流媒体开发之--直播实现

       可可工作室出品：

欢迎使用可可直播视频播放器：

http://pan.baidu.com/share/link?shareid=3291150676&uk=4111208708

    网上大多数直播软件都会提供一个功能就是自定义，这个由于版本问题，而为了让用户看到自己想看的频道，可以让用户自己添加找到的源，然后进行播放，俗话说法不责众，这个功能是如何实现的呢，其实也是很简单的，无法就是记录下用户添加的数据，然后保存下来，这里主要用到了数据库，用户点击自己添加的源，程序会从数据库取出链接，例如http，rtsp等开头的流媒体链接，具体的实现如下，我们是在之前流媒体开发之--直播实现的基础上继续完善。

      首先就是设计一个布局，里面使用ListView来填充，custom.xml，内容如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <TextView 
        android:id="@+id/custom_title"
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:text="直播"
        android:textSize="27sp"
        android:gravity="center"
        />

    <ListView 
        android:id="@+id/custom_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        ></ListView>
</LinearLayout>

我们同时还需要一个ListView的一个Item和一个foot用来显示添加的源和实现添加功能，内容如下：

custom_list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >
    
    <TextView 
        android:id="@+id/custom_list_item_name"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:singleLine="true"
        android:text="频道"
        />
	<TextView 
	    android:id="@+id/custom_list_item_url"
	    android:layout_width="match_parent"
	    android:layout_height="30dp"
	    android:text="视频源链接"
	    />
</LinearLayout>

custom_list_foot.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView 
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:text="点击此处添加视频源"
        android:textSize="25sp"
        />

</LinearLayout>

我上面只是使用TextView来显示，如果需要美化，可以添加ImageView来实现图文并茂，布局写完后，我们就要添加一个数据库用来记录添加的视频源，为了方便起见，我们还需要定义一个自定义视频内容格式的类，内容如下：

CustomVideo.java

package com.jwzhangjie.live.type;

import java.io.Serializable;

public class CustomVideo implements Serializable{

	private static final long serialVersionUID = 2166585200370610099L;

	private String name;
	private String url;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getUrl() {
		return url;
	}
	public void setUrl(String url) {
		this.url = url;
	}
}

DBHelper.java

package com.jwzhangjie.live.db;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

public class DBHelper extends SQLiteOpenHelper{

	public static final String DB_NAME = "custom.sqlite";
	public static final String TABLE_NAME_VIDEO = "custom";
	public static final String CAMERA_SQL = "CREATE TABLE video ('_id' INTEGER PRIMARY KEY  AUTOINCREMENT, 'name' VARCHAR, 'url' VARCHAR)";
	public static int DB_VERSION = 1;
	public DBHelper(Context context, String name, CursorFactory factory,
			int version) {
		super(context, DB_NAME, null, DB_VERSION);
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		db.execSQL(CAMERA_SQL);
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		
	}

}

当然有这个还不行，我们还需要创建一个实现数据库各种操作的类，定义如下：

package com.jwzhangjie.live.utils;

import java.util.ArrayList;
import java.util.List;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.jwzhangjie.live.db.DBHelper;
import com.jwzhangjie.live.type.CustomVideo;

public class DBUtils {

	private static DBHelper mDbHelper;
	public DBUtils(Context context){
		mDbHelper = new DBHelper(context);
	}
	
	/**
	 * insert custom video
	 */
	public void insertCustomVideo(CustomVideo customVideo){
		SQLiteDatabase dbDatabase = null;
		try {
			dbDatabase = mDbHelper.getWritableDatabase();
			if (dbDatabase == null) {
				return;
			}
			ContentValues contentValues = new ContentValues();
			contentValues.put("name", customVideo.getName());
			contentValues.put("url", customVideo.getUrl());
			dbDatabase.insertOrThrow("custom", null, contentValues);
		} catch (Exception e) {
		}finally{
			dbDatabase.close();
		}
	}
	
	public void deleteOneCustomVideo(String name){
		SQLiteDatabase dbDatabase = mDbHelper.getWritableDatabase();
		try {
			String sql = "DELETE FROM custom WHERE name = "+name;
			dbDatabase.execSQL(sql);
		} catch (Exception e) {
		}finally{
			dbDatabase.close();
		}
	}
	
	public List<CustomVideo> getAllCameras(){
		List<CustomVideo> list = new ArrayList<CustomVideo>();
		SQLiteDatabase dbDatabase = mDbHelper.getWritableDatabase();
		String sql = "SELECT * FROM custom";
		Cursor cursor = dbDatabase.rawQuery(sql, null);
		while (!cursor.isLast()) {
			cursor.moveToNext();
			CustomVideo video = new CustomVideo();
			video.setId(cursor.getInt(0));
			video.setName(cursor.getString(1));
			video.setUrl(cursor.getString(2));
			list.add(video);
		}
		dbDatabase.close();
		return list;
	}
	
	public int getAllCustomVideoCount(){
		SQLiteDatabase db = mDbHelper.getReadableDatabase();
		Cursor cursor = db.rawQuery("select count(*) from custom", null);
		cursor.moveToNext();
		int count = cursor.getInt(0);
		cursor.close();
		db.close();
		return count;
	}
	
