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DistributedVideoPlayer分布式視頻播放器(一)

DistributedVideoPlayer 分布式視頻播放器(一)

作者：Buty9147 2021-10-19 14:27:07

開(kāi)發(fā)

前端

分布式 本示例是在官方Video Play Ability 模板基礎(chǔ)上做了擴(kuò)展開(kāi)發(fā),官方模板提供基本的視頻播放功能，并允許您在手機(jī)和電視之間傳輸視頻.

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想了解更多內(nèi)容，請(qǐng)?jiān)L問(wèn)：

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介紹

本示例是在官方Video Play Ability 模板基礎(chǔ)上做了擴(kuò)展開(kāi)發(fā),官方模板提供基本的視頻播放功能，并允許您在手機(jī)和電視之間傳輸視頻.

應(yīng)用分為手機(jī)端(entry)和TV端(entrytv),以及一個(gè)依賴模塊(commonlib).

在示例的基礎(chǔ)之上,手機(jī)端增加了視頻播放列表功能,以及播放詳情頁(yè)和評(píng)論功能;手機(jī)端播放的視頻可以流轉(zhuǎn)到TV端,并實(shí)現(xiàn)遠(yuǎn)端遙控的功能。

內(nèi)容比較多,會(huì)分兩期給大家講解,本期文章主要講解的內(nèi)容是手機(jī)端部分:

1.實(shí)現(xiàn)一個(gè)視頻播放器 2.實(shí)現(xiàn)一個(gè)播放列表 3.實(shí)現(xiàn)一個(gè)評(píng)論功能.

[本文正在參與優(yōu)質(zhì)創(chuàng)作者激勵(lì)]

效果展示

搭建環(huán)境

安裝DevEco Studio，詳情請(qǐng)參考DevEco Studio下載。

設(shè)置DevEco Studio開(kāi)發(fā)環(huán)境，DevEco Studio開(kāi)發(fā)環(huán)境需要依賴于網(wǎng)絡(luò)環(huán)境，需要連接上網(wǎng)絡(luò)才能確保工具的正常使用，可以根據(jù)如下兩種情況來(lái)配置開(kāi)發(fā)環(huán)境：

如果可以直接訪問(wèn)Internet，只需進(jìn)行下載HarmonyOS SDK操作。

如果網(wǎng)絡(luò)不能直接訪問(wèn)Internet，需要通過(guò)代理服務(wù)器才可以訪問(wèn)，請(qǐng)參考配置開(kāi)發(fā)環(huán)境。

下載源碼后，使用DevEco 打開(kāi)項(xiàng)目。

代碼結(jié)構(gòu)

Java代碼

  
 
 
 
    
   
  
  
  
  1. │  config.json
    2. 
   
  
  
  
  2. │
    3. 
   
  
  
  
  3. ├─java
    4. 
   
  
  
  
  4. │  └─com
    5. 
   
  
  
  
  5. │      └─buty
    6. 
   
  
  
  
  6. │          └─distributedvideoplayer
    7. 
   
  
  
  
  7. │              │  MainAbility.java               
    8. 
   
  
  
  
  8. │              │  MyApplication.java
    9. 
   
  
  
  
  9. │              │
    10. 
   
  
  
  
  10. │              ├─ability
    11. 
   
  
  
  
  11. │              │      DevicesSelectAbility.java   
    12. 
   
  
  
  
  12. │              │      MainAbilitySlice.java           #視頻播放列表頁(yè)
    13. 
   
  
  
  
  13. │              │      SyncControlServiceAbility.java  
    14. 
   
  
  
  
  14. │              │      VideoPlayAbility.java           #視頻播放Ability
    15. 
   
  
  
  
  15. │              │      VideoPlayAbilitySlice.java      #視頻播放詳情和評(píng)論頁(yè)
    16. 
   
  
  
  
  16. │              │
    17. 
   
  
  
  
  17. │              ├─components
    18. 
   
  
  
  
  18. │              │      EpisodesSelectionDialog.java    
    19. 
   
  
  
  
  19. │              │      RemoteController.java
    20. 
   
  
  
  
  20. │              │      VideoPlayerPlaybackButton.java  #播放按鈕組件
    21. 
   
  
  
  
  21. │              │      VideoPlayerSlider.java          #播放時(shí)間進(jìn)度條
    22. 
   
