IntentUtils.java

package co.smartreceipts.android.utils;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.os.Build;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.text.TextUtils;

import com.google.common.base.Preconditions;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

import co.smartreceipts.android.utils.log.Logger;

public class IntentUtils {

    private static final String AUTHORITY_FORMAT = "%s.fileprovider";

    private IntentUtils() {

    }

    /**
     * All PDF Viewers that I tested don't work with File Providers yet, so this is our fallback way
     */
    @NonNull
    @Deprecated
    public static Intent getLegacyViewIntent(@NonNull Context context, @NonNull File file, @NonNull String fallbackMimeType) {
        Preconditions.checkNotNull(context);
        Preconditions.checkNotNull(file);
        Preconditions.checkNotNull(fallbackMimeType);

        final Intent sentIntent = new Intent(Intent.ACTION_VIEW);
        final Uri uri = Uri.fromFile(file);
        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
            grantReadPermissionsToUri(context, sentIntent, uri);
        }

        final String mimeType = UriUtils.getMimeType(uri, context.getContentResolver());
        if (!TextUtils.isEmpty(mimeType)) {
            sentIntent.setDataAndType(uri, mimeType);
        } else {
            sentIntent.setDataAndType(uri, fallbackMimeType);
        }
        sentIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        return sentIntent;
    }

    @NonNull
    public static Intent getViewIntent(@NonNull Context context, @NonNull File file, @NonNull String fallbackMimeType) {
        Preconditions.checkNotNull(context);
        Preconditions.checkNotNull(file);
        Preconditions.checkNotNull(fallbackMimeType);

        final Intent sentIntent = new Intent(Intent.ACTION_VIEW);
        final String authority = String.format(Locale.US, AUTHORITY_FORMAT, context.getPackageName());
        final Uri uri = getUriFromFile(context, authority, file);

        // We need to do this for all devices (not just KK+) but this to work it seems
        grantReadPermissionsToUri(context, sentIntent, uri);

        final String mimeType = UriUtils.getMimeType(uri, context.getContentResolver());
        if (!TextUtils.isEmpty(mimeType)) {
            sentIntent.setDataAndType(uri, mimeType);
        } else {
            sentIntent.setDataAndType(uri, fallbackMimeType);
        }
        sentIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        return sentIntent;
    }

    @NonNull
    public static Intent getSendIntent(@NonNull Context context, @NonNull File file) {
        Preconditions.checkNotNull(context);
        Preconditions.checkNotNull(file);

        final Intent sentIntent = new Intent(Intent.ACTION_SEND);
        final String authority = String.format(Locale.US, AUTHORITY_FORMAT, context.getPackageName());
        final Uri uri = getUriFromFile(context, authority, file);

        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
            grantReadPermissionsToUri(context, sentIntent, uri);
        }

        final String mimeType = UriUtils.getMimeType(uri, context.getContentResolver());
        if (!TextUtils.isEmpty(mimeType)) {
            sentIntent.setType(mimeType);
        } else {
            sentIntent.setType("application/octet-stream");
        }
        sentIntent.putExtra(Intent.EXTRA_STREAM, uri);
        sentIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        return sentIntent;
    }

    @NonNull
    public static Intent getSendIntent(@NonNull Context context, @NonNull List<File> files) {
        Preconditions.checkNotNull(context);
        Preconditions.checkNotNull(files);

        if (files.size() == 1) {
            return getSendIntent(context, files.get(0));
        } else {
            final Intent sentIntent = new Intent(Intent.ACTION_SEND_MULTIPLE);
            sentIntent.setType("application/octet-stream");

            final String authority = String.format(Locale.US, AUTHORITY_FORMAT, context.getPackageName());
            final ArrayList<Uri> uris = new ArrayList<>();
            for (final File file : files) {
                final Uri uri = getUriFromFile(context, authority, file);
                if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
                    grantReadPermissionsToUri(context, sentIntent, uri);
                }
                uris.add(uri);
            }

            sentIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
            sentIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            return sentIntent;
        }
    }

    public static Intent getImageCaptureIntent(@NonNull Context context, @NonNull File file) {
        Preconditions.checkNotNull(context);
        Preconditions.checkNotNull(file);

        final Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        final String authority = String.format(Locale.US, AUTHORITY_FORMAT, context.getPackageName());
        final Uri uri = getUriFromFile(context, authority, file);

        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
            grantReadWritePermissionsToUri(context, intent, uri);
        }
        intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
        return intent;
    }

    /**
     * KitKat doesn't handle this gracefully, so we manually give permissions to all apps :/
     */
    private static void grantReadPermissionsToUri(@NonNull Context context, @NonNull Intent intent, @NonNull Uri uri) {
        Logger.debug(IntentUtils.class, "Granting read permissions to all potential apps for {}.", uri);
        final List<ResolveInfo> resInfoList = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
        for (final ResolveInfo resolveInfo : resInfoList) {
            final String packageName = resolveInfo.activityInfo.packageName;
            context.grantUriPermission(packageName, uri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
        }
    }

    /**
     * KitKat doesn't handle this gracefully, so we manually give permissions to all apps :/
     */
    private static void grantReadWritePermissionsToUri(@NonNull Context context, @NonNull Intent intent, @NonNull Uri uri) {
        Logger.debug(IntentUtils.class, "Granting read/write permissions to all potential apps for {}.", uri);
        final List<ResolveInfo> resInfoList = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
        for (final ResolveInfo resolveInfo : resInfoList) {
            final String packageName = resolveInfo.activityInfo.packageName;
            context.grantUriPermission(packageName, uri, Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
        }
    }

    @NonNull
    private static Uri getUriFromFile(@NonNull Context context, @NonNull String authority, @NonNull File file) {
        return ContentUriProvider.getUriForFile(context, authority, file);
    }

    public static Intent getRatingIntent(Context context) {
        String GOOGLE = "com.android.vending";
        String AMAZON = "com.amazon.venezia";

        String packageName = context.getPackageName();
        String name = context.getPackageManager().getInstallerPackageName(packageName);

        if (GOOGLE.equals(name)) {
            return new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + packageName));
        }
        else if (AMAZON.equals(name)) {
            return new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.amazon.com/gp/mas/dl/android?p=" + packageName));
        }
        else {
            // Default to Google... May lead to a crash if user does not have this installed
            return new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + packageName));
        }
    }

}