在我的应用程序中，我从文档目录和意图中获取图像和视频文件，然后在请求代码匹配2的OnActivityResult()方法中获取绝对路径，然后有一个AsyncTask负责发送该文件（用于测试服务器）但它在doPlaceUpload()内的doInBackground()方法中捕获异常
例外：
/document/image:1665: open failed: ENOENT (No such file or directory)
我想我无法从绝对路径获取文件，但因为我是android的新手，所以我无法弄清楚如何做到这一点。
代码：
public class AddPlaceActivity extends ActionBarActivity {
Button addMap,selectFiles;
ImageView uploadBtn;
TextView placeName,placeDesc;
double lat;
double lng;
String FilePath;
ProgressDialog pDialog;
HttpEntity resEntity;
ArrayList<String> FileNames=new ArrayList<String>();
ArrayList<File> FilesToUpload=new ArrayList<File>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_place);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setTitleTextColor(0xFFFFFFFF);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
init_views();
}
private void init_views(){
uploadBtn = (ImageView)findViewById(R.id.place_uplaod_btn);
addMap = (Button)findViewById(R.id.add_map_place);
selectFiles = (Button)findViewById(R.id.add_files);
//Listeners
uploadBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new PostTask().execute("http://www.petrichors.com/eguide/upload_media_test.php");
}
});
selectFiles.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openGallery(2);
}
});
addMap.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(AddPlaceActivity.this,AddPlaceMap.class);
startActivityForResult(intent,1);
}
});
}
public void openGallery(int req_code){
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
String[] mimetypes = {"image/*", "video/*"};
intent.putExtra(Intent.EXTRA_MIME_TYPES, mimetypes);
startActivityForResult(intent, req_code);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_add_place, menu);
return true;
}
// Call Back method to get the Message form Map Activity
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
// check if the request code is same as what is passed here it is 2
if (resultCode == RESULT_OK) {
if(requestCode==1)
{
// String message=data.getStringExtra("MESSAGE");
lat = data.getDoubleExtra("Lat",0.0);
lng = data.getDoubleExtra("Lng",0.0);
//show();
}
//
if (requestCode == 2)
{
Uri selectedFileUri = data.getData();
File myFile = new File(selectedFileUri.getPath());
FilesToUpload.add(myFile);
}
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private void show(){
Toast.makeText(this, lat + " : " + lng, Toast.LENGTH_LONG).show();
}
// The definition of our task class
private class PostTask extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
Log.i("Async : ","PRe Exec");
pDialog = new ProgressDialog(AddPlaceActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... params) {
// for debug worker thread
if(android.os.Debug.isDebuggerConnected())
android.os.Debug.waitForDebugger();
Log.i("Async : ","Do back");
String url=params[0];
doPlaceUpload(url);
return "All Done!";
}
//Upload Function
private void doPlaceUpload(String Url){
Log.i("Async : ","Do placeUpload");
String urlString = Url;
try
{
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(urlString);
FileBody bin1 = new FileBody(FilesToUpload.get(0));
MultipartEntity reqEntity = new MultipartEntity();
reqEntity.addPart("uploadedfile1", bin1);
reqEntity.addPart("user", new StringBody("User"));
post.setEntity(reqEntity);
HttpResponse response = client.execute(post);
resEntity = response.getEntity();
final String response_str = EntityUtils.toString(resEntity);
if (resEntity != null) {
Log.i("RESPONSE",response_str);
runOnUiThread(new Runnable(){
public void run() {
try {
// Toast.makeText(getApplicationContext(),response_str, Toast.LENGTH_LONG).show();
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
catch (Exception ex){
String ExceptionString = ex.getMessage();
Log.e("Debug", "UploadError: " + ex.getMessage(), ex);
}
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
Log.i("Async : ","P-UPDATE");
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
Log.i("Async : ","POSt Exec");
if (pDialog.isShowing())
pDialog.dismiss();
}
}
}
我的问题是如何从ACTION_OPEN_DOCUMENT获取文件并将其保存在ArrayList中，就像我的情况FilesToUpload一样。因为文档可能包含视频以及图像如何分别处理它们。
答案 0 :(得分：0)
我想我无法从绝对路径获取文件
没有＆＃34;绝对路径＆＃34;。 ACTION_OPEN_DOCUMENT无法打开文件。它打开了一条内容。该内容由Uri中的onActivityResult()表示。 The documentation for the Storage Access Framework向您展示了如何使用Uri，例如使用ContentResolver和openInputStream()。
另见：