我正在尝试使用谷歌下载管理器下载主要和补丁扩展文件，这些文件都是通过apk上传的。我几乎跟随谷歌的例子。下载过程开始，但立即以“STATE_COMPLETED”停止。没有错误，但文件仍然缺失。只有在我手动将文件复制到设备时，该应用程序才有效。
这是我的下载活动：
public class DownloadActivity extends Activity implements IDownloaderClient {
private IStub mDownloaderClientStub;
private IDownloaderService mRemoteService;
private boolean downloadDoneRegistered = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_download);
startDownload();
}
@Override
protected void onResume() {
if (null != mDownloaderClientStub) {
mDownloaderClientStub.connect(this);
}
super.onResume();
}
@Override
protected void onStop() {
if (null != mDownloaderClientStub) {
mDownloaderClientStub.disconnect(this);
}
super.onStop();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.download, menu);
return true;
}
// IDownloaderClient
@Override
public void onServiceConnected(Messenger m) {
mRemoteService = DownloaderServiceMarshaller.CreateProxy(m);
mRemoteService.onClientUpdated(mDownloaderClientStub.getMessenger());
}
@Override
public void onDownloadStateChanged(int newState) { //todo
switch (newState) {
case IDownloaderClient.STATE_IDLE:
case IDownloaderClient.STATE_CONNECTING:
case IDownloaderClient.STATE_FETCHING_URL:
case IDownloaderClient.STATE_DOWNLOADING:
break;
case IDownloaderClient.STATE_FAILED_CANCELED:
case IDownloaderClient.STATE_FAILED:
case IDownloaderClient.STATE_FAILED_FETCHING_URL:
case IDownloaderClient.STATE_FAILED_UNLICENSED:
downloadFailed();
break;
case IDownloaderClient.STATE_PAUSED_NEED_CELLULAR_PERMISSION:
case IDownloaderClient.STATE_PAUSED_WIFI_DISABLED_NEED_CELLULAR_PERMISSION:
case IDownloaderClient.STATE_PAUSED_BY_REQUEST:
case IDownloaderClient.STATE_PAUSED_ROAMING:
case IDownloaderClient.STATE_PAUSED_SDCARD_UNAVAILABLE:
break;
case IDownloaderClient.STATE_COMPLETED:
downloadDone();
return;
default:
break;
}
}
@Override
public void onDownloadProgress(DownloadProgressInfo progress) {
float p = (float)progress.mOverallProgress;
if (progress.mOverallTotal>0) {
p /= (float)progress.mOverallTotal;
} else {
p = 0.0f;
}
String s = String.format(getString(R.string.download_progress).replace("#","%"),100.0f*p);
D.L(this,s);
setProgressBar(p);
setText(s);
}
//
private void startDownload() {
D.L(this,getString(R.string.download_checkfiles));
setProgressBar(0.0f);
setText(getString(R.string.download_checkfiles));
if (!expansionFilesDelivered()) {
D.L(this,"expansion files not downloaded so far");
setProgressBar(0.0f);
setText(String.format(getString(R.string.download_progress).replace("#","%"),0.0f));
try {
Intent launchIntent = DownloadActivity.this.getIntent();
Intent intentToLaunchThisActivityFromNotification = new Intent(DownloadActivity.this,DownloadActivity.this.getClass());
intentToLaunchThisActivityFromNotification.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TOP);
intentToLaunchThisActivityFromNotification.setAction(launchIntent.getAction());
PendingIntent pendingIntent = PendingIntent.getActivity(DownloadActivity.this,0,intentToLaunchThisActivityFromNotification,PendingIntent.FLAG_UPDATE_CURRENT);
D.L(this,"start download service");
int startResult = DownloaderClientMarshaller.startDownloadServiceIfRequired(this,pendingIntent,DownloadService.class);
D.L(this,""+startResult+" <-compare-> "+DownloaderClientMarshaller.NO_DOWNLOAD_REQUIRED+"=NO_DOWNLOAD_REQUIRED");
if (startResult!=DownloaderClientMarshaller.NO_DOWNLOAD_REQUIRED) {
D.L(this,"-> download required, create stub");
setText(String.format(getString(R.string.download_progress).replace("#","%"),0.0f));
mDownloaderClientStub = DownloaderClientMarshaller.CreateStub(this,DownloadService.class);
return;
} else {
D.L(this,"no download required");
downloadDone();
}
} catch (NameNotFoundException e) {
D.L(this,e.getMessage());
downloadFailed();
}
} else {
// validate apk zip files(?)
