亲宝软件园·资讯

展开

Android网络直播弹幕功能 Android实现炫酷的网络直播弹幕功能

shineflowers 人气:0
想了解Android实现炫酷的网络直播弹幕功能的相关内容吗,shineflowers在本文为您仔细讲解Android网络直播弹幕功能的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:Android,网络直播,弹幕,下面大家一起来学习吧。

现在网络直播越来越火,网络主播也逐渐成为一种新兴职业,对于网络直播,弹幕功能是必须要有的,如下图:

首先来分析一下,这个弹幕功能是怎么实现的,首先在最下面肯定是一个游戏界面View,然后游戏界面上有弹幕View,弹幕的View必须要做成完全透明的,这样即使覆盖在游戏界面的上方也不会影响到游戏的正常观看,只有当有人发弹幕消息时,再将消息绘制到弹幕的View上面就可以了,下方肯定还有有操作界面View,可以让用户来发弹幕和送礼物的功能,原理示意图如下所示:

参照原理图,下面一步一步来实现这个功能。

实现视频的播放

activity_main.xml

<RelativeLayout 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 android:id="@+id/activity_main" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
 android:background="#000"> 
 
 <VideoView 
  android:id="@+id/video_view" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:layout_centerInParent="true"/> 
</RelativeLayout> 

MainActivity.java

package com.jackie.bombscreen; 
 
import android.os.Build; 
import android.os.Bundle; 
import android.os.Environment; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.VideoView; 
 
public class MainActivity extends AppCompatActivity { 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  VideoView videoView = (VideoView) findViewById(R.id.video_view); 
  videoView.setVideoPath(Environment.getExternalStorageDirectory() + "/xiaoxingyun.mp4"); 
  videoView.start(); 
 } 
  
 @Override 
 public void onWindowFocusChanged(boolean hasFocus) { 
  super.onWindowFocusChanged(hasFocus); 
  if (hasFocus && Build.VERSION.SDK_INT >= 19) { 
   View decorView = getWindow().getDecorView(); 
   decorView.setSystemUiVisibility( 
     View.SYSTEM_UI_FLAG_LAYOUT_STABLE 
       | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 
       | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN 
       | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION 
       | View.SYSTEM_UI_FLAG_FULLSCREEN 
       | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY); 
  } 
 } 
} 

最后别忘了设置AndroidMainfest.xml

效果如下:

实现弹幕的效果

接下来我们开始实现弹幕效果。弹幕其实也就是一个自定义的View,它的上面可以显示类似于跑马灯的文字效果。观众们发表的评论都会在弹幕上显示出来,但又会很快地移出屏幕,既可以起到互动的作用,同时又不会影响视频的正常观看。

我们可以自己来编写这样的一个自定义View,当然也可以直接使用网上现成的开源项目。那么为了能够简单快速地实现弹幕效果,这里我就准备直接使用由哔哩哔哩开源的弹幕效果库DanmakuFlameMaster。

DanmakuFlameMaster库的项目主页地址是:https://github.com/Bilibili/DanmakuFlameMaster

添加build.gradle依赖

compile 'com.github.ctiao:DanmakuFlameMaster:0.5.3'

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 android:id="@+id/activity_main" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
 android:background="#000"> 
 
 <VideoView 
  android:id="@+id/video_view" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:layout_centerInParent="true"/> 
 
 <master.flame.danmaku.ui.widget.DanmakuView 
  android:id="@+id/danmaku_view" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" /> 
</RelativeLayout> 

