如何在我的Android应用程序中阅读pdf？

Question

我正在申请要求打开pdf.

我在资产文件夹中也有一些pdf,所以我无法直接在webview中打开它.

默认情况下,android不支持pdf.

有没有适用于android的API(MuPdf除外)？

我的设备没有安装任何pdf阅读器,因此ACTION VIEW对我没用

以下不工作.......

在Android上使用Java渲染PDF文件

在应用程序中打开资产文件pdf

你可以建议我任何好的api ...

提前致谢...

Answer 1

我只是使用PdfViewer.jar(使用蓝色按钮下载)并制作如下代码.

First.java

@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    File images = Environment.getExternalStorageDirectory();
    imagelist = images.listFiles(new FilenameFilter()
    {  
            public boolean accept(File dir, String name)  
            {  
                    return ((name.endsWith(".pdf")));
            }  
    }); 
    pdflist = new String[imagelist.length]; 
    for(int i = 0;i<imagelist.length;i++)
    {
            pdflist[i] = imagelist[i].getName();
    }
    this.setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, pdflist));
}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) 
{
        super.onListItemClick(l, v, position, id);
        String path = imagelist[(int)id].getAbsolutePath();
        openPdfIntent(path);
}

private void openPdfIntent(String path) 
{
    try
    {
      final Intent intent = new Intent(First.this, Second.class);
      intent.putExtra(PdfViewerActivity.EXTRA_PDFFILENAME, path);
      startActivity(intent);
    }
    catch (Exception e) 
    {
      e.printStackTrace();
    }
}

Second.java

public class Second extends PdfViewerActivity 
{

@Override
public void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
}

public int getPreviousPageImageResource() {
    return R.drawable.left_arrow;
}

public int getNextPageImageResource() {
    return R.drawable.right_arrow;
}

public int getZoomInImageResource() {
    return R.drawable.zoom_in;
}

public int getZoomOutImageResource() {
    return R.drawable.zoom_out;
}

public int getPdfPasswordLayoutResource() {
    return R.layout.pdf_file_password;
}

public int getPdfPageNumberResource() {
    return R.layout.dialog_pagenumber;
}

public int getPdfPasswordEditField() {
    return R.id.etPassword;
}

public int getPdfPasswordOkButton() {
    return R.id.btOK;
}

public int getPdfPasswordExitButton() {
    return R.id.btExit;
}

public int getPdfPageNumberEditField() {
    return R.id.pagenum_edit;
}
}

希望这对你有所帮助.试试这个.别忘了Second.java在清单中添加你的内容.在second.java您的drawables中添加一些drawables,无论它需要什么.并且,请参阅GitHub中的示例

Answer 2

有些手机(如Nexus One)预装了Quickoffice版本,因此在将文件保存到SD卡后,可能就像发送相应的Intent一样简单.

public class OpenPdf extends Activity { 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 

        Button button = (Button) findViewById(R.id.OpenPdfButton); 
        button.setOnClickListener(new View.OnClickListener() { 
            @Override 
            public void onClick(View v) { 
                File file = new File("/sdcard/example.pdf"); 

                if (file.exists()) { 
                    Uri path = Uri.fromFile(file); 
                    Intent intent = new Intent(Intent.ACTION_VIEW); 
                    intent.setDataAndType(path, "application/pdf"); 
                    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 

                    try { 
                        startActivity(intent); 
                    }  
                    catch (ActivityNotFoundException e) { 
                        Toast.makeText(OpenPdf.this,  
                            "No Application Available to View PDF",  
                            Toast.LENGTH_SHORT).show(); 
                    } 
                } 
            } 
        }); 
    } 
}