我需要用camera拍摄一张
图片，保存图片，以
ImageViewImageview以后需要将图片发送到
internet这就是我所做的：
public void captureImage(View v) {
Intent camera_intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(camera_intent, CAMERA_PIC_REQUEST);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
imgView = (ImageView) findViewById(R.id.formRegister_picture);
imgView.setScaleType(ImageView.ScaleType.CENTER_CROP);
super.onActivityResult(requestCode, resultCode, data);
switch(requestCode){
case CAMERA_PIC_REQUEST:
if(resultCode==RESULT_OK){
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
imgView.setImageBitmap(thumbnail);
}
}
}
您可以通过在代码中添加以下行来调用相机活动：
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
private static int RESULT_IMAGE_CLICK = 1;
cameraImageUri = getOutputMediaFileUri(1);
// set the image file name
intent.putExtra(MediaStore.EXTRA_OUTPUT, cameraImageUri);
startActivityForResult(intent, RESULT_IMAGE_CLICK);
现在创建文件
Urinull中获得
return 数据
所以这是获取图像的方法
URI /** Create a file Uri for saving an image or video */
private static Uri getOutputMediaFileUri(int type) {
return Uri.fromFile(getOutputMediaFile(type));
}
/** Create a File for saving an image or video */
private static File getOutputMediaFile(int type) {
// Check that the SDCard is mounted
File mediaStorageDir = new File(
Environment.getExternalStorageDirectory(), Environment.DIRECTORY_PICTURES);
// Create the storage directory(MyCameraVideo) if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.e("Item Attachment",
"Failed to create directory MyCameraVideo.");
return null;
}
}
java.util.Date date = new java.util.Date();
String timeStamp = getTimeStamp();
File mediaFile;
if (type == 1) {
// For unique video file name appending current timeStamp with file
// name
mediaFile = new File(mediaStorageDir.getPath() + File.separator +abc+ ".jpg");
} else {
return null;
}
return mediaFile;
}
用于检索单击的图像：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == RESULT_IMAGE_CLICK) {
// Here you have the ImagePath which you can set to you image view
Log.e("Image Name", cameraImageUri.getPath());
Bitmap myBitmap = BitmapFactory.decodeFile(cameraImageUri.getPath());
yourImageView.setImageBitmap(myBitmap);
// For further image Upload i suppose your method for image upload is UploadImage
File imageFile = new File(cameraImageUri.getPath());
uploadImage(imageFile);
}
}
}
由于没有适当的解决方案，我将把我整理的有效且正确的内容放在这里。
ImageButton takepic = (ImageButton) returnView.findViewById(R.id.takepic);
takepic.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) { Intent intent = new Intent();
addPhoto();
}
});
Android 清单：
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.example.android.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths"></meta-data>
</provider>
Android 清单再次位于顶部：
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
外部 res/xml/file_paths.xml 文件：
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-files-path name="my_images" />
</paths>
创建图像文件函数
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
storageDir = getActivity().getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
添加照片功能
private void addPhoto() {
// Camera.
final List<Intent> cameraIntents = new ArrayList<Intent>();
final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
final PackageManager packageManager = getActivity().getPackageManager();
final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
for(ResolveInfo res : listCam) {
final String packageName = res.activityInfo.packageName;
final Intent intent = new Intent(captureIntent);
intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
intent.setPackage(packageName);
intent.putExtra(MediaStore.MEDIA_IGNORE_FILENAME, ".nomedia");
cameraIntents.add(intent);
}
// Filesystem.
final Intent galleryIntent = new Intent();
galleryIntent.setType("image/*");
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
// Chooser of filesystem options.
final Intent chooserIntent = Intent.createChooser(galleryIntent, "profileimg");
// Add the camera options.
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[]{}));
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
}
// Continue only if the File was successfully created
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(getContext(),
"com.example.android.fileprovider",
photoFile);
chooserIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(chooserIntent, 100);}
}
活动回调
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 100) {
try {
Bundle extras = data.getExtras();
Uri uri = data.getData();
ImageButton takepic = (ImageButton) returnView.findViewById(R.id.takepic);
if (extras!=null){
Bitmap imageBitmap = (Bitmap) extras.get("data");
Log.d(TAG, "onActivityResult: "+mCurrentPhotoPath);
takepic.setImageBitmap(imageBitmap);
}
String wholeID = DocumentsContract.getDocumentId(uri);
// Split at colon, use second item in the array
String idx = wholeID.split(":")[1];
String[] column = {MediaStore.Images.Media.DATA};
// where id is equal to
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = getContext().getContentResolver().
query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[]{idx}, null);
String filePath = "";
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContext().getContentResolver(), uri);
takepic.setImageBitmap(bitmap);
Toast.makeText(getContext(), "Uploading In Progress",
Toast.LENGTH_LONG);
}catch(Exception e){
e.getMessage();
}
}}
试试这个，将图像保存到文件资源管理器：
public void captureImage(View v) {
Intent camera_intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(Environment.getExternalStorageDirectory(), "image.png");
camera_intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
startActivityForResult(camera_intent, CAMERA_PIC_REQUEST);
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode== Activity.RESULT_OK){
f = new File(Environment.getExternalStorageDirectory().toString());
for (File temp : f.listFiles()) {
if (temp.getName().equals("image.png")) {
f = temp;
imagePath= f.getAbsolutePath();
Bitmap thumbnail= BitmapFactory.decodeFile(f.getAbsolutePath(), options);
imgView.setImageBitmap(thumbnail);
}
每当需要显示图像时，您都可以从路径“imagePath”获取图像。