修改MainActivity.java

package com.jackie.bombscreen; 
 
import android.graphics.Color; 
import android.os.Build; 
import android.os.Bundle; 
import android.os.Environment; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.VideoView; 
 
import java.util.Random; 
 
import master.flame.danmaku.controller.DrawHandler; 
import master.flame.danmaku.danmaku.model.BaseDanmaku; 
import master.flame.danmaku.danmaku.model.DanmakuTimer; 
import master.flame.danmaku.danmaku.model.IDanmakus; 
import master.flame.danmaku.danmaku.model.android.DanmakuContext; 
import master.flame.danmaku.danmaku.model.android.Danmakus; 
import master.flame.danmaku.danmaku.parser.BaseDanmakuParser; 
import master.flame.danmaku.ui.widget.DanmakuView; 
 
public class MainActivity extends AppCompatActivity { 
 private boolean mIsShowDanmaku; 
 private DanmakuView mDanmakuView; 
 private DanmakuContext mDanmakuContext; 
 
 private BaseDanmakuParser parser = new BaseDanmakuParser() { 
  @Override 
  protected IDanmakus parse() { 
   return new Danmakus(); 
  } 
 }; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  VideoView videoView = (VideoView) findViewById(R.id.video_view); 
  videoView.setVideoPath(Environment.getExternalStorageDirectory() + "/xiaoxingyun.mp4"); 
  videoView.start(); 
 
  mDanmakuView = (DanmakuView) findViewById(R.id.danmaku_view); 
  mDanmakuView.enableDanmakuDrawingCache(true); 
  mDanmakuView.setCallback(new DrawHandler.Callback() { 
   @Override 
   public void prepared() { 
    mIsShowDanmaku = true; 
    mDanmakuView.start(); 
    generateSomeDanmaku(); 
   } 
 
   @Override 
   public void updateTimer(DanmakuTimer timer) { 
 
   } 
 
   @Override 
   public void danmakuShown(BaseDanmaku danmaku) { 
 
   } 
 
   @Override 
   public void drawingFinished() { 
 
   } 
  }); 
 
  mDanmakuContext = DanmakuContext.create(); 
  mDanmakuView.prepare(parser, mDanmakuContext); 
 } 
 
 /** 
  * 向弹幕View中添加一条弹幕 
  * @param content  弹幕的具体内容 
  * @param withBorder 弹幕是否有边框 
  */ 
 private void addDanmaku(String content, boolean withBorder) { 
  BaseDanmaku danmaku = mDanmakuContext.mDanmakuFactory.createDanmaku(BaseDanmaku.TYPE_SCROLL_RL); 
  danmaku.text = content; 
  danmaku.padding = 5; 
  danmaku.textSize = sp2px(20); 
  danmaku.textColor = Color.WHITE; 
  danmaku.setTime(mDanmakuView.getCurrentTime()); 
  if (withBorder) { 
   danmaku.borderColor = Color.GREEN; 
  } 
  mDanmakuView.addDanmaku(danmaku); 
 } 
 
 /** 
  * 随机生成一些弹幕内容以供测试 
  */ 
 private void generateSomeDanmaku() { 
  new Thread(new Runnable() { 
   @Override 
   public void run() { 
    while(mIsShowDanmaku) { 
     int time = new Random().nextInt(300); 
     String content = "" + time + time; 
     addDanmaku(content, false); 
     try { 
      Thread.sleep(time); 
     } catch (InterruptedException e) { 
      e.printStackTrace(); 
     } 
    } 
   } 
  }).start(); 
 } 
 
 /** 
  * sp转px的方法。 
  */ 
 public int sp2px(float spValue) { 
  final float fontScale = getResources().getDisplayMetrics().scaledDensity; 
  return (int) (spValue * fontScale + 0.5f); 
 } 
 
 @Override 
 protected void onPause() { 
  super.onPause(); 
  if (mDanmakuView != null && mDanmakuView.isPrepared()) { 
   mDanmakuView.pause(); 
  } 
 } 
 
 @Override 
 protected void onResume() { 
  super.onResume(); 
  if (mDanmakuView != null && mDanmakuView.isPrepared() && mDanmakuView.isPaused()) { 
   mDanmakuView.resume(); 
  } 
 } 
 
 @Override 
 protected void onDestroy() { 
  super.onDestroy(); 
  mIsShowDanmaku = false; 
  if (mDanmakuView != null) { 
   mDanmakuView.release(); 
   mDanmakuView = null; 
  } 
 } 
  
