The article directories

    • After downloading the PDF, write the responseBody locally
      • Android10 below
      • Android 10 above write
    • Use Tencent TBS kernel to open local PDF files directly in webView
      • Open the local PDF file directly
      • Implicitly call a third-party application to open a PDF

After downloading the PDF, write the responseBody locally

Val responseBody = downLoadResponseBodyBean. Respone logE (" received responseBody. Length = = ${responseBody? .contentLength()}") if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) { thread { responseBody? .let { writePDF(it) } }.start() } else{ GlobalScope.launch { responseBody? .let { writePDFQ(it) } } }Copy the code

Android10 below

fun writePDF(body: ResponseBody): Boolean { var length = 0L var result = 0 return try { val files = File(PDF_PATH) if (! files.exists()) { files.mkdirs() } val futureStudioIconFile = File(PDF_PATH_NAME) var inputStream: InputStream? = null var outputStream: OutputStream? = null try { val fileReader = ByteArray(1024) val fileSize: Long = body.contentLength() inputStream = body.byteStream() outputStream = FileOutputStream(futureStudioIconFile) while (true) { val read: Int = inputStream.read(fileReader) if (read == -1) { break } outputStream.write(fileReader,0,read) length += read result = (100*length/fileSize).toint () if(result>0){logE(" ${result}%") ownerDashBoardModel.downLoadPDFProgress.postValue(result) } } outputStream.flush() true } catch (e: IOException) {logE(" Network error ${e.printStackTrace()}") false} finally {try {inputStream!! .close() outputStream!! .close() } catch(e: Exception) { e.printStackTrace() } } } catch (e: IOException) { logE(e.message) false } }Copy the code

Android 10 above write

@RequiresApi(Build.VERSION_CODES.Q) private suspend fun writePDFQ(responseBody: ResponseBody) { var length = 0L withContext(Dispatchers.IO){ var result = 0 val fileSize: Long = responseBody. ContentLength () logE (" file size: $fileSize") try { val inputStream = responseBody.byteStream() val bis = BufferedInputStream(inputStream) val values = ContentValues() values.put(MediaStore.MediaColumns.DISPLAY_NAME, fileName) values.put(MediaStore.Downloads.MIME_TYPE, "application/pdf") values.put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_DOWNLOADS) var uri = contentResolver.insert(MediaStore.Downloads.EXTERNAL_CONTENT_URI, values) if (uri ! = null) { val outputStream = contentResolver.openOutputStream(uri) if (outputStream ! = null) { val bos = BufferedOutputStream(outputStream) val buffer = ByteArray(1024) var bytes = bis.read(buffer) while (bytes >= 0) { bos.write(buffer, 0 , bytes) bos.flush() bytes = bis.read(buffer) length += bytes result = (101*length/fileSize).toInt() if(result in 1.. 100){logE("Q monitor PDF file writing progress: ${result}%") ownerDashBoardModel.downLoadPDFProgress.postValue(result) } } bos.close() } }else{ Toast.makeText(context, $fileName write Exception ", toast.length_short).show()} bis.close()}catch (e: Exception) {e.printStackTrace()}}Copy the code
  • Android10 below write SD card root directory, you can create folder
  • Android10 and above are placed in the public directory Download directory, and in the root directory. Otherwise, you will have Permission denied when you open the file using an implicit third-party APP

Use Tencent TBS kernel to open local PDF files directly in webView

  • At present the latest version of the API ‘com. Tencent. TBS. TBSSDK: SDK: 43903’ support through QQ browser to open the PDF
  • If aiming at 10 or higher Android platform, in the application, please list file requestLegacyExternalStorage value is set to true:
<manifest ... >
      <!-- This attribute is "false" by default on apps targeting
           Android 10 or higher. -->
      <application android:requestLegacyExternalStorage="true" ... >
        ...
      </application>
</manifest>
    
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<! <RelativeLayout Android :id="@+id/rl_pdf" Android :layout_width="match_parent" android:layout_height="match_parent"> <com.beans.base.widget.TBSWebView android:id="@+id/webView" android:layout_width="match_parent" android:layout_height="match_parent"> </com.beans.base.widget.TBSWebView> </RelativeLayout>Copy the code

Open the local PDF file directly

var tbsReaderView:TbsReaderView? Private fun openPDF() {var bundle = bundle () if(isAndroidQ()){bundle.putString("filePath", "/storage/emulated/0/Download/wey.pdf") bundle.putString("tempPath", context.cacheDir? .path+"/wey.pdf") }else{ bundle.putString("filePath", getPdfPath()) bundle.putString("tempPath", Environment.getExternalStorageDirectory().path) } var result = tbsReaderView!! .preOpen(parseFormat(parseName()),false) if (result){ tbsReaderView!! .openFile(bundle) }else{ QbSdk.openFileReader(this,"/storage/emulated/0/Download/wey.pdf",null, ValueCallback {logE(" PDF $it")})}}Copy the code
  private fun parseFormat( fileName:String):String{
       return fileName.substring(fileName.lastIndexOf(".") + 1);
    }
  
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 private fun parseName():String{
        return  PDF_PATH_NAME.substring(PDF_PATH_NAME.lastIndexOf("/")+1)
    }
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Implicitly call a third-party application to open a PDF

// Save path of PDF file val PDF_PATH: String = Environment.getExternalStorageDirectory().getPath().toString() + "/wey/" val PDF_PATH_NAME: String = "${PDF_PATH}wey.pdf" var file :File if(Build.VERSION.SDK_INT < Build.VERSION_CODES.Q){ file= File(PDF_PATH_NAME) }else{ file = File("/storage/emulated/0/Download/", fileName) } if(! File.exists ()) {toastutils.s (this," file not found ") return@OnClickListener} val intent = intent (intent.action_view) var URI :Uri if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N ){ uri = Uri.parse(PDF_PATH_NAME) if( Build.VERSION.SDK_INT >=Build.VERSION_CODES.Q){ uri = Uri.parse(PDF_PATH_Q_NAME) } }else{ uri = Uri.fromFile(file) } intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK) intent.setDataAndType(uri, "application/pdf") var componentName:ComponentName = intent.resolveActivity(packageManager) if(componentName == null){ Toastutils.s (this," $componentName") return@OnClickListener}else{logE(" componentName")} try {toastutils.s (this," $componentName") return@OnClickListener}else{logE(" componentName")} try { startActivityForResult(intent,PDF_JUMP_CODE) } catch(e: ActivityNotFoundException) { Log.e("URLSpan","Activity was not found for intent, $intent") }Copy the code
override fun onDestroy() { super.onDestroy() mBinding.webView.clearCache(true) mBinding.webView.clearFormData() mBinding.webView.destroy() tbsReaderView!! .onStop() }Copy the code