Android Share Images from Assets Folder

android share images from assets folder

Complementing what @intrepidis answered:

You will need override methods like example class above:

package com.android.example;

import android.content.ContentProvider;
import android.net.Uri;
import android.content.res.AssetFileDescriptor;
import android.content.res.AssetManager;
import java.io.FileNotFoundException;
import android.content.ContentValues;
import android.database.Cursor;
import java.io.IOException;
import android.os.CancellationSignal;

public class AssetsProvider extends ContentProvider
{

        @Override
        public AssetFileDescriptor openAssetFile( Uri uri, String mode ) throws FileNotFoundException
        {
                Log.v( TAG, "AssetsGetter: Open asset file" );
                AssetManager am = getContext( ).getAssets( );
                String file_name = uri.getLastPathSegment( );
                if( file_name == null )
                        throw new FileNotFoundException( );
                AssetFileDescriptor afd = null;
                try
                {
                        afd = am.openFd( file_name );
                }
                catch(IOException e)
                {
                        e.printStackTrace( );
                }
                return afd;//super.openAssetFile(uri, mode);
        }

        @Override
        public String getType( Uri p1 )
        {
                // TODO: Implement this method
                return null;
        }

        @Override
        public int delete( Uri p1, String p2, String[] p3 )
        {
                // TODO: Implement this method
                return 0;
        }

        @Override
        public Cursor query( Uri p1, String[] p2, String p3, String[] p4, String p5 )
        {
                // TODO: Implement this method
                return null;
        }

        @Override
        public Cursor query( Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder, CancellationSignal cancellationSignal )
        {
                // TODO: Implement this method
                return super.query( uri, projection, selection, selectionArgs, sortOrder, cancellationSignal );
        }

        @Override
        public Uri insert( Uri p1, ContentValues p2 )
        {
                // TODO: Implement this method
                return null;
        }

        @Override
        public boolean onCreate( )
        {
                // TODO: Implement this method
                return false;
        }

        @Override
        public int update( Uri p1, ContentValues p2, String p3, String[] p4 )
        {
                // TODO: Implement this method
                return 0;
        }
}

I needed to override two times the query method.
And add these lines above tag in your androidmanifest.xml:

<provider
  android:name="com.android.example.AssetsProvider"
  android:authorities="com.android.example"
  android:grantUriPermissions="true"
  android:exported="true" />

And with this, all work like a charm :D

Problems sharing an image from assets in Android

The main problem is that the Uri has to be parsed from a Filewith Uri.fromFile(File file) then everything works ok!

Adding images from assets folder in adapter

It must be setImageBitmap(bitmap) not setImageResource(bitmap)

How to use image in android:src= from assets folder instead of drawable

No it is not possible directly in XML although you can do it pragmatically.

AssetManager assetManager = getAssets();
ImageView imageView = (ImageView) findViewById(R.id.iv_image);
try {
    InputStream ims = assetManager.open("my_image.jpg");
    Drawable d = Drawable.createFromStream(ims, null);
    imageView.setImageDrawable(d);
} catch (IOException ex) {
   return;
}

How to set images from assets folder to list view?(using SimpleAdapter)

Simple Adapter can work only with IDs in drawable-folder or with Uri. But you can use ViewBinder to set image using setImageBitmap method.

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