Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

import java.io.FileInputStream;

import java.io.IOException;
import java.io.InputStream;

public class Main {
    public static final String ASSETS_PREFIX = "file://android_assets/";
    public static final String ASSETS_PREFIX2 = "file://android_asset/";
    public static final String ASSETS_PREFIX3 = "assets://";
    public static final String ASSETS_PREFIX4 = "asset://";
    public static final String RAW_PREFIX = "file://android_raw/";
    public static final String RAW_PREFIX2 = "raw://";
    public static final String FILE_PREFIX = "file://";
    public static final String DRAWABLE_PREFIX = "drawable://";

    public static InputStream getStream(Context context, String url) throws IOException {
        String lowerUrl = url.toLowerCase();
        InputStream is;
        if (lowerUrl.startsWith(ASSETS_PREFIX)) {
            String assetPath = url.substring(ASSETS_PREFIX.length());
            is = getAssetsStream(context, assetPath);
        } else if (lowerUrl.startsWith(ASSETS_PREFIX2)) {
            String assetPath = url.substring(ASSETS_PREFIX2.length());
            is = getAssetsStream(context, assetPath);
        } else if (lowerUrl.startsWith(ASSETS_PREFIX3)) {
            String assetPath = url.substring(ASSETS_PREFIX3.length());
            is = getAssetsStream(context, assetPath);
        } else if (lowerUrl.startsWith(ASSETS_PREFIX4)) {
            String assetPath = url.substring(ASSETS_PREFIX4.length());
            is = getAssetsStream(context, assetPath);
        } else if (lowerUrl.startsWith(RAW_PREFIX)) {
            String rawName = url.substring(RAW_PREFIX.length());
            is = getRawStream(context, rawName);
        } else if (lowerUrl.startsWith(RAW_PREFIX2)) {
            String rawName = url.substring(RAW_PREFIX2.length());
            is = getRawStream(context, rawName);
        } else if (lowerUrl.startsWith(FILE_PREFIX)) {
            String filePath = url.substring(FILE_PREFIX.length());
            is = getFileStream(filePath);
        } else if (lowerUrl.startsWith(DRAWABLE_PREFIX)) {
            String drawableName = url.substring(DRAWABLE_PREFIX.length());
            is = getDrawableStream(context, drawableName);
        } else {
            throw new IllegalArgumentException(
                    String.format("Unsupported url: %s \n" + "Supported: \n%sxxx\n%sxxx\n%sxxx", url, ASSETS_PREFIX,
                            RAW_PREFIX, FILE_PREFIX));
        }
        return is;
    }

    private static InputStream getAssetsStream(Context context, String path) throws IOException {
        return context.getAssets().open(path);
    }

    private static InputStream getRawStream(Context context, String rawName) throws IOException {
        int id = context.getResources().getIdentifier(rawName, "raw", context.getPackageName());
        if (id != 0) {
            try {
                return context.getResources().openRawResource(id);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        throw new IOException(String.format("raw of id: %s from %s not found", id, rawName));
    }

    private static InputStream getFileStream(String path) throws IOException {
        return new FileInputStream(path);
    }

    private static InputStream getDrawableStream(Context context, String rawName) throws IOException {
        int id = context.getResources().getIdentifier(rawName, "drawable", context.getPackageName());
        if (id != 0) {
            BitmapDrawable drawable = (BitmapDrawable) context.getResources().getDrawable(id);
            Bitmap bitmap = drawable.getBitmap();

            ByteArrayOutputStream os = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG, 0, os);
            return new ByteArrayInputStream(os.toByteArray());
        }

        throw new IOException(String.format("bitmap of id: %s from %s not found", id, rawName));
    }
}