片段不是從SideMenu加載

Question

我想從SideMenu加載一個片段。在我想要在應用程序中加載片段的側面菜單中有一個列表視圖。列表視圖中有3個項目。點擊第0和第3位的代碼工作正常，但不適用於第1位，即i == 1。

我必須爲此做些什麼！

package comm.design.amer.sidemenu_new; 

import android.app.FragmentManager; 
import android.content.Context; 
import android.os.Bundle; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.AppCompatActivity; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.BaseAdapter; 
import android.widget.ImageView; 
import android.widget.ListView; 
import android.widget.RelativeLayout; 
import android.widget.TextView; 
import android.widget.Toast; 
import java.util.ArrayList;<code> 

public class MainActivity extends AppCompatActivity { 

    private ArrayList<listView> Listview = new ArrayList<listView>(); 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.slideview); 
     //Create the ListView Items 
     Listview.add(new listView("page1", "enter", R.drawable.a)); 
     Listview.add(new listView("page2", "enter", R.drawable.b)); 
     Listview.add(new listView("page3", "enter", R.drawable.c)); 
     Listview.add(new listView("page4", "enter", R.drawable.d)); 
     //Call the Adapter 
     mycomstumerAdapter adapter = new mycomstumerAdapter(this, Listview); 
     ListView listview = (ListView) findViewById(R.id.list); 
     listview.setAdapter(adapter); 
//make selection 
     listview.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 
       selectItem(i); 
      } 
     }); 
    } 

    public void selectItem (int i){ 

     if (i==0){ 
      Toast.makeText(getApplicationContext(),"bn",Toast.LENGTH_LONG).show();} 
     else if (i==1) { 
      Fragment1 fragment0 = new Fragment1(); 
      FragmentManager fragmentm = getFragmentManager(); 
      fragmentm.beginTransaction() 
       .add(R.id.linear,fragment0) 
       .commit(); 
     } 
     else if (i==2) 
      finish(); 
    } 

    public class mycomstumerAdapter extends BaseAdapter { 

     Context context; 
     ArrayList<listView> Listview; 

     public mycomstumerAdapter(Context context, ArrayList<listView> Listview) { 
      this.context = context; 
      this.Listview = Listview; 
     } 

     @Override 
     public int getCount() { 
      return Listview.size(); 
     } 

     @Override 
     public Object getItem(int i) { 
      return Listview.get(i); 
     } 

     @Override 
     public long getItemId(int i) { 
      return 0; 
     } 

     @Override 
     public View getView(int i, View view, ViewGroup viewGroup) { 
      View view1; 
      if (view == null) { 
       LayoutInflater inflater = getLayoutInflater(); 
       view1 = inflater.inflate(R.layout.listview, null); 
      } else 
       view1 = view; 

      TextView title = (TextView) view1.findViewById(R.id.textView); 
      TextView detail = (TextView) view1.findViewById(R.id.textView2); 
      ImageView imageView = (ImageView) view1.findViewById(R.id.imageView); 

      title.setText(Listview.get(i).Title); 
      detail.setText(Listview.get(i).Detail); 
      imageView.setImageResource(Listview.get(i).imageView); 

      return view1; 
     } 
    } 

} 

Answer 1

在你的代碼中，我看到你正在使用添加片段而不是替換片段的嘗試。見下面的代碼： -

Fragment1 fragment0 = new Fragment1(); 
    FragmentManager fm = getSupportFragmentManager(); 
    FragmentTransaction fragmentTransaction = fm.beginTransaction(); 
    fragmentTransaction.replace(R.id.linear,fragment0); 
    fragmentTransaction.commit();