Android gallery intent：我如何获取和设置完整尺寸和高质量的原始裁剪图像而不是缩略图？
Android gallery intent: How can i get and set original cropped image with full size and good quality instead of thumbnail?
下面是我的编辑个人资料 activity，我在其中为用户提供了一个选项，让他们可以从图库中设置个人资料图片。当用户点击编辑个人资料图片时，它会打开图库，裁剪所选图像，裁剪后的图像将保存在 pre-defined 位置以及临时位置，裁剪后的图像将设置为个人资料图片。但是，它总是得到缩略图或低质量图像。图像的质量与我们如何通过 uri 将图像传递到意图中，然后使用 getData 获取该图像 uri，然后使用 setImageUri 设置图像一样，因为这样它会给出缩略图而不是原始图像.这就是为什么我首先尝试保存裁剪后的图像然后从那里获取它的原因。甚至为了避免 OOM（内存不足）错误，我尝试使用 inSampleSize、位图工厂选项和所有调整图像质量和压缩...但最后，我得到的总是相同的缩略图类型图像质量！
我想要的是如标题所述，为 userImageView 设置的原始裁剪图像，而不是缩略图或低分辨率图像！
还要考虑到我是 android 开发以及编程、编码和所有方面的新手！
如有任何帮助，我们将不胜感激！
public class EditUserProfile extends AppCompatActivity {
private CoordinatorLayout coordinatorLayout;
public static final String Uimage = "Uimagepath";
public static final String Name = "nameKey";
public static final String UContact = "UContact";
public static final String Uemail = "Uemail";
private TextInputLayout inputLayoutName, inputLayoutEmail, inputLayoutContact;
private EditText usernameTextView, userEmailTextView, userContactTextView;
private ImageView userImageView;
SharedPreferences sharedpreferences;
private int PICK_IMAGE_REQUEST = 1;
String stringUri;
Uri outputFileUri;
Uri uriString;
Uri picUri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_user_profile);
Toolbar userProfileToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(userProfileToolbar);
inputLayoutName = (TextInputLayout) findViewById(R.id.input_layout_username);
inputLayoutEmail = (TextInputLayout) findViewById(R.id.input_layout_useremail);
inputLayoutContact = (TextInputLayout) findViewById(R.id.input_layout_usercontact);
userImageView = (ImageView) findViewById(R.id.userImage);
usernameTextView = (EditText) findViewById(R.id.username);
userContactTextView = (EditText) findViewById(R.id.usercontact);
userEmailTextView = (EditText) findViewById(R.id.useremail);
Button btnSave = (Button) findViewById(R.id.action_save);
sharedpreferences = getSharedPreferences(Uimage, Context.MODE_PRIVATE);
sharedpreferences = getSharedPreferences(Name, Context.MODE_PRIVATE);
sharedpreferences = getSharedPreferences(UContact, Context.MODE_PRIVATE);
sharedpreferences = getSharedPreferences(Uemail, Context.MODE_PRIVATE);
if (sharedpreferences.contains(Uimage)) {
String imagepath = sharedpreferences.getString(Uimage, "");
uriString = Uri.parse(imagepath);
userImageView.setImageURI(uriString);
}
if (sharedpreferences.contains(Name)) {
usernameTextView.setText(sharedpreferences.getString(Name, ""));
}
if (sharedpreferences.contains(UContact)) {
userContactTextView.setText(sharedpreferences.getString(UContact, ""));
}
if (sharedpreferences.contains(Uemail)) {
userEmailTextView.setText(sharedpreferences.getString(Uemail, ""));
}
usernameTextView.addTextChangedListener(new MyTextWatcher(usernameTextView));
userEmailTextView.addTextChangedListener(new MyTextWatcher(userEmailTextView));
userContactTextView.addTextChangedListener(new MyTextWatcher(userContactTextView));
coordinatorLayout = (CoordinatorLayout) findViewById(R.id
.coordinatorLayout);
final ImageButton button = (ImageButton) findViewById(R.id.editImage);
assert button != null;
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
Intent intent = new Intent();
// start the activity - we handle returning in onActivityResult
intent.setAction(Intent.ACTION_GET_CONTENT);
// Show only images, no videos or anything else
intent.setDataAndType(picUri, "image/*");
// set crop properties
intent.putExtra("crop", "true");
