拍照后无法从相机接收 Intent.extras()
Can't receive Intent.extras() from Camera after making a photo
我发现拍摄照片和接收全尺寸照片而不是缩略图是一个常见问题（根据：http://developer.android.com/training/camera/photobasics.html）。拍照和接收缩略图很容易，但教程的其余部分似乎不完整且无法正常工作。有人用简单的方法解决了吗？
public class TakePhoto extends Activity{
static final int REQUEST_IMAGE_CAPTURE = 1;
static final int REQUEST_TAKE_PHOTO = 1;
private String mCurrentPhotoPath;
private ImageView mImageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.take_photo);
mImageView = (ImageView) findViewById(R.id.imageView);
dispatchTakePictureIntent();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
mImageView.setImageBitmap(imageBitmap);
}
}
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
Log.i("ASD", ex.toString());
}
// Continue only if the File was successfully created
if (photoFile != null) {
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}
}
04-25 18:01:14.239 17281-17281/com.(package).bazaar E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.(package).bazaar, PID: 17281
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.(package).bazaar/com.(package).bazaar.TakePhoto}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Bundle android.content.Intent.getExtras()' on a null object reference
at android.app.ActivityThread.deliverResults(ActivityThread.java:3626)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3669)
at android.app.ActivityThread.access00(ActivityThread.java:148)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5312)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Bundle android.content.Intent.getExtras()' on a null object reference
at com.klangstudios.bazaar.TakePhoto.onActivityResult(TakePhoto.java:46)
at android.app.Activity.dispatchActivityResult(Activity.java:6161)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3622)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3669)
at android.app.ActivityThread.access00(ActivityThread.java:148)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5312)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
我不希望 data 在那里 null。但是，Intent 上应该没有任何额外内容。如果您 不是 指定 EXTRA_OUTPUT，则您只查找 "data" extra。如果您指定 EXTRA_OUTPUT，您将从您在 EXTRA_OUTPUT 中提供的路径获取照片，并忽略传递给 onActivityResult() 的 Intent。
关于 null data Intent 本身，这可能是您正在使用的相机应用程序所特有的。请记住，使用 ACTION_IMAGE_CAPTURE 意味着您依赖第三方应用拍照，而第三方应用可能存在错误。
这可能有帮助：Android Camera Intent: how to get full sized photo?
尽管正在执行的是读取您在启动相机意图之前创建的文件，而不是读取 data
我在与 "jean d'arme" 相同的问题上苦苦挣扎了好几个小时，只是我寻求的是 URI 而不是位图。为了避免其他用户浪费时间，我将突出显示帮助我解决错误的 "jean d'arme" 和 "Felipe Augusto" 的说明，步骤如下：
1) 在你的class
中添加一个全局变量
private Uri uri;
2) 在dispatchTakePictureIntent()中使用这个变量获取photoURI的内容
private void dispatchTakePictureIntent() {
{...}
if (photoFile != null) {
uri = photoURI;
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
3) 在 onActivityResult 方法中使用这个 Uri 来完成你想要的任何任务
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
//Perform any task using uri
//For example set this URI to fill an ImageView like below
this.imageView.setImageURI(uri);
}
}
我希望这个亮点对你们中的一些人有所帮助！
我发现拍摄照片和接收全尺寸照片而不是缩略图是一个常见问题（根据：http://developer.android.com/training/camera/photobasics.html）。拍照和接收缩略图很容易，但教程的其余部分似乎不完整且无法正常工作。有人用简单的方法解决了吗？
public class TakePhoto extends Activity{
static final int REQUEST_IMAGE_CAPTURE = 1;
static final int REQUEST_TAKE_PHOTO = 1;
private String mCurrentPhotoPath;
private ImageView mImageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.take_photo);
mImageView = (ImageView) findViewById(R.id.imageView);
dispatchTakePictureIntent();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
mImageView.setImageBitmap(imageBitmap);
}
}
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
Log.i("ASD", ex.toString());
}
// Continue only if the File was successfully created
if (photoFile != null) {
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}
}
04-25 18:01:14.239 17281-17281/com.(package).bazaar E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.(package).bazaar, PID: 17281
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.(package).bazaar/com.(package).bazaar.TakePhoto}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Bundle android.content.Intent.getExtras()' on a null object reference
at android.app.ActivityThread.deliverResults(ActivityThread.java:3626)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3669)
at android.app.ActivityThread.access00(ActivityThread.java:148)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5312)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Bundle android.content.Intent.getExtras()' on a null object reference
at com.klangstudios.bazaar.TakePhoto.onActivityResult(TakePhoto.java:46)
at android.app.Activity.dispatchActivityResult(Activity.java:6161)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3622)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3669)
at android.app.ActivityThread.access00(ActivityThread.java:148)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5312)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
我不希望 data 在那里 null。但是，Intent 上应该没有任何额外内容。如果您 不是 指定 EXTRA_OUTPUT，则您只查找 "data" extra。如果您指定 EXTRA_OUTPUT，您将从您在 EXTRA_OUTPUT 中提供的路径获取照片，并忽略传递给 onActivityResult() 的 Intent。
关于 null data Intent 本身，这可能是您正在使用的相机应用程序所特有的。请记住，使用 ACTION_IMAGE_CAPTURE 意味着您依赖第三方应用拍照，而第三方应用可能存在错误。
这可能有帮助：Android Camera Intent: how to get full sized photo?
尽管正在执行的是读取您在启动相机意图之前创建的文件，而不是读取 data
我在与 "jean d'arme" 相同的问题上苦苦挣扎了好几个小时，只是我寻求的是 URI 而不是位图。为了避免其他用户浪费时间，我将突出显示帮助我解决错误的 "jean d'arme" 和 "Felipe Augusto" 的说明，步骤如下：
1) 在你的class
中添加一个全局变量private Uri uri;
2) 在dispatchTakePictureIntent()中使用这个变量获取photoURI的内容
private void dispatchTakePictureIntent() {
{...}
if (photoFile != null) {
uri = photoURI;
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
3) 在 onActivityResult 方法中使用这个 Uri 来完成你想要的任何任务
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
//Perform any task using uri
//For example set this URI to fill an ImageView like below
this.imageView.setImageURI(uri);
}
}
我希望这个亮点对你们中的一些人有所帮助！