android file getname,android - 不推荐使用DownloadManager COLUMN_LOCAL_FILENAME - 堆栈内存溢出...
我通过解决这个问题 DownloadManager.COLUMN_LOCAL_URI 而不是 DownloadManager.COLUMN_LOCAL_FILENAME
DownloadManager.COLUMN_LOCAL_URI返回包含“file：//”的文件路径，因此您必须使用downloadFilePath = downloadFilePath.replace("file://","");将其从downloadFilePath排除downloadFilePath = downloadFilePath.replace("file://","");
以下是此问题的一行解决方案：
String downloadFilePath = (c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI))).replace("file://","");
检查下面的DownloadManager完整代码：
DownloadFinishedReceiver.java
public class DownloadFinishedReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, Intent intent) {
String action = intent.getAction();
if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action) && intent.getExtras()!=null) {
Bundle extras = intent.getExtras();
DownloadManager.Query q = new DownloadManager.Query();
long downloadId = extras.getLong(DownloadManager.EXTRA_DOWNLOAD_ID);
q.setFilterById(downloadId);
Cursor c = ((DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE)).query(q);
if (c.moveToFirst()) {
int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
if (status == DownloadManager.STATUS_SUCCESSFUL) {
String downloadFilePath = (c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI))).replace("file://","");
String downloadTitle = c.getString(c.getColumnIndex(DownloadManager.COLUMN_TITLE));
c.close();
Log.e("DownloadPath", downloadFilePath); // Print DownloadPath in Logcat
Log.e("DownloadTitle", downloadTitle); // Print DownloadTitle in Logcat
} else if (status == DownloadManager.STATUS_FAILED) {
removeTempOnFailure(context, downloadId);
}
}
}
}
// Remove temp/cache data
private void removeTempOnFailure(Context con, long downloadId) {
File cacheFileDir = new File(con.getCacheDir().getAbsolutePath());
for (File f : cacheFileDir.listFiles()) {
if (f.getName().contains(String.valueOf(downloadId))) {
f.delete();
break;
}
}
}
}
在AndroidMenifest.xml文件中注册BroadcastReceiver：
android:name="com.example.receiver.DownloadFinishedReceiver"
android:exported="true"
android:process=".downloadFinished">
将以下方法放在Activity中并传递适当的参数：
/**
*
* @param downloadUrl -> Your file download url
* @param downloadTitle -> Your file title to display in download manager
* @param fileName -> filename with extension like music.mp3 it will store in download folder
* @param hide -> true to hide downloadmanager in status bar, false to display it
* @return -> it will return downloadId
*/
private long downloadFromUrl(String downloadUrl, String downloadTitle, String fileName, boolean hide) {
Uri uri = Uri.parse(downloadUrl);
DownloadManager.Request request = new DownloadManager.Request(uri);
request.setTitle(downloadTitle);
if (hide) {
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);
request.setVisibleInDownloadsUi(false);
} else
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
return manager != null ? manager.enqueue(request) : 0;
}
如果您在上面的方法中传递hide = true，则必须在AndroidManifext.xml添加以下权限