Question

我是android编程的新手。所以请原谅我，如果我问无意义的问题。在关注如何创建ListFragments的几个教程后，编写的程序编译没有错误，但拒绝安装在AVD上。这是它给出的错误

[2014-05-08 07:44:46 - TabsWithSwipe] Uploading TabsWithSwipe.apk onto device 'emulator-      5554'
[2014-05-08 07:44:46 - TabsWithSwipe] Installing TabsWithSwipe.apk...
[2014-05-08 07:48:59 - TabsWithSwipe] Failed to install TabsWithSwipe.apk on device 'emulator-5554!
[2014-05-08 07:48:59 - TabsWithSwipe] (null)
[2014-05-08 07:49:00 - TabsWithSwipe] Launch canceled!

以下是个别代码，如果它有助于详细说明问题。 MainActivity.java

package com.example.tabswithswipe;

import android.annotation.SuppressLint;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;

import com.example.tabswithswipe.adapter.TabsPagerAdapter;



@SuppressLint("NewApi")
public class MainActivity extends FragmentActivity  implements ActionBar.TabListener{
    private ViewPager viewPager;
    private TabsPagerAdapter mAdapter;
    private ActionBar actionBar;
    //tab titles

    private String[] tabs = {"Top Rated","Games","Movies"};


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        viewPager = (ViewPager)findViewById(R.id.pager);
        actionBar = getActionBar();
        mAdapter = new TabsPagerAdapter(getSupportFragmentManager());

        viewPager.setAdapter(mAdapter);
        actionBar.setHomeButtonEnabled(false);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        //ADding TAbs
        for (String tab_name : tabs)
        {
            actionBar.addTab(actionBar.newTab().setText(tab_name)
                         .setTabListener(this));
    }
    //on swipping the viewpager make respective tab selected
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            public void onPageSelected(int position)
            {
                //on changing the page
                //make respected tab selected
                actionBar.setSelectedNavigationItem(position);
            }
            public void onPageScrolled(int arg0, float arg1, int arg2)
            {

            }
            public void onPageScrollStateChanged(int arg0)
            {

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

    }

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub
        viewPager.setCurrentItem(tab.getPosition());
    }

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

    }

}

activity_main.xml中

<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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <android.support.v4.view.ViewPager 
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        </android.support.v4.view.ViewPager>

</RelativeLayout>

这是TabsPagerAdapter的类

package com.example.tabswithswipe.adapter;

import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.ListFragment;

import com.example.tabswithswipe.GamesFragment;
import com.example.tabswithswipe.MoviesFragment;
import com.example.tabswithswipe.TopRatedFragment;


public class TabsPagerAdapter  extends FragmentPagerAdapter{
    public TabsPagerAdapter(FragmentManager fm){
        super(fm);
    }
    public ListFragment getItem(int index) 
    {
        switch(index)
        {
        case 0:
            //Top Rated fragment activity
            return new TopRatedFragment();

        case 1:
            //Games fragment activity
            return new GamesFragment();

        case 2:
            //Movies fragment activity
            return new MoviesFragment();
        }
        return null;
    }

    public int getCount()
    {
        //get item count,equal to number of tabs
        return 3;
    }


}

这是一个名为GameFragments的自定义ListFragments

package com.example.tabswithswipe;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.support.v4.app.ListFragment;

@SuppressLint("NewApi")
public class GamesFragment extends ListFragment {
    String[] list_items;

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        View rootView = inflater.inflate(R.layout.fragment_games, container, false);
        list_items = getResources().getStringArray(R.array.my_data_list);
        setListAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1,list_items));

        return rootView;
    }



}

以下是此gameFragment的xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ff8400"
    android:orientation="vertical" >

    <TextView android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"

        android:textSize="20dp"
        android:layout_centerInParent ="true"/>

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" >
    </ListView>

</RelativeLayout>

其他两个海关清单碎片类和xml是相同的。我将不胜感激任何帮助

Answer 1

您的模拟器看起来不支持您使用的API，因为模拟器上的Android版本太低了。

尝试使用Android版本的模拟器＆gt; 4.0

ListFragment选项卡程序编译没有任何错误但拒绝安装

1 个答案: