Android can';无法使用OkHttp3在文件管理器中选择文件
我试图创建一个应用程序,我必须上传任何文件不超过16-20 mb。我正在使用OkHttpClient3,但我的主要问题是它将使用简单名称的文件,如a.mp4、b.jpg等。但它不能选择像Android can';无法使用OkHttp3在文件管理器中选择文件,android,web-services,file,upload,server,Android,Web Services,File,Upload,Server,我试图创建一个应用程序,我必须上传任何文件不超过16-20 mb。我正在使用OkHttpClient3,但我的主要问题是它将使用简单名称的文件,如a.mp4、b.jpg等。但它不能选择像hello world 12.mp4这样的文件 RequestBody file\u body=RequestBody.create(MediaType.parse(content\u type),f)。 我的密码是 public void enable_button(){ choosefile
hello world 12.mp4这样的文件
RequestBody file\u body=RequestBody.create(MediaType.parse(content\u type),f)。
我的密码是
public void enable_button(){
choosefile.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new MaterialFilePicker()
.withActivity(ShowStudent.this)
.withRequestCode(10)
.start();
}
});
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if(requestCode == 100 && (grantResults[0] == PackageManager.PERMISSION_GRANTED)){
enable_button();
}else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},100);
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
if(requestCode == 10 && resultCode == RESULT_OK){
progress = new ProgressDialog(ShowStudent.this);
progress.setTitle("Uploading");
progress.setMessage("Please wait...");
progress.show();
Thread t = new Thread(new Runnable() {
@Override
public void run() {
File f = new File(data.getStringExtra(FilePickerActivity.RESULT_FILE_PATH));
String content_type = getMimeType(f.getPath());
String file_path = f.getAbsolutePath();
OkHttpClient client = new OkHttpClient();
RequestBody file_body = RequestBody.create(MediaType.parse(content_type),f);
RequestBody request_body = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("type",content_type)
.addFormDataPart("uploaded_file",file_path.substring(file_path.lastIndexOf("/")+1), file_body)
.build();
Request request = new Request.Builder()
.url("http://onsitesupport.info/diary/uploadproject.php")
.post(request_body)
.build();
try {
Response response = client.newCall(request).execute();
if(!response.isSuccessful()){
throw new IOException("Error : "+response);
}
progress.dismiss();
} catch (IOException e) {
e.printStackTrace();
}
}
});
t.start();
}
}
private String getMimeType(String path) {
String extension = MimeTypeMap.getFileExtensionFromUrl(path);
return MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
}
我得到了这个例外
E/AndroidRuntime: FATAL EXCEPTION: Thread-3122
Process: com.kliff.studentteacherportal, PID: 29436
java.lang.NullPointerException: Attempt to invoke interface method 'int java.lang.CharSequence.length()' on a null object reference
at java.util.regex.Matcher.reset(Matcher.java:177)
at java.util.regex.Matcher.<init>(Matcher.java:90)
at java.util.regex.Pattern.matcher(Pattern.java:297)
at okhttp3.MediaType.parse(MediaType.java:51)
at com.kliff.studentteacherportal.ShowStudent$2.run(ShowStudent.java:100)
at java.lang.Thread.run(Thread.java:818)
E/WindowManager: android.view.WindowLeaked: Activity com.kliff.studentteacherportal.ShowStudent has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{26acab10 V.E..... R......D 0,0-684,322} that was originally added here
at android.view.ViewRootImpl.<init>(ViewRootImpl.java:458)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:278)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85)
at android.app.Dialog.show(Dialog.java:311)
at com.kliff.studentteacherportal.ShowStudent.onActivityResult(ShowStudent.java:91)
at android.app.Activity.dispatchActivityResult(Activity.java:6294)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3873)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3920)
at android.app.ActivityThread.access$1300(ActivityThread.java:182)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1523)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5706)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1033)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:828)
W/MALI: glDrawArrays:714: [MALI] glDrawArrays takes more than 5ms here. Total elapse time(us): 5659
E/AndroidRuntime:致命异常:Thread-3122
流程:com.kliff.studentteacherportal,PID:29436
java.lang.NullPointerException:尝试对空对象引用调用接口方法“int java.lang.CharSequence.length()”
位于java.util.regex.Matcher.reset(Matcher.java:177)
位于java.util.regex.Matcher.(Matcher.java:90)
位于java.util.regex.Pattern.matcher(Pattern.java:297)
位于okhttp3.MediaType.parse(MediaType.java:51)
在com.kliff.studentteacherportal.showstustudent$2.run(showstustudent.java:100)
运行(Thread.java:818)
E/WindowManager:android.view.WindowLeaked:Activity com.kliff.studentteacherportal.showtudent泄漏了最初添加到此处的window com.android.internal.policy.impl.PhoneWindow$DecorView{26acab10 V.E..R..D 0,0-684322}
在android.view.ViewRootImpl。(ViewRootImpl.java:458)
在android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:278)
在android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85)
在android.app.Dialog.show上(Dialog.java:311)
在com.kliff.studentteacherportal.showtudent.onActivityResult(showtudent.java:91)上
位于android.app.Activity.dispatchActivityResult(Activity.java:6294)
位于android.app.ActivityThread.deliverResults(ActivityThread.java:3873)
位于android.app.ActivityThread.handleSendResult(ActivityThread.java:3920)
在android.app.ActivityThread.access$1300(ActivityThread.java:182)
在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1523)
位于android.os.Handler.dispatchMessage(Handler.java:111)
位于android.os.Looper.loop(Looper.java:194)
位于android.app.ActivityThread.main(ActivityThread.java:5706)
位于java.lang.reflect.Method.invoke(本机方法)
位于java.lang.reflect.Method.invoke(Method.java:372)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run上(ZygoteInit.java:1033)
位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:828)
W/MALI:glDrawArrays:714:[马里]glDrawArrays在这里需要5毫秒以上的时间。总消逝时间(us):5659
好吧,我想,它不能选择带空格的文件,但我通过替换
String mimeType= URLConnection.guessContentTypeFromName(f.getName());
RequestBody file_body = RequestBody.create(MediaType.parse(mimeType),f);`
java.lang.NullPointerException:尝试对空对象引用调用接口方法“int java.lang.CharSequence.length()”
。所以您的变量是null
。使用前检查。并找出为什么它是空的。根据您的日志,它位于在线(showtudent.java:91)
。@greenapps一些文件已上载到服务器,但其他文件未上载。。。另一个问题是,若文件大小很大,那个么即使上传了文件,进度条也不会关闭。这个问题只会出现在我刚接触Android的大文件中。请帮助我你应该先解决空指针问题。我想知道你为什么连名字都不提。不要哭着求救。我已经给了你帮助,但你却忽视了。为什么?它不能选择像hello world 12.mp4这样的文件。您的意思是它不能选择文件名中有空格的文件吗?那么请告诉我你是如何选择文件的。用什么?不清楚是谁在选择。@greenapps您是对的,它不能选择带空格的文件,但我通过替换'String mimeType=URLConnection.guessContentTypeFromName(f.getName());RequestBody file_body=RequestBody.create(MediaType.parse(mimeType),f);