HarmonyOS 图片资源选取

import common from '@ohos.app.ability.common'; 
import hilog from '@ohos.hilog'; 
import promptAction from '@ohos.promptAction'; 
 
const TAG: string = '[Page_Context]'; 
const DOMAIN_NUMBER: number = 0xFF00; 
@Entry 
@Component 
struct Page_Context { 
 
 private context = getContext(this) as common.UIAbilityContext; 
 
 build() { 
  ... 
  Button() 
   .onClick(() => { 
    let applicationContext = this.context.getApplicationContext(); 
    let cacheDir = applicationContext.cacheDir; 
    let tempDir = applicationContext.tempDir; 
    let filesDir = applicationContext.filesDir; 
    let databaseDir = applicationContext.databaseDir; 
    let bundleCodeDir = applicationContext.bundleCodeDir; 
    let distributedFilesDir = applicationContext.distributedFilesDir; 
    let preferencesDir = applicationContext.preferencesDir; 
    // 获取应用文件路径 
    let filePath = tempDir + 'test.txt'; 
    hilog.info(DOMAIN_NUMBER, TAG, `filePath: ${filePath}`); 
    if (filePath !== null) { 
     promptAction.showToast({ 
      message: filePath 
     }); 
    } 
   }) 
 } 
}