裁剪图像 Android Kotlin
Posted
技术标签:
【中文标题】裁剪图像 Android Kotlin【英文标题】：Crop Image Android Kotlin 【发布时间】：2018-09-20 23:46:40 【问题描述】：我想制作一个图像选择器以允许我将图像返回到数据库，但它不起作用。 如果activityResult我是第一个，但是之后没有人可以帮助我吗？
imagePicker 的 Intent ：
imageAccount.setOnClickListener
val intent = Intent(Intent.ACTION_PICK,MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
startActivityForResult(intent, CropImage.PICK_IMAGE_CHOOSER_REQUEST_CODE)
我的 onActivityResult ：
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?)
super.onActivityResult(requestCode, resultCode, data)
if(requestCode == CropImage.PICK_IMAGE_CHOOSER_REQUEST_CODE && resultCode == android.app.Activity.RESULT_OK)
val imageUri = CropImage.getPickImageResultUri(context!!, data)
CropImage.activity(imageUri)
.setRequestedSize(1000, 1000)
.start(this@Account.activity!!)
Log.i("PICTURE","FIRST-IF")
else if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE)
Log.i("PICTURE","ELSE-IF")
val result = CropImage.getActivityResult(data)
if (resultCode == android.app.Activity.RESULT_OK)
Log.i("PICTURE","SECOND-IF")
picture = File(result.uri.path)
Log.i("PICTURE","OK")
val bitmap = BitmapFactory.decodeFile(result.uri.path)
imageAccount.setImageBitmap(bitmap)
else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE)
Log.i("PICTURE","SECOND-ELSE-IF")
//showError(result.error)
Log.i("PICTURE","XX")
感谢您的帮助！
【问题讨论】：
【参考方案1】：我用这段代码解决了我的问题：
imageAccount.setOnClickListener
if(CropImage.isExplicitCameraPermissionRequired(this@Account.activity!!))
ActivityCompat.requestPermissions(this@Account.activity!!, arrayOf(android.Manifest.permission.CAMERA), REQUEST_PERMISSION_CAMERA)
else
startActivityForResult(CropImage.getPickImageChooserIntent(this@Account.activity!!), CropImage.PICK_IMAGE_CHOOSER_REQUEST_CODE)
onActivityResult ：
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?)
super.onActivityResult(requestCode, resultCode, data)
if(requestCode == CropImage.PICK_IMAGE_CHOOSER_REQUEST_CODE && resultCode == android.app.Activity.RESULT_OK)
val imageUri = CropImage.getPickImageResultUri(context!!, data)
CropImage.activity(imageUri)
.setRequestedSize(1000, 1000)
.start(context!!,this)
else if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE)
val result = CropImage.getActivityResult(data)
if (resultCode == android.app.Activity.RESULT_OK)
picture = File(result.uri.path)
val bitmap = BitmapFactory.decodeFile(result.uri.path)
imageAccount.setImageBitmap(bitmap)
updateProfile()
else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE)
//showError(result.error)
【讨论】：
【参考方案2】：完整的图片选择和裁剪代码
第 1 步：- 添加此 gradle
implementation 'com.theartofdev.edmodo:android-image-cropper:1.2.1'
第 2 步：- 在您的包和清单中添加两个活动
<activity android:name=".ui.activities.CropImageActivity"
android:label="Crop Image"></activity>
<activity android:name=".ui.activities.ImagePickerActivity"
android:label="Pick Image"></activity>
CropImageActivity类
public class CropImageActivity extends AppCompatActivity implements CropImageView.OnSetImageUriCompleteListener, CropImageView.OnGetCroppedImageCompleteListener
private static final int DEFAULT_ASPECT_RATIO_VALUES = 100;
public static final String CROPPED_IMAGE_PATH = "cropped_image_path";
public static final String EXTRA_IMAGE_URI = "cropped_image_path";
public static final String FIXED_ASPECT_RATIO = "extra_fixed_aspect_ratio";
public static final String EXTRA_ASPECT_RATIO_X = "extra_aspect_ratio_x";
public static final String EXTRA_ASPECT_RATIO_Y = "extra_aspect_ratio_y";
private static final String ASPECT_RATIO_X = "ASPECT_RATIO_X";
private static final String ASPECT_RATIO_Y = "ASPECT_RATIO_Y";
private CropImageView mCropImageView;
private int mAspectRatioX = DEFAULT_ASPECT_RATIO_VALUES;
private int mAspectRatioY = DEFAULT_ASPECT_RATIO_VALUES;
private boolean isFixedAspectRatio = false;
Bitmap croppedImage;
//endregion
private TextView tv_cancel,tv_crop;
// Saves the state upon rotating the screen/restarting the activity
@Override
protected void onSaveInstanceState(@SuppressWarnings("NullableProblems") Bundle bundle)
super.onSaveInstanceState(bundle);
bundle.putInt(ASPECT_RATIO_X, mAspectRatioX);
bundle.putInt(ASPECT_RATIO_Y, mAspectRatioY);
// Restores the state upon rotating the screen/restarting the activity
@Override
protected void onRestoreInstanceState(@SuppressWarnings("NullableProblems") Bundle bundle)
super.onRestoreInstanceState(bundle);
mAspectRatioX = bundle.getInt(ASPECT_RATIO_X);
mAspectRatioY = bundle.getInt(ASPECT_RATIO_Y);
