如何解决Android上的替换方法错误？

Question

我正在使用操作栏选项卡创建Android应用程序所有代码如果完美但我有片段的替换方法的问题.如何解决这个错误？

系统显示:

FragmentTransaction类型中的方法replace(int,Fragment)不适用于参数(int,Fragment)

StartActivity.java

package com.devlebactionbartab;

import android.net.wifi.p2p.WifiP2pManager.ActionListener;
import android.os.Bundle;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.drm.DrmStore.Action;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;

public class StartActivity extends FragmentActivity {

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


        ActionBar actionbar  = getActionBar();
        actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        actionbar.setTitle("Tabbed Layout");


        ActionBar.Tab Frag1Tab = actionbar.newTab().setText("Fragment1");
        ActionBar.Tab Frag2Tab = actionbar.newTab().setText("Fragment2");
        ActionBar.Tab Frag3Tab = actionbar.newTab().setText("Fragment3");
        ActionBar.Tab Frag4Tab = actionbar.newTab().setText("Fragment4");

        Fragment fragment1 = new Fragment_1();
        Fragment fragment2 = new Fragment_2();
        Fragment fragment3 = new Fragment_3();
        Fragment fragment4 = new Fragment_4();

        Frag1Tab.setTabListener(new MyTabsListener(fragment1));
        Frag2Tab.setTabListener(new MyTabsListener(fragment2));
        Frag3Tab.setTabListener(new MyTabsListener(fragment3));
        Frag4Tab.setTabListener(new MyTabsListener(fragment4));

        actionbar.addTab(Frag1Tab);
        actionbar.addTab(Frag2Tab);
        actionbar.addTab(Frag3Tab);
        actionbar.addTab(Frag4Tab);
    }


class MyTabsListener implements ActionBar.TabListener{

    public Fragment fragment;

    //constractor
    public MyTabsListener (Fragment fragment){

        this.fragment = fragment;
    }

    @Override
    public void onTabReselected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub
        ft.replace(R.id.fragment_container, fragment);
    }

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub

    }
}

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

Answer 1

 android.app.FragmentTransaction.replace(int id,android.app.Fragment fragment);

您的方法正在寻找来自 android.app.Fragment 的 Fragment，您已导入 android.support.v4.app.Fragment。我的建议是您也从 v4 支持导入 FragmentTransaction。

脚步：

删除：import android.app.FragmentTransaction;

添加：import android.support.v4.app.FragmentTransaction;

转到 eclipse->project->clean -> clean all。

v4 支持 FragmentTransaction