// indicate aspect of desired crop
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// indicate output X and Y
intent.putExtra("outputX", 360);
intent.putExtra("outputY", 360);
// retrieve data on return
intent.putExtra("return-data", false);
File file = new File(Environment.getExternalStorageDirectory() + File.separator + "image.jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
// Always show the chooser (if there are multiple options available)
startActivityForResult(Intent.createChooser(intent, "Select Pic from"), PICK_IMAGE_REQUEST);
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST) {
//Get our saved file into a bitmap object:
File file = new File(Environment.getExternalStorageDirectory() + File.separator + "image.jpg");
Bitmap Croppedbitmap = decodeSampledBitmapFromFile(file.getAbsolutePath(), 1000, 700);
userImageView.setImageBitmap(Croppedbitmap);
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/MyApp");
if (!myDir.exists())
myDir.mkdirs();
Random generator = new Random();
int n = 100;
n = generator.nextInt(n);
String fname = "Image_" + n + 1 + ".png";
File file2 = new File(myDir, fname);
outputFileUri = Uri.fromFile(file2);
stringUri = outputFileUri.toString();
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putString(Uimage, stringUri);
editor.apply();
if (file2.exists())
file2.delete();
try {
FileOutputStream out = new FileOutputStream(file2);
assert Croppedbitmap != null;
Croppedbitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
public static Bitmap decodeSampledBitmapFromFile(String path, int reqWidth, int reqHeight)
{ // BEST QUALITY MATCH
//First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize, Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
options.inPreferredConfig = Bitmap.Config.RGB_565;
int inSampleSize = 1;
if (height > reqHeight)
{
inSampleSize = Math.round((float)height / (float)reqHeight);
}
int expectedWidth = width / inSampleSize;
if (expectedWidth > reqWidth)
{
//if(Math.round((float)width / (float)reqWidth) > inSampleSize) // If bigger SampSize..
inSampleSize = Math.round((float)width / (float)reqWidth);
}
options.inSampleSize = inSampleSize;
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(path, options);
}
/**
* Validating form
*/
private boolean submitForm() {
if (!validateName()) {
return false;
}
if (!validateContact()) {
return false;
}
if (!validateEmail()) {
return false;
}
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "Saved!", Snackbar.LENGTH_LONG);
snackbar.show();
return true;
}
private boolean validateName() {
if (usernameTextView.getText().toString().trim().isEmpty()) {
inputLayoutName.setError(getString(R.string.err_msg_name));
requestFocus(usernameTextView);
return false;
} else {
inputLayoutName.setError(null);
}
return true;
}
private boolean validateEmail() {
String email = userEmailTextView.getText().toString().trim();
if (email.isEmpty() || !isValidEmail(email)) {
inputLayoutEmail.setError(getString(R.string.err_msg_email));
requestFocus(userEmailTextView);
return false;
} else {
inputLayoutEmail.setError(null);
}
return true;
}
private boolean validateContact() {
if (userContactTextView.getText().toString().trim().isEmpty()) {
inputLayoutContact.setError(getString(R.string.err_msg_contact));
requestFocus(userContactTextView);
return false;
} else {
inputLayoutContact.setError(null);
}
return true;
}
private static boolean isValidEmail(String email) {
return !TextUtils.isEmpty(email) && android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches();
}