  
  
  
  22. │              │
    23. 
   
  
  
  
  23. │              ├─constant
    24. 
   
  
  
  
  24. │              │      Constants.java                  #常量
    25. 
   
  
  
  
  25. │              │      ResolutionEnum.java             #分辨率枚舉
    26. 
   
  
  
  
  26. │              │      RouteRegister.java              #自定義路由
    27. 
   
  
  
  
  27. │              │
    28. 
   
  
  
  
  28. │              ├─data
    29. 
   
  
  
  
  29. │              │      VideoInfo.java                  #視頻基礎(chǔ)信息
    30. 
   
  
  
  
  30. │              │      VideoInfoService.java           #視頻信息服務(wù),用于模擬數(shù)據(jù)
    31. 
   
  
  
  
  31. │              │      Videos.java                     #視頻列表
    32. 
   
  
  
  
  32. │              │ 
    33. 
   
  
  
  
  33. │              ├─model
    34. 
   
  
  
  
  34. │              │      CommentModel.java               #評(píng)論模型
    35. 
   
  
  
  
  35. │              │      DeviceModel.java                
    36. 
   
  
  
  
  36. │              │      ResolutionModel.java            #解析度模型
    37. 
   
  
  
  
  37. │              │      VideoModel.java                 #視頻模型
    38. 
   
  
  
  
  38. │              │
    39. 
   
  
  
  
  39. │              ├─provider
    40. 
   
  
  
  
  40. │              │      CommentItemProvider.java        #評(píng)論數(shù)據(jù)提供程序
    41. 
   
  
  
  
  41. │              │      DeviceItemProvider.java      
    42. 
   
  
  
  
  42. │              │      ResolutionItemProvider.java     #解析度數(shù)據(jù)提供程序
    43. 
   
  
  
  
  43. │              │      VideoItemProvider.java          #視頻數(shù)據(jù)提供程序
    44. 
   
  
  
  
  44. │              │
    45. 
   
  
  
  
  45. │              └─utils
    46. 
   
  
  
  
  46. │                      AppUtil.java                   #工具類
    47. 
   
  
  
  
  47. │                      DateUtils.java
    48.

資源文件

  
 
 
 
    
   
  
  
  
  1. └─resources
    2. 
   
  
  
  
  2.     ├─base
    3. 
   
  
  
  
  3.     │  ├─element
    4. 
   
  
  
  
  4.     │  │      color.json
    5. 
   
  
  
  
  5.     │  │      float.json
    6. 
   
  
  
  
  6.     │  │      strarray.json
    7. 
   
  
  
  
  7.     │  │      string.json
    8. 
   
  
  
  
  8.     │  │
    9. 
   
  
  
  
  9.     │  ├─graphic
    10. 
   
  
  
  
  10.     │  │      background_ability_control_bg.xml          
    11. 
   
  
  
  
  11.     │  │      background_ability_control_middle.xml
    12. 
   
  
  
  
  12.     │  │      background_ability_control_ok.xml
    13. 
   
  
  
  
  13.     │  │      background_ability_devices.xml
    14. 
   
  
  
  
  14.     │  │      background_ability_episodes.xml
    15. 
   
  
  
  
  15.     │  │      background_button_click.xml
    16. 
   
  
  
  
  16.     │  │      background_button_clicked.xml
    17. 
   
  
  
  
  17.     │  │      background_episodes_item.xml
    18. 
   
  
  
  
  18.     │  │      background_episodes_quality.xml
    19. 
   
  
  
  
  19.     │  │      background_episodes_trailer.xml
    20. 
   
  
  
  
  20.     │  │      background_slide_thumb.xml
    21. 
   
  
  
  
  21.     │  │      background_switch_checked.xml
    22. 
   
  
  
  
  22.     │  │      background_switch_empty.xml
    23. 
   
  
  
  
  23.     │  │      background_switch_thumb.xml
    24. 
   
  
  
  
  24.     │  │      background_switch_track.xml
    25. 
   
  
  
  
  25.     │  │      list_divider.xml
    26. 
   
  
  
  
  26.     │  │      shape_slider_thumb.xml
    27. 
   
  
  
  
  27.     │  │
    28. 
   
  
  
  
  28.     │  ├─layout
    29. 
   
  
  
  
  29.     │  │      ability_main.xml                                #播放列表布局
    30. 
   
  
  
  
  30.     │  │      comments_item.xml                               #單條評(píng)論布局
    31. 
   
  
  
  
  31.     │  │      dialog_playlist.xml                     
    32. 
   
  
  
  
  32.     │  │      dialog_resolution_list.xml
    33. 
   
  
  
  
  33.     │  │      dialog_table_layout.xml
    34. 
   
  
  
  
  34.     │  │      hm_sample_ability_video_box.xml                 #視頻播放組件頁(yè)
    35. 
   
  
  
  
  35.     │  │      hm_sample_ability_video_comments.xml            #播放詳情布局頁(yè)
    36. 
   
  
  
  
  36.     │  │      hm_sample_view_video_box_seek_bar_style1.xml    #播放進(jìn)度條布局
    37. 
   
  
  
  
  37.     │  │      hm_sample_view_video_box_seek_bar_style2.xml
    38. 
   
  
  
  
  38.     │  │      remote_ability_control.xml
    39. 
   
  
  
  
  39.     │  │      remote_ability_episodes.xml
    40. 
   
  
  
  
  40.     │  │      remote_ability_select_devices.xml
    41. 
   
  
  
  
  41.     │  │      remote_ability_sound_equipment.xml
    42. 
   
  
  
  
  42.     │  │      remote_device_item.xml
    43. 
   
  
  
  
  43.     │  │      remote_episodes_item.xml
    44. 
   
  
  
  
  44.     │  │      remote_video_quality_item.xml
    45. 
   
  
  
  
  45.     │  │
    46. 
   
  
  
  
  46.     │  ├─media
    47. 
   
  
  
  
  47.     │  │      comments.png
    48. 
   
  
  
  
  48.     │  │      great.png
    49. 
   
  
  
  
  49.     │  │      icon.png
    50. 
   
  
  
  
  50.     │  │      ic_anthology.png
    51. 
   
  
  
  
  51.     │  │
    52. 
   
  
  
  
  52.     │  └─profile
    53. 
   
  
  
  
  53.     ├─en
    54. 
   
  
  
  
  54.     │  └─element
    55. 
   
  
  
  
  55.     │          string.json
    56. 
   
  
  
  
  56.     │
    57. 
   
  
  
  
  57.     ├─rawfile
    58. 
   
  
  
  
  58.     │      videos.json                                      #模擬數(shù)據(jù)JSON文件
    59. 
   
  
  
  
  59.     │
    60. 
   
  
  
  
  60.     └─zh
    61. 
   
  
  
  
  61.         └─element
    62. 
   
  
  
  
  62.                 string.json
    63.

實(shí)現(xiàn)步驟

1.實(shí)現(xiàn)一個(gè)視頻播放器

引入對(duì)commonlib的依賴后,實(shí)現(xiàn)一個(gè)視頻播放器就很容易了.

entry的build.gradle 增加對(duì)commonlib的依賴

  
 
 
 
    
   
  
  
  
  1. dependencies {
    2. 
   
  
  
  
  2.     implementation fileTree(dir: 'libs', include: ['*.jar', '*.har'])
    3. 
   
  
  
  
  3.     testImplementation 'junit:junit:4.13'
    4. 
   
  
  
  
  4.     ohosTestImplementation 'com.huawei.ohos.testkit:runner:1.0.0.200'
    5. 
   
  
  
  
  5.     //引用commonlib 依賴
    6. 
   
  
  
  
  6.     implementation project(path: ':commonlib')
    7. 
   
  
  
  
  7. }
    8.

1.1.頁(yè)面布局 hm_sample_ability_video_comments.xml

添加一個(gè)VideoPlayerView組件

  
 
 
 
    
   
  
  
  
    2. 
   
  
  
  
  2. 
   
  
  
  
  3.     xmlns:ohos="http://schemas.huawei.com/res/ohos"
    4. 
   
  
  
  
  4.     ohos:id="$+id:root_layout"
    5. 
   
  
  
  
  5.     ohos:height="match_parent"
    6. 
   
  
  
  
  6.     ohos:width="match_parent"
    7. 
   
  
  
  
  7.     ohos:background_element="#FFFFFFFF"
    8. 
   
