[英]App is crashing when we upload the image from gallery?
我是 android 新手，所以，如果您发现任何错误，请告诉我。现在说到我遇到的问题，我们单击图像视图，然后会弹出一个窗口，从您要上传图像的位置进行选择，因此当我们单击时然后在画廊。
mProfileImageView.setOnClickListener(new View.OnClickListener() {
@TargetApi(Build.VERSION_CODES.M)
@Override
public void onClick(View v) {
new AlertDialog.Builder(ProfileActivity.this)
.setTitle("Profile Picture")
.setMessage("change your profile picture with")
.setPositiveButton(R.string.capture_image, new
DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// continue with delete
captureImage();
}
})
*//*.setNegativeButton(R.string.choose_image, new
DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// do nothing
chooseImage();
}
})*//*
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
}
});
public void chooseImage() {
try {
Intent i = new Intent(Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
i.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, IMAGE_QUALITY_LOW);
i.putExtra(MediaStore.EXTRA_SCREEN_ORIENTATION, 0);
i.putExtra(MediaStore.EXTRA_SIZE_LIMIT, IMAGE_MAX_SIZE);
i.setType("image/*");
//i.setAction(Intent.ACTION_GET_CONTENT);
/*i.putExtra("crop", "true");
i.putExtra("aspectX", 0);
i.putExtra("aspectY", 0);
i.putExtra("outputX", 400);
i.putExtra("outputY", 400);
i.putExtra("return-data", true);*/
startActivityForResult(Intent.createChooser(i, "Complete action using"), GALLERY_IMAGE_ACTIVITY_REQUEST_CODE);
} catch (ActivityNotFoundException anfe) {
//display an error message
String errorMessage = "Oops - your device doesn't have gallery!";
Toast.makeText(getApplicationContext(), errorMessage,
Toast.LENGTH_LONG).show();
}
}
当我们滚动 10-20 张图库图片并准备上传时，它崩溃了，我不知道为什么？
试试这个：java代码：
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final int SELECT_PICTURE = 100;
private static final String TAG = "MainActivity";
CoordinatorLayout coordinatorLayout;
FloatingActionButton btnSelectImage;
AppCompatImageView imgView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Find the views...
coordinatorLayout = (CoordinatorLayout) findViewById(R.id.coordinatorLayout);
btnSelectImage = (FloatingActionButton) findViewById(R.id.btnSelectImage);
imgView = (AppCompatImageView) findViewById(R.id.imgView);
btnSelectImage.setOnClickListener(this);
}
/* Choose an image from Gallery */
void openImageChooser() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_PICTURE);
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
// Get the url from data
Uri selectedImageUri = data.getData();
if (null != selectedImageUri) {
// Get the path from the Uri
String path = getPathFromURI(selectedImageUri);
Log.i(TAG, "Image Path : " + path);
// Set the image in ImageView
imgView.setImageURI(selectedImageUri);
}
}
}
}
/* Get the real path from the URI */
public String getPathFromURI(Uri contentUri) {
String res = null;
String[] proj = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(contentUri, proj, null, null, null);
if (cursor.moveToFirst()) {
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
res = cursor.getString(column_index);
}
cursor.close();
return res;
}
@Override
public void onClick(View v) {
openImageChooser();
}
}
添加权限
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
布局：
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.AppCompatImageView
android:id="@+id/imgView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="@dimen/activity_horizontal_margin" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/btnSelectImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
android:src="@android:drawable/ic_menu_gallery" />
</android.support.design.widget.CoordinatorLayout>
试试这个java代码它的工作原理。 我最近在我的 android 应用程序中使用了它
弹出
PopupWindow popup;
private void initiatePopupWindow() {
// TODO Auto-generated method stub
try {
LayoutInflater inflater = (LayoutInflater) getBaseContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.change_profileimg, null);
popup = new PopupWindow(layout, android.view.ViewGroup.LayoutParams.MATCH_PARENT,
android.view.ViewGroup.LayoutParams.MATCH_PARENT);
Button imagefromgallery = (Button) layout
.findViewById(R.id.imagefromgallery);
RelativeLayout relPopup = (RelativeLayout) layout.findViewById(R.id.relativeLayoutMainPopup);
Button captureimage = (Button) layout
.findViewById(R.id.captureimage);
imagefromgallery.setTypeface(Typeface.createFromAsset(getAssets(),
"fonts/OpenSans-Regular.ttf"));
captureimage.setTypeface(Typeface.createFromAsset(getAssets(),
"fonts/OpenSans-Regular.ttf"));
imagefromgallery.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
galleryPick();
popup.dismiss();
}
});
captureimage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// takePhoto();
callCameraApp();
popup.dismiss();
}
});
relPopup.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
popup.dismiss();
}
});
popup.setOutsideTouchable(true);
popup.setTouchInterceptor(new OnTouchListener() {
@Override