private void requestFocus(View view) {
if (view.requestFocus()) {
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
}
}
private class MyTextWatcher implements TextWatcher {
private View view;
private MyTextWatcher(View view) {
this.view = view;
}
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
public void afterTextChanged(Editable editable) {
switch (view.getId()) {
case R.id.username:
validateName();
break;
case R.id.useremail:
validateEmail();
break;
case R.id.usercontact:
validateContact();
break;
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.editprofile_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_save:
if (!submitForm()) {
return false;
}
SharedPreferences.Editor editor = sharedpreferences.edit();
TextView usernameTextView = (TextView) findViewById(R.id.username);
String usernameString = usernameTextView.getText().toString();
editor.putString(Name, usernameString);
editor.apply();
TextView ucontactTV = (TextView) findViewById(R.id.usercontact);
String uContactS = ucontactTV.getText().toString();
editor.putString(UContact, uContactS);
editor.apply();
TextView uEmailTV = (TextView) findViewById(R.id.useremail);
String uEmailS = uEmailTV.getText().toString();
editor.putString(Uemail, uEmailS);
editor.apply();
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "Saved!", Snackbar.LENGTH_LONG);
snackbar.show();
Intent userProfileIntent = new Intent(EditUserProfile.this, UserProfile.class);
userProfileIntent.putExtra(Name, usernameString);
userProfileIntent.putExtra(UContact, uContactS);
userProfileIntent.putExtra(Uemail, uEmailS);
if (sharedpreferences.contains(stringUri)) {
userProfileIntent.putExtra(Uimage, stringUri);
}
setResult(RESULT_OK, userProfileIntent);
finish();
}
return true;
}
}
看看这个库是否有帮助。 https://github.com/IsseiAoki/SimpleCropView
可以保持原图的质量
编辑：
嗯，他们可能更新了图书馆。我正在使用旧的 SimpleCropView 库。这是我的实现。
用于从设备中选择图片。:
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
然后 Activity 结果：
if (requestCode == PICK_IMAGE_REQUEST && data != null && data.getData() != null) {
try {
String selectedImagePath = null;
Uri selectedImageUri = data.getData();
if (selectedImageUri.toString().contains("%")) {
if (selectedImageUri.toString().startsWith("content://com.google.android.apps.photos.content")) {
Log.v("esty", "URI: " + selectedImageUri.toString());
selectedImagePath = getPath.getImageUrlWithAuthority(this, selectedImageUri);
} else {
Log.v("esty", "URI: " + selectedImageUri.toString());
String[] UriArray = selectedImageUri.toString().split("%3A");
String newURIString = "content://media/external/images/media/" + UriArray[1];
Uri newURI = Uri.parse(newURIString);
Log.v("esty", "URI: " + newURI);
selectedImagePath = getPath.getPath(newURI, this);
}
} else {
selectedImagePath = getPath.getPath(selectedImageUri, this);
}
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
bitmap1 = BitmapFactory.decodeFile(selectedImagePath, options);
// MessageBox.Show(this, selectedImagePath);
finalFile = new File(selectedImagePath);
ProfilePic.setImageBitmap(bitmap1);
filename=selectedImagePath.substring(selectedImagePath.lastIndexOf("/")+1);
} catch (Exception e) {
e.printStackTrace();
}
}
我的 SimpleCropView 在 OnCreate 中初始化：
CropImageView ProfilePic = (CropImageView) findViewById(R.id.cropImageView);
以及获取裁剪位图：
final Bitmap croppedImage = ProfilePic.getCroppedBitmap();
我需要做的只是一点点改变，如下所示：
intent.putExtra("outputX", 640);
intent.putExtra("outputY", 640);
640 而不是 360，大功告成！我们仍然可以在 xml 属性中获得 360 dp 的宽度和高度，但在此处调整它会影响图像质量。如前所述，用 640 替换 360，给了我想要的图像质量，并且比我之前得到的更好。所以最好在这里保留大多数图像可以拥有的平均值。但是，如果如上所述在此处设置的值大于原始图像，则可能会在图像视图内的图像周围出现黑色像素 space。所以，我们必须把大多数图像的平均值也考虑到图像质量。