 @Override 
 public void onWindowFocusChanged(boolean hasFocus) { 
  super.onWindowFocusChanged(hasFocus); 
  if (hasFocus && Build.VERSION.SDK_INT >= 19) { 
   View decorView = getWindow().getDecorView(); 
   decorView.setSystemUiVisibility( 
     View.SYSTEM_UI_FLAG_LAYOUT_STABLE 
       | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 
       | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN 
       | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION 
       | View.SYSTEM_UI_FLAG_FULLSCREEN 
       | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY); 
  } 
 } 
} 

效果图如下:

加入操作界面

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 android:id="@+id/activity_main" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
 android:background="#000"> 
 
 <VideoView 
  android:id="@+id/video_view" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:layout_centerInParent="true"/> 
 
 <master.flame.danmaku.ui.widget.DanmakuView 
  android:id="@+id/danmaku_view" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" /> 
 
 <LinearLayout 
  android:id="@+id/operation_layout" 
  android:layout_width="match_parent" 
  android:layout_height="50dp" 
  android:layout_alignParentBottom="true" 
  android:background="#fff" 
  android:visibility="gone"> 
 
  <EditText 
   android:id="@+id/edit_text" 
   android:layout_width="0dp" 
   android:layout_height="match_parent" 
   android:layout_weight="1" /> 
 
  <Button 
   android:id="@+id/send" 
   android:layout_width="wrap_content" 
   android:layout_height="match_parent" 
   android:text="Send" /> 
 </LinearLayout> 
</RelativeLayout> 
package com.jackie.bombscreen; 
 
import android.graphics.Color; 
import android.os.Build; 
import android.os.Bundle; 
import android.os.Environment; 
import android.support.v7.app.AppCompatActivity; 
import android.text.TextUtils; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.LinearLayout; 
import android.widget.VideoView; 
 
import java.util.Random; 
 
import master.flame.danmaku.controller.DrawHandler; 
import master.flame.danmaku.danmaku.model.BaseDanmaku; 
import master.flame.danmaku.danmaku.model.DanmakuTimer; 
import master.flame.danmaku.danmaku.model.IDanmakus; 
import master.flame.danmaku.danmaku.model.android.DanmakuContext; 
import master.flame.danmaku.danmaku.model.android.Danmakus; 
import master.flame.danmaku.danmaku.parser.BaseDanmakuParser; 
import master.flame.danmaku.ui.widget.DanmakuView; 
 
public class MainActivity extends AppCompatActivity { 
 private boolean mIsShowDanmaku; 
 private DanmakuView mDanmakuView; 
 private DanmakuContext mDanmakuContext; 
 
 private BaseDanmakuParser parser = new BaseDanmakuParser() { 
  @Override 
  protected IDanmakus parse() { 
   return new Danmakus(); 
  } 
 }; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  VideoView videoView = (VideoView) findViewById(R.id.video_view); 
  videoView.setVideoPath(Environment.getExternalStorageDirectory() + "/xiaoxingyun.mp4"); 
  videoView.start(); 
 
  mDanmakuView = (DanmakuView) findViewById(R.id.danmaku_view); 
  mDanmakuView.enableDanmakuDrawingCache(true); 
  mDanmakuView.setCallback(new DrawHandler.Callback() { 
   @Override 
   public void prepared() { 
    mIsShowDanmaku = true; 
    mDanmakuView.start(); 
    generateSomeDanmaku(); 
   } 
 
   @Override 
   public void updateTimer(DanmakuTimer timer) { 
 
   } 
 
   @Override 
   public void danmakuShown(BaseDanmaku danmaku) { 
 
   } 
 
   @Override 
   public void drawingFinished() { 
 
   } 
  }); 
 
  mDanmakuContext = DanmakuContext.create(); 
  mDanmakuView.prepare(parser, mDanmakuContext); 
 
  final LinearLayout operationLayout = (LinearLayout) findViewById(R.id.operation_layout); 
  final Button send = (Button) findViewById(R.id.send); 
  final EditText editText = (EditText) findViewById(R.id.edit_text); 
  mDanmakuView.setOnClickListener(new View.OnClickListener() { 
   @Override 
   public void onClick(View view) { 
    if (operationLayout.getVisibility() == View.GONE) { 
     operationLayout.setVisibility(View.VISIBLE); 
    } else { 
     operationLayout.setVisibility(View.GONE); 
    } 
   } 
  }); 
   
