我试图创建一个应用程序，我可以采取新的照片或使用现有的一个。我让两个函数单独工作，而不是一起工作。当Uri imageUri = data.getData();运行时应用程序崩溃。
代码如下:
public void btnPhotoClicked(View v) {
//Use to invoke a Camera
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//Create a variable with the filepath generated by the android operating system, Like a baws
File pictureDirectory = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
if (pictureDirectory.exists()) {
File test1 = new File(pictureDirectory, "100MEDIA/");
if (test1.exists()) {
pictureDirectory = test1;
} else {
File test2 = new File(pictureDirectory, "100ANDRO/");
if (test2.exists()) {
pictureDirectory = test2;
} else {
File test3 = new File(pictureDirectory, "Camera/");
if (!test3.exists()) {
test3.mkdirs();
}
pictureDirectory = test3;
}
}
} else {
pictureDirectory = new File(pictureDirectory, "Camera/");
pictureDirectory.mkdirs();
}
String pictureName = getPictureName();
File imageFile = new File(pictureDirectory, pictureName);
Uri pictureUri = Uri.fromFile(imageFile);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri);
//Start intent and anticipate result
startActivityForResult(cameraIntent, CAMERA_RESULT);
}
这是protected void onActivityResult(int requestCode, int resultCode, Intent data)
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
//if we are here everything processed successfully
if (requestCode==IMAGE_GALLERY_REQUEST) {
//If we are here we came from the Välj existerande build
Log.d("MainActivity", data.toString());
Toast.makeText(this, "IMAGE GALLERY_REQUEST", Toast.LENGTH_LONG).show();
//the address of the image on the device SD-card
Uri imageUri = data.getData();
//Declare a stream to read the image data from the SD-card
InputStream inputStream;
//Getting a Input stream based upon the image uri
try {
//if it execute flawlessly
inputStream = getContentResolver().openInputStream(imageUri);
Bitmap image = BitmapFactory.decodeStream(inputStream);
//show the image to the user
mImageView.setImageBitmap(image);
} catch (FileNotFoundException e) {
//show massage saying if the image is unavailable
Toast.makeText(this, "Could not open image", Toast.LENGTH_LONG).show();
}
} else if (requestCode == CAMERA_RESULT) {
//We are here because we have received a result from the camera
Toast.makeText(this, "CAMERA RESULT", Toast.LENGTH_LONG).show();
Log.d("MainActivity", data.toString());
//the address of the image on the device SD-card
Uri imageUri = data.getData();
//Declare a stream to read the image data from the SD-card
InputStream inputStream;
//Getting a Input stream based upon the image uri
try {
//if it execute flawlessly
inputStream = getContentResolver().openInputStream(imageUri);
Bitmap image = BitmapFactory.decodeStream(inputStream);
//show the image to the user
mImageView.setImageBitmap(image);
} catch (FileNotFoundException e) {
//show massage saying if the image is unavailable
Toast.makeText(this, "Could not open image", Toast.LENGTH_LONG).show();
}
}
}
试试这个代替image uri
if (resultCode == RESULT_OK)
{
if (requestCode == 1)
{
File f = new File(Environment.getExternalStorageDirectory().toString());
for (File temp : f.listFiles())
{
if (temp.getName().equals(tempFile))
{
f = temp;
//File photo = new File(Environment.getExternalStorageDirectory(), tempFile);
break;
}
}
try
{
Bitmap bitmap;
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
bitmap = BitmapFactory.decodeFile(f.getAbsolutePath(),bitmapOptions);
final int THUMBNAIL_SIZE = 100;
bitmap = Bitmap.createScaledBitmap(bitmap,THUMBNAIL_SIZE, THUMBNAIL_SIZE, false);
img.setImageBitmap(bitmap);
String path = android.os.Environment.getExternalStorageDirectory()+ File.separator;
File file = new File(path,tempFile);
updPath=file.toString();
imgSel = true;
success=true;
}
catch (Exception e)
{
Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
}
}
else if (requestCode == 2)
{
try
{
Uri selectedImage = data.getData();
String[] filePath = { MediaColumns.DATA };
Cursor c = getContentResolver().query(selectedImage,filePath, null, null, null);
c.moveToFirst();
int columnIndex = c.getColumnIndex(filePath[0]);
String picturePath = c.getString(columnIndex);
c.close();
File outputPath= new File(android.os.Environment.getExternalStorageDirectory(), tempFile);
updPath = outputPath.toString();
copyFile(picturePath, updPath);
Bitmap thumbnail = (BitmapFactory.decodeFile(updPath));
final int THUMBNAIL_SIZE = 100;
thumbnail = Bitmap.createScaledBitmap(thumbnail,THUMBNAIL_SIZE, THUMBNAIL_SIZE, false);
ByteArrayOutputStream bytearroutstream = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 100,bytearroutstream);
img.setImageBitmap(thumbnail);
imgSel = true;
success=true;
}
catch (Exception e)
{
Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
}
}
}
默认的Android相机应用程序只有在返回的intent中传递一个缩略图时才返回一个非空的intent。如果你通过一个URI来传递EXTRA_OUTPUT，它将返回一个null意图，图片在你传递的URI中。
你可以通过查看GitHub上的相机应用程序的源代码来验证这一点:
- https://github.com/android/platform_packages_apps_camera/blob/gingerbread-release/src/com/android/camera/Camera.java L1186
你的应用程序崩溃。因为getContentResolver().openInputStream(imageUri)调用空对象的方法。imageUri为空
:
public static final String
API level 3新增
Intent-extra的名称，用于指示用于存储请求的图像或视频的内容解析器Uri。常量:"output"
那么，你调用ACTION_IMAGE_CAPTURE intent，你应该像这样传递额外的信息:
Intent photo = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
Uri uri = Uri.parse("file:///sdcard/photo.jpg");
photo.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, uri);
startActivityForResult(takePicture,requestCode);
if (requestCode == CAMERA_REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
File file = new File(Environment.getExternalStorageDirectory().getPath(), "photo.jpg");
Uri uri = Uri.fromFile(file);
Bitmap bitmap;
try {
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
bitmap = crupAndScale(bitmap, 300); // if you mind scaling
pofileImageView.setImageBitmap(bitmap);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}