Android 相机和图库
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【中文标题】Android 相机和图库【英文标题】：Android camera and gallery 【发布时间】：2014-07-31 10:15:10 【问题描述】：我正在尝试从图库和相机中加载图片，但是当我从图库中选择图片或从相机拍照时，我的应用程序刚刚退出，我不知道为什么。它也从不调用 onActivityResult() 方法。这是整个类，其中，在 doStartCamera() 和 pickFromGallery() 方法中，调用了 startActivityForResult() 方法（并且应该触发相机和图库结果）：
public class UserProfileCoverItem extends Fragment implements IDataFetch
private static UserProfileCoverItem myFrag;
private View v;
//private Context context;
private eKeshGlobal global;
private ProgressBar bar;
private Profile mProfile;
private TextView tvUsername, tvLevel;
private ImageView ivAvatar;
//private Bitmap mBitmap;
private String imagepath = null;
//private String mOriginalPhotoPath;
//private boolean pinCodeActive;
private File tempImageFile;
public static final int REQUEST_CODE_CAMERA = 21222;
public static final int REQUEST_CODE_GALLERY = 31333;
public static UserProfileCoverItem getInstance(Profile profile)
if (myFrag == null)
myFrag = new UserProfileCoverItem();
myFrag = new UserProfileCoverItem();
myFrag.mProfile = profile;
return myFrag;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle
savedInstanceState)
v = inflater.inflate(R.layout.frag_user_profile_cover, container, false);
//context = getActivity().getApplicationContext();
global = (eKeshGlobal) getActivity().getApplicationContext();
//pinCodeActive = global.getPinCodeActive();
ivAvatar = (ImageView) v.findViewById(R.id.ivUserProfileAvatar);
tvUsername = (TextView) v.findViewById(R.id.tvUserProfileUsername);
tvLevel = (TextView) v.findViewById(R.id.tvUserProfilePoints);
bar = (ProgressBar) v.findViewById(R.id.pbUserProfileCover);
bar.setProgress((Integer) mProfile.getPoints());
tvUsername.setText(mProfile.getFirstName() + " " + mProfile.getLastName());
tvLevel.setText(mProfile.getLevelName());
ivAvatar.setOnClickListener(new OnClickListener()
@Override
public void onClick(View v)
doCreateCameraDialog();
);
v.getViewTreeObserver().addOnGlobalLayoutListener(new
ViewTreeObserver.OnGlobalLayoutListener()
@SuppressWarnings("deprecation")
@Override
public void onGlobalLayout()
v.getViewTreeObserver().removeGlobalOnLayoutListener(this);
if (global.getAvatarBitmap() == null)
new GetUserPhoto(UserProfileCoverItem.this,
global).execute();
else
Utils.drawAvatar(global.getAvatarBitmap(), ivAvatar);
);
return v;
private void doCreateCameraDialog()
AlertDialog.Builder adb = new AlertDialog.Builder(getActivity());
CharSequence[] items = getResources().getString(R.string.label_photo_camera),
getResources().getString(R.string.label_photo_gallery);
adb.setItems(items, new DialogInterface.OnClickListener()
@Override
public void onClick(DialogInterface d, final int n)
d.dismiss();
switch (n)
case 0:
doStartCamera();
break;
case 1:
pickFromGallery();
break;
default:
break;
);
adb.setNegativeButton((getResources().getString(R.string.label_cancel)), null);
adb.setTitle(getResources().getString(R.string.label_photo_title));
adb.show();
private void doStartCamera()
tempImageFile = new File(Environment.getExternalStorageDirectory(),
"eKeshUserTemp.jpg");
try
tempImageFile.createNewFile();
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
//intent.putExtra("data", tempImageFile.getAbsolutePath());
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(tempImageFile));
startActivityForResult(intent, REQUEST_CODE_CAMERA);
catch (IOException e)
e.printStackTrace();
private void pickFromGallery()
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_PICK);
startActivityForResult(Intent.createChooser(intent,
getResources().getString(R.string.label_photo_gallery_select)),
REQUEST_CODE_GALLERY);
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_GALLERY && resultCode != 0)
onGalleryResult(data);
else if(requestCode == REQUEST_CODE_CAMERA && resultCode != 0)
onCameraResult(data);
public void onGalleryResult(Intent data)
try
Uri selectedImageUri = data.getData();
imagepath = getPath(selectedImageUri);
new AsyncTask<String, Void, Bitmap>()
private Bitmap result;
@Override
protected Bitmap doInBackground(String... params)
result = processImage(params[0]);
return result;
@Override
protected void onPostExecute(Bitmap bitmap)
