Question

我正在使用标签菜单。因此，我创建了Fragment页和适配器。当我添加片段页以显示时说“无法分配给android.app.activity”。因此我切换到{{ 1}}从FragmentActivity，但这次我得到了新的错误 “不能被转换为Fragment”。

我该怎么办。我真的很累。我还清理了项目和缓存，但是没有用。

Fragment

Testtab1与tab2相同的代码，只是名称不同。

@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_tabdene, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */

    /**
     * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
     * one of the sections/tabs/pages.
     */
    public class SectionsPagerAdapter extends FragmentPagerAdapter {

        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            switch (position) {
                case 0:
                    testtab1 tab1 = new testtab1();
                    return tab1;
                case 1:
                    testtab2  tab2 = new testtab2();
                    return tab2;
                default:
                    return null;
            }
        }

        @Override
        public int getCount() {
            // Show 3 total pages.
            return 2;
        }

        @Override
        public CharSequence getPageTitle(int position){
            switch (position) {
                case 0:
                    return "FREE";
                case 1:
                    return "PAID";
            }
            return null;
        }
    }
}

清单

import android.support.v4.app.FragmentActivity;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class testtab1 extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View pView = inflater.inflate(R.layout.activity_testtab1, container ,false);
        return pView;
    }



}

<?xml version="1.0" encoding="utf-8"?>

无法分配给android.app.activity片段

0 个答案: