当我改变相机的方向进行裁剪图像时，为啥我会丢失数据？
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【中文标题】当我改变相机的方向进行裁剪图像时，为啥我会丢失数据？【英文标题】：Why did I lose data when I change the orientation of camera doing crop image?当我改变相机的方向进行裁剪图像时，为什么我会丢失数据？ 【发布时间】：2014-12-15 12:52:36 【问题描述】：我正在做一个应用程序，该应用程序从相机获取图像并在之后对其进行裁剪，但有些我如何丢失我的活动对象，当它回来时，我在它的 OnCreate 方法上得到 NullPointerExeception。但是当我从图库中选择图像时，它可以正常工作，因为它不会关闭活动。
public void onClick(DialogInterface dialog, int item)
if (items[item].equals("Camera"))
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
intent.putExtra("return-data", true);
startActivityForResult(intent, Constants.PICK_FROM_CAMERA);
else if (items[item].equals("Galeria"))
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("image/*");
// ******** code for crop image
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 100);
intent.putExtra("outputY", 100);
intent.putExtra("max-height", 800);
intent.putExtra("max-width", 800);
intent.putExtra("return-data", true);
intent.putExtra("scaleType", "centerCrop");
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
try
startActivityForResult(Intent.createChooser(intent,
"Complete action using"), Constants.PICK_FROM_GALLERY);
catch (ActivityNotFoundException e)
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
Bitmap tempImage;
OutputStream fOut = null;
File root = new File(Environment.getExternalStorageDirectory()
+ File.separator);
try
File sdImageMainDirectory = new File(root, "foto.jpg");
fOut = new FileOutputStream(sdImageMainDirectory);
catch (Exception e)
e.printStackTrace();
if (requestCode == Constants.PICK_FROM_CAMERA)
root = new File(Environment.getExternalStorageDirectory()
+ File.separator + "foto.jpg");
Bitmap photo = (Bitmap) data.getExtras().get("data");
saveBitmap(photo, Environment.getExternalStorageDirectory()
+ File.separator + "foto.jpg");
try
cropCapturedImage(Uri.fromFile(root));
catch(ActivityNotFoundException aNFE)
//display an error message if user device doesn't support
String errorMessage = "Desculpe, seu dispositivo não suporta Crop!";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
if (requestCode == Constants.PICK_FROM_GALLERY && data != null)
Bundle extras2 = data.getExtras();
if (extras2 != null)
Bitmap photo = extras2.getParcelable("data");
this.photo.setImageBitmap(photo);
this.photo.buildDrawingCache();
tempImage = this.photo.getDrawingCache();
try
tempImage.compress(Bitmap.CompressFormat.JPEG, 100, fOut);
fOut.flush();
fOut.close();
BasicUserPerson.getInstance().setPhotoPath(
Environment.getExternalStorageDirectory()
+ File.separator + "foto.jpg");
catch (Exception e)
e.printStackTrace();
//user is returning from cropping the image
else if(requestCode == Constants.PIC_CROP && data != null)
//get the returned data
Bundle extras = data.getExtras();
if (extras != null)
Bitmap thePic = (Bitmap) data.getExtras().get("data");
saveBitmap(thePic, Environment.getExternalStorageDirectory()
+ File.separator + "foto.jpg");
photo.setImageBitmap(thePic);
BasicUserPerson.getInstance().setPhotoPath(
Environment.getExternalStorageDirectory()
+ File.separator + "foto.jpg");
public void saveBitmap(Bitmap photo, String path)
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
File f = new File(path);
try
f.createNewFile();
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
fo.close();
catch (IOException e)
e.printStackTrace();
public void cropCapturedImage(Uri picUri)
Intent cropIntent = new Intent("com.android.camera.action.CROP");
cropIntent.setDataAndType(picUri, "image/*");
cropIntent.putExtra("crop", "true");
cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1);
cropIntent.putExtra("outputX", 256);
cropIntent.putExtra("outputY", 256);
cropIntent.putExtra("return-data", true);
cropIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(cropIntent, Constants.PIC_CROP);
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.dados_pessoais);
fullName = (EditText) findViewById(R.id.edtFullName);
cpf = (EditText) findViewById(R.id.edtCpf);
email = (EditText) findViewById(R.id.edtDadEmail);
ddd = (EditText) findViewById(R.id.edtDadDDD);
telefone = (EditText) findViewById(R.id.edtDadTele);
ddd2 = (EditText) findViewById(R.id.edtDadDDD2);
celular = (EditText) findViewById(R.id.edtDadTel);
btSalvar = (ImageView) findViewById(R.id.imgSalvar);
head = (ImageView) findViewById(R.id.imgDadosHead);
sexo = (Spinner) findViewById(R.id.spnSex);
birthday = (EditText) findViewById(R.id.edtBrithday);
civil = (Spinner) findViewById(R.id.spnCivil);
loadingCity = (ImageView) findViewById(R.id.imgLoadingCity);
escolaridade = (Spinner) findViewById(R.id.spnEscolaridade);
cep = (EditText) findViewById(R.id.edtCep);
state = (Spinner) findViewById(R.id.spnState);
