我正在尝试获取图库或相机中图像的绝对路径。
相机意图打开后，我点击图像＆amp;我试图从URI获取文件路径。请参阅代码位。
//In the OnActivityResult:
Uri uri = data.getData();
File myFile = new File(uri.getPath());
File imageFilePath = new File(getRealPathFromURI(uri));
//The method to fetch path:
private String getRealPathFromURI(Uri contentURI) {
String result;
Cursor cursor = getContentResolver().query(contentURI, null, null, null, null);
Log.d("", "cursor = " +cursor);
if (cursor == null) { // Source is Dropbox or other similar local file path
result = contentURI.getPath();
} else {
int idx = cursor.getColumnIndex(MediaStore.Images.Media.DATA ); // Is this the wrong way to get the image cursor?
Log.d("", "came here = " +idx); // Here idx us -1!!!
cursor.moveToFirst();
result = cursor.getString(idx);
cursor.close();
}
return result;
}
// image pick intent
public void imageFromGallery() {
Intent intent = new Intent();
// Show only images, no videos or anything else
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
// Always show the chooser (if there are multiple options available)
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
}
添加logCat：
721-4721/com.coolhydro.copy E/CursorWindow﹕ Failed to read row 0, column -1 from a CursorWindow which has 1 rows, 6 columns.
10-11 18:53:55.495 4721-4721/com.coolhydro.copy D/AndroidRuntime﹕ Shutting down VM
10-11 18:53:55.495 4721-4721/com.coolhydro.copy E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.coolhydro.copy, PID: 4721
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://com.android.providers.media.documents/document/image:49 flg=0x1 }} to activity {com.coolhydro.copy/com.coolhydro.copy.MainActivity}: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
at android.app.ActivityThread.deliverResults(ActivityThread.java:3699)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3742)
at android.app.ActivityThread.-wrap16(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
at android.database.CursorWindow.nativeGetString(Native Method)
at android.database.CursorWindow.getString(CursorWindow.java:438)
at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51 )
at android.database.CursorWrapper.getString(CursorWrapper.java:137)
at com.coolhydro.copy.MainActivity.getRealPathFromURI(MainActivity.java:80)
at com.coolhydro.copy.MainActivity.onActivityResult(MainActivity.java:52)
at android.app.Activity.dispatchActivityResult(Activity.java:6428)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3695)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3742)
at android.app.ActivityThread.-wrap16(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
10-11 18:54:01.237 4721-4730/com.coolhydro.copy W/CursorWrapperInner﹕ Cursor finalized without prior close()
10-11 18:58:55.523 4721-4721/? I/Process﹕ Sending signal. PID: 4721 SIG: 9
谢谢！
答案 0 :(得分：1)
您需要将投影传递给查询调用。按原样，返回没有列的游标，因此当您尝试查找某列的索引时，返回-1。尝试使用
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(contentURI, projection, null, null, null);
然后，当您想要检索数据时，您已经知道列索引（它是投影数组中该列的索引），因此您只需设置
int idx = 0;
答案 1 :(得分：1)
当我从画廊和相机请求图片时，我有这个代码：
Intent pickIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
pickIntent.setType("image/*");
Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(fileCameraCapturedImage));
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[]{captureIntent}
);
startActivityForResult(chooserIntent, REQUEST_CODE_ADD_PHOTO);
在我的onActivityResult()我检查返回的数据来自画廊或相机，然后我使用它：
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == RESULT_OK){
if(requestCode == REQUEST_CODE_ADD_PHOTO) {
Log.v(TAG, "Photo ok! " + data);
boolean isCamera;
//getclip data requires API 16
if (Build.VERSION.SDK_INT >= 16){
if (data == null || (data.getData() == null && data.getClipData() == null)) {
isCamera = true;
} else {
final String action = data.getAction();
if (action == null) {
isCamera = false;
} else {
isCamera = action.equals(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
}
}
}
else{
if (data == null || data.getData() == null) {
isCamera = true;
} else {
final String action = data.getAction();
if (action == null) {
isCamera = false;
} else {
isCamera = action.equals(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
}
}
}
Log.v(TAG, "is camera: " + isCamera);
if(!isCamera) {
//gallery result
Uri selectedImageUri = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImageUri, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
Log.v(TAG,"Path: "+filePath);
if(filePath !=null) {
if(!filePath.equalsIgnoreCase("")) {
imagePath = filePath;
Picasso.with(getApplicationContext()).load("file://" + imagePath).into(ivPhotoContainer);
btnAddChange.setText("Change");
}
}
}
else {
//is camera result
Log.v(TAG, "is camera result");
String path = fileCameraCapturedImage.getAbsolutePath();
imagePath = path;
// ivPhotoContainer.setImageBitmap(thumbnail);
Picasso.with(getApplicationContext()).load("file://"+imagePath).into(ivPhotoContainer);
btnAddChange.setText("Change");
}
}
}
}
注意：fileCameraCapturedImage的类型为file，它引用捕获的图像将保存在设备上的文件。
私人文件fileCameraCapturedImage = new File(Environment.getExternalStorageDirectory()+File.separator+"capturedImage.jpg");