  
  
  
  8.     ohos:orientation="vertical">
    9. 
   
  
  
  
  9. 
   
  
  
  
  10.     
   
  
  
  
  11.         ohos:id="$+id:video_view"
    12. 
   
  
  
  
  12.         ohos:height="250vp"
    13. 
   
  
  
  
  13.         ohos:width="match_parent"/>
    14. 
   
  
  
  
  14. ...
    15. 
   
  
  
  
  15.

1.2.Java代碼

獲取視頻組件對(duì)象后,只需要2步就可以了: 1.設(shè)置視頻資源路徑和描述; 2.設(shè)置播放器核心組件和自定義組件.幾行關(guān)鍵代碼 VideoPlayAbilitySlice.java

  
 
 
 
    
   
  
  
  
  1. /**
    2. 
   
  
  
  
  2.  * 初始化播放器
    3. 
   
  
  
  
  3.  */
    4. 
   
  
  
  
  4. private void initPlayer() {
    5. 
   
  
  
  
  5.     HiLog.debug(LABEL, "initPlayer");
    6. 
   
  
  
  
  6.     //自定義視頻播放視圖組件
    7. 
   
  
  
  
  7.     player = (VideoPlayerView) findComponentById(ResourceTable.Id_video_view);
    8. 
   
  
  
  
  8. 
   
  
  
  
  9.     if (player != null) {
    10. 
   
  
  
  
  10.         //獲取視頻信息服務(wù)
    11. 
   
  
  
  
  11.         videoService = new VideoInfoService(getContext());
    12. 
   
  
  
  
  12.         //獲取當(dāng)前播放視頻的路徑
    13. 
   
  
  
  
  13.         String path = videoService
    14. 
   
  
  
  
  14.                 .getVideoInfoByIndex(currentPlayingIndex)
    15. 
   
  
  
  
  15.                 .getResolutions()
    16. 
   
  
  
  
  16.                 .get(currentPlayingResolutionIndex)
    17. 
   
  
  
  
  17.                 .getUrl();
    18. 
   
  
  
  
  18.         //視頻描述
    19. 
   
  
  
  
  19.         String videoDesc = videoService.getVideoInfoByIndex(currentPlayingIndex).getVideoDesc();
    20. 
   
  
  
  
  20.         HiLog.debug(LABEL, "videoDesc = " + videoDesc + " path = " + path);
    21. 
   
  
  
  
  21. 
   
  
  
  
  22.         if (path != null) {
    23. 
   
  
  
  
  23.             //設(shè)置路徑和描述
    24. 
   
  
  
  
  24.             player.setVideoPathAndTitle(path, videoDesc);
    25. 
   
  
  
  
  25.             //視頻準(zhǔn)備完畢就播放并設(shè)置播放進(jìn)度條
    26. 
   
  
  
  
  26.             player.setPlayerOnPreparedListener(
    27. 
   
  
  
  
  27.                     () -> {
    28. 
   
  
  
  
  28.                         player.start();
    29. 
   
  
  
  
  29.                         //設(shè)置播放位置
    30. 
   
  
  
  
  30.                         player.seekTo(currentPlayingPosition);
    31. 
   
  
  
  
  31.                     });
    32. 
   
  
  
  
  32.             //雙擊播放或暫停
    33. 
   
  
  
  
  33.             player.setDoubleClickedListener(
    34. 
   
  
  
  
  34.                     component -> {
    35. 
   
  
  
  
  35.                         //是否在控制TV端
    36. 
   
  
  
  
  36.                         if (remoteController != null && remoteController.isShown()) {
    37. 
   
  
  
  
  37.                             return;
    38. 
   
  
  
  
  38.                         }
    39. 
   
  
  
  
  39.                         HiLog.debug(LABEL, "VideoPlayView double-click event");
    40. 
   
  
  
  
  40.                         if (player.isPlaying()) {
    41. 
   
  
  
  
  41.                             player.pause();
    42. 
   
  
  
  
  42.                         } else {
    43. 
   
  
  
  
  43.                             player.start();
    44. 
   
  
  
  
  44.                         }
    45. 
   
  
  
  
  45.                     });
    46. 
   
  
  
  
  46.             //監(jiān)聽(tīng)播放錯(cuò)誤
    47. 
   
