尝试打开pdf文件Android

Question

I'm facing this error:

E/AndroidRuntime: java.lang.IllegalArgumentException: Failed to find configured root that contains /data/data/com.mobgen.androidinterviewtest/files/LaFerrari.pdf
E/AndroidRuntime:     at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:678)
E/AndroidRuntime:     at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:377)
E/AndroidRuntime:     at com.mobgen.interview.SingleCarActivity$1.onClick(SingleCarActivity.java:92)

It's because of this line of code:

Uri uri = FileProvider.getUriForFile(SingleCarActivity.this, "be.myapplication", file);

I have followed the resources that I had found: http://developer.android.com/reference/android/support/v4/content/FileProvider.html

Open file in cache directory with ACTION_VIEW

How to use support FileProvider for sharing content to other apps?

However I still couldn't manage to fix the error that I'm having.

Below you can see my code:

SingleCarActivity.java:

File file = new File(getFilesDir(), pdf); //pdf contains "LaFerrari.pdf"
Uri uri = FileProvider.getUriForFile(SingleCarActivity.this, "be.myapplication", file);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setDataAndType(uri, "application/pdf");
startActivity(intent);

AndroidManifest.xml:

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="be.myapplication"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_paths" />
</provider>

file_paths.xml:

<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <files-path name="my_pdf" path="assets/"/>
</paths>

Below you can see a screenshot of how my project structure looks like: Link: http://i.imgur.com/4dbhcKF.png

Answer 1

FileProvider cannot serve assets directly, as assets are not files. Your primary choices are:

1. Copy the asset to a file, in a location that you have configured for FileProvider . I demonstrate that sort of FileProvider configuration in this sample app , but the answers to the question from your comment do the basics of copying the asset to a file.

2. Use my StreamProvider , which can serve assets directly, without having to make a copy.