下面是我的编辑个人资料 activity，我在其中为用户提供了一个选项，让他们可以从图库中设置个人资料图片。当用户点击编辑个人资料图片时，它会打开图库，裁剪所选图像，裁剪后的图像将保存在 pre-defined 位置以及临时位置，裁剪后的图像将设置为个人资料图片。但是，它总是得到缩略图或低质量图像。图像的质量与我们如何通过 uri 将图像传递到意图中，然后使用 getData 获取该图像 uri，然后使用 setImageUri 设置图像一样，因为这样它会给出缩略图而不是原始图像.这就是为什么我首先尝试保存裁剪后的图像然后从那里获取它的原因。甚至为了避免 OOM（内存不足）错误，我尝试使用 inSampleSize、位图工厂选项和所有调整图像质量和压缩...但最后，我得到的总是相同的缩略图类型图像质量！
我想要的是如标题所述，为 userImageView 设置的原始裁剪图像，而不是缩略图或低分辨率图像！
还要考虑到我是 android 开发以及编程、编码和所有方面的新手！
如有任何帮助，我们将不胜感激！
public class EditUserProfile extends AppCompatActivity {
private CoordinatorLayout coordinatorLayout;
public static final String Uimage = "Uimagepath";
public static final String Name = "nameKey";
public static final String UContact = "UContact";
public static final String Uemail = "Uemail";
private TextInputLayout inputLayoutName, inputLayoutEmail, inputLayoutContact;
private EditText usernameTextView, userEmailTextView, userContactTextView;
private ImageView userImageView;
SharedPreferences sharedpreferences;
private int PICK_IMAGE_REQUEST = 1;
String stringUri;
Uri outputFileUri;
Uri uriString;
Uri picUri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_user_profile);
Toolbar userProfileToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(userProfileToolbar);
inputLayoutName = (TextInputLayout) findViewById(R.id.input_layout_username);
inputLayoutEmail = (TextInputLayout) findViewById(R.id.input_layout_useremail);
inputLayoutContact = (TextInputLayout) findViewById(R.id.input_layout_usercontact);
userImageView = (ImageView) findViewById(R.id.userImage);
usernameTextView = (EditText) findViewById(R.id.username);
userContactTextView = (EditText) findViewById(R.id.usercontact);
userEmailTextView = (EditText) findViewById(R.id.useremail);
Button btnSave = (Button) findViewById(R.id.action_save);
sharedpreferences = getSharedPreferences(Uimage, Context.MODE_PRIVATE);
sharedpreferences = getSharedPreferences(Name, Context.MODE_PRIVATE);
sharedpreferences = getSharedPreferences(UContact, Context.MODE_PRIVATE);
sharedpreferences = getSharedPreferences(Uemail, Context.MODE_PRIVATE);
if (sharedpreferences.contains(Uimage)) {
String imagepath = sharedpreferences.getString(Uimage, "");
uriString = Uri.parse(imagepath);
userImageView.setImageURI(uriString);
}
if (sharedpreferences.contains(Name)) {
usernameTextView.setText(sharedpreferences.getString(Name, ""));
}
if (sharedpreferences.contains(UContact)) {
userContactTextView.setText(sharedpreferences.getString(UContact, ""));
}
if (sharedpreferences.contains(Uemail)) {
userEmailTextView.setText(sharedpreferences.getString(Uemail, ""));
}
usernameTextView.addTextChangedListener(new MyTextWatcher(usernameTextView));
userEmailTextView.addTextChangedListener(new MyTextWatcher(userEmailTextView));
userContactTextView.addTextChangedListener(new MyTextWatcher(userContactTextView));
coordinatorLayout = (CoordinatorLayout) findViewById(R.id
.coordinatorLayout);
final ImageButton button = (ImageButton) findViewById(R.id.editImage);
assert button != null;
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
Intent intent = new Intent();
// start the activity - we handle returning in onActivityResult
intent.setAction(Intent.ACTION_GET_CONTENT);
// Show only images, no videos or anything else
intent.setDataAndType(picUri, "image/*");
// set crop properties
intent.putExtra("crop", "true");
// indicate aspect of desired crop
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// indicate output X and Y
