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‎android/build.gradle‎

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buildscript {
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repositories {
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mavenCentral()
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}
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dependencies {
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classpath 'com.android.tools.build:gradle:2.1.2'
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}
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}
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apply plugin: 'com.android.library'
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android {
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compileSdkVersion 'android-25'
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buildToolsVersion '25.0.1'
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defaultConfig {
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minSdkVersion 19
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targetSdkVersion 22
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFile getDefaultProguardFile('proguard-android.txt')
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}
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}
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}
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allprojects {
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repositories {
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mavenLocal()
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jcenter()
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maven {
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url "http://files.couchbase.com/maven2/"
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}
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}
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}
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dependencies {
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compile 'com.facebook.react:react-native:+'
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}

‎android/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.reactnativedocumentpicker"
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android:versionCode="1"
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android:versionName="1.0">
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</manifest>

‎android/src/main/java/com/reactnativedocumentpicker/DocumentPicker.java‎

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package com.reactnativedocumentpicker;
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import android.app.Activity;
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import android.content.ContentResolver;
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import android.content.Intent;
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import android.database.Cursor;
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import android.net.Uri;
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import android.os.Bundle;
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import android.provider.MediaStore;
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import android.provider.OpenableColumns;
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import android.util.Log;
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import android.webkit.MimeTypeMap;
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import com.facebook.react.bridge.ActivityEventListener;
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import com.facebook.react.bridge.Arguments;
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import com.facebook.react.bridge.Callback;
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import com.facebook.react.bridge.ReactApplicationContext;
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import com.facebook.react.bridge.ReactContextBaseJavaModule;
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import com.facebook.react.bridge.ReactMethod;
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import com.facebook.react.bridge.ReadableArray;
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import com.facebook.react.bridge.ReadableMap;
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import com.facebook.react.bridge.WritableMap;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.net.URL;
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import java.nio.channels.Channels;
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import java.nio.channels.ReadableByteChannel;
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/**
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* @see <a href="https://developer.android.com/guide/topics/providers/document-provider.html">android documentation</a>
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*/
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public class DocumentPicker extends ReactContextBaseJavaModule implements ActivityEventListener {
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private static final String NAME = "RNDocumentPicker";
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private static final int READ_REQUEST_CODE = 41;
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private static class Fields {
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//private static final String FILE_PATH = "filepath";
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private static final String FILE_SIZE = "fileSize";
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private static final String FILE_NAME = "fileName";
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private static final String TYPE = "type";
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}
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private Callback callback;
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public DocumentPicker(ReactApplicationContext reactContext) {
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super(reactContext);
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reactContext.addActivityEventListener(this);
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}
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@Override
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public String getName() {
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return NAME;
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}
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@ReactMethod
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public void show(ReadableMap args, Callback callback) {
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Intent intent;
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if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
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intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
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} else {
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intent = new Intent(Intent.ACTION_PICK);
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}
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intent.addCategory(Intent.CATEGORY_OPENABLE);
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if (!args.isNull("filetype")) {
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ReadableArray filetypes = args.getArray("filetype");
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if (filetypes.size() > 0) {
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intent.setType(filetypes.getString(0));
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}
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}
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this.callback = callback;
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getReactApplicationContext().startActivityForResult(intent, READ_REQUEST_CODE, Bundle.EMPTY);
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}
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// removed @Override temporarily just to get it working on RN0.33 and RN0.32 - will remove
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public void onActivityResult(Activity activity, int requestCode, int resultCode, Intent data) {
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onActivityResult(requestCode, resultCode, data);
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}
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// removed @Override temporarily just to get it working on RN0.33 and RN0.32
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public void onActivityResult(int requestCode, int resultCode, Intent data) {
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if (requestCode != READ_REQUEST_CODE)
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return;
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if (resultCode != Activity.RESULT_OK) {
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callback.invoke("Bad result code: " + resultCode, null);
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return;
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}
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if (data == null) {
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callback.invoke("No data", null);
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return;
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}
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try {
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Uri uri = data.getData();
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callback.invoke(null, toMapWithMetadata(uri));
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} catch (Exception e) {
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Log.e(NAME, "Failed to read", e);
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callback.invoke(e.getMessage(), null);
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}
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}
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private WritableMap toMapWithMetadata(Uri uri) {
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WritableMap map;
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if(uri.toString().startsWith("/")) {
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map = metaDataFromFile(new File(uri.toString()));
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} else if (uri.toString().startsWith("http")) {
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map = metaDataFromUri(uri);
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} else {
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map = metaDataFromContentResolver(uri);
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}
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map.putString("uri", uri.toString());
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return map;
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}
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private WritableMap metaDataFromUri(Uri uri) {
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WritableMap map = Arguments.createMap();
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File outputDir = getReactApplicationContext().getCacheDir();
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try {
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File downloaded = download(uri, outputDir);
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//map.putString(Fields.FILE_PATH, downloaded.getAbsolutePath());
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map.putInt(Fields.FILE_SIZE, (int) downloaded.length());
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map.putString(Fields.FILE_NAME, downloaded.getName());
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map.putString(Fields.TYPE, mimeTypeFromName(uri.toString()));
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} catch (IOException e) {
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Log.e("DocumentPicker", "Failed to download file", e);
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}
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return map;
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}
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private WritableMap metaDataFromFile(File file) {
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WritableMap map = Arguments.createMap();
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if(!file.exists())
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return map;
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//map.putString(Fields.FILE_PATH, file.getAbsolutePath());
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map.putInt(Fields.FILE_SIZE, (int) file.length());
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map.putString(Fields.FILE_NAME, file.getName());
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map.putString(Fields.TYPE, mimeTypeFromName(file.getAbsolutePath()));
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return map;
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}
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private WritableMap metaDataFromContentResolver(Uri uri) {
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WritableMap map = Arguments.createMap();
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ContentResolver contentResolver = getReactApplicationContext().getContentResolver();
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map.putString(Fields.TYPE, contentResolver.getType(uri));
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Cursor cursor = contentResolver.query(uri, null, null, null, null, null);
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try {
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if (cursor != null && cursor.moveToFirst()) {
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//map.putString(Fields.FILE_PATH, cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DATA)));
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//map.putString(Fields.FILE_PATH, "");
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map.putString(Fields.FILE_NAME, cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)));
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int sizeIndex = cursor.getColumnIndex(OpenableColumns.SIZE);
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if (!cursor.isNull(sizeIndex)) {
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String size = cursor.getString(sizeIndex);
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if (size != null)
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map.putInt(Fields.FILE_SIZE, Integer.valueOf(size));
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}
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}
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} finally {
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if (cursor != null) {
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cursor.close();
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}
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}
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return map;
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}
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private static File download(Uri uri, File outputDir) throws IOException {
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File file = File.createTempFile("prefix", "extension", outputDir);
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URL url = new URL(uri.toString());
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ReadableByteChannel channel = Channels.newChannel(url.openStream());
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try{
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FileOutputStream stream = new FileOutputStream(file);
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try {
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stream.getChannel().transferFrom(channel, 0, Long.MAX_VALUE);
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return file;
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} finally {
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stream.close();
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}
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} finally {
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channel.close();
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}
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}
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private static String mimeTypeFromName(String absolutePath) {
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String extension = MimeTypeMap.getFileExtensionFromUrl(absolutePath);
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if (extension != null) {
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return MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
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} else {
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return null;
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}
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}
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// Required for RN 0.30+ modules than implement ActivityEventListener
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public void onNewIntent(Intent intent) {
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}
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}