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_crop_image);
tv_cancel=(TextView)findViewById(R.id.tv_cancel);
tv_crop=(TextView)findViewById(R.id.tv_crop);
if (!getIntent().hasExtra(EXTRA_IMAGE_URI))
cropFailed();
return;
isFixedAspectRatio = getIntent().getBooleanExtra(FIXED_ASPECT_RATIO, false);
mAspectRatioX = getIntent().getIntExtra(EXTRA_ASPECT_RATIO_X, DEFAULT_ASPECT_RATIO_VALUES);
mAspectRatioY = getIntent().getIntExtra(EXTRA_ASPECT_RATIO_Y, DEFAULT_ASPECT_RATIO_VALUES);
Uri imageUri = Uri.parse(getIntent().getStringExtra(EXTRA_IMAGE_URI));
// Initialize components of the app
mCropImageView = (CropImageView) findViewById(R.id.CropImageView);
// If you want to fix the aspect ratio, set it to 'true'
mCropImageView.setFixedAspectRatio(isFixedAspectRatio);
if (savedInstanceState == null)
mCropImageView.setImageUriAsync(imageUri);
tv_cancel.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
cropFailed();
);
tv_crop.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
mCropImageView.getCroppedImageAsync(mCropImageView.getCropShape(), 0, 0);
);
private void cropFailed()
Toast.makeText(mCropImageView.getContext(), "Image crop failed", Toast.LENGTH_LONG).show();
setResult(RESULT_CANCELED);
finish();
@Override
protected void onStart()
super.onStart();
mCropImageView.setOnSetImageUriCompleteListener(this);
mCropImageView.setOnGetCroppedImageCompleteListener(this);
@Override
protected void onStop()
super.onStop();
mCropImageView.setOnSetImageUriCompleteListener(null);
mCropImageView.setOnGetCroppedImageCompleteListener(null);
@Override
public void onSetImageUriComplete(CropImageView view, Uri uri, Exception error)
if (error == null)
//Toast.makeText(mCropImageView.getContext(), "Image load successful", Toast.LENGTH_SHORT).show();
else
//Toast.makeText(mCropImageView.getContext(), "Image load failed: " + error.getMessage(), Toast.LENGTH_LONG).show();
Toast.makeText(mCropImageView.getContext(), "Unable to load image", Toast.LENGTH_LONG).show();
@Override
public void onGetCroppedImageComplete(CropImageView view, Bitmap bitmap, Exception error)
if (error == null)
croppedImage = bitmap;
try
String path = saveToInternalStorage(this, bitmap);
Intent resultIntent = new Intent();
resultIntent.putExtra(CROPPED_IMAGE_PATH, path);
setResult(Activity.RESULT_OK, resultIntent);
finish();
catch (IOException e)
e.printStackTrace();
cropFailed();
else
cropFailed();
private String saveToInternalStorage(Context context, Bitmap bitmapImage) throws IOException
ContextWrapper cw = new ContextWrapper(context);
// path to /data/data/yourapp/app_data/imageDir
File directory = cw.getDir("imageDir", Context.MODE_PRIVATE);
// Create imageDir
File mypath = new File(directory, "image.jpg");
FileOutputStream fos = null;
try
fos = new FileOutputStream(mypath);
// Use the compress method on the BitMap object to write image to the OutputStream
//Bitmap scaledBitmap = getCompressedBitmap(bitmapImage);
bitmapImage.compress(Bitmap.CompressFormat.PNG, 70, fos);
catch (Exception e)
e.printStackTrace();
finally
fos.close();
return directory.getAbsolutePath();
ImagePickerActivity类
public class ImagePickerActivity extends AppCompatActivity
private static final int REQUEST_PICK_IMAGE = 2365;
private static final int REQUEST_CROP_IMAGE = 2342;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
startActivityForResult(getPickImageChooserIntent(), REQUEST_PICK_IMAGE);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
if (resultCode == Activity.RESULT_OK)
if(requestCode == REQUEST_PICK_IMAGE)
Intent intent = new Intent(this, CropImageActivity.class);
Uri imageUri = getPickImageResultUri(data);
intent.putExtra(CropImageActivity.EXTRA_IMAGE_URI, imageUri.toString());
startActivityForResult(intent, REQUEST_CROP_IMAGE);
else if(requestCode == REQUEST_CROP_IMAGE)
System.out.println("Image crop success :"+data.getStringExtra(CropImageActivity.CROPPED_IMAGE_PATH));
String imagePath = new File(data.getStringExtra(CropImageActivity.CROPPED_IMAGE_PATH), "image.jpg").getAbsolutePath();
Intent result = new Intent();
result.putExtra("image_path", imagePath);
setResult(Activity.RESULT_OK, result);
finish();
else
System.out.println("Image crop failed");
setResult(Activity.RESULT_CANCELED);
finish();
/**
* Create a chooser intent to select the source to get image from.<br/>
* The source can be camera's (ACTION_IMAGE_CAPTURE) or gallery's (ACTION_GET_CONTENT).<br/>
* All possible sources are added to the intent chooser.
