在android上启动摄像头时无法传递结果信息
我正试图使用外部android摄像头将图像放入ImageView中,但出现了“未能交付结果信息”错误。这是我的密码: 单击按钮启动摄像头应用程序在android上启动摄像头时无法传递结果信息,android,android-intent,android-camera,image-capture,Android,Android Intent,Android Camera,Image Capture,我正试图使用外部android摄像头将图像放入ImageView中,但出现了“未能交付结果信息”错误。这是我的密码: 单击按钮启动摄像头应用程序 public void takePhoto(View v) { Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); if (takePictureIntent.resolveActivity(getPackageManager()) != n
public void takePhoto(View v) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Creating the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
Log.e(TAG,"something went wrong", ex);
return;
}
// Continue only if the File was successfully created
if (photoFile != null) {
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_CODE);
}
}
}
命名和创建临时文件。文件:
String mCurrentPhotoPath;
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
String imageFileName = "JPEG" + timeStamp + "";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
if(image.exists() == false) {
image.getParentFile().mkdirs();
image.createNewFile();
}
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
Log.d(TAG,mCurrentPhotoPath);
return image;
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// bla bla bla... I never get to this point.
Log.d(TAG,"request code: " + requestCode + "result code: " + resultCode);
}
06-03 14:35:50.121: E/AndroidRuntime(19125): FATAL EXCEPTION: main
06-03 14:35:50.121: E/AndroidRuntime(19125): Process: com.example.moimeme, PID: 19125
06-03 14:35:50.121: E/AndroidRuntime(19125): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.example.moimeme/com.example.moimeme.MainActivity}: java.lang.NullPointerException
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.deliverResults(ActivityThread.java:3365)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3408)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.access$1300(ActivityThread.java:135)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.os.Handler.dispatchMessage(Handler.java:102)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.os.Looper.loop(Looper.java:136)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.main(ActivityThread.java:5017)
06-03 14:35:50.121: E/AndroidRuntime(19125): at java.lang.reflect.Method.invokeNative(Native Method)
06-03 14:35:50.121: E/AndroidRuntime(19125): at java.lang.reflect.Method.invoke(Method.java:515)
06-03 14:35:50.121: E/AndroidRuntime(19125): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
06-03 14:35:50.121: E/AndroidRuntime(19125): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
06-03 14:35:50.121: E/AndroidRuntime(19125): at dalvik.system.NativeStart.main(Native Method)
06-03 14:35:50.121: E/AndroidRuntime(19125): Caused by: java.lang.NullPointerException
06-03 14:35:50.121: E/AndroidRuntime(19125): at com.example.moimeme.MainActivity.onActivityResult(MainActivity.java:75)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.Activity.dispatchActivityResult(Activity.java:5423)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.deliverResults(ActivityThread.java:3361)
06-03 14:35:50.121: E/AndroidRuntime(19125): ... 11 more
onactivityresult:
String mCurrentPhotoPath;
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
String imageFileName = "JPEG" + timeStamp + "";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
if(image.exists() == false) {
image.getParentFile().mkdirs();
image.createNewFile();
}
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
Log.d(TAG,mCurrentPhotoPath);
return image;
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// bla bla bla... I never get to this point.