public boolean onTouch(View arg0, MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {
popup.dismiss();
return true;
}
return false;
}
});
popup.showAtLocation(layout, Gravity.BOTTOM, 0, 0);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
画廊精选
private void galleryPick() {
try {
Intent gintent = new Intent();
gintent.setType("image/*");
gintent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(
Intent.createChooser(gintent, "Select Picture"), PICK_IMAGE);
} catch (Exception e) {
Toast.makeText(getApplicationContext(), e.getMessage(),
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
}
}
调用相机应用
private void callCameraApp() {
Intent i = new Intent();
i.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
String fileName = "new-photo-name.jpg";
ContentValues values = new ContentValues();
values.put(MediaColumns.TITLE, fileName);
values.put(ImageColumns.DESCRIPTION, "Image captured by camera");
// imageUri is the current activity attribute, define and save it for
// later usage (also in onSaveInstanceState)
imageUri = getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
try {
fileName = getPath(imageUri);
} catch (Exception e) {
// TODO: handle exception
}
i.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(i, PICK_Camera_IMAGE1);
}
然后获取位图
public Uri getOutputMediaFileUri(int type) {
return Uri.fromFile(getOutputMediaFile(type));
}
private static File getOutputMediaFile(int type) {
// External sdcard location
File mediaStorageDir = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
"XYZ_");
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("errorrr", "Oops! Failed create "
+ "XYZ_" + " directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".png");
return mediaFile;
}
String filePath;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Uri selectedImageUri = null;
Uri selectedImagepicUri = null;
filePath = null;
switch (requestCode) {
case PICK_Camera_IMAGE:
if (resultCode == RESULT_OK) {
// use imageUri here to access the image
selectedImageUri = imageUri;
/*
* Bitmap mPic = (Bitmap) data.getExtras().get("data");
* selectedImageUri =
* Uri.parse(MediaStore.Images.Media.insertImage
* (getContentResolver(), mPic,
* getResources().getString(R.string.app_name),
* Long.toString(System.currentTimeMillis())));
*/
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(this, "Picture was not taken",
Toast.LENGTH_SHORT).show();
}
break;
case PICK_Camera_IMAGE1:
if (resultCode == RESULT_OK) {
// use imageUri here to access the image
selectedImagepicUri = imageUri;
/*
* Bitmap mPic = (Bitmap) data.getExtras().get("data");
* selectedImageUri =
* Uri.parse(MediaStore.Images.Media.insertImage
* (getContentResolver(), mPic,
* getResources().getString(R.string.app_name),
* Long.toString(System.currentTimeMillis())));
*/
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(this, "Picture was not taken",
Toast.LENGTH_SHORT).show();
}
break;
case PICK_IMAGE:
if (resultCode == Activity.RESULT_OK) {
selectedImagepicUri = data.getData();
}
}
if (selectedImagepicUri != null) {
try {
// OI FILE Manager
String filemanagerstring = selectedImagepicUri.getPath();
// MEDIA GALLERY
String selectedImagePath = getPath(selectedImagepicUri);
if (selectedImagePath != null) {
filePath = selectedImagePath;
} else if (filemanagerstring != null) {
filePath = filemanagerstring;
} else {
Toast.makeText(getApplicationContext(), "Unknown path",
Toast.LENGTH_LONG).show();
Log.e("Bitmap", "Unknown path");
}
if (filePath != null) {
decodeFile1(filePath);
} else {
bitmap = null;
}
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "Internal error",
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
}
}
if (selectedImageUri != null) {
try {
// OI FILE Manager
String filemanagerstring = selectedImageUri.getPath();
// MEDIA GALLERY
String selectedImagePath = getPath(selectedImageUri);
if (selectedImagePath != null) {
filePath = selectedImagePath;
} else if (filemanagerstring != null) {
filePath = filemanagerstring;
} else {
Toast.makeText(getApplicationContext(), "Unknown path",
Toast.LENGTH_LONG).show();
Log.e("Bitmap", "Unknown path");
}
if (filePath != null) {
decodeFile(filePath);
} else {
bitmap = null;
}
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "Internal error",
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
}
}
}
public String getPath(Uri uri) {
String[] projection = { MediaColumns.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
if (cursor != null) {
// HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL
// THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA
int column_index = cursor.getColumnIndexOrThrow(MediaColumns.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} else
return null;
}
public void decodeFile(String filePath) {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 512;
// Find the correct scale value. It should be the power of 2.
