在HarmonyOS开发中 使用DocumentViewPicker有没有完整的示例 ?

DocumentViewPicker有没有完整的示例,没看明白源文件如何设置

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在HarmonyOS(华为鸿蒙系统)开发中,DocumentViewPicker 是一个用于从设备中选择文档的组件,类似于其他平台上的文件选择器。然而,由于HarmonyOS的API和框架仍在不断更新中,且文档和示例可能不如其他更成熟的平台那样丰富,直接找到一个完整的DocumentViewPicker示例可能有些挑战。不过,我可以给你一个基本的示例框架和设置方法,帮助你开始使用DocumentViewPicker

基本步骤

  1. 在布局文件中添加DocumentViewPicker

    在你的XML布局文件中,添加DocumentViewPicker组件。注意,这里假设你已经有一个基本的HarmonyOS项目结构。

    <?xml version="1.0" encoding="utf-8"?>
    <DirectionalLayout
        xmlns:ohos="http://schemas.huawei.com/res/ohos"
        ohos:height="match_parent"
        ohos:width="match_parent"
        ohos:orientation="vertical">
    
        <DocumentViewPicker
            ohos:id="$+id:documentViewPicker"
            ohos:height="match_content"
            ohos:width="match_parent"
            ohos:text_size="16fp"
            ohos:text_alignment="center"
            ohos:normal_text_color="#000000"
            ohos:selected_text_color="#FF0000"
            ohos:file_types="*.txt,*.pdf"/> <!-- 指定文件类型 -->
    
    </DirectionalLayout>

注意:file_types属性用于指定可接受的文件类型,格式为*.extension,多个类型之间用逗号分隔。

  1. 在Java/Kotlin代码中设置监听器

    在你的页面(Page)或组件(Component)的Java或Kotlin代码中,设置DocumentViewPicker的监听器以处理文件选择事件。

    public class MyPage extends Component {
        private DocumentViewPicker documentViewPicker;
    
        @Override
        public void onStart(Intent intent) {
            super.onStart(intent);
            setUIContent(ResourceTable.Layout_your_layout);
            documentViewPicker = (DocumentViewPicker) findComponentById(ResourceTable.Id_documentViewPicker);
            documentViewPicker.setPickerListener(new DocumentViewPicker.PickerListener() {
                @Override
                public void onSelected(List<String> files) {
                    // 处理选中的文件
                    if (files != null && !files.isEmpty()) {
                        for (String file : files) {
                            // 例如:显示文件路径
                            HiLog.info(LABEL, "Selected file: " + file);
                        }
                    }
                }
    
                @Override
                public void onCancel() {
                    // 用户取消选择
                    HiLog.info(LABEL, "Selection cancelled");
                }
    
                @Override
                public void onError(int errorCode, String errorMessage) {
                    // 错误处理
                    HiLog.error(LABEL, "Error: " + errorMessage);
                }
            });
        }
    }

注意:ResourceTable.Layout_your_layoutResourceTable.Id_documentViewPicker 需要替换为你的实际资源ID。

注意事项

  • 确保你的应用具有读取存储的权限,尤其是在Android设备上。
  • DocumentViewPicker的具体API和功能可能会随着HarmonyOS版本的更新而发生变化,请参考最新的官方文档。
  • 如果你的项目是基于JavaScript(JS)的,那么设置方式会有所不同,但基本概念是相似的。

这个示例提供了一个基本的框架,你可以根据具体需求进行调整和扩展。

1 个回答

请参考:

async function example07() { 
  try { 
    let DocumentSelectOptions = new picker.DocumentSelectOptions(); 
    let documentPicker = new picker.DocumentViewPicker(); 
    documentPicker.select(DocumentSelectOptions).then((DocumentSelectResult: Array<string>) => { 
      console.info('DocumentViewPicker.select successfully, DocumentSelectResult uri: ' + JSON.stringify(DocumentSelectResult)); 
    }).catch((err: BusinessError) => { 
      console.error('DocumentViewPicker.select failed with err: ' + JSON.stringify(err)); 
    }); 
  } catch (error) { 
    let err: BusinessError = error as BusinessError; 
    console.error('DocumentViewPicker failed with err: ' + JSON.stringify(err)); 
  } 
} 
 
