下面是我的编辑配置文件活动，我为用户提供了一个从库中设置配置文件图片的选项。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预定义的位置和临时位置，裁剪后图像将设置为个人资料图片。然而，它总是得到缩略图或低质量的图像。图像的质量与我们如何通过uri将图像传递到intent中，然后用getData获取图像uri，然后用setImageUri设置图像的质量相同，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。即使为了避免OOM（内存不足）错误，我也尝试使用inSampleSize、位图工厂选项和所有。。。但最后，我得到的总是相同的缩略图类型的图像质量！
正如标题中所说，我想要的是为userImageView设置的原始裁剪图像，而不是缩略图或低分辨率图像！
还要考虑到我在android开发以及编程、编码等方面都是新手！
任何形式的帮助都将不胜感激！
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
它可以保持原始图像的质量。
编辑：
嗯，他们可能已经更新了图书馆。我正在使用SimpleCropView的旧库。这是我的实施。
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);
然后是活动结果：
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();
}
}
OnCreate:中的SimpleCropView初始化
CropImageView ProfilePic = (CropImageView) findViewById(R.id.cropImageView);
以及获取裁剪位图：
final Bitmap croppedImage = ProfilePic.getCroppedBitmap();
我需要做的只是如下所示的一点更改：
intent.putExtra("outputX", 640);
intent.putExtra("outputY", 640);
640而不是360，就完成了！我们仍然可以在xml属性中获得360dp的宽度和高度，但在这里调整它会影响图像质量。如前所述，用640取代360，给了我想要的图像质量，而且比我之前得到的要好得多。所以最好在这里保持一个平均值，大多数图像都可以。然而，如果如上所述在这里故意设置的值大于原始图像，则有可能在图像视图内的图像周围具有黑色像素空间。因此，我们必须将大多数图像的平均值也考虑到图像质量。