697)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:1989)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.os.MessageQueue.nativePollOnce(Native Method)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.os.MessageQueue.next(MessageQueue.java:138)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.os.Looper.loop(Looper.java:123)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at android.app.ActivityThread.main(ActivityThread.java:5086)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at java.lang.reflect.Method.invokeNative(Native Method)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at java.lang.reflect.Method.invoke(Method.java:515)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
01-04 11:37:32.639: E/AndroidRuntime(2056):     at dalvik.system.NativeStart.main(Native Method)

当我再次转到标签2时也会发生这种情况。所以基本上在我进行第二次切换后，我无法返回。

任何人都知道如何解决这个问题？

问题解决了！这是我的最终代码：

public class QuestionsResultTabHost extends ActionBarActivity {

    LocalActivityManager mLocalActivityManager;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.fragment_questions_results);

        TabHost tabs = (TabHost) findViewById(R.id.tabHost);
        mLocalActivityManager = new LocalActivityManager(this, false);
        mLocalActivityManager.dispatchCreate(savedInstanceState);
        tabs.setup(mLocalActivityManager);

        Intent questionIntent = new Intent(this, QuestionActivity.class);

        Intent currentIntent = getIntent();
        Bundle extras = currentIntent.getExtras();
        if (extras != null) {
            questionIntent.putExtra("moduleId", extras.getString("moduleId"));
        }
        tabs.addTab(tabs.newTabSpec("questions").setIndicator("Fragen").setContent(questionIntent));

        Intent resultIntent = new Intent(this, ResultActivity.class);
        if (extras != null) {
            resultIntent.putExtra("moduleId", extras.getString("moduleId"));
        }
        tabs.addTab(tabs.newTabSpec("result").setIndicator("Ergebnis").setContent(resultIntent));

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        int id = item.getItemId();


        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
    }

    @Override
    protected void onResume ()
    {
        mLocalActivityManager.dispatchResume();
        super.onResume ();
    }

    @Override
    protected void onPause ()
    {
        mLocalActivityManager.dispatchPause(isFinishing());
        super.onPause ();
    }

    @Override
    protected void onStop ()
    {
        mLocalActivityManager.dispatchStop ();
        super.onStop ();
    }

    @Override
    protected void onSaveInstanceState (Bundle outState)
    {
        mLocalActivityManager.saveInstanceState ();

    }

}

Answer 1

@Override
protected void onResume ()
{
    mLocalActivityManager.dispatchResume();
    super.onResume ();
}

@Override
protected void onPause ()
{
    mLocalActivityManager.dispatchPause(isFinishing());
    super.onPause ();
}

@Override
protected void onStop ()
{
    mLocalActivityManager.dispatchStop ();
    super.onStop ();
}

@Override
protected void onSaveInstanceState (Bundle outState)
{
    mLocalActivityManager.saveInstanceState ();

}

我将此添加到我的tabHost活动中，它完成了工作。

返回后，Android tabHost崩溃

1 个答案: