无法从onListItemClick

Question

我试图从列表视图的OnItemClickListener事件中启动一个片段，但它没有显示任何内容。要检查OnItemClickListener是否正常运行，我已经包含了一个Toast来显示一些文本及其工作正常。 这是我的代码

以下是主要活动的ItemClickListener的代码

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
        public void onItemClick(AdapterView<?> parent, View view, int position, long id){

            Fragment fragment = new Friendtilefragment();
            FragmentTransaction transaction = getFragmentManager().beginTransaction();
            transaction.replace(R.id.friendtilefragment, fragment);
            transaction.addToBackStack(null);
            transaction.commit();

            Toast.makeText(getApplicationContext(), "An item of the ListView is clicked.", Toast.LENGTH_LONG).show();
        }
    });

Friendtilefragment的代码

package com.example.xxxxxxxx.socialoid;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Friendtilefragment extends Fragment {

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

mainactivity_layout.xml

<android.support.v4.widget.SwipeRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="@color/list_divider"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_row_selector" />

<fragment
    android:id="@+id/friendtilefragment"
    android:name="com.example.xxxxxxxx.socialoid.Friendtilefragment"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    />
</android.support.v4.widget.SwipeRefreshLayout>

friendtilefragment_layout.xml

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_gravity="center"
android:layout_width="match_parent"
android:layout_height="match_parent">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="This is textview"/>

</LinearLayout>

Answer 1

您必须在MainActivity中创建FrameLayout并将android:id="@+id/friendtilefragment"移至FrameLayout。

mian_activity中的示例

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/friendtilefragment">

<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">

.....

之间，将Fragment fragment = new Friendtilefragment();更改为Friendtilefragment fragment = new Friendtilefragment();

检查this

Answer 2

替换

Fragment fragment = new Friendtilefragment();

用这个

Friendtilefragment fragment = new Friendtilefragment();

Answer 3

试试这个.. 用您的mainactivity_layout.xml

替换代码

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

<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content" 
android:divider="@color/list_divider"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_row_selector" />    
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>

我希望这有效..