本文介绍了无法为Intent Android打开pdf文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我彻底检查了pdf文件是否在/storage/emulated/0/Download/Abcd.pdf"但无法故意打开它.

I thoroughly checked that pdf file is in/storage/emulated/0/Download/Abcd.pdf"but can't open it with intent.

我在各种查看器中打开了它,有的哦,这会导致错误:无法打开文件".Microsoft word说:检查设备中的文件,但是当我在android的文件系统中的文件目录中打开 Abcd.pdf 文件时,它打开得很好.

I opened it in various viewers and some oh them result in a error: "can't open file". Microsoft word says: check file in the device, but Abcd.pdf file is opened well when I opened it in file directory in file system of android.

我设置的路线错误吗?

AndroidManifest.xml

AndroidManifest.xml

<provider
        android:authorities="${applicationId}.provider"
        android:name="android.support.v4.content.FileProvider"
        android:exported="false"
        android:grantUriPermissions="true">

        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths"/>
    </provider>

MainActivity.Java

MainActivity.Java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Intent intent=new Intent();

    File mypath=new File( Environment.getExternalStorageDirectory().getAbsolutePath() + "/Download/","Abcd.pdf");

    Log.e("download",mypath.getAbsolutePath());
      //this log says : /storage/emulated/0/Download/Abcd.pdf
    Uri pdfUri = FileProvider.getUriForFile(getApplicationContext(), getApplicationContext().getPackageName() + ".provider", mypath);



    Log.e("download",mypath.exists()+"");
    if (mypath.exists()) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            Log.e("download","result : "+pdfUri.getPath());
            intent = new Intent(Intent.ACTION_VIEW);
            intent.setType("application/pdf");
            intent.putExtra(MediaStore.EXTRA_OUTPUT, pdfUri);
        }else{

        }
        intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);


        try {
            startActivity(intent);
        }
        catch (ActivityNotFoundException e) {
            Log.e("error","error"+e);
        }
    }
}

res/xml/provider_paths.xml

res/xml/provider_paths.xml

<?xml version="1.0" encoding="utf-8"?>
 <paths xmlns:android="http://schemas.android.com/apk/res/android">
 <external-path
name="storage/emulated/0"
path="."/>
</paths>

推荐答案

我正在使用此功能:

public void openPdf(LocalFile magazine) {

        if (BuildConfig.DEBUG)
            Log.d(TAG, "openPdf() called with: magazine = [" + magazine + "]");

        Intent intent = new Intent(Intent.ACTION_VIEW);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {

            File file = new File(Uri.parse(magazine.getPath()).getPath());
            Uri uri = FileProvider.getUriForFile(getContext(),
                getContext().getApplicationContext().getPackageName() + ".provider", file);
            intent.setDataAndType(uri, "application/pdf");
            intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
            intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

        } else {
            intent.setDataAndType(Uri.parse(magazine.getPath()), "application/pdf");
        }

        try {
            startActivity(intent);
        } catch (Throwable t) {
            t.printStackTrace();
            //attemptInstallViewer();
        }

    }

这对我来说很好.

这篇关于无法为Intent Android打开pdf文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-27 00:40
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