Android 无法解码流：java.io.FileNotFoundException（权限被拒绝）
我试图一次从图库上传多张图片。给这里。我面临的问题是将字符串转换为位图。我犯了以下错误 E/BitmapFactory:无法解码流：java.io.FileNotFoundException:/storage/emulated/0/DCIM/Screenshots/Screenshot_2018-11-05-14-59-33-023_com.android.mms.png（权限被拒绝） 错误发生在此处。Android 无法解码流：java.io.FileNotFoundException（权限被拒绝）,android,android-bitmap,Android,Android Bitmap,我试图一次从图库上传多张图片。给这里。我面临的问题是将字符串转换为位图。我犯了以下错误 E/BitmapFactory:无法解码流：java.io.FileNotFoundException:/storage/emulated/0/DCIM/Screenshots/Screenshot_2018-11-05-14-59-33-023_com.android.mms.png（权限被拒绝） 错误发生在此处。 buttonmultiUpload.setOnClickListener(new View
buttonmultiUpload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Upload button is clicked" + imagesEncodedList, Toast.LENGTH_LONG).show();
Log.e("list","imagesEncodedList" + imagesEncodedList );
for( String imagePath: imagesEncodedList){
try {
Log.e("imagePath","imagePath" + imagePath );
Bitmap bitmap2 = PhotoLoader.init().from(imagePath).requestSize(512, 512).getBitmap();
final String encodedString = ImageBase64.encode(bitmap2);
Log.e("bitmap","bitmap" + bitmap2 );
String url = "http://myserver.com/imageuploadtest/upload.php";
StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Toast.makeText(getApplicationContext(), response, Toast.LENGTH_SHORT).show();
// gvGallery.setAdapter(null);
new AlertDialog.Builder(MainActivity.this).setTitle("Succesful")
.setMessage("Multiple Prescription of Outdoor has been submitted")
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).show();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(), "Error while uploading image", Toast.LENGTH_SHORT).show();
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("image", encodedString);
params.put("empcode", emp_code);
return params;
}
};
myCommand.add(stringRequest);
} catch (FileNotFoundException e) {
Toast.makeText(getApplicationContext(), "Error while loading image", Toast.LENGTH_SHORT).show();
}
}
myCommand.execute();
}
});
buttonmultiUpload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Upload button is clicked" + imagesEncodedList, Toast.LENGTH_LONG).show();
Log.e("list","imagesEncodedList" + imagesEncodedList );
for( String imagePath: imagesEncodedList){
try {
Log.e("imagePath","imagePath" + imagePath );
Bitmap bitmap2 = PhotoLoader.init().from(imagePath).requestSize(512, 512).getBitmap();
final String encodedString = ImageBase64.encode(bitmap2);
Log.e("bitmap","bitmap" + bitmap2 );
String url = "http://myserver.com/imageuploadtest/upload.php";
StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Toast.makeText(getApplicationContext(), response, Toast.LENGTH_SHORT).show();
// gvGallery.setAdapter(null);
new AlertDialog.Builder(MainActivity.this).setTitle("Succesful")
.setMessage("Multiple Prescription of Outdoor has been submitted")
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).show();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(), "Error while uploading image", Toast.LENGTH_SHORT).show();
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("image", encodedString);
params.put("empcode", emp_code);
return params;
}
};
myCommand.add(stringRequest);
} catch (FileNotFoundException e) {
Toast.makeText(getApplicationContext(), "Error while loading image", Toast.LENGTH_SHORT).show();
}
}
myCommand.execute();
}
});
buttonmultiUpload.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
Toast.makeText（getApplicationContext（），“单击上载按钮”+imagesEncodedList，Toast.LENGTH_LONG）.show（）；
Log.e（“列表”、“imagesEncodedList”+imagesEncodedList）；
用于（字符串imagePath:imagesEncodedList）{
试一试{
Log.e（“imagePath”、“imagePath”+imagePath）；
位图bitmap2=PhotoLoader.init（）.from（imagePath）.requestSize（512,512）.getBitmap（）；
最终字符串encodedString=ImageBase64.encode（位图2）；
Log.e（“位图”、“位图”+位图2）；
字符串url=”http://myserver.com/imageuploadtest/upload.php";
StringRequest StringRequest=new StringRequest（Request.Method.POST，url，new Response.Listener（））{
@凌驾
公共void onResponse（字符串响应）{
Toast.makeText（getApplicationContext（），response，Toast.LENGTH_SHORT.show（）；
//gvGallery.setAdapter（空）；
新建AlertDialog.Builder（MainActivity.this）.setTitle（“成功”）
.setMessage（“已提交多个户外处方”）
.setPositiveButton（“确定”，新的DialogInterface.OnClickListener（）{
@凌驾
public void onClick（DialogInterface dialog，int which）{
}
}).show（）；
}
}，new Response.ErrorListener（）{
@凌驾
公共无效onErrorResponse（截击错误）{
Toast.makeText（getApplicationContext（），“上载图像时出错”，Toast.LENGTH_SHORT.show（）；
}
}){
@凌驾
受保护的映射getParams（）引发AuthFailureError{