  send.setOnClickListener(new View.OnClickListener() { 
   @Override 
   public void onClick(View view) { 
    String content = editText.getText().toString(); 
    if (!TextUtils.isEmpty(content)) { 
     addDanmaku(content, true); 
     editText.setText(""); 
    } 
   } 
  }); 
 
  getWindow().getDecorView().setOnSystemUiVisibilityChangeListener (new View.OnSystemUiVisibilityChangeListener() { 
   @Override 
   public void onSystemUiVisibilityChange(int visibility) { 
    if (visibility == View.SYSTEM_UI_FLAG_VISIBLE) { 
     onWindowFocusChanged(true); 
    } 
   } 
  }); 
 } 
 
 /** 
  * 向弹幕View中添加一条弹幕 
  * @param content  弹幕的具体内容 
  * @param withBorder 弹幕是否有边框 
  */ 
 private void addDanmaku(String content, boolean withBorder) { 
  BaseDanmaku danmaku = mDanmakuContext.mDanmakuFactory.createDanmaku(BaseDanmaku.TYPE_SCROLL_RL); 
  danmaku.text = content; 
  danmaku.padding = 5; 
  danmaku.textSize = sp2px(20); 
  danmaku.textColor = Color.WHITE; 
  danmaku.setTime(mDanmakuView.getCurrentTime()); 
  if (withBorder) { 
   danmaku.borderColor = Color.GREEN; 
  } 
  mDanmakuView.addDanmaku(danmaku); 
 } 
 
 /** 
  * 随机生成一些弹幕内容以供测试 
  */ 
 private void generateSomeDanmaku() { 
  new Thread(new Runnable() { 
   @Override 
   public void run() { 
    while(mIsShowDanmaku) { 
     int time = new Random().nextInt(300); 
     String content = "" + time + time; 
     addDanmaku(content, false); 
     try { 
      Thread.sleep(time); 
     } catch (InterruptedException e) { 
      e.printStackTrace(); 
     } 
    } 
   } 
  }).start(); 
 } 
 
 /** 
  * sp转px的方法。 
  */ 
 public int sp2px(float spValue) { 
  final float fontScale = getResources().getDisplayMetrics().scaledDensity; 
  return (int) (spValue * fontScale + 0.5f); 
 } 
 
 @Override 
 protected void onPause() { 
  super.onPause(); 
  if (mDanmakuView != null && mDanmakuView.isPrepared()) { 
   mDanmakuView.pause(); 
  } 
 } 
 
 @Override 
 protected void onResume() { 
  super.onResume(); 
  if (mDanmakuView != null && mDanmakuView.isPrepared() && mDanmakuView.isPaused()) { 
   mDanmakuView.resume(); 
  } 
 } 
 
 @Override 
 protected void onDestroy() { 
  super.onDestroy(); 
  mIsShowDanmaku = false; 
  if (mDanmakuView != null) { 
   mDanmakuView.release(); 
   mDanmakuView = null; 
  } 
 } 
 
 
 @Override 
 public void onWindowFocusChanged(boolean hasFocus) { 
  super.onWindowFocusChanged(hasFocus); 
  if (hasFocus && Build.VERSION.SDK_INT >= 19) { 
   View decorView = getWindow().getDecorView(); 
   decorView.setSystemUiVisibility( 
     View.SYSTEM_UI_FLAG_LAYOUT_STABLE 
       | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 
       | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN 
       | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION 
       | View.SYSTEM_UI_FLAG_FULLSCREEN 
       | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY); 
  } 
 } 
} 

效果图如下:

自己发的弹幕有绿色边框,很容易区分。

基本上实现了弹幕的功能,当然,里面的知识点还有很多,这只是最基本的功能。有时间的话,建议学学DanmakuFlameMaster,里面还有很多炫酷的功能。

加载全部内容

相关教程
猜你喜欢
用户评论