用相机拍照并将路径发送给其他人activity
Take picture with camera and send the path to other activity
我正在 Android 开发我的应用程序,但遇到了一个小问题。在我的 MainActivity 上,我拍了一张照片,然后将路径保存在一个字符串中,然后我将这个字符串发送到 CameraActivity。这是我的代码:
btnCamera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
});
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
Uri tempUri = getImageUri(getApplicationContext(), photo);
String ruta = getRealPathFromURI(tempUri);
Intent i = new Intent(getApplicationContext(), WarikeActivity.class);
i.putExtra("ruta",ruta);
startActivity(i);
}
}
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
public String getRealPathFromURI(Uri uri) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
return cursor.getString(idx);
}
然后,在 CameraActivity 上我收到图片的路径,我正在尝试将图片放在我的 ImageView 上
void events(){
Bundle extras = getIntent().getExtras();
ruta = extras.getString("ruta");
Bitmap imageBitmap = (Bitmap) extras.get(ruta);
imgWarike.setImageBitmap(imageBitmap);
}
但是位图为空。知道为什么会这样吗?提前致谢。
不是拍照然后获取路径,而是先选择您想要的路径,然后将图像保存在那里。看看下面的代码:
private File file;
private URI imageUri;
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
String name = String.valueOf(System.currentTimeMillis() + ".jpg");
file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
if (!file.exists()) {
file.mkdirs();
}
File photo = new File(file, name);
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photo));
imageUri = Uri.fromFile(photo);
startActivityForResult(intent, CAMERA_REQUEST);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
imageUri = data.getData();
Intent i = new Intent(getApplicationContext(), WarikeActivity.class);
i.putExtra("ruta", file);
startActivity(i);
}
}
您是否尝试遵循有关它的官方 Android 文档? http://developer.android.com/training/camera/photobasics.html
如果您试图从从 Intent 获得的路径中获取位图,请使用此代码。
Bitmap myBitmap = BitmapFactory.decodeFile(<yourFilepath>);
或者你在第一个activity中已经获取了位图,你直接通过intent发送位图如下。
你可以这样做:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
Intent i = new Intent(getApplicationContext(), WarikeActivity.class);
i.putExtra("foto", byteArray);
startActivity(i);
}
然后:
void events(){
byte[] byteArray = getIntent().getByteArrayExtra("foto");
Bitmap foto = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
imgFoto.setImageBitmap(foto);
}
我正在 Android 开发我的应用程序,但遇到了一个小问题。在我的 MainActivity 上,我拍了一张照片,然后将路径保存在一个字符串中,然后我将这个字符串发送到 CameraActivity。这是我的代码:
btnCamera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
});
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
Uri tempUri = getImageUri(getApplicationContext(), photo);
String ruta = getRealPathFromURI(tempUri);
Intent i = new Intent(getApplicationContext(), WarikeActivity.class);
i.putExtra("ruta",ruta);
startActivity(i);
}
}
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
public String getRealPathFromURI(Uri uri) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
return cursor.getString(idx);
}
然后,在 CameraActivity 上我收到图片的路径,我正在尝试将图片放在我的 ImageView 上
void events(){
Bundle extras = getIntent().getExtras();
ruta = extras.getString("ruta");
Bitmap imageBitmap = (Bitmap) extras.get(ruta);
imgWarike.setImageBitmap(imageBitmap);
}
但是位图为空。知道为什么会这样吗?提前致谢。
不是拍照然后获取路径,而是先选择您想要的路径,然后将图像保存在那里。看看下面的代码:
private File file;
private URI imageUri;
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
String name = String.valueOf(System.currentTimeMillis() + ".jpg");
file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
if (!file.exists()) {
file.mkdirs();
}
File photo = new File(file, name);
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photo));
imageUri = Uri.fromFile(photo);
startActivityForResult(intent, CAMERA_REQUEST);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
imageUri = data.getData();
Intent i = new Intent(getApplicationContext(), WarikeActivity.class);
i.putExtra("ruta", file);
startActivity(i);
}
}
您是否尝试遵循有关它的官方 Android 文档? http://developer.android.com/training/camera/photobasics.html
如果您试图从从 Intent 获得的路径中获取位图,请使用此代码。
Bitmap myBitmap = BitmapFactory.decodeFile(<yourFilepath>);
或者你在第一个activity中已经获取了位图,你直接通过intent发送位图如下。
你可以这样做:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
Intent i = new Intent(getApplicationContext(), WarikeActivity.class);
i.putExtra("foto", byteArray);
startActivity(i);
}
然后:
void events(){
byte[] byteArray = getIntent().getByteArrayExtra("foto");
Bitmap foto = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
imgFoto.setImageBitmap(foto);
}