  
  
  
  47.             player.setErrorListener(
    48. 
   
  
  
  
  48.                     (errorType, errorCode) -> {
    49. 
   
  
  
  
  49.                         ToastDialog toast = new ToastDialog(getContext());
    50. 
   
  
  
  
  50.                         switch (errorType) {
    51. 
   
  
  
  
  51.                             case HmPlayerAdapter.ERROR_LOADING_RESOURCE:
    52. 
   
  
  
  
  52.                                 toast.setText(
    53. 
   
  
  
  
  53.                                         AppUtil.getStringResource(
    54. 
   
  
  
  
  54.                                                 getContext(), ResourceTable.String_media_file_loading_error));
    55. 
   
  
  
  
  55.                                 break;
    56. 
   
  
  
  
  56.                             case HmPlayerAdapter.ERROR_INVALID_OPERATION:
    57. 
   
  
  
  
  57.                                 toast.setText(
    58. 
   
  
  
  
  58.                                         AppUtil.getStringResource(
    59. 
   
  
  
  
  59.                                                 getContext(), ResourceTable.String_invalid_operation));
    60. 
   
  
  
  
  60.                                 break;
    61. 
   
  
  
  
  61.                             default:
    62. 
   
  
  
  
  62.                                 toast.setText(
    63. 
   
  
  
  
  63.                                         AppUtil.getStringResource(
    64. 
   
  
  
  
  64.                                                 getContext(), ResourceTable.String_undefined_error_type));
    65. 
   
  
  
  
  65.                                 break;
    66. 
   
  
  
  
  66.                         }
    67. 
   
  
  
  
  67.                         getUITaskDispatcher().asyncDispatch(toast::show);
    68. 
   
  
  
  
  68.                     });
    69. 
   
  
  
  
  69.         }
    70. 
   
  
  
  
  70.         //添加核心組件,播放時(shí)間進(jìn)度滑塊
    71. 
   
  
  
  
  71.         addCoreComponent();
    72. 
   
  
  
  
  72.         //添加自定義組件
    73. 
   
  
  
  
  73.         addCustomComponent();
    74. 
   
  
  
  
  74.         HiLog.debug(LABEL, "initPlayer finish");
    75. 
   
  
  
  
  75.     }
    76. 
   
  
  
  
  76. }
    77.

2.實(shí)現(xiàn)一個(gè)視頻播放列表功能

2.1.頁(yè)面布局 ability_main.xml

使用了DirectionalLayout布局組件,還有ScrollView和ListContainer組件

  
 
 
 
    
   
  
  
  
    2. 
   
  
  
  
  2. 
   
  
  
  
  3.     xmlns:ohos="http://schemas.huawei.com/res/ohos"
    4. 
   
  
  
  
  4.     ohos:id="$+id:ability_main_root"
    5. 
   
  
  
  
  5.     ohos:height="match_parent"
    6. 
   
  
  
  
  6.     ohos:width="match_parent"
    7. 
   
  
  
  
  7.     ohos:orientation="vertical">
    8. 
   
  
  
  
  8. 
   
  
  
  
  9.     
   
  
  
  
  10.         ohos:id="$+id:ability_main_titlebar"
    11. 
   
  
  
  
  11.         ohos:height="match_content"
    12. 
   
  
  
  
  12.         ohos:width="match_parent"
    13. 
   
  
  
  
  13.         ohos:background_element="#B0B0B0"
    14. 
   
  
  
  
  14.         ohos:orientation="horizontal"
    15. 
   
  
  
  
  15.         ohos:padding="10vp">
    16. 
   
  
  
  
  16. 
   
  
  
  
  17.         
   
  
  
  
  18.             ohos:height="match_parent"
    19. 
   
  
  
  
  19.             ohos:width="match_content"
    20. 
   
  
  
  
  20.             ohos:weight="1">
    21. 
   
  
  
  
  21. 
   
  
  
  
  22.             
   
  
  
  
  23.                 ohos:id="$+id:tag_favorite"
    24. 
   
  
  
  
  24.                 ohos:height="match_content"
    25. 
   
  
  
  
  25.                 ohos:width="match_parent"
    26. 
   
  
  
  
  26.                 ohos:text="關(guān)注"
    27. 
   
  
  
  
  27.                 ohos:text_size="$float:normal_text_size_15"
    28. 
   
