我正在创建一个Android应用程序，它从相机中获取图像并将其保存在库中。我想要的是获得保存图像的路径。我尝试过使用intent.getData（）但是没有工作..
答案 0 :(得分：1)
我尝试过使用intent.getData（）但是没有工作..
您将获得一些三星设备中的intent as NULL，例如三星Galaxy S3与Android操作系统版本4.1.1。
我已经面对这个问题并通过以下方式解决它你可以尝试一下，如果它可以帮助你。
调用图像捕获意图时：
String storageState = Environment.getExternalStorageState();
if (storageState.equals(Environment.MEDIA_MOUNTED)) {
Intent intent = new Intent(
MediaStore.ACTION_IMAGE_CAPTURE);
String filename = System.currentTimeMillis() + ".jpg";
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, filename);
mImageCaptureUri = getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
values);
intent.putExtra(
android.provider.MediaStore.EXTRA_OUTPUT,
mImageCaptureUri);
try {
startActivityForResult(intent, PICK_FROM_CAMERA);
} catch (ActivityNotFoundException e) {
e.printStackTrace();
}
} else {
new AlertDialog.Builder(BuildInukshk_4_Camera.this)
.setMessage(
"External Storeage (SD Card) is required.\n\nCurrent state: "
+ storageState)
.setCancelable(true).create().show();
}
} else { // pick from file
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,
"Complete action using"), PICK_FROM_FILE);
}
内部OnActivityResult方法：
case PICK_FROM_CAMERA:
Log.i("TAG", "Inside PICK_FROM_CAMERA");
// Final Code As Below
try {
Log.i("TAG", "inside Samsung Phones");
String[] projection = {
MediaStore.Images.Thumbnails._ID, // The columns we want
MediaStore.Images.Thumbnails.IMAGE_ID,
MediaStore.Images.Thumbnails.KIND,
MediaStore.Images.Thumbnails.DATA };
String selection = MediaStore.Images.Thumbnails.KIND + "=" + // Select
// only
// mini's
MediaStore.Images.Thumbnails.MINI_KIND;
String sort = MediaStore.Images.Thumbnails._ID + " DESC";
// At the moment, this is a bit of a hack, as I'm returning ALL
// images, and just taking the latest one. There is a better way
// to
// narrow this down I think with a WHERE clause which is
// currently
// the selection variable
Cursor myCursor = this.managedQuery(
MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
projection, selection, null, sort);
long imageId = 0l;
long thumbnailImageId = 0l;
String thumbnailPath = "";
try {
myCursor.moveToFirst();
imageId = myCursor
.getLong(myCursor
.getColumnIndexOrThrow(MediaStore.Images.Thumbnails.IMAGE_ID));
thumbnailImageId = myCursor
.getLong(myCursor
.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID));
thumbnailPath = myCursor
.getString(myCursor
.getColumnIndexOrThrow(MediaStore.Images.Thumbnails.DATA));
} finally {
// myCursor.close();
}
// Create new Cursor to obtain the file Path for the large image
String[] largeFileProjection = {
MediaStore.Images.ImageColumns._ID,
MediaStore.Images.ImageColumns.DATA };
String largeFileSort = MediaStore.Images.ImageColumns._ID
+ " DESC";
myCursor = this.managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
largeFileProjection, null, null, largeFileSort);
String largeImagePath = "";
try {
myCursor.moveToFirst();
// This will actually give yo uthe file path location of the
// image.
largeImagePath = myCursor
.getString(myCursor
.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.DATA));
mImageCaptureUri_samsung = Uri.fromFile(new File(
largeImagePath));
mImageCaptureUri = null;
} finally {
// myCursor.close();
}
// These are the two URI's you'll be interested in. They give
// you a
// handle to the actual images
Uri uriLargeImage = Uri.withAppendedPath(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
String.valueOf(imageId));
Uri uriThumbnailImage = Uri.withAppendedPath(
MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
String.valueOf(thumbnailImageId));
// I've left out the remaining code, as all I do is assign the
// URI's
// to my own objects anyways...
