来源: 互联网  发布时间: 2014-02-18

代码3

 
ArrayList<ColumnInfo> columns = new ArrayList<ColumnInfo>();
columns.add(...);
ColumnInfo[] columnList = new ColumnInfo[columns.size()];
columns.toArray(columnList);//将容器columns中的元素放进数组columnList中，如果数组不够大则新建一个数组，如果够大，则将多余的位置置null

此代码为从URI获取where子句。

private final String whereWithId(Uri uri, String selection) {
        String id = uri.getPathSegments().get(1);
        StringBuilder where = new StringBuilder("_id=");
        where.append(id);
        if (!TextUtils.isEmpty(selection)) {
            where.append(" AND (");
            where.append(selection);
            where.append(')');
        }
        return where.toString();
    }

public byte[] get(long key, long timestamp) {
        // Look up the record for the given key.
        Record record = null;
        synchronized (mIndexMap) {
            record = mIndexMap.get(key);
        }
        if (record != null) {
            // Read the chunk from the file.
            if (record.timestamp < timestamp) {
                Log.i(TAG, "File has been updated to " + timestamp + " since the last time " + record.timestamp
                        + " stored in cache.");
                return null;
            }
            try {
                RandomAccessFile chunkFile = getChunkFile(record.chunk);
                if (chunkFile != null) {
                    byte[] data = new byte[record.size];
                    chunkFile.seek(record.offset);
                    chunkFile.readFully(data);
                    return data;
                }
            } catch (Exception e) {
                Log.e(TAG, "Unable to read from chunk file");
            }
        }
        return null;
    }

    

    来源: 互联网  发布时间: 2014-02-18

object 3d模型文件到openGl ES 的数据文化转化

http://heikobehrens.net/2009/08/27/obj2opengl/

    

    来源: 互联网  发布时间: 2014-02-18

Ubuntu源码编译环境的安装
5.2 32bit服务器安装
Ubuntu Linux (32-bit x86)
To set up your Linux development environment, make sure you have the following:
Required Packages:
 Git 1.5.4 or newer and the GNU Privacy Guard.
 JDK 5.0, update 12 or higher.Java 6 is not supported, because of incompatibilities with @Override.
 flex, bison, gperf, libsdl-dev, libesd0-dev, libwxgtk2.6-dev (optional), build-essential, zip, curl.
$ sudo apt-get install git-core gnupg sun-java5-jdk flex bison gperf libsdl-dev libesd0-dev libwxgtk2.6-dev build-essential zip curl libncurses5-dev zlib1g-dev

You might also want Valgrind, a tool that will help you find memory leaks, stack corruption, array bounds overflows, etc.
$ sudo apt-get install valgrind

Intrepid ( 8.10) users may need a newer version of libreadline:
$ sudo apt-get install lib32readline5-dev

5.3 64bit服务器安装
Ubuntu Linux (64-bit x86)
This has not been as well tested. Please send success or failure reports to android-porting@googlegroups.com .

The Android build requires a 32-bit build environment as well as some other tools:

Required Packages:
 Git, JDK, flex, and the other packages as listed above in the i386 instructions:
 JDK 5.0, update 12 or higher.Java 6 is not supported, because of incompatibilities with @Override.
 Pieces from the 32-bit cross-building environment
 X11 development
$ sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl sun-java5-jdk zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev ia32-libs x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev

Set the system to use the right version of java by default:
$ sudo update-java-alternatives -s java-1.5.0-sun

X11: Ubuntu doesn't have packages for the X11 libraries, but that can be worked around with the following command:
$ sudo ln -s /usr/lib32/libX11.so.6 /usr/lib32/libX11.so