  
  
  
  28.                 />
    29. 
   
  
  
  
  29.         
    30. 
   
  
  
  
  30. 
   
  
  
  
  31.         
   
  
  
  
  32.             ohos:height="match_content"
    33. 
   
  
  
  
  33.             ohos:width="match_content"
    34. 
   
  
  
  
  34.             ohos:weight="1">
    35. 
   
  
  
  
  35. 
   
  
  
  
  36.             
   
  
  
  
  37.                 ohos:id="$+id:tag_support"
    38. 
   
  
  
  
  38.                 ohos:height="match_content"
    39. 
   
  
  
  
  39.                 ohos:width="match_content"
    40. 
   
  
  
  
  40.                 ohos:text="推薦"
    41. 
   
  
  
  
  41.                 ohos:text_size="$float:normal_text_size_15"
    42. 
   
  
  
  
  42.                 />
    43. 
   
  
  
  
  43.         
    44. 
   
  
  
  
  44. 
   
  
  
  
  45.         
   
  
  
  
  46.             ohos:height="match_content"
    47. 
   
  
  
  
  47.             ohos:width="match_content"
    48. 
   
  
  
  
  48.             ohos:weight="1">
    49. 
   
  
  
  
  49. 
   
  
  
  
  50.             
   
  
  
  
  51.                 ohos:id="$+id:tag_movie"
    52. 
   
  
  
  
  52.                 ohos:height="match_content"
    53. 
   
  
  
  
  53.                 ohos:width="match_content"
    54. 
   
  
  
  
  54.                 ohos:element_end="$id:favorite"
    55. 
   
  
  
  
  55.                 ohos:text="電影"
    56. 
   
  
  
  
  56.                 ohos:text_color="#1C6AE9"
    57. 
   
  
  
  
  57.                 ohos:text_size="$float:normal_text_size_15"
    58. 
   
  
  
  
  58.                 ohos:text_weight="600"/>
    59. 
   
  
  
  
  59. 
   
  
  
  
  60.             
   
  
  
  
  61.                 ohos:id="$+id:device_item_divider"
    62. 
   
  
  
  
  62.                 ohos:height="2vp"
    63. 
   
  
  
  
  63.                 ohos:width="30vp"
    64. 
   
  
  
  
  64.                 ohos:background_element="$graphic:list_divider"/>
    65. 
   
  
  
  
  65.         
    66. 
   
  
  
  
  66. 
   
  
  
  
  67.         
   
  
  
  
  68.             ohos:height="match_content"
    69. 
   
  
  
  
  69.             ohos:width="match_content"
    70. 
   
  
  
  
  70.             ohos:weight="1">
    71. 
   
  
  
  
  71. 
   
  
  
  
  72.             
   
  
  
  
  73.                 ohos:id="$+id:tag_live"
    74. 
   
  
  
  
  74.                 ohos:height="match_content"
    75. 
   
  
  
  
  75.                 ohos:width="match_parent"
    76. 
   
  
  
  
  76.                 ohos:text="直播"
    77. 
   
  
  
  
  77.                 ohos:text_size="$float:normal_text_size_15"
    78. 
   
  
  
  
  78.                 />
    79. 
   
  
  
  
  79.         
    80. 
   
  
  
  
  80. 
   
  
  
  
  81.         
   
  
  
  
  82.             ohos:height="match_content"
    83. 
   
  
  
  
  83.             ohos:width="match_content"
    84. 
   
  
  
  
  84.             ohos:weight="1">
    85. 
   
  
  
  
  85. 
   
  
  
  
  86.             
   
  
  
  
  87.                 ohos:id="$+id:tag_tv"
    88. 
   
  
  
  
  88.                 ohos:height="match_content"
    89. 
   
  
  
  
  89.                 ohos:width="match_parent"
    90. 
   
  
  
  
  90.                 ohos:text="電視"
    91. 
   
  
  
  
  91.                 ohos:text_size="$float:normal_text_size_15"
    92. 
   
  
  
  
  92.                 />
    93. 
   
  
  
  
  93.         
    94. 
   
  
  
  
  94. 
   
  
  
  
  95.     
    96. 
   
  
  
  
  96. 
   
  
  
  
  97.     
   