city = (Spinner) findViewById(R.id.spnCity);
endereco = (EditText) findViewById(R.id.edtEndereco);
bairro = (EditText) findViewById(R.id.edtBairro);
num = (EditText) findViewById(R.id.edtNum);
comp = (EditText) findViewById(R.id.edtComp);
photo = (ImageView) findViewById(R.id.imgPhoto);
btSalvar.setOnClickListener(this);
photo.setOnClickListener(this);
//Line of error
if (!User.getInstance().getFullName().equals("null") && !User.getInstance().getFullName().equals(""))
fullName.setText(User.getInstance().getFullName());
if (!BasicUserPerson.getInstance().getPersonRegistration().equals("null") && !BasicUserPerson.getInstance().getPersonRegistration().equals(""))
cpf.setText(BasicUserPerson.getInstance().getPersonRegistration());
if (!User.getInstance().getEmail().equals("null") && !User.getInstance().getEmail().equals("null"))
email.setText(User.getInstance().getEmail());
email.setKeyListener(null);
if (!BasicUserPerson.getInstance().getMobilePhone().equals("null") && !BasicUserPerson.getInstance().getMobilePhone().equals(""))
String tel = BasicUserPerson.getInstance().getMobilePhone().replace("(", "").replace(")", "").replace(" ", "");
ddd.setText(tel.subSequence(0, 2));
celular.setText(tel.substring(2));
if (!BasicUserPerson.getInstance().getPhone().equals("null") && !BasicUserPerson.getInstance().getPhone().equals(""))
String tel = BasicUserPerson.getInstance().getPhone().replace("(", "").replace(")", "").replace(" ", "");
ddd2.setText(tel.subSequence(0, 2));
telefone.setText(tel.substring(2));
if (!BasicUserPerson.getInstance().getBirthday().equals("null") && !BasicUserPerson.getInstance().getBirthday().equals(""))
birthday.setText(BasicUserPerson.getInstance().getBirthday());
if (!BasicUser.getInstance().locationObj.getZipCode().equals("null") && !BasicUser.getInstance().locationObj.getZipCode().equals(""))
cep.setText(BasicUser.getInstance().locationObj.getZipCode());
if (!BasicUser.getInstance().locationObj.getAddress().equals("null") && !BasicUser.getInstance().locationObj.getAddress().equals(""))
endereco.setText(BasicUser.getInstance().locationObj.getAddress());
if (!BasicUser.getInstance().locationObj.getNeighborhood().equals("null") && !BasicUser.getInstance().locationObj.getNeighborhood().equals(""))
bairro.setText(BasicUser.getInstance().locationObj.getNeighborhood());
它输出：
12-15 21:22:55.002: E/AndroidRuntime(2263): FATAL EXCEPTION: main
12-15 21:22:55.002: E/AndroidRuntime(2263): Process: br.com.inradar, PID: 2263
12-15 21:22:55.002: E/AndroidRuntime(2263): java.lang.RuntimeException: Unable to start activity ComponentInfobr.com.inradar/br.com.inradar.activities.DadosPessoais: java.lang.NullPointerException
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2202)
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2252)
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.app.ActivityThread.access$800(ActivityThread.java:139)
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1200)
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.os.Handler.dispatchMessage(Handler.java:102)
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.os.Looper.loop(Looper.java:136)
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.app.ActivityThread.main(ActivityThread.java:5103)
12-15 21:22:55.002: E/AndroidRuntime(2263): at java.lang.reflect.Method.invokeNative(Native Method)
12-15 21:22:55.002: E/AndroidRuntime(2263): at java.lang.reflect.Method.invoke(Method.java:515)
12-15 21:22:55.002: E/AndroidRuntime(2263): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
12-15 21:22:55.002: E/AndroidRuntime(2263): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:606)
12-15 21:22:55.002: E/AndroidRuntime(2263): at dalvik.system.NativeStart.main(Native Method)
12-15 21:22:55.002: E/AndroidRuntime(2263): Caused by: java.lang.NullPointerException
12-15 21:22:55.002: E/AndroidRuntime(2263): at br.com.inradar.activities.DadosPessoais.onCreate(DadosPessoais.java:176)
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.app.Activity.performCreate(Activity.java:5275)
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-15 21:22:55.002: E/AndroidRuntime(2263): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2166)
12-15 21:22:55.002: E/AndroidRuntime(2263): ... 11 more
【问题讨论】：
如果你需要一些帮助，你应该分享一些代码 发生这种情况是因为我们的 onFinish() 正在调用。 如果NPE发生在onCreate方法中，请问你贴一下这个方法和一些日志吗？
我指出了错误发生的地方
【参考方案1】：
你是这样用的吗
protected void onActivityResult(int requestCode, int resultCode, Intent data)
if(requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE)
if(resultCode == RESULT_OK)
// stub here
【讨论】：
我试过了，但还是一样，错误是在那部分之后 你能准确指出异常是在哪一行抛出的吗？ 我发现了问题here以上是关于当我改变相机的方向进行裁剪图像时，为啥我会丢失数据？的主要内容，如果未能解决你的问题，请参考以下文章