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE)
break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
bitmap = BitmapFactory.decodeFile(filePath, o2);
/**Bitmap.createScaledBitmap(bitmap, 200, 200, false);*/
if (bitmap == null) {
Toast.makeText(getApplicationContext(), "Please select image",
Toast.LENGTH_SHORT).show();
} else {
ivr.setImageBitmap(bitmap);
ivrIn.setImageBitmap(bitmap);
// new ImageGalleryTask().execute();
}
}
public void decodeFile1(String filePath) {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 512;
// Find the correct scale value. It should be the power of 2.
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE)
break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
bitmap = BitmapFactory.decodeFile(filePath, o2);
/**Bitmap.createScaledBitmap(bitmap, 200, 200, false);*/
if (bitmap == null) {
Toast.makeText(getApplicationContext(), "Please select image",
Toast.LENGTH_SHORT).show();
} else {
ivr.setImageBitmap(bitmap);
ivrIn.setImageBitmap(bitmap);
// new ImageGalleryTask().execute();
}
}
上传图片的异步任务
private class UploadFileToServer extends AsyncTask<Void, Integer, String> {
@Override
protected void onPreExecute() {
// setting progress bar to zero
progressDialog = new ProgressDialog(Profile.this);
//progressDialog.setTitle("Fetching data");
progressDialog.setMessage("Uploading profile pic, Please Wait....");
progressDialog.show();
progressDialog.setCancelable(false);
super.onPreExecute();
}
@Override
protected void onProgressUpdate(Integer... progress) {
// Making progress bar visible
System.out.println("progress update "+progress[0]);
// progressBar.setVisibility(View.VISIBLE);
// updating progress bar value
// progressBar.setProgress(progress[0]);
// updating percentage value
// txtPercentage.setText(String.valueOf(progress[0]) + "%");
}
@Override
protected String doInBackground(Void... params) {
return uploadFile();
}
@SuppressWarnings("deprecation")
private String uploadFile() {
String responseString = null;
int count;
try
{
FileInputStream fileInputStream = new FileInputStream(new File(filePath));
URL url = new URL("url");
System.out.println("url "+url);
connection = (HttpURLConnection) url.openConnection();
// Allow Inputs & Outputs.
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
// Set HTTP method to POST.
connection.setRequestMethod("POST");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
outputStream = new DataOutputStream( connection.getOutputStream() );
outputStream.writeBytes(twoHyphens + boundary + lineEnd);
outputStream.writeBytes("Content-Disposition: form-data; name=\"image\";filename=\"" + filePath + "\"" + lineEnd);
Log.e("chhuuuh", filePath + System.currentTimeMillis());
outputStream.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0)
{
outputStream.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
outputStream.writeBytes(lineEnd);
outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
responseString = connection.getResponseMessage();
fileInputStream.close();
outputStream.flush();
outputStream.close();
InputStream is = null;
try {
is = connection.getInputStream();
int ch;
StringBuffer sb = new StringBuffer();
while ((ch = is.read()) != -1) {
sb.append((char) ch);
}
return sb.toString();
} catch (IOException e) {
throw e;
} finally {
if (is != null) {
is.close();
}
}
}
catch (Exception ex)
{
}
return responseString;
}
@Override
protected void onPostExecute(String result) {
String result1 = result;
Log.e("respons form server", "response from server: " + result);
if(progressDialog.isShowing())
{
progressDialog.dismiss();
}
try {
JSONObject json = new JSONObject(result);
int response = json.getInt("status_code");
if(response == 1)
{
if (result1.contains("null")) {
Toast.makeText(getApplicationContext(), "You didn't change the image, please choose an image from gallery or click from the camera.", 2000).show();
} else {
JSONObject arr = json.getJSONObject("details");
String erer = arr.getString("error");
String message = arr.getString("message");
Toast.makeText(getApplicationContext(), message, 1000).show();
}
}
else
{
showAlert("Error Uploading Image, Please try again!!!");
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
super.onPostExecute(result);
}
}
得到正确的路径
public static String getPath(final Context context, final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
// TODO handle non-primary volumes
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[] {
split[1]
};
return getDataColumn(context, contentUri, selection, selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @param selection (Optional) Filter used in the query.