Map params=新的HashMap（）；
参数put（“图像”，编码字符串）；
参数put（“emp代码”，emp_代码）；
返回参数；
}
};
myCommand.add（stringRequest）；
}catch（filenotfounde异常）{
Toast.makeText（getApplicationContext（），“加载图像时出错”，Toast.LENGTH_SHORT.show（）；
}
}
myCommand.execute（）；
}
});
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
{
Toast.makeText(getApplicationContext(), "Clicked for multiple image", Toast.LENGTH_LONG).show();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
imagesEncodedList = new ArrayList<String>();
if(data.getData()!=null){
Uri mImageUri=data.getData();
try {
bitmap=BitmapFactory.decodeStream(getContentResolver().openInputStream(mImageUri));
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), mImageUri);
} catch (IOException e) {
e.printStackTrace();
}
setToImageView(getResizedBitmap(bitmap, 2048));
Cursor cursor = getContentResolver().query(mImageUri, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
imageEncoded = cursor.getString(columnIndex);
cursor.close();
ArrayList<Uri> mArrayUri = new ArrayList<Uri>();
mArrayUri.add(mImageUri);
galleryAdapter = new GalleryAdapter(getApplicationContext(),mArrayUri);
gvGallery.setAdapter(galleryAdapter);
gvGallery.setVerticalSpacing(gvGallery.getHorizontalSpacing());
ViewGroup.MarginLayoutParams mlp = (ViewGroup.MarginLayoutParams) gvGallery.getLayoutParams();
mlp.setMargins(0, gvGallery.getHorizontalSpacing(), 0, 0);
} else {
if (data.getClipData() != null) {
ClipData mClipData = data.getClipData();
ArrayList<Uri> mArrayUri = new ArrayList<Uri>();
for (int i = 0; i < mClipData.getItemCount(); i++) {
ClipData.Item item = mClipData.getItemAt(i);
Uri uri = item.getUri();
mArrayUri.add(uri);
Cursor cursor = getContentResolver().query(uri, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
imageEncoded = cursor.getString(columnIndex);
imagesEncodedList.add(imageEncoded);
cursor.close();
galleryAdapter = new GalleryAdapter(getApplicationContext(),mArrayUri);
gvGallery.setAdapter(galleryAdapter);
gvGallery.setVerticalSpacing(gvGallery.getHorizontalSpacing());
ViewGroup.MarginLayoutParams mlp = (ViewGroup.MarginLayoutParams) gvGallery.getLayoutParams();
mlp.setMargins(0, gvGallery.getHorizontalSpacing(), 0, 0);
}
Log.v("LOG_TAG", "Selectedmages " + mArrayUri.size());
Log.v("LOG_TAG", "Selectedmages " + imagesEncodedList );
Log.v("LOG_TAG", "Selectedmages " + bitmap );
}
}
}
activityresult上受保护的void（int-requestCode、int-resultCode、Intent-data）{
super.onActivityResult（请求代码、结果代码、数据）；
{
Toast.makeText（getApplicationContext（），“单击可获得多个图像”，Toast.LENGTH_LONG.show（）；
字符串[]filePathColumn={MediaStore.Images.Media.DATA}；
imagesEncodedList=新的ArrayList（）；
if（data.getData（）！=null）{
Uri mimageri=data.getData（）；
试一试{
位图=BitmapFactory.decodeStream（getContentResolver（）.openInputStream（Mimageri））；
位图=MediaStore.Images.Media.getBitmap（getContentResolver（），mimageri）；
}捕获（IOE异常）{
e、 printStackTrace（）；
}
setToImageView（getResizedBitmap（位图，2048））；
Cursor Cursor=getContentResolver（）.query（mimageri，filePathColumn，null，null）；
cursor.moveToFirst（）；
int columnIndex=cursor.getColumnIndex（filePathColumn[0]）；
imageEncoded=cursor.getString（columnIndex）；
cursor.close（）；
ArrayList mArrayUri=新的ArrayList（）；
mArrayUri.add（mImageUri）；
galleryAdapter=新galleryAdapter（getApplicationContext（），mArrayUri）；
gvGallery.setAdapter（galleryAdapter）；
gvGallery.setVerticalSpacing（gvGallery.getHorizontalSpacing（））；
ViewGroup.MarginLayoutParams mlp=（ViewGroup.MarginLayoutParams）gvGallery.getLayoutParams（）；
setMargins（0，gvGallery.getHorizontalSpacing（），0，0）；
}否则{
if（data.getClipData（）！=null）{
ClipData mClipData=data.getClipData（）；
ArrayList mArrayUri=新的ArrayList（）；
对于（int i=0；i@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case 1:
{
if (grantResults.length > 0 &&
grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, do something you want
} else {
// permission denied
Toast.makeText(MainActivity.this, "Permission denied to read your External storage", Toast.LENGTH_SHORT).show();
}
return;
}
}
}
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
if (ContextCompat.checkSelfPermission(thisActivity,Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED) {
// Permission is not granted
if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
} else {
// No explanation needed; request the permission
ActivityCompat.requestPermissions(thisActivity,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
MY_PERMISSIONS_WRITE_EXTERNAL_STORAGE);
}
}