D.L(this,"expansion files valid, no download required");
downloadDone();
}
}
boolean expansionFilesDelivered() {
if ((Download.MAIN_EXISTS) &&
(!Helpers.doesFileExist(this,Helpers.getExpansionAPKFileName(this,true,Download.MAIN_VERSION),Download.MAIN_SIZE,false))) {
return false;
}
if ((Download.PATCH_EXISTS) &&
(!Helpers.doesFileExist(this,Helpers.getExpansionAPKFileName(this,false,Download.PATCH_VERSION),Download.PATCH_SIZE,false))) {
return false;
}
return true;
}
private void setProgressBar(float value) {
((ProgressBar)findViewById(R.id.progressBar)).setProgress((int)(1000.0f*value));
}
private void setText(String text) {
((TextView)findViewById(R.id.textView)).setText(text);
}
private void downloadDone() {
if (!downloadDoneRegistered) {
downloadDoneRegistered = true;
D.L(this,"downloadDone(): download terminated");
setProgressBar(1.0f);
setText(getString(R.string.download_completed));
boolean fileAccess = true;
if (Download.MAIN_EXISTS) {
Download.SetMainFile(safeFileAccess(Helpers.getExpansionAPKFileName(this,true,Download.MAIN_VERSION)));
fileAccess = fileAccess && (Download.GetMainFile()!=null);
} else {
D.L(this,"no main expansion file");
}
if (Download.PATCH_EXISTS) {
Download.SetPatchFile(safeFileAccess(Helpers.getExpansionAPKFileName(this,false,Download.PATCH_VERSION)));
fileAccess = fileAccess && (Download.GetPatchFile()!=null);
} else {
D.L(this,"no patch expansion file");
}
if (fileAccess) {
D.L(this,"file access passed");
T.StartActivity(this,SplashActivity.class,true);
} else {
fileAccessFailed();
}
}
}
private File safeFileAccess(String fileName) {
D.L(this,"try to access file...");
File r = new File(
Environment.getExternalStorageDirectory()+File.separator+
"Android"+File.separator+
"obb"+File.separator+
getPackageName() ,
fileName);
D.L(this," "+r);
if (r.exists()) {
D.L(this," passed");
} else {
D.L(this," failed");
r = null;
}
return r;
}
private void downloadFailed() {
D.L(this,getString(R.string.download_failed));
setText(getString(R.string.download_failed));
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(getString(R.string.download_failed_dialogtext));
builder.setPositiveButton(getString(R.string.download_dialog_okay),new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
finish();
}
});
builder.create().show();
}
private void fileAccessFailed() {
D.L(this,getString(R.string.download_accessfailed));
setText(getString(R.string.download_accessfailed));
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(getString(R.string.download_accessfailed_dialogtext));
builder.setPositiveButton(getString(R.string.download_dialog_okay),new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
finish();
}
});
builder.create().show();
}
}
我的闹钟接收器：
public class DownloadAlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
try {
DownloaderClientMarshaller.startDownloadServiceIfRequired(context,intent,DownloadService.class);
} catch (NameNotFoundException e) {
e.printStackTrace();
}
}
}
我的下载服务：
public class DownloadService extends DownloaderService {
@Override
public String getPublicKey() {
return Download.BASE64_PUBLIC_KEY;
}
@Override
public byte[] getSALT() {
return Download.SALT;
}
@Override
public String getAlarmReceiverClassName() {
return DownloadAlarmReceiver.class.getName();
}
}
一些数据：
public class Download {
private static Download Instance = new Download();
public static Download GetInstance() { return Instance; }
//todo
public static final String BASE64_PUBLIC_KEY = "..actual key..";
public static final byte[] SALT = new byte[] {..numbers..};
public static final boolean MAIN_EXISTS = true;
public static final int MAIN_VERSION = 2;
public static final long MAIN_SIZE = 20971520L;
public static final boolean PATCH_EXISTS = true;
public static final int PATCH_VERSION = 2;
public static final long PATCH_SIZE = 10485760L;
…
有什么想法吗？