我尝试开发一个应用程序从服务器检索视频并在 viewpager 内的 videoview 上播放，原始文件夹中的视频工作正常，但有两个问题：
- 1：部分视频无法播放。或黑色活动显示。
- 2：页面滚动时视频不停止。
那么如何使用 URL 而不是 `
android.resource://mypackagename/video1.mp4
以及当 PageIsChanged 时如何暂停/停止。任何教程或任何点击我都会感激不尽。
这是我的代码源代码 http://topappstopgames.com/projects/ViewPagerVideoFromServer.zip
ViewPagerAdapter.java
import android.content.Context;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnPreparedListener;
import android.net.Uri;
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.ImageView;
import android.widget.LinearLayout;
import android.widget.MediaController;
import android.widget.TextView;
import android.widget.VideoView;
public class ViewPagerAdapter extends PagerAdapter {
Context context;
String[] rank;
String[] country;
String[] population;
int[] flag;
LayoutInflater inflater;
static int[] arrayvid;
private VideoView mVideoView;
public ViewPagerAdapter(Context context, String[] rank, String[] country,
String[] population, int[] flag, int[] arrayvid) {
this.context = context;
this.rank = rank;
this.country = country;
this.population = population;
this.flag = flag;
this.arrayvid = arrayvid;
}
@Override
public int getCount() {
return rank.length;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((LinearLayout) object);
}
@Override
public Object instantiateItem(ViewGroup container, final int position) {
// Declare Variables
TextView txtrank;
TextView txtcountry;
TextView txtpopulation;
ImageView imgflag;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.viewpager_item, container,
false);
// Locate the TextViews in viewpager_item.xml
txtrank = (TextView) itemView.findViewById(R.id.rank);
txtcountry = (TextView) itemView.findViewById(R.id.country);
txtpopulation = (TextView) itemView.findViewById(R.id.population);
imgflag = (ImageView) itemView.findViewById(R.id.flag);
mVideoView = (VideoView) itemView.findViewById(R.id.VVExe);
txtrank.setText(rank[position]);
txtcountry.setText(country[position]);
txtpopulation.setText(population[position]);
imgflag.setImageResource(flag[position]);
mVideoView.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
mp.setLooping(true);
}
});
MediaController mediaController = new MediaController(context, false);
mediaController.setAnchorView(mVideoView);
mVideoView.setMediaController(mediaController);
((ViewPager) container).addView(itemView);
return itemView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
// Remove viewpager_item.xml from ViewPager
((ViewPager) container).removeView((LinearLayout) object);
}
public void pausevideo() {
mVideoView.stopPlayback();
}
public void play(int position) {
mVideoView.setVideoURI(Uri
.parse("android.resource://mypackagename/"
+ arrayvid[position]));
mVideoView.requestFocus();
mVideoView.start();
}
}
MainActivity.java
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.widget.ImageButton;
public class MainActivity extends Activity {
// Declare Variables
ViewPager viewPager;
PagerAdapter adapter;
String[] rank;
private ImageButton play;
String[] country;
String[] population;
int[] flag;
public int position;
int[] arrayvid;
boolean isRunning = true;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from viewpager_main.xml
setContentView(R.layout.viewpager_main);
play = (ImageButton) findViewById(R.id.btnPlayAB);
// Generate sample data
rank = new String[] { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10" };
country = new String[] { "China", "India", "United States",
"Indonesia", "Brazil", "Pakistan", "Nigeria", "Bangladesh",
"Russia", "Japan" };
population = new String[] { "1,354,040,000", "1,210,193,422",
"315,761,000", "237,641,326", "193,946,886", "182,912,000",
"170,901,000", "152,518,015", "143,369,806", "127,360,000" };
flag = new int[] { R.drawable.china, R.drawable.india,
R.drawable.unitedstates, R.drawable.indonesia,
R.drawable.brazil, R.drawable.pakistan, R.drawable.nigeria,
R.drawable.bangladesh, R.drawable.russia, R.drawable.japan };
arrayvid = new int[] { R.raw.basiccrunch, R.raw.bicyclecrunch,
R.raw.reversecrunch, R.raw.longarmcrunch,
R.raw.crossovercrunch, R.raw.rightobliquecrunch,
R.raw.leftobliquecrunch, R.raw.halfcurl,
R.raw.verticallegcrunch, R.raw.plank };
// Locate the ViewPager in viewpager_main.xml
viewPager = (ViewPager) findViewById(R.id.pager);
// Pass results to ViewPagerAdapter Class
adapter = new ViewPagerAdapter(MainActivity.this, rank, country,
population, flag, arrayvid);
// Binds the Adapter to the ViewPager
viewPager.setAdapter(adapter);
play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isRunning) {
((ViewPagerAdapter) adapter).play(position);
isRunning = false;
play.setBackgroundResource(R.drawable.pausee);
} else {
((ViewPagerAdapter) adapter).pausevideo();
isRunning = true;
play.setBackgroundResource(R.drawable.playy);
}
}
});
}
}
viewpager_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical"
android:padding="10dp"
android:weightSum="10" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1.6"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="0dip"
android:layout_height="fill_parent"
android:layout_weight="3"
android:orientation="vertical" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/ranklabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/ranklabel" />
<TextView
android:id="@+id/rank"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/countrylabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/countrylabel" />
<TextView
android:id="@+id/country"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/populationlabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/populationlabel" />
<TextView
android:id="@+id/population"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
<ImageView
android:id="@+id/flag"
android:layout_width="0dip"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#000000"
android:padding="1dp" />
</LinearLayout>
<VideoView
android:id="@+id/VVExe"
android:layout_width="wrap_content"
android:layout_height="0dip"
android:layout_marginTop="5dp"
android:layout_weight="7.9"
android:gravity="center" />
</LinearLayout>
viewpager_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:weightSum="10" >
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="wrap_content"
android:layout_height="0dip"
android:layout_weight="8.6" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1.4"
android:gravity="center"
android:padding="10dp" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:background="#696969"
android:gravity="center"
android:orientation="horizontal"
android:weightSum="10" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
</LinearLayout>
<ImageButton
android:id="@+id/btnprevAB"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:background="@drawable/prevsel" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
</LinearLayout>
<ImageButton
android:id="@+id/btnPlayAB"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:background="@drawable/playsel" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
</LinearLayout>
<ImageButton
android:id="@+id/btnNextAB"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:background="@drawable/nextsel" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
</LinearLayout>
</LinearLayout>
</LinearLayout>
