手機影音8--視頻播放器的高級功能(1)

1.讓其他軟體能調起自己寫的播放器

1.在功能清單文件添加下麵的意圖

<intent-filter>
	<action android:name="android.intent.action.VIEW" />
	<category android:name="android.intent.category.DEFAULT" />
	<category android:name="android.intent.category.BROWSABLE" />
	<data android:scheme="rtsp" />
 </intent-filter>
 <intent-filter>
	<action android:name="android.intent.action.VIEW" />
	<category android:name="android.intent.category.DEFAULT" />
	<data android:mimeType="video/*" />
	<data android:mimeType="application/sdp" />
 </intent-filter>
 <intent-filter>
	<action android:name="android.intent.action.VIEW" />
	<category android:name="android.intent.category.DEFAULT" />
	<category android:name="android.intent.category.BROWSABLE" />
	<data android:scheme="http" />
	<data android:mimeType="video/mp4" />
	<data android:mimeType="video/3gp" />
	<data android:mimeType="video/3gpp" />
	<data android:mimeType="video/3gpp2" />
 </intent-filter>

2.文件或者圖片瀏覽器 //1.調起系統所有的播放-隱式意圖 Intent intent = new Intent(); intent.setDataAndType(Uri.parse("視頻播放地址"),"video/*"); context.startActivity(intent);

3.視頻播放器就會被調起並且播放

uri = getIntent().getData();//文件夾，圖片瀏覽器，QQ空間

4.設置播放地址

videoview.setVideoURI(uri);

2.播放網路視頻時候支持顯示緩存進度　　

1_支持播放網路視頻有緩衝效果

/**
  * 判斷是否是網路資源
  * @param uri
  * @return
*/
public boolean isNetUri(Uri uri) {
   boolean result = false;
   if (uri != null) {
	if (uri.toString().contains("http")|| uri.toString().contains("RTSP")|| uri.toString().contains("MMS")) {
	    result = true;
	} else {
	    result = false;
	}
   }
   return result;
}

2_播放網路視頻時候支持顯示緩存進度

//緩存進度的更新
if (isNetUri) {
	//只有網路資源才有緩存效果
	int buffer = videoview.getBufferPercentage();//0~100
	int totalBuffer = buffer * seekbarVideo.getMax();
	int secondaryProgress = totalBuffer / 100;
	seekbarVideo.setSecondaryProgress(secondaryProgress);
} else {
	//本地視頻沒有緩衝效果
	seekbarVideo.setSecondaryProgress(0);
}

3.監聽卡並且提示&監聽拖動完成　　

1_監聽卡並且提示

<!-- 卡的效果 -->
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ll_videobuffer"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:background="#33000000"
    android:visibility="gone"
    android:gravity="center"
    android:orientation="horizontal">

    <ProgressBar
       android:layout_width="30dp"
       android:layout_height="30dp" />

    <TextView
       android:id="@+id/tv_netspeed"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_marginLeft="5dp"
       android:text="網速:20kb/s"
       android:textColor="@android:color/white"
       android:textSize="18sp" />

</LinearLayout>　　

代碼
在VideoView中定義監聽卡方法和監聽完成方法

//設置監聽卡2.3包括以後的版本才有
videoview.setOnInfoListener(new OnInfoListener() {
       
  @Override
  public boolean onInfo(MediaPlayer mp, int what, int extra) {
     switch (what) {
       case MediaPlayer.MEDIA_INFO_BUFFERING_START://當卡的時候和拖動卡的時候回調
//         Toast.makeText(getApplicationContext(), "視頻卡了", 1).show();
            player_buffer.setVisibility(View.VISIBLE);
            isBuffing = true;
            break;
          case MediaPlayer.MEDIA_INFO_BUFFERING_END://當卡的時候和拖動卡結束的時候回調
//         Toast.makeText(getApplicationContext(), "視頻不卡了", 1).show();
            player_buffer.setVisibility(View.GONE);
            isBuffing = false;
            break;
          }
          return true;
       }
});

2_自定義監聽卡

//監聽卡
if (!isUseSystem) {
	if(videoview.isPlaying()){
		int buffer = currentPosition - precurrentPosition;
		if (buffer < 500) {
			//視頻卡了
			ll_buffer.setVisibility(View.VISIBLE);
		} else {
			//視頻不卡了
			ll_buffer.setVisibility(View.GONE);
		}
	}else{
		ll_buffer.setVisibility(View.GONE);
	}
}

3_監聽拖動完成

//設置拖動完成
videoview.setOnSeekCompleteListener(new OnSeekCompleteListener() {
   
   @Override
   public void onSeekComplete(MediaPlayer mp) {
	  if(isBuffing){
		// TODO Auto-generated method stub
		player_buffer.setVisibility(View.GONE);
	  }  
   }

});

百度搜索：android 獲取當前網速
http://www.2cto.com/kf/201412/358191.html

/**
 * 得到當前的網速
 *@paramcontext
 *@return
 */
public String getNetSpeed(Context context) {
    long nowTotalRxBytes = TrafficStats.getUidRxBytes(context.getApplicationInfo().uid)==TrafficStats.UNSUPPORTED ? 0 :(TrafficStats.getTotalRxBytes()/1024);//轉為KB;
    long nowTimeStamp = System.currentTimeMillis();
    longspeed = ((nowTotalRxBytes - lastTotalRxBytes) *1000 / (nowTimeStamp - lastTimeStamp));//毫秒轉換
    lastTimeStamp = nowTimeStamp;
    lastTotalRxBytes = nowTotalRxBytes;
    String speedStr = String.valueOf(speed) + " kb/s";
    return speedStr;
}