  
  
  
  98.         ohos:height="match_parent"
    99. 
   
  
  
  
  99.         ohos:width="match_parent"
    100. 
   
  
  
  
  100.         ohos:id="$+id:video_list_scroll" >
    101. 
   
  
  
  
  101. 
   
  
  
  
  102.         
   
  
  
  
  103.             ohos:id="$+id:videos_container"
    104. 
   
  
  
  
  104.             ohos:height="match_parent"
    105. 
   
  
  
  
  105.             ohos:width="match_parent">
    106. 
   
  
  
  
  106. 
   
  
  
  
  107.         
    108. 
   
  
  
  
  108.     
    109. 
   
  
  
  
  109.

2.2.Java代碼

申請(qǐng)用戶敏感權(quán)限授權(quán) MainAbility.java

  
 
 
 
    
   
  
  
  
  1. /**
    2. 
   
  
  
  
  2.  * Entry to the main interface of the program
    3. 
   
  
  
  
  3.  */
    4. 
   
  
  
  
  4. public class MainAbility extends Ability {
    5. 
   
  
  
  
  5.     private static final int REQUEST_CODE = 1;
    6. 
   
  
  
  
  6. 
   
  
  
  
  7.     //讀寫(xiě)媒體權(quán)限
    8. 
   
  
  
  
  8.     private final String[] permissionLists
    9. 
   
  
  
  
  9.             = new String[]{"ohos.permission.READ_MEDIA", "ohos.permission.WRITE_MEDIA"};
    10. 
   
  
  
  
  10. 
   
  
  
  
  11.     @Override
    12. 
   
  
  
  
  12.     public void onStart(Intent intent) {
    13. 
   
  
  
  
  13.         super.onStart(intent);
    14. 
   
  
  
  
  14.         super.setUIContent(ResourceTable.Layout_ability_main);
    15. 
   
  
  
  
  15.         super.setMainRoute(MainAbilitySlice.class.getName());
    16. 
   
  
  
  
  16. 
   
  
  
  
  17.         //申請(qǐng)授權(quán)
    18. 
   
  
  
  
  18.         verifyPermissions();
    19. 
   
  
  
  
  19.     }
    20. 
   
  
  
  
  20.     private void verifyPermissions() {
    21. 
   
  
  
  
  21.         for (String permissionList : permissionLists) {
    22. 
   
  
  
  
  22.             int result = verifySelfPermission(permissionList);
    23. 
   
  
  
  
  23.             if (result != IBundleManager.PERMISSION_GRANTED) {
    24. 
   
  
  
  
  24.                 requestPermissionsFromUser(permissionLists, REQUEST_CODE);
    25. 
   
  
  
  
  25.             }
    26. 
   
  
  
  
  26.         }
    27. 
   
  
  
  
  27.     }
    28. 
   
  
  
  
  28. ...
    29.

通過(guò)VideoInfoService讀取videos.json文件初始化視頻容器列表MainAbilitySlice.java

  
 
 
 
    
   
  
  
  
  1. public class MainAbilitySlice extends AbilitySlice {
    2. 
   
  
  
  
  2.     public static final HiLogLabel LABEL = new HiLogLabel(0, 0, "=>MainAbilitySlice");
    3. 
   
  
  
  
  3.     private VideoInfoService videoService;
    4. 
   
  
  
  
  4. 
   
  
  
  
  5.     @Override
    6. 
   
  
  
  
  6.     protected void onStart(Intent intent) {
    7. 
   
  
  
  
  7.         super.onStart(intent);
    8. 
   
  
  
  
  8.         //加載視頻播放器頁(yè)面
    9. 
   
  
  
  
  9.         super.setUIContent(ResourceTable.Layout_ability_main);
    10. 
   
  
  
  
  10.         initVideoContainer();
    11. 
   
  
  
  
  11. 
   
  
  
  
  12.     }
    13. 
   
  
  
  
  13. 
   
  
  
  
  14.     /**
    15. 
   
  
  
  
  15.      * 模擬數(shù)據(jù)
    16. 
   
  
  
  
  16.      * 初始化視頻容器列表
    17. 
   
  
  
  
  17.      */
    18. 
   
  
  
  
  18.     private void initVideoContainer() {
    19. 
   