super.onPostExecute(result);
if (result != null && !result.isRecycled())
Utils.drawAvatar(result, ivAvatar);
((Main) getActivity()).menuFrag.getResultOk(bitmap);
new UploadUserPhoto(global, result).execute();
@Override
protected void onPreExecute()
super.onPreExecute();
;
.execute(imagepath);
catch(Exception e)
Log.e("onGalleryResult", e.toString());
public void onCameraResult(Intent data)
new AsyncTask<String, Void, Bitmap>()
@Override
protected Bitmap doInBackground(String... params)
return processImage(params[0]);
@Override
protected void onPostExecute(Bitmap result)
super.onPostExecute(result);
if (result != null && !result.isRecycled())
Utils.drawAvatar(result, ivAvatar);
((Main) getActivity()).menuFrag.getResultOk(result);
new UploadUserPhoto(global, result).execute();
@Override
protected void onPreExecute()
super.onPreExecute();
;
.execute(tempImageFile.getAbsolutePath());
public String getPath(Uri uri)
String[] projection = MediaStore.Images.Media.DATA ;
//Cursor cursor = getActivity().managedQuery(uri, projection, null, null, null);
Cursor cursor = getActivity().getContentResolver().query(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String out = cursor.getString(column_index);
cursor.close();
return out;
private Bitmap processImage(String path)
try
Bitmap mBitmap;
File f = new File(path);
ExifInterface exif = new ExifInterface(f.getPath());
int orientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
int angle = 0;
if (orientation == ExifInterface.ORIENTATION_ROTATE_90)
angle = 90;
else if (orientation == ExifInterface.ORIENTATION_ROTATE_180)
angle = 180;
else if (orientation == ExifInterface.ORIENTATION_ROTATE_270)
angle = 270;
Matrix mat = new Matrix();
mat.postRotate(angle);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
options.inPurgeable = true;
options.inInputShareable = true;
mBitmap = BitmapFactory.decodeStream(new FileInputStream(f), null, options);
Log.i ("Slika", "w:" + mBitmap.getWidth() + " h:" + mBitmap.getHeight());
mBitmap = Bitmap.createBitmap(mBitmap, 0, 0,
mBitmap.getWidth(), mBitmap.getHeight(), mat, true);
// save temp small image
//mBitmap = Utils.createScaledBitmap(mBitmap, 480f,
640f);//Utils.doscaleBitmap(mBitmap,600);
//mBitmap = Utils.doscaleBitmap(mBitmap,500);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
mBitmap.compress(Bitmap.CompressFormat.JPEG, 80, bytes);
Log.i ("Slika", "w:" + mBitmap.getWidth() + " h:" + mBitmap.getHeight());
tempImageFile = new File(Environment.getExternalStorageDirectory(),
"eKeshUserTemp.jpg");
tempImageFile.createNewFile();
FileOutputStream fo = new FileOutputStream(tempImageFile);
fo.write(bytes.toByteArray());
fo.close();
return mBitmap;
catch (IOException e)
e.printStackTrace();
Log.w("TAG", "-- Error in setting image");
catch (OutOfMemoryError oom)
oom.printStackTrace();
Log.w("TAG", "-- OOM Error in setting image");
catch (NullPointerException esd)
esd.printStackTrace();
Log.w("TAG", "-- NullPointerException");
catch (RuntimeException ed)
ed.printStackTrace();
Log.w("TAG", "-- RuntimeException");
return null;
@Override
public void getResultOk(Object... params)
Bitmap photo = (Bitmap) params[0];
Utils.drawAvatar(photo, ivAvatar);
((Main) getActivity()).menuFrag.getResultOk(photo);
@Override
public void getResultError(Object... params)
// TODO Auto-generated method stub
@Override
public void getResultError()
// TODO Auto-generated method stub
这里是在 Main.java（主要活动）中实现的 onActivityResult()：
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == Activity.RESULT_OK)
if (mContent!= null)
Log.d("class", mContent.getClass().toString());
mContent.onActivityResult(requestCode, resultCode, data);
我知道已经存在一些相同的问题，但它们并没有帮助我解决这个特定问题。
【问题讨论】：
我了解到您发现了问题。请更新 Q，或者删除它。 【参考方案1】：我查看了您的代码，在我使用片段选择图像活动来处理通信并再次更新片段的意义上，它与我的相似。我的代码中唯一的区别是我检查 RESULT_OK 的方式。我使用了 getActivity().RESULT_OK 并且我很确定应该这样做。如果这对您不起作用，请告诉我。
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
Log.d("activity result ", "reached");
if (requestCode == 4)
Log.d("activity result ", "one");
if (resultCode == getActivity().RESULT_OK)
//set image view here
【讨论】：
实际上 RESULT_OK 是一个静态变量，所以你应该以静态方式访问它，所以它没有工作...错误是在主要活动类的 onCreate() 方法中，但无论如何谢谢.. .以上是关于Android 相机和图库的主要内容，如果未能解决你的问题，请参考以下文章