android - 如何读取 Assets 文件夹中的 .pdf 文件

Question

File file = new File("android.resource://com.baltech.PdfReader/assets/raw/"+filename);

                    if (file.exists()) {
                    Uri targetUri = Uri.fromFile(file);
                    Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.setDataAndType(targetUri, "application/pdf");
                        try {
                            startActivity(intent);
                        } 
                        catch (ActivityNotFoundException e) {
                            Toast.makeText(PdfReaderActivity.this, "No Application Available to View PDF", Toast.LENGTH_SHORT).show();
                        }

我想阅读 Assets 文件夹中的 .pdf 文件。我必须在文件名中提供什么路径。请帮助。谢谢

Answer 1

我不确定您是否已经得到答案，看起来很老，但这对我有用。

//you need to copy the input stream to a new file, so store it elsewhere
//this stores it to the sdcard in a new folder "MyApp"
String filename = Environment.getExternalStorageDirectory().getAbsolutePath() + "/MyApp/solicitation_form.pdf";

AssetManager assetManager = getAssets();

try {
    InputStream pdfFileStream = assetManager.open("solicitation_form.pdf");
    CreateFileFromInputStream(pdfFileStream, filename);

} catch (IOException e1) {
    e1.printStackTrace();
}

File pdfFile = new File(filename); 

CreateFileFromInputStream函数如下

public void CreateFileFromInputStream(InputStream inStream, String path) throws IOException {
    // write the inputStream to a FileOutputStream
    OutputStream out = new FileOutputStream(new File(path));

    int read = 0;
    byte[] bytes = new byte[1024];

    while ((read = inStream.read(bytes)) != -1) {
        out.write(bytes, 0, read);
    }

    inStream.close();
    out.flush();
    out.close();

}

真心希望这对阅读本文的其他人有所帮助。