} catch (Exception e) {
mImageCaptureUri_samsung = null;
Log.i("TAG",
"inside catch Samsung Phones exception " + e.toString());
}
try {
Log.i("TAG",
"URI Samsung:" + mImageCaptureUri_samsung.getPath());
} catch (Exception e) {
Log.i("TAG", "Excfeption inside Samsung URI :" + e.toString());
}
try {
Log.i("TAG", "URI Normal:" + mImageCaptureUri.getPath());
} catch (Exception e) {
Log.i("TAG", "Excfeption inside Normal URI :" + e.toString());
}
break;
运行以下代码后，您将获得两个URI mImageCaptureUri_samsung和mImageCaptureUri
如果您使用简单设备运行应用程序，您将获得mImageCaptureUri作为路径，如果您使用的设备与三星Galaxy S3一起运行，您将获得mImageCaptureUri_samsung中的Cpatured Image路径。
此外，您可以继续执行您的准则。它对我来说非常好用我测试过的所有设备。
如果有人遇到上述代码问题，他们可以参考下面很棒的链接Solution of Samsung Galaxy S3
希望它会有所帮助。
答案 1 :(得分：0)
试试这个：
public class Camera extends Activity {
private static final int CAMERA_REQUEST = 1888;
private String selectedImagePath;
String fileName = "capturedImage.jpg";
private static Uri mCapturedImageURI;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
TakePhoto();
}
public void TakePhoto()
{
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
mCapturedImageURI = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
values);
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (resultCode == RESULT_OK)
{
if (requestCode == CAMERA_REQUEST)
{
selectedImagePath = getPath(mCapturedImageURI);
Log.v("selectedImagePath: ", ""+selectedImagePath);
//Save the path to pass between activities
}
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
}
答案 2 :(得分：0)
这就是我的表现： 首先创建图像uri并且意图ACTION_IMAGE_CAPTURE传递带有此值的额外MediaStore.EXTRA_OUTPUT。
captureButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
capturedImageURI = ImageUtils.takePicture(ReceiptFormActivity.this);
}
});
然后onActivityResult将此uri路径转换为String路径并调用将从此字符串路径获取位图并将其设置在imageView上的方法。
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CONSTANTS.TAKE_PICTURE)
{
if (resultCode == RESULT_OK)
{
if(capturedImageURI != null)
{
Utils.imagePath = ImageUtils.getStringPathFromURI(ReceiptFormActivity.this, capturedImageURI);;
setThumbnail();
}
}
}
}
void setThumbnail()
{
try{
if(Utils.imagePath != null)
{
((TextView)findViewById(R.id.display_image)).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
File f = new File(Utils.imagePath);
if(f.exists())
{
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri imgUri = Uri.fromFile(f);
intent.setDataAndType(imgUri, "image/*");
startActivityForResult(intent,2000);
}
}
});
File imgFilePath = new File(Utils.imagePath);
if(imgFilePath != null && imgFilePath.exists())
{
Bitmap bitmap = ImageUtils.decodeFile(imgFilePath, CONSTANTS.THUMBNAIL_HEIGHT, CONSTANTS.THUMBNAIL_WIDTH);
if(bitmap != null)
{
receipt_thumbnail.setImageBitmap(bitmap);
return;
}
}
}
}
catch (Exception e) {
receipt_thumbnail.setImageResource(R.drawable.some_img);
}
/*
* default img incase of not any exception and no bitmap either.
*/
receipt_thumbnail.setImageResource(R.drawable.some_img);
}
ImageUtils.java
public class ImageUtils {
public static Uri takePicture(Context context)
{
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, "Receipt_" + System.currentTimeMillis());
Uri mCapturedImageURI = context.getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
Intent intentPicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intentPicture.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
((Activity) context).startActivityForResult(intentPicture,CONSTANTS.TAKE_PICTURE);
return mCapturedImageURI;
}
public static String getStringPathFromURI(Context context, Uri contentUri)
{
try
{
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);
}
catch (Exception e)
{
return contentUri.getPath();
}
}
public static Bitmap decodeFile(File f, int thumbnailReqHeight, int thumbnailReqWidth)
{
Bitmap b = null;
try {
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
FileInputStream fis = new FileInputStream(f);
BitmapFactory.decodeStream(fis, null, o);
fis.close();
int scale = 1;
if (o.outHeight > thumbnailReqHeight || o.outWidth > thumbnailReqWidth)
{
scale = (int)Math.pow(2, (int) Math.round(Math.log(thumbnailReqHeight / (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5)));
}
//Decode with inSampleSize
o.inJustDecodeBounds = false;
o.inSampleSize = scale;
fis = new FileInputStream(f);
b = BitmapFactory.decodeStream(fis, null, o);
fis.close();
} catch (IOException e) {
}
return b;
}
}
答案 3 :(得分：0)
代码非常好。尝试在android清单中给予android.permission.WRITE_EXTERNAL_STORAGE和android.permission.READ_EXTERNAL_STORAGE权限。