intent.putExtra("outputX", 360);
intent.putExtra("outputY", 360);
// retrieve data on return
intent.putExtra("return-data", false);
File file = new File(Environment.getExternalStorageDirectory() + File.separator + "image.jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
// Always show the chooser (if there are multiple options available)
startActivityForResult(Intent.createChooser(intent, "Select Pic from"), PICK_IMAGE_REQUEST);
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST) {
//Get our saved file into a bitmap object:
File file = new File(Environment.getExternalStorageDirectory() + File.separator + "image.jpg");
Bitmap Croppedbitmap = decodeSampledBitmapFromFile(file.getAbsolutePath(), 1000, 700);
userImageView.setImageBitmap(Croppedbitmap);
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/MyApp");
if (!myDir.exists())
myDir.mkdirs();
Random generator = new Random();
int n = 100;
n = generator.nextInt(n);
String fname = "Image_" + n + 1 + ".png";
File file2 = new File(myDir, fname);
outputFileUri = Uri.fromFile(file2);
stringUri = outputFileUri.toString();
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putString(Uimage, stringUri);
editor.apply();
if (file2.exists())
file2.delete();
try {
FileOutputStream out = new FileOutputStream(file2);
assert Croppedbitmap != null;
Croppedbitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
public static Bitmap decodeSampledBitmapFromFile(String path, int reqWidth, int reqHeight)
{ // BEST QUALITY MATCH
//First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize, Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
options.inPreferredConfig = Bitmap.Config.RGB_565;
int inSampleSize = 1;
if (height > reqHeight)
{
inSampleSize = Math.round((float)height / (float)reqHeight);
}
int expectedWidth = width / inSampleSize;
if (expectedWidth > reqWidth)
{
//if(Math.round((float)width / (float)reqWidth) > inSampleSize) // If bigger SampSize..
inSampleSize = Math.round((float)width / (float)reqWidth);
}
options.inSampleSize = inSampleSize;
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(path, options);
}
/**
* Validating form
*/
private boolean submitForm() {
if (!validateName()) {
return false;
}
if (!validateContact()) {
return false;
}
if (!validateEmail()) {
return false;
}
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "Saved!", Snackbar.LENGTH_LONG);
snackbar.show();
return true;
}
private boolean validateName() {
if (usernameTextView.getText().toString().trim().isEmpty()) {
inputLayoutName.setError(getString(R.string.err_msg_name));
requestFocus(usernameTextView);
return false;
} else {
inputLayoutName.setError(null);
}
return true;
}
private boolean validateEmail() {
String email = userEmailTextView.getText().toString().trim();
if (email.isEmpty() || !isValidEmail(email)) {
inputLayoutEmail.setError(getString(R.string.err_msg_email));
requestFocus(userEmailTextView);
return false;
} else {
inputLayoutEmail.setError(null);
}
return true;
}
private boolean validateContact() {
if (userContactTextView.getText().toString().trim().isEmpty()) {
inputLayoutContact.setError(getString(R.string.err_msg_contact));
requestFocus(userContactTextView);
return false;
} else {
inputLayoutContact.setError(null);
}
return true;
}
private static boolean isValidEmail(String email) {
return !TextUtils.isEmpty(email) && android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches();
}
private void requestFocus(View view) {
if (view.requestFocus()) {
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
