将Asset中的数据库文件拷贝出来使用

设置保存路径

private final static String DATABASE_PATH
    = "/data"+ Environment.getDataDirectory().getAbsolutePath()+"/"+PACKAGE_NAME+"/database";

拷贝文件

public synchronized void  init(final Context context, final InitCallback callback){
        new Thread(new Runnable() {
            @Override
            public void run() {
                String databaseFilename = DATABASE_PATH + "/address.db";
                File dir = new File(DATABASE_PATH);
                LogW.out(DATABASE_PATH);
                if (!dir.exists())
                    dir.mkdir();
                if (!(new File(databaseFilename)).exists()) {
                    try {
//                InputStream is = context.getResources().openRawResource(R.raw.address);
                        InputStream is = context.getResources().getAssets().open("address.db");
                        FileOutputStream fos = new FileOutputStream(databaseFilename);
                        byte[] buffer = new byte[2048];
                        int i = 0;
                        while ((i = is.read(buffer)) > 0) {
                            fos.write(buffer, 0, i);
                        }
                        fos.flush();
                        fos.close();
                        is.close();
                    } catch (IOException e) {
                        new File(databaseFilename).delete();
                        db = null;
                        callback.onError(e);
                        return;
                    }
                }
                db = SQLiteDatabase.openOrCreateDatabase(databaseFilename, null);
                callback.onSucess();
            }
        }).run();
    }