*/
public Intent getPickImageChooserIntent()
// Determine Uri of camera image to save.
Uri outputFileUri = getCaptureImageOutputUri();
List<Intent> allIntents = new ArrayList<>();
PackageManager packageManager = getPackageManager();
// collect all camera intents
Intent captureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
for (ResolveInfo res : listCam)
Intent intent = new Intent(captureIntent);
intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
intent.setPackage(res.activityInfo.packageName);
if (outputFileUri != null)
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
allIntents.add(intent);
// collect all gallery intents
Intent galleryIntent = new Intent(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
List<ResolveInfo> listGallery = packageManager.queryIntentActivities(galleryIntent, 0);
for (ResolveInfo res : listGallery)
Intent intent = new Intent(galleryIntent);
intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
intent.setPackage(res.activityInfo.packageName);
allIntents.add(intent);
// the main intent is the last in the list, so pickup the useless one
Intent mainIntent = allIntents.get(allIntents.size() - 1);
for (Intent intent : allIntents)
if (intent.getComponent().getClassName().equals("com.android.documentsui.DocumentsActivity"))
mainIntent = intent;
break;
allIntents.remove(mainIntent);
// Create a chooser from the main intent
Intent chooserIntent = Intent.createChooser(mainIntent, "Select source");
// Add all other intents
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, allIntents.toArray(new Parcelable[allIntents.size()]));
return chooserIntent;
/**
* Get URI to image received from capture by camera.
*/
private Uri getCaptureImageOutputUri()
Uri outputFileUri = null;
File getImage = getExternalCacheDir();
if (getImage != null)
outputFileUri = Uri.fromFile(new File(getImage.getPath(), "pickImageResult.jpeg"));
return outputFileUri;
/**
* Get the URI of the selected image from @link #getPickImageChooserIntent().<br/>
* Will return the correct URI for camera and gallery image.
*
* @param data the returned data of the activity result
*/
public Uri getPickImageResultUri(Intent data)
boolean isCamera = true;
if (data != null)
String action = data.getAction();
isCamera = action != null && action.equals(MediaStore.ACTION_IMAGE_CAPTURE);
return isCamera ? getCaptureImageOutputUri() : data.getData();
activity_crop_image.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_
android:layout_>
<RelativeLayout
android:id="@+id/header"
android:layout_
android:layout_
android:layout_alignParentTop="true"
android:background="@color/colorblue"
android:padding="15dp">
<TextView
android:id="@+id/tv_cancel"
android:layout_
android:layout_
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:text="Cancel"
android:textColor="@color/colorwhite"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv_crop"
android:layout_
android:layout_
android:layout_alignParentRight="true"
android:layout_below="@+id/tv_title"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:text="Crop"
android:textColor="@color/colorwhite"
android:textSize="18sp"
android:textStyle="bold" />
</RelativeLayout>
<com.theartofdev.edmodo.cropper.CropImageView
android:id="@+id/CropImageView"
android:layout_
android:layout_
android:layout_below="@+id/header"
android:layout_gravity="center"
app:cropFixAspectRatio="true" />
</RelativeLayout>
第 3 步：- 在片段或活动类中使用
private val REQUEST_PICK_IMAGE = 1002
profile_pic1.setOnClickListener
startActivityForResult(Intent(activity, ImagePickerActivity::class.java), REQUEST_PICK_IMAGE)
fun setImage(imagePath: String)
profile_pic1.setImageBitmap(getImageFromStorage(imagePath));
fun getImageFromStorage(path: String): Bitmap
var f = File(path);
var options = BitmapFactory.Options();
options.inJustDecodeBounds = false;
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, 512, 512);
return BitmapFactory.decodeStream(FileInputStream(f), null, options)
private fun calculateInSampleSize(
options: BitmapFactory.Options, reqWidth: Int, reqHeight: Int): Int
// Raw height and width of image
val height = options.outHeight
val width = options.outWidth
var inSampleSize = 1
if (height > reqHeight || width > reqWidth)
val halfHeight = height / 2
val halfWidth = width / 2
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while (halfHeight / inSampleSize > reqHeight && halfWidth / inSampleSize > reqWidth)
inSampleSize *= 2
return inSampleSize
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?)
super.onActivityResult(requestCode, resultCode, data)
if (resultCode == RESULT_OK && requestCode == requestCode)
var imagePath = data!!.getStringExtra("image_path");
setImage(imagePath);
else
System.out.println("Failed to load image");
注意：- 声明清单中的写入/读取和相机权限以及运行时权限
【讨论】：
以上是关于裁剪图像 Android Kotlin的主要内容，如果未能解决你的问题，请参考以下文章