通过从MediaStore.ACTION_IMAGE_CAPTURE中选取图像来创建文件 [英] Creating a file from picking an image from MediaStore.ACTION_IMAGE_CAPTURE
问题描述
意图pickIntent = new Intent（）;
pickIntent.setType（image / *）;
pickIntent.setAction（Intent.ACTION_GET_CONTENT）;
Intent takePhotoIntent = new Intent（MediaStore.ACTION_IMAGE_CAPTURE）;
字符串pickTitle =选择或拍摄新照片; //或者从strings.xml获取
Intent chooserIntent = Intent.createChooser（pickIntent，pickTitle）;
chooserIntent.putExtra
（
Intent.EXTRA_INITIAL_INTENTS，
new Intent [] {takePhotoIntent}
）;
startActivityForResult（chooserIntent，SELECT_PICTURE）;
在 onActivityResult 中我想创建一个从所选图像中新建文件。这是我正在做的：
$ pre $ @ $ $ b $公共无效onActivityResult（int requestCode，int resultCode，意图数据） {
super.onActivityResult（requestCode，resultCode，data）;
if（requestCode == 1&& resultCode == Activity.RESULT_OK）{
if（data == null）{
return;
}
Uri selectedImageUri = data.getData（）;
文件mediaFile =新文件（selectedImageUri.getPath（））; $！
$ b if（！mediaFile.exists（））
Log.d（File，File does not exist）;
我检查 mediaFile.exists （）返回false。我在这里做错了什么？
更新
well：
字符串fullPath = getRealPathFromURI（selectedImageUri）;
用在这里输入链接描述问题：
public String getRealPathFromURI（Uri contentUri）{
Cursor cursor = null;
尝试{
String [] proj = {MediaStore.Images.Media.DATA};
cursor = getContentResolver（）。query（contentUri，proj，null，null，null）;
int column_index = cursor.getColumnIndexOrThrow（MediaStore.Images.Media.DATA）;
cursor.moveToFirst（）;
返回cursor.getString（column_index）;
} catch（Exception e）{
e.printStackTrace（）;
} finally {
if（cursor！= null）{
cursor.close（）;
}
}
返回null;
}
但是，这个方法返回null。
<
public class RealPathUtil
{
@SuppressLint（NewApi）
public static String getRealPathFromURI_API19（Context context，Uri uri）{
String filePath =;
字符串wholeID = DocumentsContract.getDocumentId（uri）;
//在冒号处分割，在数组中使用第二项
String id = wholeID.split（：）[1];
String [] column = {MediaStore.Images.Media.DATA};
//其中id等于
String sel = MediaStore.Images.Media._ID +=？;
cursor cursor = context.getContentResolver（）。query（MediaStore.Images.Media.EXTERNAL_CONTENT_URI，
column，sel，new String [] {id}，null）;
int columnIndex = cursor.getColumnIndex（column [0]）;
if（cursor.moveToFirst（））{
filePath = cursor.getString（columnIndex）;
}
cursor.close（）;
返回filePath;
$ b @SuppressLint（NewApi）
public static String getRealPathFromURI_API11to18（Context context，Uri contentUri）{
String [] proj = { MediaStore.Images.Media.DATA};
String result = null;
CursorLoader cursorLoader = new CursorLoader（
context，
contentUri，proj，null，null，null）;
Cursor cursor = cursorLoader.loadInBackground（）;
if（cursor！= null）{
int column_index =
cursor.getColumnIndexOrThrow（MediaStore.Images.Media.DATA）;
cursor.moveToFirst（）;
result = cursor.getString（column_index）;
}
返回结果;
public static String getRealPathFromURI_BelowAPI11（Context context，Uri contentUri）{
String [] proj = {MediaStore.Images.Media.DATA};
Cursor cursor = context.getContentResolver（）。query（contentUri，proj，null，null，null）;
int column_index = cursor.getColumnIndexOrThrow（MediaStore.Images.Media.DATA）;
cursor.moveToFirst（）;
返回cursor.getString（column_index）;
$ / code $ / pre
< p>使用android的相对方法从uri获取图像路径api。
:检查您的手机的SDK版本
路径使用
int version = Build.VERSION.SDK_INT;
字符串fullPath;
if（version> = 19）{
// call api 19 code here
fullPath = getRealPathFromURI_API19（this，uri）;
} else if（version <= 18&& version> = 11）{
// call api 11-18 code here
fullPath = getRealPathFromURI_API11to18（this，uri）;
} else {
//在api下面调用11代码
fullPath = getRealPathFromURI_BelowAPI11（this，uri）;
}
文件mediaFile = new File（fullPath）;
参考这个
I'm allowing the user to pick an image from their photo gallery:
Intent pickIntent = new Intent();
pickIntent.setType("image/*");
pickIntent.setAction(Intent.ACTION_GET_CONTENT);
Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
String pickTitle = "Select or take a new Picture"; // Or get from strings.xml
Intent chooserIntent = Intent.createChooser(pickIntent, pickTitle);
chooserIntent.putExtra
(
Intent.EXTRA_INITIAL_INTENTS,
new Intent[] { takePhotoIntent }
);
startActivityForResult(chooserIntent, SELECT_PICTURE);
And in onActivityResult I want to create a new File from the selected image. Here is what I am doing:
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == Activity.RESULT_OK) {
if (data == null) {
return;
}
Uri selectedImageUri = data.getData();
File mediaFile = new File(selectedImageUri.getPath());
if(!mediaFile.exists())
Log.d("File", "File doesn't exist");
}
}
My check mediaFile.exists() is returning false. What am I doing wrong here?
Update
I tried doing this as well:
String fullPath = getRealPathFromURI(selectedImageUri);
with this method from enter link description here question:
public String getRealPathFromURI(Uri contentUri) {
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = getContentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (cursor != null) {
cursor.close();
}
}
return null;
}
However, this method returns null.
Add this class to your project.
public class RealPathUtil {
@SuppressLint("NewApi")
public static String getRealPathFromURI_API19(Context context, Uri uri){
String filePath = "";
String wholeID = DocumentsContract.getDocumentId(uri);
// Split at colon, use second item in the array
String id = wholeID.split(":")[1];
String[] column = { MediaStore.Images.Media.DATA };
// where id is equal to
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[]{ id }, null);
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
return filePath;
}
@SuppressLint("NewApi")
public static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
String[] proj = { MediaStore.Images.Media.DATA };
String result = null;
CursorLoader cursorLoader = new CursorLoader(
context,
contentUri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();
if(cursor != null){
int column_index =
cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
result = cursor.getString(column_index);
}
return result;
}
public static String getRealPathFromURI_BelowAPI11(Context context, Uri contentUri) {
String[] proj = { MediaStore.Images.Media.DATA };
Cursor cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
}
and get image path from uri using relative method of android api.
EDIT :: Check SDK Version of your phone
And get path using
int version = Build.VERSION.SDK_INT;
String fullPath;
if(version >= 19) {
//call api 19 code here
fullPath = getRealPathFromURI_API19(this, uri);
} else if(version <= 18 && version >= 11) {
// call api 11-18 code here
fullPath = getRealPathFromURI_API11to18(this, uri);
} else {
// call below api 11 code here
fullPath = getRealPathFromURI_BelowAPI11(this, uri);
}
File mediaFile = new File(fullPath);
Reference from this
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