java - 动态设置Fragment时出错

Question

我正在尝试动态设置 fragment 。我需要在 FragmentActivity 中执行此操作。这是我尝试过的。

MainActivity.java

import android.os.Bundle;
import android.app.Activity;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
import android.view.Menu;

public class MainActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Fragment frag = new InputFragment();

        FragmentTransaction ft = getFragmentManager().beginTransaction();   
        ft.replace(R.id.fragment_container, frag);
        ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
        ft.addToBackStack(null);
        ft.commit();
    }

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

}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >



    </FrameLayout>



</RelativeLayout>

InputFragment.java

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

public class InputFragment extends Fragment {

    private Button submit;

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {

        View view = inflater.inflate(R.layout.input, container,false);


        submit = (Button)view.findViewById(R.id.input_submit_button);
        submit.setOnClickListener(new SubmitButtonAction());


        return view;

    }

    private class SubmitButtonAction implements OnClickListener
    {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Fragment frag = new OutputFragment();

            FragmentTransaction ft = getFragmentManager().beginTransaction();   
            ft.replace(R.id.fragment_container, frag);
            ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
            ft.addToBackStack(null);
            ft.commit();
        }

    }

}

出现编译错误。在这里。

Type mismatch: cannot convert from android.app.FragmentTransaction to android.support.v4.app.FragmentTransaction

此错误来自 MainActivity.java 的 FragmentTransaction ft = getFragmentManager().beginTransaction();

我尝试了 Eclipse 建议的修复，但它没有给我任何帮助。当我使用 exlipse 建议修复错误时，它给出了另一个错误。当我使用 Eclipse 建议修复它(单击 Eclipse 建议)时，它会返回到之前的错误。

我在这里做什么？

Answer 1

尝试使用getSupportFragmentManager()而不是getFragmentManager()