如果我想在没有从图库/相机意图中选择图像的情况下返回，我的应用程序会停止。如果我选择图像或拍摄照片，它可以正常工作。我搜索了很多东西，但没有任何作用。请帮忙......
这是onActivityResult方法
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
//super.onActivityResult(requestCode, resultCode, data);
switch(requestCode) {
case PICK_IMAGE_ID:
Bitmap bitmap = ImagePicker.getImageFromResult(getContext(), resultCode, data);
// TODO use bitmap
civ_profile_image.setImageBitmap(bitmap);
image_as_byte = imageToByte(bitmap);
break;
default:
bitmap = ImagePicker.getImageFromResult(getContext(), resultCode, data);
image_as_byte = imageToByte(bitmap);
break;
}
super.onActivityResult(requestCode, resultCode, data);
}
ImagePicker.java
public class ImagePicker {
private static final int DEFAULT_MIN_WIDTH_QUALITY = 400; // min pixels
private static final String TAG = "ImagePicker";
private static final String TEMP_IMAGE_NAME = "tempImage"; //temp image
public static int minWidthQuality = DEFAULT_MIN_WIDTH_QUALITY;
public static Intent getPickImageIntent(Context context) {
Intent chooserIntent = null;
List<Intent> intentList = new ArrayList<>();
Intent pickIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
takePhotoIntent.putExtra("return-data", true);
takePhotoIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile(context)));
intentList = addIntentsToList(context, intentList, pickIntent);
intentList = addIntentsToList(context, intentList, takePhotoIntent);
if (intentList.size() > 0) {
chooserIntent = Intent.createChooser(intentList.remove(intentList.size() - 1),
context.getString(R.string.pick_image_intent_text));
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentList.toArray(new Parcelable[]{}));
}
return chooserIntent;
}
private static List<Intent> addIntentsToList(Context context, List<Intent> list, Intent intent) {
List<ResolveInfo> resInfo = context.getPackageManager().queryIntentActivities(intent, 0);
for (ResolveInfo resolveInfo : resInfo) {
String packageName = resolveInfo.activityInfo.packageName;
Intent targetedIntent = new Intent(intent);
targetedIntent.setPackage(packageName);
list.add(targetedIntent);
//Log.d(TAG, "Intent: " + intent.getAction() + " package: " + packageName);
}
return list;
}
public static Bitmap getImageFromResult(Context context, int resultCode,
Intent imageReturnedIntent) {
//Log.d(TAG, "getImageFromResult, resultCode: " + resultCode);
Bitmap bm = null;
File imageFile = getTempFile(context);
if (resultCode == Activity.RESULT_OK) {
Uri selectedImage;
boolean isCamera = (imageReturnedIntent == null ||
imageReturnedIntent.getData() == null ||
imageReturnedIntent.getData().toString().contains(imageFile.toString()));
if (isCamera) { /** CAMERA **/
selectedImage = Uri.fromFile(imageFile);
} else { /** ALBUM **/
selectedImage = imageReturnedIntent.getData();
}
//Log.d(TAG, "selectedImage: " + selectedImage);
bm = getImageResized(context, selectedImage);
int rotation = getRotation(context, selectedImage, isCamera);
bm = rotate(bm, rotation);
}
return bm;
}
private static File getTempFile(Context context) {
File imageFile = new File(context.getExternalCacheDir(), TEMP_IMAGE_NAME);
imageFile.getParentFile().mkdirs();
return imageFile;
}
private static Bitmap decodeBitmap(Context context, Uri theUri, int sampleSize) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = sampleSize;
AssetFileDescriptor fileDescriptor = null;
try {
fileDescriptor = context.getContentResolver().openAssetFileDescriptor(theUri, "r");
} catch (FileNotFoundException e) {
e.printStackTrace();
}
Bitmap actuallyUsableBitmap = BitmapFactory.decodeFileDescriptor(
fileDescriptor.getFileDescriptor(), null, options);
// Log.d(TAG, options.inSampleSize + " sample method bitmap ... " +
// actuallyUsableBitmap.getWidth() + " " + actuallyUsableBitmap.getHeight());
return actuallyUsableBitmap;
}
/**
* Resize to avoid using too much memory loading big images (e.g.: 2560*1920)
**/
private static Bitmap getImageResized(Context context, Uri selectedImage) {
Bitmap bm;
int[] sampleSizes = new int[]{5, 3, 2, 1};
int i = 0;
do {
bm = decodeBitmap(context, selectedImage, sampleSizes[i]);
//Log.d(TAG, "resizer: new bitmap width = " + bm.getWidth());
i++;
} while (bm.getWidth() < minWidthQuality && i < sampleSizes.length);
return bm;
}
private static int getRotation(Context context, Uri imageUri, boolean isCamera) {
int rotation;
if (isCamera) {
rotation = getRotationFromCamera(context, imageUri);
} else {
rotation = getRotationFromGallery(context, imageUri);
}
