我试图让用户在从画廊中选择/选择图像。现在，从画廊选择后裁剪工作但不是相机。以下是我的代码，我没有收到任何错误消息。我们遵循了http://mobile.tutsplus.com/tutorials/android/capture-and-crop-an-image-with-the-device-camera/
//Camera button clicked
public void camera_click(View view) {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra("return-data", true);
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
}
//Result of camera capture
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
//camera
if (requestCode == CAMERA_PIC_REQUEST) {
mImageCaptureUri = data.getData();
performCrop();
}
if (requestCode == PIC_CROP) {
//get the returned data
try{
Bundle extras = data.getExtras();
//get the cropped bitmap
thumbnail = extras.getParcelable("data");
//retrieve a reference to the ImageView
ImageView image = (ImageView) findViewById(R.id.test_image);
//display the returned cropped image
image.setImageBitmap(thumbnail);
TextView imgTv = (TextView) findViewById(R.id.imageInfo);
String desc = imgTv.getText().toString();
if (desc.equalsIgnoreCase("")) {
String errorMessage = "Please enter a description before submitting a photo.";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
} else {
}
}
catch(Exception ex)
{
Log.i("err", ex.getMessage());
}
}
//gallery selected
if (requestCode == SELECT_PHOTO) {
if (data != null) {
Cursor cursor = getContentResolver().query(data.getData(), null, null, null, null);
cursor.moveToFirst(); //if not doing this, 01-22 19:17:04.564: ERROR/AndroidRuntime(26264): Caused by: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 1
int idx = cursor.getColumnIndex(ImageColumns.DATA);
String fileSrc = cursor.getString(idx);
thumbnail = BitmapFactory.decodeFile(fileSrc); //load preview image
thumbnail = android.graphics.Bitmap.createScaledBitmap(thumbnail, 100, 100, true);
// ImageView image = (ImageView) findViewById(R.id.test_image);
// image.setImageBitmap(thumbnail);
ImageButton cam = (ImageButton) findViewById(R.id.camera);
// cam.setVisibility(View.INVISIBLE);
ImageButton gal = (ImageButton) findViewById(R.id.gallery);
mImageCaptureUri = data.getData();
// gal.setVisibility(View.INVISIBLE);
performCrop();
} else {
//Log.d(LOG_TAG, "idButSelPic Photopicker canceled");
// m_Tv.setText("Image selection canceled!");
}
}
}
}//end onactivity results
//method to luanch crop image
private void performCrop() {
try {
//call the standard crop action intent (the user device may not support it)
Intent cropIntent = new Intent("com.android.camera.action.CROP");
cropIntent.setDataAndType(mImageCaptureUri, "image/*");
//set crop properties
cropIntent.putExtra("crop", "true");
//indicate aspect of desired crop
cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1);
//indicate output X and Y
cropIntent.putExtra("outputX", 256);
cropIntent.putExtra("outputY", 256);
//retrieve data on return
cropIntent.putExtra("return-data", true);
//start the activity - we handle returning in onActivityResult
startActivityForResult(cropIntent, PIC_CROP);
} catch (ActivityNotFoundException anfe) {
//display an error message
Log.i("err", anfe.getLocalizedMessage());
String errorMessage = "Your device doesn't support the crop action!";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
Intent myIntent = new Intent();
startActivityForResult(myIntent, PIC_CROP);
}
}
答案 0 :(得分：1)
这一行可能会给你这个问题：
mImageCaptureUri = data.getData();
删除并检查出来。
如果没有，我可以给你一个有效的代码。
工作样本 还包括此库：https://github.com/lvillani/android-cropimage
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
switch (requestCode) {
case PICK_FROM_CAMERA:
doCrop();
break;
case PICK_FROM_FILE:
if(data != null){
mImageCaptureUri = data.getData();
doCrop();
}
break;
case CROP_FROM_CAMERA:
if(data != null){
Bundle extras = data.getExtras();
if (extras != null) {
Bitmap photo = extras.getParcelable("data");
imagebutton.setImageBitmap(photo);
imagebutton.setScaleType(ScaleType.FIT_XY);
}
File f = new File(mImageCaptureUri.getPath());
if (f.exists()) f.delete();
}
break;
}
}
private void doCrop() {
// TODO Auto-generated method stub
final ArrayList<CropOption> cropOptions = new ArrayList<CropOption>();
Intent intent = new Intent("com.android.camera.action.CROP");
// intent.setClassName("com.android.camera", "com.android.camera.CropImage");
intent.setType("image/*");
List<ResolveInfo> list = getActivity().getPackageManager().queryIntentActivities( intent, 0 );
int size = list.size();
if (size == 0) {
Toast.makeText(getActivity(), "Can not find image crop app", Toast.LENGTH_SHORT).show();
return;
} else {
intent.setData(mImageCaptureUri);
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 200);
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("scale", true);
intent.putExtra("return-data", true);
if (size == 1) {
Intent i = new Intent(intent);
ResolveInfo res = list.get(0);
i.setComponent( new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
startActivityForResult(i, CROP_FROM_CAMERA);
} else {
for (ResolveInfo res : list) {
final CropOption co = new CropOption();
co.title = getActivity().getPackageManager().getApplicationLabel(res.activityInfo.applicationInfo);
co.icon = getActivity().getPackageManager().getApplicationIcon(res.activityInfo.applicationInfo);
co.appIntent= new Intent(intent);
co.appIntent.setComponent( new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
cropOptions.add(co);
}
CropOptionAdapter adapter = new CropOptionAdapter(getActivity(), cropOptions);
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Choose Crop App");
builder.setAdapter( adapter, new DialogInterface.OnClickListener() {
public void onClick( DialogInterface dialog, int item ) {
startActivityForResult( cropOptions.get(item).appIntent, CROP_FROM_CAMERA);
}
});
builder.setOnCancelListener( new DialogInterface.OnCancelListener() {
@Override
public void onCancel( DialogInterface dialog ) {
if (mImageCaptureUri != null ) {
getActivity().getContentResolver().delete(mImageCaptureUri, null, null );
mImageCaptureUri = null;
}
}
} );
AlertDialog alert = builder.create();
alert.show();
}
}
}
CropOption类：
public class CropOption {
public CharSequence title;
public Drawable icon;
public Intent appIntent;
}
<强> CropOptionAdapter：
public class CropOptionAdapter extends ArrayAdapter<CropOption> {
private ArrayList<CropOption> mOptions;
private LayoutInflater mInflater;
public CropOptionAdapter(Context context, ArrayList<CropOption> options) {
super(context, R.layout.crop_selector, options);
mOptions = options;
mInflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup group) {
if (convertView == null)
convertView = mInflater.inflate(R.layout.crop_selector, null);
CropOption item = mOptions.get(position);
if (item != null) {
((ImageView) convertView.findViewById(R.id.iv_icon)).setImageDrawable(item.icon);
((TextView) convertView.findViewById(R.id.tv_name)).setText(item.title);
return convertView;
}
return null;
}
}