 
async function example08() { 
  try { 
    let DocumentSelectOptions = new picker.DocumentSelectOptions(); 
    let documentPicker = new picker.DocumentViewPicker(); 
    documentPicker.select(DocumentSelectOptions, (err: BusinessError, DocumentSelectResult: Array<string>) => { 
      if (err) { 
        console.error('DocumentViewPicker.select failed with err: ' + JSON.stringify(err)); 
        return; 
      } 
      console.info('DocumentViewPicker.select successfully, DocumentSelectResult uri: ' + JSON.stringify(DocumentSelectResult)); 
    }); 
  } catch (error) { 
    let err: BusinessError = error as BusinessError; 
    console.error('DocumentViewPicker failed with err: ' + JSON.stringify(err)); 
  } 
} 
 
async function example09() { 
  try { 
    let documentPicker = new picker.DocumentViewPicker(); 
    documentPicker.select((err: BusinessError, DocumentSelectResult: Array<string>) => { 
      if (err) { 
        console.error('DocumentViewPicker.select failed with err: ' + JSON.stringify(err)); 
        return; 
      } 
      console.info('DocumentViewPicker.select successfully, DocumentSelectResult uri: ' + JSON.stringify(DocumentSelectResult)); 
    }); 
  } catch (error) { 
    let err: BusinessError = error as BusinessError; 
    console.error('DocumentViewPicker failed with err: ' + JSON.stringify(err)); 
  } 
} 
 
async function example10() { 
  try { 
    let DocumentSaveOptions = new picker.DocumentSaveOptions(); 
    DocumentSaveOptions.newFileNames = ['DocumentViewPicker01.txt']; 
    let documentPicker = new picker.DocumentViewPicker(); 
    documentPicker.save(DocumentSaveOptions).then((DocumentSaveResult: Array<string>) => { 
      console.info('DocumentViewPicker.save successfully, DocumentSaveResult uri: ' + JSON.stringify(DocumentSaveResult)); 
    }).catch((err: BusinessError) => { 
      console.error('DocumentViewPicker.save failed with err: ' + JSON.stringify(err)); 
    }); 
  } catch (error) { 
    let err: BusinessError = error as BusinessError; 
    console.error('DocumentViewPicker failed with err: ' + JSON.stringify(err)); 
  } 
} 
 
 
async function example11() { 
  try { 
    let DocumentSaveOptions = new picker.DocumentSaveOptions(); 
    DocumentSaveOptions.newFileNames = ['DocumentViewPicker02.txt']; 
    let documentPicker = new picker.DocumentViewPicker(); 
    documentPicker.save(DocumentSaveOptions, (err: BusinessError, DocumentSaveResult: Array<string>) => { 
      if (err) { 
        console.error('DocumentViewPicker.save failed with err: ' + JSON.stringify(err)); 
        return; 
      } 
      console.info('DocumentViewPicker.save successfully, DocumentSaveResult uri: ' + JSON.stringify(DocumentSaveResult)); 
    }); 
  } catch (error) { 
    let err: BusinessError = error as BusinessError; 
    console.error('DocumentViewPicker failed with err: ' + JSON.stringify(err)); 
  } 
} 
 
async function example12() { 
  try { 
    let documentPicker = new picker.DocumentViewPicker(); 
    documentPicker.save((err: BusinessError, DocumentSaveResult: Array<string>) => { 
      if (err) { 
        console.error('DocumentViewPicker.save failed with err: ' + JSON.stringify(err)); 
        return; 
      } 
      console.info('DocumentViewPicker.save successfully, DocumentSaveResult uri: ' + JSON.stringify(DocumentSaveResult)); 
    }); 
  } catch (error) { 
    let err: BusinessError = error as BusinessError; 
    console.error('DocumentViewPicke')
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