* @param selectionArgs (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public static String getDataColumn(Context context, Uri uri, String selection,
String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {
column
};
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
6.0及以上版本权限
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
Log.d("", "Permission callback called-------");
switch (requestCode) {
case REQUEST_ID_MULTIPLE_PERMISSIONS: {
Map<String, Integer> perms = new HashMap<String, Integer>();
// Initialize the map with both permissions
perms.put(Manifest.permission.CAMERA, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.WRITE_EXTERNAL_STORAGE, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.ACCESS_FINE_LOCATION, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.CALL_PHONE, PackageManager.PERMISSION_GRANTED);
// Fill with actual results from user
if (grantResults.length > 0) {
for (int i = 0; i < permissions.length; i++)
perms.put(permissions[i], grantResults[i]);
// Check for both permissions
if (perms.get(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED
&& perms.get(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
&& perms.get(Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
&& perms.get(Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
Log.d("", " permission granted");
// process the normal flow
//else any one or both the permissions are not granted
} else {
Log.d("", "Some permissions are not granted ask again ");
//permission is denied (this is the first time, when "never ask again" is not checked) so ask again explaining the usage of permission
// shouldShowRequestPermissionRationale will return true
//show the dialog or snackbar saying its necessary and try again otherwise proceed with setup.
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)
|| ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
|| ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)
|| ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CALL_PHONE)) {
showDialogOK("This app have camera functionality so Camera and Write External Storage Permission required for this app",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case DialogInterface.BUTTON_POSITIVE:
checkAndRequestPermissions();
break;
case DialogInterface.BUTTON_NEGATIVE:
// proceed with logic by disabling the related features or quit the app.
Toast.makeText(getApplicationContext(), "Please go to settings and enable permissions.", 2000).show();
break;
}
}
});
}
//permission is denied (and never ask again is checked)
//shouldShowRequestPermissionRationale will return false
else {
Toast.makeText(this, "Go to settings and enable permissions", Toast.LENGTH_LONG)
.show();
// //proceed with logic by disabling the related features or quit the app.
}
}
}
}
}
}
private void showDialogOK(String message, DialogInterface.OnClickListener okListener) {
new AlertDialog.Builder(this)
.setMessage(message)
.setPositiveButton("OK", okListener)
.setNegativeButton("Cancel", okListener)
.create()
.show();
}
private boolean checkAndRequestPermissions() {
int permissionCamera = ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
int locationPermission = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION);
int permissionWriteExternal = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
int permissionCallPhone = ContextCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE);
List<String> listPermissionsNeeded = new ArrayList<String>();
if (permissionCamera != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.CAMERA);
}
if (locationPermission != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.ACCESS_FINE_LOCATION);
}
if (permissionWriteExternal != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
}
if (permissionCallPhone != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.CALL_PHONE);
}
if (!listPermissionsNeeded.isEmpty()) {
ActivityCompat.requestPermissions(this, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]),REQUEST_ID_MULTIPLE_PERMISSIONS);
return false;
}
return true;
}
我知道这段代码太长而无法阅读，但这正是您想要的
由于您正在谈论多个图像，因此您收到了OutOfMemoryException 。 以下是您的选择：
android:largeHeap="true"Bitmap.recycle()回收目前不可见的图像以释放新内存。
尝试从图库中获取图像时，应用崩溃。 请查看详细信息
[英]App crashing when trying to fetch image from gallery. Please see details
从图库中获取并上传时，ImageView 上的图像方向已更改
[英]Image orientation is changed on ImageView When fetching from Gallery and upload
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