Log.d(TAG,"request code: " + requestCode + "result code: " + resultCode);
}
06-03 14:35:50.121: E/AndroidRuntime(19125): FATAL EXCEPTION: main
06-03 14:35:50.121: E/AndroidRuntime(19125): Process: com.example.moimeme, PID: 19125
06-03 14:35:50.121: E/AndroidRuntime(19125): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.example.moimeme/com.example.moimeme.MainActivity}: java.lang.NullPointerException
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.deliverResults(ActivityThread.java:3365)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3408)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.access$1300(ActivityThread.java:135)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.os.Handler.dispatchMessage(Handler.java:102)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.os.Looper.loop(Looper.java:136)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.main(ActivityThread.java:5017)
06-03 14:35:50.121: E/AndroidRuntime(19125): at java.lang.reflect.Method.invokeNative(Native Method)
06-03 14:35:50.121: E/AndroidRuntime(19125): at java.lang.reflect.Method.invoke(Method.java:515)
06-03 14:35:50.121: E/AndroidRuntime(19125): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
06-03 14:35:50.121: E/AndroidRuntime(19125): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
06-03 14:35:50.121: E/AndroidRuntime(19125): at dalvik.system.NativeStart.main(Native Method)
06-03 14:35:50.121: E/AndroidRuntime(19125): Caused by: java.lang.NullPointerException
06-03 14:35:50.121: E/AndroidRuntime(19125): at com.example.moimeme.MainActivity.onActivityResult(MainActivity.java:75)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.Activity.dispatchActivityResult(Activity.java:5423)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.deliverResults(ActivityThread.java:3361)
06-03 14:35:50.121: E/AndroidRuntime(19125): ... 11 more
我的错误:
String mCurrentPhotoPath;
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
String imageFileName = "JPEG" + timeStamp + "";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
if(image.exists() == false) {
image.getParentFile().mkdirs();
image.createNewFile();
}
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
Log.d(TAG,mCurrentPhotoPath);
return image;
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// bla bla bla... I never get to this point.
Log.d(TAG,"request code: " + requestCode + "result code: " + resultCode);
}
06-03 14:35:50.121: E/AndroidRuntime(19125): FATAL EXCEPTION: main
06-03 14:35:50.121: E/AndroidRuntime(19125): Process: com.example.moimeme, PID: 19125
06-03 14:35:50.121: E/AndroidRuntime(19125): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.example.moimeme/com.example.moimeme.MainActivity}: java.lang.NullPointerException
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.deliverResults(ActivityThread.java:3365)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3408)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.access$1300(ActivityThread.java:135)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.os.Handler.dispatchMessage(Handler.java:102)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.os.Looper.loop(Looper.java:136)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.main(ActivityThread.java:5017)
06-03 14:35:50.121: E/AndroidRuntime(19125): at java.lang.reflect.Method.invokeNative(Native Method)
06-03 14:35:50.121: E/AndroidRuntime(19125): at java.lang.reflect.Method.invoke(Method.java:515)
06-03 14:35:50.121: E/AndroidRuntime(19125): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
06-03 14:35:50.121: E/AndroidRuntime(19125): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
06-03 14:35:50.121: E/AndroidRuntime(19125): at dalvik.system.NativeStart.main(Native Method)
06-03 14:35:50.121: E/AndroidRuntime(19125): Caused by: java.lang.NullPointerException
06-03 14:35:50.121: E/AndroidRuntime(19125): at com.example.moimeme.MainActivity.onActivityResult(MainActivity.java:75)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.Activity.dispatchActivityResult(Activity.java:5423)
06-03 14:35:50.121: E/AndroidRuntime(19125): at android.app.ActivityThread.deliverResults(ActivityThread.java:3361)
06-03 14:35:50.121: E/AndroidRuntime(19125): ... 11 more
我检查了不少堆栈问题,并相应地修改了代码,但无法使其正常工作,如果遗漏了任何内容,请道歉。顺便说一句,在Nexus5上进行了调试和测试
提前谢谢,还有。。。我刚开始使用android平台,请原谅代码中的错误:)我最终找到了解决方案。如果有人需要,就在这里发布 如果使用:
intent.putExtra(MediaStore.EXTRA_OUTPUT,
outputFileUri);
您正在传递额外的“额外输出”。当您传递此额外信息时,您已经在指定将捕获的图像存储在何处。因为您已经知道位置,所以在ActivityResult()中传递的意图将为null。i、 e.数据将为空
这就是为什么当您试图通过
Uri uri = data.getData();
这将导致NullPointerException。因此,您只需要使用onActivityResult中的原始路径,而不是从getData请求它。也有同样的问题。您在这里的解决方案对我不起作用:即使我在activityresult(req,res,data)上注释对
数据的所有引用,该错误仍然会发生。