‎android/src/main/java/com/reactnativedocumentpicker/ReactNativeDocumentPicker.java‎

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package com.reactnativedocumentpicker;
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import com.facebook.react.ReactPackage;
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import com.facebook.react.bridge.JavaScriptModule;
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import com.facebook.react.bridge.NativeModule;
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import com.facebook.react.bridge.ReactApplicationContext;
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import com.facebook.react.uimanager.ViewManager;
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import com.reactnativedocumentpicker.DocumentPicker;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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public class ReactNativeDocumentPicker implements ReactPackage {
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// Deprecated RN 0.47
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public List<Class<? extends JavaScriptModule>> createJSModules() {
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return Collections.emptyList();
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}
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@Override
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public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
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return Collections.emptyList();
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}
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@Override
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public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
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List<NativeModule> modules = new ArrayList<>();
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modules.add(new DocumentPicker(reactContext));
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return modules;
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}
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}

‎index.js‎

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'use strict';
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import {Platform, NativeModules} from "react-native";
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const DocumentPicker = NativeModules.RNDocumentPicker;
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/**
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* Android requires mime types, iOS is a bit more complicated:
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*
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* @see https://developer.apple.com/library/ios/documentation/Miscellaneous/Reference/UTIRef/Articles/System-DeclaredUniformTypeIdentifiers.html
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*/
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class DocumentPickerUtil {
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static allFiles() {
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return (Platform.OS === 'android') ? "*/*" : "public.content";
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}
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static images() {
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return (Platform.OS === 'android') ? "image/*" : "public.image";
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}
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static videos() {
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return (Platform.OS === 'android') ? "video/*" : "public.movie";
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}
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static plainText() {
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return (Platform.OS === 'android') ? "text/plain" : "public.plain-text";
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}
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static audio() {
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return (Platform.OS === 'android') ? "audio/*" : "public.audio";
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}
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static pdf() {
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return (Platform.OS === 'android') ? "application/pdf" : "com.adobe.pdf";
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}
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}
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module.exports = {DocumentPickerUtil, DocumentPicker};

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