//Log.d(TAG, "Image rotation: " + rotation);
return rotation;
}
private static int getRotationFromCamera(Context context, Uri imageFile) {
int rotate = 0;
try {
context.getContentResolver().notifyChange(imageFile, null);
ExifInterface exif = new ExifInterface(imageFile.getPath());
int orientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
}
} catch (Exception e) {
e.printStackTrace();
}
return rotate;
}
public static int getRotationFromGallery(Context context, Uri imageUri) {
int result = 0;
String[] columns = {MediaStore.Images.Media.ORIENTATION};
Cursor cursor = null;
try {
cursor = context.getContentResolver().query(imageUri, columns, null, null, null);
if (cursor != null && cursor.moveToFirst()) {
int orientationColumnIndex = cursor.getColumnIndex(columns[0]);
result = cursor.getInt(orientationColumnIndex);
}
} catch (Exception e) {
//Do nothing
} finally {
if (cursor != null) {
cursor.close();
}
}//End of try-catch block
return result;
}
private static Bitmap rotate(Bitmap bm, int rotation) {
if (rotation != 0) {
Matrix matrix = new Matrix();
matrix.postRotate(rotation);
Bitmap bmOut = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true);
return bmOut;
}
return bm;
}
}
图像到byteArray方法
private byte[] imageToByte(Bitmap image) {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.PNG, 0, outputStream);
return outputStream.toByteArray();
}
我在onActivityResult
中尝试了这样和其他人 if (resultCode != RESULT_OK) {
if (requestCode == PICK_IMAGE_ID) {
if (data.getExtras() == null) {
Bitmap bitmap = ImagePicker.getImageFromResult(getContext(), resultCode, data);
// TODO use bitmap
civ_profile_image.setImageBitmap(bitmap);
image_as_byte = imageToByte(bitmap);
} else {
Bitmap bitmap = (Bitmap) data.getExtras().get("data");
civ_profile_image.setImageBitmap(bitmap);
image_as_byte = imageToByte(bitmap);
Toast.makeText(getContext(), "No image is selected", Toast.LENGTH_SHORT).show();
}
}
}
这是Logcat。不幸的是，Logcat现在没有任何事情发生（没有消息）。有一个＆＃34; DEAD＆＃34;在logcat中我的项目名称旁边标记。我不知道发生了什么。在此之前我复制了这个logcat。
01-01 05:30:14.680 246-246/? I/auditd: type=1403 audit(0.0:2): policy loaded auid=4294967295 ses=4294967295
01-01 05：30：14.680 246-246 /？ W / auditd：type = 1404 audit（0.0：3）：enforcing = 1 old_enforcing = 0 auid = 4294967295 ses = 4294967295 01-01 05：30：15.200 1-1 /？ W / init：type = 1400 audit（0.0：4）：avc：denied {create} for name =＆＃34; preload＆＃34; scontext = u：r：init：s0 tcontext = u：object_r：system_file：s0 tclass = dir permissive = 0 01-01 05：30：15.210 1-1 /？ W / init：type = 1400 audit（0.0：5）：avc：denied {create} for name =＆＃34; preload＆＃34; scontext = u：r：init：s0 tcontext = u：object_r：system_file：s0 tclass = dir permissive = 0 01-01 05：30：15.720 1-1 /？ W / init：type = 1400 audit（0.0：6）：avc：denied {create} for name =＆＃34; root_channel＆＃34; scontext = u：r：init：s0 tcontext = u：object_r：root_execute_file：s0 tclass = dir permissive = 0
--------- beginning of system
01-01 05：30：15.876 247-247 /？ I / vold：Vold 3.0（觉醒）开火 01-01 05：30：15.876 247-256 /？ D / NVRAM：检查nvram恢复是否准备就绪！ 01-01 05：30：15.876 247-247 /？ V / vold：检测到支持：exfat ext4 vfat exfat 01-01 05：31：09.079 862-1834 /？ V / ActivityManager：广播：意图{act = android.intent.action.ACTION_SUBINFO_CONTENT_CHANGE flg = 0x10} ordered = false userid = 0 callerApp = ProcessRecord {6fce49f 1505：com.android.phone/1001} 01-01 05：31：09.080 862-1559 /？ V / ActivityManager：广播粘性：Intent {act = android.intent.action.ACTION_SUBINFO_RECORD_UPDATED flg = 0x10（有额外内容）} ordered = false userid = 0 callerApp = ProcessRecord {6fce49f 1505：com.android.phone / 1001}
答案 0 :(得分：0)
在您的lenArg-1方法中，您没有检查我认为没有选择图像的情况。你应该相应地安排你的开关盒，可能会调整下面的代码部分。
onActivityResult答案 1 :(得分：0)
请处理onActivityResult中的RESULT_OK和RESULT_CANCELED两种情况，无需使用默认情况。
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
//super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case PICK_IMAGE_ID:
Bitmap bitmap = ImagePicker.getImageFromResult(getContext(), resultCode, data);
// TODO use bitmap
civ_profile_image.setImageBitmap(bitmap);
image_as_byte = imageToByte(bitmap);
break;
}
} else {
Toast.makeText(this, "Result Canceled", Toast.LENGTH_LONG).show();
}
super.onActivityResult(requestCode, resultCode, data);
}
答案 2 :(得分：0)
使用
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch(requestCode) {
case PICK_IMAGE_ID:
if (resultCode != RESULT_OK) {
return;
}
Bitmap bitmap = ImagePicker.getImageFromResult(getContext(), resultCode, data);
...
break;
}
super.onActivityResult(requestCode, resultCode, data);
}