  
  
  
  19.         HiLog.debug(LABEL, "initVideoContainer");
    20. 
   
  
  
  
  20.         List videos = new ArrayList<>();
    21. 
   
  
  
  
  21.         //獲取視頻信息服務(wù)
    22. 
   
  
  
  
  22.         videoService = new VideoInfoService(getContext());
    23. 
   
  
  
  
  23. 
   
  
  
  
  24.         for (int i = 0; i < 7; i++) {
    25. 
   
  
  
  
  25.             VideoModel video = new VideoModel();
    26. 
   
  
  
  
  26.             video.setComments(new Random().nextInt(1000));
    27. 
   
  
  
  
  27.             video.setFavorites(new Random().nextInt(1000));
    28. 
   
  
  
  
  28.             video.setGreats(new Random().nextInt(10000));
    29. 
   
  
  
  
  29.             VideoInfo videoInfo = videoService.getVideoInfoByIndex(i);
    30. 
   
  
  
  
  30.             videoInfo.setIndex(i);
    31. 
   
  
  
  
  31.             video.setVideoInfo(videoInfo);
    32. 
   
  
  
  
  32.             videos.add(video);
    33. 
   
  
  
  
  33.         }
    34. 
   
  
  
  
  34. 
   
  
  
  
  35.         ListContainer listContainer = (ListContainer) findComponentById(ResourceTable.Id_videos_container);
    36. 
   
  
  
  
  36.         //容器綁定數(shù)據(jù)提供程序
    37. 
   
  
  
  
  37.         VideoItemProvider provider = new VideoItemProvider(this, videos, this);
    38. 
   
  
  
  
  38.         listContainer.setItemProvider(provider);
    39. 
   
  
  
  
  39.     }
    40. 
   
  
  
  
  40. }
    41.

 視頻容器列表數(shù)據(jù)提供程序 VideoItemProvider.java

  
 
 
 
    
   
  
  
  
  1. public class VideoItemProvider extends BaseItemProvider {
    2. 
   
  
  
  
  2.     private static final HiLogLabel LABEL = new HiLogLabel(0, 0, "=>VideoItemProvider");
    3. 
   
  
  
  
  3.     private final Context context;
    4. 
   
  
  
  
  4.     private final List list;
    5. 
   
  
  
  
  5.     private AbilitySlice abilitySlice;
    6. 
   
  
  
  
  6.     //當(dāng)前播放視頻分辨率索引
    7. 
   
  
  
  
  7.     private int currentPlayingResolutionIndex = 0;
    8. 
   
  
  
  
  8. 
   
  
  
  
  9.     /**
    10. 
   
  
  
  
  10.      * Initialization
    11. 
   
  
  
  
  11.      */
    12. 
   
  
  
  
  12.     public VideoItemProvider(Context context, List list, AbilitySlice abilitySlice) {
    13. 
   
  
  
  
  13.         HiLog.debug(LABEL, "VideoItemProvider");
    14. 
   
  
  
  
  14.         this.context = context;
    15. 
   
  
  
  
  15.         this.list = list;
    16. 
   
  
  
  
  16.         this.abilitySlice = abilitySlice;
    17. 
   
  
  
  
  17.     }
    18. 
   
  
  
  
  18. 
   
  
  
  
  19.     public Context getContext() {
    20. 
   
  
  
  
  20.         return context;
    21. 
   
  
  
  
  21.     }
    22. 
   
  
  
  
  22. 
   
  
  
  
  23.     @Override
    24. 
   
  
  
  
  24.     public int getCount() {
    25. 
   
  
  
  
  25.         return list == null ? 0 : list.size();
    26. 
   
  
  
  
  26.     }
    27. 
   
  
  
  
  27. 
   
  
  
  
  28.     @Override
    29. 
   
  
  
  
  29.     public Object getItem(int position) {
    30. 
   
  
  
  
  30.         if (list != null && position >= 0 && position < list.size()) {
    31. 
   
  
  
  
  31.             return list.get(position);
    32. 
   
  
  
  
  32.         }
    33. 
   
  
  
  
  33.         return new VideoModel();
    34. 
   
  
  
  
  34.     }
    35. 
   
  
  
  
  35. 
   
  
  
  
  36.                                                  
    
                                                標(biāo)題名稱：DistributedVideoPlayer分布式視頻播放器(一)                                                
    
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