java - 如何让 videoView 在 fragment 内播放？

Question

我对 fragment 非常陌生，我正在尝试将 videoView 加载到 fragment 中。我的布局文件布局正确(因为我可以在图像之间滑动)，但我不确定如何将 videoView 加载到 fragment 中。我的 Activity 代码如下:

package com.example.PLS;

import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.VideoView;

public class CustomPagerAdapter extends PagerAdapter
{
public Object instantiateItem(View collection, int position) {
    LayoutInflater inflater = (LayoutInflater) collection.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    int resId = 0;
    switch (position) {
        case 0: {
            resId = R.layout.page1;
            break;
        }
        case 1: {
            resId = R.layout.page2;
            break;
        }
        case 2: {
            resId = R.layout.page3;
            break;
        }
    }
    View view = inflater.inflate(resId, null);
    ((ViewPager) collection).addView(view, 0);
    return view;
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
    ((ViewPager) arg0).removeView((View) arg2);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
    return arg0 == ((View) arg1);
}
@Override
public Parcelable saveState() {
    return null;
}
@Override
public int getCount() {
    return 3;
}
}

package com.example.PLS;

import android.app.Fragment;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.widget.VideoView;

public class MyActivity extends FragmentActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    // Create and set adapter
    CustomPagerAdapter adapter = new CustomPagerAdapter();
    ViewPager myPager = (ViewPager) findViewById(R.id.customviewpager);
    myPager.setAdapter(adapter);
    myPager.setCurrentItem(0);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}
}

我不确定在哪里或如何放置告诉 videoView 在 page1 中播放视频的代码。我应该把它放在哪里以及它看起来如何？

Answer 1

有点题外话:您确定您使用的是 fragment 而不仅仅是 View 吗？据我所知，您可以添加和删除 View 。

或者你在布局文件中做了什么？如果可以的话，您能提供xml布局资源吗？

参见can i use view pager with views (not with fragments)

对于您的问题:调用 addView 后，您可以执行以下操作(或将其添加到按钮监听器):

    String videoUri = getVideoUriForPosition(position);
    // TODO check if videoUri is not null or something

    mPlayerView = (VideoView) mView.findViewById(R.id.video_player);
                mPlayerView.requestFocus();
    if(mPlayerView == null) {
       Log.e(TAG, "Video view null");
    } else {
       mPlayerView.setVideoURI(Uri.parse(videoUri));
       mPlayerView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

             public void onPrepared(MediaPlayer mp) {
                  mPlayerView.start();                  
       });
    }