PDF打印视图问题

我尝试过两种方式

1）正在创建一个WebView并加载我的pdf文档，我的应用程序几乎完成了打印过程的一部分。但在这方面我面临着打印问题。

它没有完整的 A4 表格视图。任何人都可以帮忙吗？我使用了以下代码，

    public void createWebPagePrint(WebView webView) {
    PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
    PrintDocumentAdapter printAdapter = null;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        printAdapter = webView.createPrintDocumentAdapter();
        String jobName = getString(R.string.app_name) + " Document";
        PrintAttributes.Builder builder = null;
        builder = new PrintAttributes.Builder();
        builder.setMediaSize(PrintAttributes.MediaSize.ISO_A4);
        PrintJob printJob = null;
        printJob = printManager.print(jobName, printAdapter, builder.build());
        if (printJob.isCompleted()) {
            Toast.makeText(getApplicationContext(), "Print Complete", Toast.LENGTH_LONG).show();
        } else if (printJob.isFailed()) {
            Toast.makeText(getApplicationContext(), "Print Failed", Toast.LENGTH_LONG).show();
        }
        builder.setMediaSize(PrintAttributes.MediaSize.ISO_A4)
                .setResolution(new PrintAttributes.Resolution("id", Context.PRINT_SERVICE, 1024, 720))
                .setColorMode(PrintAttributes.COLOR_MODE_COLOR).
                setMinMargins(PrintAttributes.Margins.NO_MARGINS).build();
    }


}

Note:

https://developer.android.com/training/printing/html-docs.html

• 有时加载 pdf 时不显示。

2）我尝试使用 pdf view lib ，

 compile 'com.github.barteksc:android-pdf-viewer:2.8.2'

But that time am getting better view compared to webview. The problem is only visible view is drawing on canvas.The print view is not clear.Its not readable.I have given the page count, So according to the page count its repeating the pages but print view is same as in first page.The following view am getting while printing.

这是我的示例代码，

code

如果有人知道请帮助我。

上述过程非常困难。即使我没有找到解决方案。之后我想出了一个解决方案，它对我来说非常有效。 1）要查看PDF文件，无需加载webview或外部pdf库。只需下载pdf文件并使用默认pdf查看器查看它。我使用的以下代码，

要下载文件，

    import android.app.Activity;
import android.util.Log;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class FileDownloader {
    private static final int  MEGABYTE = 1024 * 1024;

    public static void downloadFile(String fileUrl, File directory, Activity activity){
        try {

            URL url = new URL(fileUrl);
            HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();
            //urlConnection.setRequestMethod("GET");
            //urlConnection.setDoOutput(true);
            urlConnection.connect();
            InputStream inputStream = urlConnection.getInputStream();
            FileOutputStream fileOutputStream = new FileOutputStream(directory);
            int totalSize = urlConnection.getContentLength();

            byte[] buffer = new byte[MEGABYTE];
            int bufferLength = 0;
            while((bufferLength = inputStream.read(buffer))>0 ){
                fileOutputStream.write(buffer, 0, bufferLength);
            }
            fileOutputStream.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

private class DownloadFile extends AsyncTask<String, Void, Void> {

    @Override
    protected Void doInBackground(String... strings) {
        String fileUrl = strings[0];
        String fileName = strings[1];
        String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
        File folder = new File(extStorageDirectory, "Test");
        folder.mkdir();
        File pdfFile = new File(folder, fileName);
        try {
            pdfFile.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        FileDownloader.downloadFile(fileUrl, pdfFile,InventoryStockActivity.this);
        return null;
    }
}
public void download(String viewUrl) {
    new DownloadFile().execute(viewUrl, "Test.pdf");
    Log.d("Download complete", "----------");
}

查看 pdf 文件；

public void view() {
    File pdfFile = new File(Environment.getExternalStorageDirectory() + "/Test/" + "Test.pdf");
    Uri path = Uri.fromFile(pdfFile);
    Intent pdfIntent = new Intent(Intent.ACTION_VIEW);
    pdfIntent.setDataAndType(path, "application/pdf");
    pdfIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    try {
        startActivity(pdfIntent);
    } catch (ActivityNotFoundException e) {
        Toast.makeText(InventoryStockActivity.this, "No Application available to view PDF", Toast.LENGTH_SHORT).show();
    }
}

明显地，

  <uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>

当它打开默认的 pdf 查看器时，将会出现打印菜单。只需从那里打印即可。