问题描述
我通过url下载PDF，保存后通过intent打开。但是它说无法显示PDF（无法打开）。我还授予了所有读写权限。 PDF已成功保存，我也可以在“文件管理器”中看到该文件，也可以从那里打开它。但不是来自我的应用程序。
使用的代码=>
private void downloadAndViewAttachment(String url) {
String extension = url.substring(url.lastIndexOf("."));
Log.v("extension",extension);
fileName = url.substring(url.lastIndexOf("/"));
fileName = fileName.replace("/","");
Log.v("fileName",fileName);
final File file = new File(Environment.getExternalStoragePublicDirectory(getString(R.string.app_name)),AppConstants.Attachments);
AndroidNetworking.download(url,file.getPath(),AppUtils.getTimeStamp() + "_" + fileName)
.setPriority(Priority.HIGH)
.build()
.setDownloadProgressListener(new DownloadProgressListener() {
@Override
public void onProgress(long bytesDownloaded,long totalBytes) {
AppUtils.showRequestDialog(mActivity);
}
})
.startDownload(new DownloadListener() {
@Override
public void onDownloadComplete() {
AppUtils.hideDialog(mActivity);
AppUtils.showToastSort(mActivity,getString(R.string.download_succesfully));
openPdfFile(file.getPath() + "/" + AppUtils.getTimeStamp() + "_" + fileName);
}
@Override
public void onError(ANError anError) {
AppUtils.hideDialog(mActivity);
Log.v("downloadError",anError.getErrorBody());
Log.v("downloadError",anError.getErrorDetail());
Log.v("downloadError",String.valueOf(anError.getErrorCode()));
AppUtils.showToastSort(mActivity,getString(R.string.something_error));
}
});
}
private void openPdfFile(String path) {
AppUtils.hideDialog(mActivity);
File file = new File(path);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),"application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);
}
解决方法
如果功能AppUtils.getTimeStamp()确实在起作用，那么您会在onDownloadComplete中得到不同的时间戳。尝试将文件名保存在本地变量中并重用：
private void downloadAndViewAttachment(String url) {
String extension = url.substring(url.lastIndexOf("."));
Log.v("extension",extension);
fileName = url.substring(url.lastIndexOf("/"));
fileName = fileName.replace("/","");
Log.v("fileName",fileName);
final File file = new File(Environment.getExternalStoragePublicDirectory(getString(R.string.app_name)),AppConstants.Attachments);
// Save complete Filename in variable.
final String fullFilename = AppUtils.getTimeStamp() + "_" + fileName;
AndroidNetworking.download(url,file.getPath(),fullFilename)
.setPriority(Priority.HIGH)
.build()
.setDownloadProgressListener(new DownloadProgressListener() {
@Override
public void onProgress(long bytesDownloaded,long totalBytes) {
AppUtils.showRequestDialog(mActivity);
}
})
.startDownload(new DownloadListener() {
@Override
public void onDownloadComplete() {
AppUtils.hideDialog(mActivity);
AppUtils.showToastSort(mActivity,getString(R.string.download_succesfully));
// Reuse variabel.
openPdfFile(file.getPath() + "/" + fullFilename);
}
@Override
public void onError(ANError anError) {
AppUtils.hideDialog(mActivity);
Log.v("downloadError",anError.getErrorBody());
Log.v("downloadError",anError.getErrorDetail());
Log.v("downloadError",String.valueOf(anError.getErrorCode()));
AppUtils.showToastSort(mActivity,getString(R.string.something_error));
}
});
}