如何在Android Google云端硬盘中上传文件或文档

Question

我如何在Android谷歌驱动器上传图像，PDF文件或zip文件.. 你有人能建议我吗？

MainActivity.class

     public class MainActivity extends Activity {
        Button docs,images,music,share;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
   }
     }