}

做完上述事情后，我们就要设计显示界面操作，首先就是适配器的设计：

package com.jwzhangjie.live.utils;

import java.util.ArrayList; import java.util.List;

import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase;

import com.jwzhangjie.live.db.DBHelper; import com.jwzhangjie.live.type.CustomVideo;

public class DBUtils {

 public static DBHelper mDbHelper;  public DBUtils(Context context){   mDbHelper = new DBHelper(context);  }    /**   * insert custom video   */  public void insertCustomVideo(CustomVideo customVideo){   SQLiteDatabase dbDatabase = null;   try {    dbDatabase = mDbHelper.getWritableDatabase();    if (dbDatabase == null) {     return;    }    ContentValues contentValues = new ContentValues();    contentValues.put("name", customVideo.getName());    contentValues.put("url", customVideo.getUrl());    dbDatabase.insertOrThrow("custom", null, contentValues);   } catch (Exception e) {   }finally{    dbDatabase.close();   }  }    public void deleteOneCustomVideo(String url){   SQLiteDatabase dbDatabase = mDbHelper.getWritableDatabase();   try {    String sql = "DELETE FROM custom WHERE url = "+url;    dbDatabase.execSQL(sql);   } catch (Exception e) {   }finally{    dbDatabase.close();   }  }    public List<CustomVideo> getAllCameras(){   List<CustomVideo> list = new ArrayList<CustomVideo>();   SQLiteDatabase dbDatabase = mDbHelper.getWritableDatabase();   String sql = "SELECT * FROM custom";   Cursor cursor = dbDatabase.rawQuery(sql, null);   while (!cursor.isLast()) {    cursor.moveToNext();    CustomVideo video = new CustomVideo();    video.setId(cursor.getInt(0));    video.setName(cursor.getString(1));    video.setUrl(cursor.getString(2));    list.add(video);   }   dbDatabase.close();   return list;  }    public int getAllCustomVideoCount(){   SQLiteDatabase db = mDbHelper.getReadableDatabase();   Cursor cursor = db.rawQuery("select count(*) from custom", null);   cursor.moveToNext();   int count = cursor.getInt(0);   cursor.close();   db.close();   return count;  }   }

适配器设置完毕后，我们剩下显示界面了

package com.jwzhangjie.live;

import java.util.ArrayList;
import java.util.List;

import com.jwzhangjie.live.adapter.CustomVideoAdapter;
import com.jwzhangjie.live.type.CustomVideo;
import com.jwzhangjie.live.utils.DBUtils;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;

public class CustomVideoList extends Activity implements OnItemClickListener, OnClickListener{

	public ListView customVideoListView;
	public CustomVideoAdapter listAdapter;
	private List<CustomVideo> listVideos;
	public Button addBtn;
	public EditText addUrl;
	DBUtils dbUtils = new DBUtils(this);
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.custom);
		addBtn = (Button)findViewById(R.id.add);
		addUrl = (EditText)findViewById(R.id.addurl);
		customVideoListView = (ListView)findViewById(R.id.custom_list);
		listAdapter = new CustomVideoAdapter(this);
		customVideoListView.setAdapter(listAdapter);
		customVideoListView.setOnItemClickListener(this);
		addBtn.setOnClickListener(this);
		addUrl.setText("http://74.82.62.53:1935/liverepeater/10.stream/playlist.m3u8");
		int size = dbUtils.getAllCustomVideoCount();
		if (size != 0) {
			listVideos = dbUtils.getAllCameras();
			listAdapter.setCustomVideoList(listVideos);
		}else {
			listVideos = new ArrayList<CustomVideo>();
		}
	}
	@Override
	protected void onResume() {
		super.onResume();
	}
	@Override
	public void onClick(View v) {
		if (v == addBtn) {
			if (addUrl.getText() != null) {
				CustomVideo customVideo = new CustomVideo();
				customVideo.setName("视频");
				customVideo.setUrl(addUrl.getText().toString());
				dbUtils.insertCustomVideo(customVideo);
				listAdapter.insertCustomVideo(customVideo);
				listVideos.add(customVideo);
			}
		}
	}
	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position,
			long id) {
		Intent intent = new Intent();
		intent.setClass(CustomVideoList.this, JieVideoPlayer.class);
		intent.putExtra("path", listVideos.get(position).getUrl());
		startActivity(intent);
	}
	

}

效果如下：

点击你选择的视频也能够播放视频，自定义功能就这些。

欢迎使用可可直播视频播放器：

http://pan.baidu.com/share/link?shareid=3291150676&uk=4111208708