}
}
private class MyTextWatcher implements TextWatcher {
private View view;
private MyTextWatcher(View view) {
this.view = view;
}
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
public void afterTextChanged(Editable editable) {
switch (view.getId()) {
case R.id.username:
validateName();
break;
case R.id.useremail:
validateEmail();
break;
case R.id.usercontact:
validateContact();
break;
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.editprofile_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_save:
if (!submitForm()) {
return false;
}
SharedPreferences.Editor editor = sharedpreferences.edit();
TextView usernameTextView = (TextView) findViewById(R.id.username);
String usernameString = usernameTextView.getText().toString();
editor.putString(Name, usernameString);
editor.apply();
TextView ucontactTV = (TextView) findViewById(R.id.usercontact);
String uContactS = ucontactTV.getText().toString();
editor.putString(UContact, uContactS);
editor.apply();
TextView uEmailTV = (TextView) findViewById(R.id.useremail);
String uEmailS = uEmailTV.getText().toString();
editor.putString(Uemail, uEmailS);
editor.apply();
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "Saved!", Snackbar.LENGTH_LONG);
snackbar.show();
Intent userProfileIntent = new Intent(EditUserProfile.this, UserProfile.class);
userProfileIntent.putExtra(Name, usernameString);
userProfileIntent.putExtra(UContact, uContactS);
userProfileIntent.putExtra(Uemail, uEmailS);
if (sharedpreferences.contains(stringUri)) {
userProfileIntent.putExtra(Uimage, stringUri);
}
setResult(RESULT_OK, userProfileIntent);
finish();
}
return true;
}
}
看看这个库是否有帮助。 https://github.com/IsseiAoki/SimpleCropView
可以保持原图的质量
编辑：
嗯，他们可能更新了图书馆。我正在使用旧的 SimpleCropView 库。这是我的实现。
用于从设备中选择图片。:
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
然后 Activity 结果：
if (requestCode == PICK_IMAGE_REQUEST && data != null && data.getData() != null) {
try {
String selectedImagePath = null;
Uri selectedImageUri = data.getData();
if (selectedImageUri.toString().contains("%")) {
if (selectedImageUri.toString().startsWith("content://com.google.android.apps.photos.content")) {
Log.v("esty", "URI: " + selectedImageUri.toString());
selectedImagePath = getPath.getImageUrlWithAuthority(this, selectedImageUri);
} else {
Log.v("esty", "URI: " + selectedImageUri.toString());
String[] UriArray = selectedImageUri.toString().split("%3A");
String newURIString = "content://media/external/images/media/" + UriArray[1];
Uri newURI = Uri.parse(newURIString);
Log.v("esty", "URI: " + newURI);
selectedImagePath = getPath.getPath(newURI, this);
}
} else {
selectedImagePath = getPath.getPath(selectedImageUri, this);
}
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
bitmap1 = BitmapFactory.decodeFile(selectedImagePath, options);
// MessageBox.Show(this, selectedImagePath);
finalFile = new File(selectedImagePath);
ProfilePic.setImageBitmap(bitmap1);
filename=selectedImagePath.substring(selectedImagePath.lastIndexOf("/")+1);
} catch (Exception e) {
e.printStackTrace();
}
}
我的 SimpleCropView 在 OnCreate 中初始化：
CropImageView ProfilePic = (CropImageView) findViewById(R.id.cropImageView);
以及获取裁剪位图：
final Bitmap croppedImage = ProfilePic.getCroppedBitmap();
我需要做的只是一点点改变，如下所示：
intent.putExtra("outputX", 640);
intent.putExtra("outputY", 640);
640 而不是 360，大功告成！我们仍然可以在 xml 属性中获得 360 dp 的宽度和高度，但在此处调整它会影响图像质量。如前所述，用 640 替换 360，给了我想要的图像质量，并且比我之前得到的更好。所以最好在这里保留大多数图像可以拥有的平均值。但是，如果如上所述在此处设置的值大于原始图像，则可能会在图像视图内的图像周围出现黑色像素 space。所以，我们必须把大多数图像的平均值也考虑到图像质量。