在清单上使用权限
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
和
CODE
mCameraButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (ActivityCompat.checkSelfPermission(getActivity(),
Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE}, 1000);
} else {
startCameraActivity();
}
}
});
public void startCameraActivity() {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (cameraIntent.resolveActivity(getActivity().getPackageManager()) != null) {
startActivityForResult(cameraIntent, 1000);
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK) {
if (requestCode == 1000) {
first_getUri = data.getData();
Bitmap bitmap = null;
try {
bitmap = getBitmapFromUri(first_getUri);
} catch (IOException e) {
}
File imageFile = null;
try {
imageFile = createFileFromBitmap(bitmap);
} catch (IOException e) {
}
returnUri = Uri.fromFile(imageFile);
}
Glide.with(this)
.load(returnUri)
.override(1280, 1280)
.into(mImageview);
}
}
这适用于其他方法（您可以忽略）
private Bitmap getBitmapFromUri(Uri uri) throws IOException {
ParcelFileDescriptor parcelFileDescriptor =
getActivity().getContentResolver().openFileDescriptor(uri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inJustDecodeBounds = true;
BitmapFactory.decodeFileDescriptor(fileDescriptor, null, opts);
int width = opts.outWidth;
int height = opts.outHeight;
float sampleRatio = getSampleRatio(width, height);
opts.inJustDecodeBounds = false;
opts.inSampleSize = (int) sampleRatio;
Bitmap resizedBitmap = BitmapFactory.decodeFileDescriptor(fileDescriptor, null, opts);
Log.d("Resizing", "Resized Width / Height : " + resizedBitmap.getWidth() + "/" + resizedBitmap.getHeight());
parcelFileDescriptor.close();
return resizedBitmap;
}
private float getSampleRatio(int width, int height) {
final int targetWidth = 1280;
final int targetheight = 1280;
float ratio;
if (width > height) {
// Landscape
if (width > targetWidth) {
ratio = (float) width / (float) targetWidth;
} else ratio = 1f;
} else {
// Portrait
if (height > targetheight) {
ratio = (float) height / (float) targetheight;
} else ratio = 1f;
}
return Math.round(ratio);
}
private File createFileFromBitmap(Bitmap bitmap) throws IOException {
File newFile = new File(getActivity().getFilesDir(), makeImageFileName());
FileOutputStream fileOutputStream = new FileOutputStream(newFile);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream);
fileOutputStream.close();
return newFile;
}
private String makeImageFileName() {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMdd_hhmmss");
Date date = new Date();
String strDate = simpleDateFormat.format(date);
return strDate + ".png";
}
当CODE用于从此类库中获取图片时 CODE 运行良好
private void startGallery() {
Intent cameraIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
cameraIntent.setType("image/*");
if (cameraIntent.resolveActivity(getActivity().getPackageManager()) != null) {
startActivityForResult(cameraIntent, 2000);
}
}
所以，我认为问题是在Android许可中。
CODE在android 5.xx
之下运行良好但是不能在超过或等于android 6.xx上运行
问题：我错过了CODE的许可吗？
Android权限太难理解您是否会告诉我如何修改此代码？
修改
不工作意味着：如果我点击mCameraButton，不要发生任何事情。什么也没发生。
答案 0 :(得分：2)
所以，我认为问题是在Android许可中。
CODE在android 5.xx
之下运行良好但是不能在超过或等于android 6.xx上运行
为此，您必须为Android 6.0及更高版本添加运行时权限。
实施例
final private int REQUEST_CODE_ASK_PERMISSIONS_CAMERA = 100;
final private int REQUEST_CODE_ASK_PERMISSIONS_EXTERNAL_STORAGE = 200;
// For Check Camera Permission
if (Build.VERSION.SDK_INT >= 23) {
int hasPermission = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.CAMERA);
if (hasPermission != PackageManager.PERMISSION_GRANTED) {
if (shouldShowRequestPermissionRationale(Manifest.permission.CAMERA)) {
// Display UI and wait for user interaction
getErrorDialog("You need to allow Camera permission." +
"\nIf you disable this permission, You will not able to add attachment.", getActivity(), true).show();
} else {
requestPermissions(new String[]{Manifest.permission.CAMERA}, REQUEST_CODE_ASK_PERMISSIONS_CAMERA);
}
return;
}
}
// For Check Read External Permission.
if (Build.VERSION.SDK_INT >= 23) {
int hasPermission = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE);
if (hasPermission != PackageManager.PERMISSION_GRANTED) {
if (shouldShowRequestPermissionRationale(Manifest.permission.READ_EXTERNAL_STORAGE)) {
// Display UI and wait for user interaction
getErrorDialog("You need to allow Read External Storage permission." +
"\nIf you disable this permission, You will not able to add attachment.", getActivity(), false).show();
} else {
requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_CODE_ASK_PERMISSIONS_EXTERNAL_STORAGE);
}
return;
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case REQUEST_CODE_ASK_PERMISSIONS_CAMERA:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// Permission Granted
Toast.makeText(getActivity(), "Permission Grant", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + ".jpg";
File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM), imageFileName);
uri = Uri.fromFile(imageStorageDir);
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
startActivityForResult(intent, 1);
} else {
// Permission Denied
Toast.makeText(getActivity(), "Required permission is disable.", Toast.LENGTH_SHORT).show();
}
break;
case REQUEST_CODE_ASK_PERMISSIONS_EXTERNAL_STORAGE:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// Permission Granted
Toast.makeText(getActivity(), "Permission Grant", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("image/*");
startActivityForResult(intent, 2);
} else {
// Permission Denied
Toast.makeText(getActivity(), "Required permission is disable.", Toast.LENGTH_SHORT).show();
}
break;
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
public AlertDialog.Builder getErrorDialog(String message, Context context, final boolean isFromCamera) {
final AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
alertDialog.setTitle(getString(R.string.app_name)).setMessage(message);
alertDialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
if (Build.VERSION.SDK_INT >= 23) {
if(isFromCamera){
requestPermissions(new String[]{Manifest.permission.CAMERA},
REQUEST_CODE_ASK_PERMISSIONS_CAMERA);
}else {
requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
REQUEST_CODE_ASK_PERMISSIONS_EXTERNAL_STORAGE);
}
}
}
});
return alertDialog;
}
答案 1 :(得分：1)
从Android Marshmellow开始Android生态系统要求开发人员在运行时获得某些权限，这意味着他们应该明确要求用户授予权限。您可以阅读更多here。
但我理解，请求这些权限需要编写大量的样板代码，这些代码很快就会变得令人生畏。所以我建议你使用第三方库。我最喜欢的是Let。 Let大大减少了使用运行时权限所需的样板。
答案 2 :(得分：1)
请求运行时权限很容易理解。 请在运行时查看Android官方请求权限。