Android 安卓相机意图
我需要推送一个意图到默认相机应用程序,使其拍摄照片,保存并返回URI。有什么方法可以做到这一点吗?试试我发现的以下方法 试试这个代码Android 安卓相机意图,android,android-camera,android-camera-intent,Android,Android Camera,Android Camera Intent,我需要推送一个意图到默认相机应用程序,使其拍摄照片,保存并返回URI。有什么方法可以做到这一点吗?试试我发现的以下方法 试试这个代码 Intent photo= new Intent("android.media.action.IMAGE_CAPTURE"); startActivityForResult(photo, CAMERA_PIC_REQUEST); 我花了好几个小时才把它修好。代码几乎是复制粘贴而来,只是有一点不同 在AndroidManif
Intent photo= new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(photo, CAMERA_PIC_REQUEST);
我花了好几个小时才把它修好。代码几乎是复制粘贴而来,只是有一点不同 在
AndroidManifest.xml
上请求此权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
然后在一个onClick
中触发此Intent
:
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (cameraIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
Log.i(TAG, "IOException");
}
// Continue only if the File was successfully created
if (photoFile != null) {
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
startActivityForResult(cameraIntent, REQUEST_IMAGE_CAPTURE);
}
}
添加以下支持方法:
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, // prefix
".jpg", // suffix
storageDir // directory
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}
然后接收结果:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
try {
mImageBitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), Uri.parse(mCurrentPhotoPath));
mImageView.setImageBitmap(mImageBitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}
使它工作的是
MediaStore.Images.Media.getBitmap(this.getContentResolver(),Uri.parse(mCurrentPhotoPath))
,它与源代码不同。原始代码给了我一个FileNotFoundException
试试下面我在这里找到的
如果您的应用程序以M及以上为目标,并声明为使用未授予的摄像头权限,则尝试使用此操作将导致SecurityException
EasyImage.openCamera(活动,int类型)代码>
@覆盖
受保护的void onActivityResult(int请求代码、int结果代码、意图数据){
super.onActivityResult(请求代码、结果代码、数据);
handleActivityResult(请求代码、结果代码、数据、this、新的DefaultCallback(){
@凌驾
public void onImagePickerError(异常e,EasyImage.ImageSource源,int类型){
//一些错误处理
}
@凌驾
公共无效onImagesPicked(列出图像文件,EasyImage.ImageSource源,int类型){
//处理图像
返回的图像(图像文件);
}
});
}
我找到了一个非常简单的方法。使用按钮打开它,使用单击
侦听器启动函数openc()
,如下所示:
String fileloc;
private void openc()
{
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = null;
try
{
f = File.createTempFile("temppic",".jpg",getApplicationContext().getCacheDir());
if (takePictureIntent.resolveActivity(getPackageManager()) != null)
{
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,FileProvider.getUriForFile(profile.this, BuildConfig.APPLICATION_ID+".provider",f));
fileloc = Uri.fromFile(f)+"";
Log.d("texts", "openc: "+fileloc);
startActivityForResult(takePictureIntent, 3);
}
}
catch (IOException e)
{
e.printStackTrace();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 3 && resultCode == RESULT_OK) {
Log.d("texts", "onActivityResult: "+fileloc);
// fileloc is the uri of the file so do whatever with it
}
}
您可以使用uri
location字符串执行任何操作。例如,我将其发送到图像裁剪器以裁剪图像。谢谢,但拍摄的照片没有保存到设备,因此我在Uri=Uri.parse(data.toURI())中获得FileNotFoundException;bitmap=android.provider.MediaStore.Images.Media.getBitmap(contentResolver,uri);您是说您拍摄的图片没有按照您的选择存储在手机/设备上,还是发生了什么事情,即使您让它将图像存储在手机/设备上,它也会表现得好像没有保存一样?我是说,图片不会自动存储在设备上,而是在onActivityResult()中以位图的形式返回。不过,我找到了一个解决方案,我会在回答中提到。这是更好的答案。顶部答案会保存图像的不必要副本。这在用户画廊的应用程序中显示为两个图像,而不是一个,大多数人都认为它是一个bug。这很好,尽管您可能需要:私有静态int TopyPoint=1;不适用于GALAXY S手机:(为什么是硬编码的“android.media.action.IMAGE_CAPTURE”。它可能在某些手机上不起作用。有没有标准?可能是关于Intent.action_GET_内容的?kilaka,MediaStore.action_IMAGE_CAPTURE您可能需要在android>M中使用文件提供商
。请看,这篇文章由于质量太差而被自动标记为低质量。)只有代码。你介意通过添加一些文本来扩展它来解释它是如何解决问题的吗?对我来说也是。我想你为我节省了几个小时。你知道为什么Android开发代码会出现IO异常吗?请参阅此库中的以下链接。无法设置照片的输出路径,而且在我看来也存在一些错误
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, // prefix
".jpg", // suffix
storageDir // directory
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
try {
mImageBitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), Uri.parse(mCurrentPhotoPath));
mImageView.setImageBitmap(mImageBitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
EasyImage.handleActivityResult(requestCode, resultCode, data, this, new DefaultCallback() {
@Override
public void onImagePickerError(Exception e, EasyImage.ImageSource source, int type) {
//Some error handling
}
@Override
public void onImagesPicked(List<File> imagesFiles, EasyImage.ImageSource source, int type) {
//Handle the images
onPhotosReturned(imagesFiles);
}
});
}
String fileloc;
private void openc()
{
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = null;
try
{
f = File.createTempFile("temppic",".jpg",getApplicationContext().getCacheDir());
if (takePictureIntent.resolveActivity(getPackageManager()) != null)
{
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,FileProvider.getUriForFile(profile.this, BuildConfig.APPLICATION_ID+".provider",f));
fileloc = Uri.fromFile(f)+"";
Log.d("texts", "openc: "+fileloc);
startActivityForResult(takePictureIntent, 3);
}
}
catch (IOException e)
{
e.printStackTrace();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 3 && resultCode == RESULT_OK) {
Log.d("texts", "onActivityResult: "+fileloc);
// fileloc is the uri of the file so do whatever with it
}
}