我真的在努力使用我的Dropbox API
我想把它放在一个我可以从其他课程调用的超级课程中
令我困惑的是我不知道如何正确设置它
我已经上课并宣布它为超级班
我已获取所有API信息，但我需要能够从其他活动中选择文件夹名称和文件名。
即：我有一个名为发射器的部分，该部分有7个下载选项;然后我有另一个名为anima的3个下载活动，我想使用相同的API只需更改目录和路径
另外，我如何从另一个活动中调用它？
public class HarropDropBoxApi extends Activity {
public static String APP_TYPE = "I want to name this from other classes??";
public static String APK_NAME = "I want to name this depending on the item in my list view in other classes ";
public static String path = Environment.getExternalStorageDirectory().getAbsolutePath() + APP_TYPE;
public static File Dir = new File(path);
AndroidAuthSession session = buildSession();
static DropboxAPI<AndroidAuthSession> dropboxAPI;
private final String APP_KEY = "my-app-key";
private final String APP_ACCESS = "my-access-key";
private final String TOKEN = "my-token";
private DropboxAPI.UploadRequest request;
public HarropDropBoxApi() {
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Dir.mkdir();
dropboxAPI = new DropboxAPI<AndroidAuthSession>(session);
//below was how i was calling the api for a single App Type and Apk name
//DownloadFromDropboxFromPath(path + "downloadFileFromDropbox", "CastingApps/AllCast.apk");
/// This line ive changed to match my strings above to be called from other classes/activities will this work?
// Also this line is where the file is downloaded to and from so does this line get called from here or from my activities??
DownloadFromDropboxFromPath(path + "downloadFileFromDropbox", APP_TYPE + APK_NAME );
}
private AndroidAuthSession buildSession() {
AppKeyPair appKeyPair = new AppKeyPair(APP_KEY, APP_ACCESS);
AndroidAuthSession session = new AndroidAuthSession(appKeyPair);
session.setOAuth2AccessToken(TOKEN);
return session;
}
public static String DropboxDownloadPathFrom = "";
public static String DropboxDownloadPathTo = "";
private void DownloadFromDropboxFromPath(String downloadPathTo, final String downloadPathFrom) {
DropboxDownloadPathTo = downloadPathTo;
DropboxDownloadPathFrom = downloadPathFrom;
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "Downloading Please wait ...", Toast.LENGTH_LONG).show();
Thread th = new Thread(new Runnable() {
public void run() {
final File file = new File(DropboxDownloadPathTo + DropboxDownloadPathFrom.substring(DropboxDownloadPathFrom.lastIndexOf('.')));
if (file.exists()) file.delete();
try {
FileOutputStream outputStream = new FileOutputStream(file);
HarropDropBoxApi.dropboxAPI.getFile(DropboxDownloadPathFrom, null, outputStream, null);
getMain().runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "File successfully downloaded.", Toast.LENGTH_SHORT).show();
Intent promptInstall = new Intent(Intent.ACTION_VIEW).setDataAndType(Uri.fromFile(file),
"application/vnd.android.package-archive");
promptInstall.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(promptInstall);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
});
th.start();
}
});
}
public HarropDropBoxApi getMain() {
return this;
}
}
答案 0 :(得分：1)
由于我没有使用Dropbox API，所以我在没有测试的情况下把它放在一起，但逻辑对我来说似乎很好。
首先，使用AsyncTask，而不是低级Thread进行后台操作。这里要注意的事项：
Context参数（如活动），期望您将硬编码的字符串从Java代码移到某个资源文件中。 setOnDownloadListener，文件将会下载，但结果不会发生任何事情。public class DropboxDownloadTask extends AsyncTask<String, Void, File> {
public interface OnDropboxDownloadListener {
void onSuccess(File dropboxFile);
}
private static final String APP_KEY = "my-app-key";
private static final String APP_ACCESS = "my-access-key";
private static final String TOKEN = "my-token";
// TODO: See below
// private final String appKey, appAccess, dropboxToken;
private final Context context;
private final AndroidAuthSession session;
private final DropboxAPI<AndroidAuthSession> dropboxAPI;
private OnDropboxDownloadListener listener;
public DropboxDownloadTask(Context c) {
this.context = c;
// TODO: Move those strings to a string resource file
/*
appKey = c.getResources().getString(R.string.dropbox_app_key);
appAccess = c.getResources().getString(R.string.dropbox_access_key);
dropboxToken = c.getResources().getString(R.string.dropbox_token);
*/
session = buildSession();
dropboxAPI = new DropboxAPI<AndroidAuthSession>(session);
}
public void setOnDownloadListener(OnDropboxDownloadListener listener) {
this.listener = listener;
}
private AndroidAuthSession buildSession() {
AppKeyPair appKeyPair = new AppKeyPair(APP_KEY, APP_ACCESS);
AndroidAuthSession session = new AndroidAuthSession(appKeyPair);
session.setOAuth2AccessToken(TOKEN);
return session;
}
@Override
protected File doInBackground(String... params) {
File file;
if (params.length != 2) {
throw new IllegalArgumentException("Must give Dropbox to and from paths!");
}
String downloadPathTo = params[0];
String downloadPathFrom = params[1];
file = new File(downloadPathTo + downloadPathFrom.substring(downloadPathFrom.lastIndexOf('.')));
if (file.exists()) file.delete();
try {
FileOutputStream outputStream = new FileOutputStream(file);
dropboxAPI.getFile(downloadPathFrom, null, outputStream, null);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return file;
}
@Override
protected void onPostExecute(File result) {
if (this.listener != null) {
this.listener.onSuccess(result);
}
}
}
现在您已经拥有了这个功能，您可以在任何有Context引用的地方使用，并且可以实现OnDropboxDownloadListener。在你的问题中你没有清楚为什么你扩展了一个Activity类，但如果你打算使用一个Activity，它可能看起来像这样。
public class MainActivity extends Activity implements DropboxDownloadTask.OnDropboxDownloadListener {
private DropboxDownloadTask dropboxDownloadTask;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// pass the context
dropboxDownloadTask = new DropboxDownloadTask(this);
// pass the listener
dropboxDownloadTask.setOnDownloadListener(this);
// TODO: Implement
downloadFromDropbox("to", "from");
}
private void downloadFromDropbox(String downloadPathTo, final String downloadPathFrom) {
Toast.makeText(getApplicationContext(), "Downloading Please wait ...", Toast.LENGTH_LONG).show();
dropboxDownloadTask.execute(downloadPathFrom, downloadPathTo);
}
@Override
public void onSuccess(File dropboxFile) {
Toast.makeText(getApplicationContext(), "File successfully downloaded.", Toast.LENGTH_SHORT).show();
Intent promptInstall = new Intent(Intent.ACTION_VIEW)
.setDataAndType(Uri.fromFile(dropboxFile), "application/vnd.android.package-archive");
promptInstall.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(promptInstall);
}
}