Fer*_*nch 5 camera android image
我想让用户从相机或设备中的现有图片(图库或其他)拍摄照片.我怎样才能做到这一点？
我已经实现了下面的解决方案,这似乎工作正常,但文档很混乱,所以我想知道是否有更好的解决方案.
另外,请查看此相关帖子.在那里,您将看到如何获取图像路径或位图:以编程方式从Android的内置Gallery应用程序中获取/选择图像
因此,在我的解决方案中,您将创建一个TakePictureHelper对象并执行以下操作.
假设您显示一个对话框,用户可以选择"相机"或"其他".当用户选择一个选项时,您可以调用takeFromCamera()或takeFromOther().拍摄(或不拍摄)照片时,onActivityResult()将调用该方法.在那里你会打电话retrievePicture,它将返回图片的Uri,如果没有拍照,则返回null.
如果我不清楚,请告诉我你的想法,分享想法或问我什么.
非常感谢你!
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
public class TakePictureHelper {
public final static int REQUEST_CAMERA = 1;
public final static int REQUEST_OTHER = 2;
private Uri cameraImageUri;
/**
* Request picture from camera using the given title
*/
public void takeFromCamera(Activity activity, String title)
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File cameraImageOutputFile = new File(
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
createCameraImageFileName());
cameraImageUri = Uri.fromFile(cameraImageOutputFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, cameraImageUri);
activity.startActivityForResult(Intent.createChooser(intent, title), REQUEST_CAMERA);
}
/**
* Request picture from any app (gallery or whatever) using the given title
*/
public void takeFromOther(Activity activity, String title)
{
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
activity.startActivityForResult(Intent.createChooser(intent, title), REQUEST_OTHER);
}
/**
* Retrieve the picture, taken from camera or gallery.
*
* @return the picture Uri, or null if no picture was taken.
*/
public Uri retrievePicture(Activity activity, int requestCode, int resultCode, Intent data)
{
Uri result = null;
if (resultCode == Activity.RESULT_OK) {
if (requestCode == REQUEST_OTHER) {
result = data.getData();
} else if (requestCode == REQUEST_CAMERA) {
result = cameraImageUri;
}
}
return result;
}
private String createCameraImageFileName() {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
return timeStamp + ".jpg";
}
}
基于@yurezcv 的回答，这是我想出的（最重要的是如何在 onActivityResult 中检索图像）：
private List<File> cameraImageFiles;
private void popImageChooser(){
// Camera.
final List<Intent> cameraIntents = new ArrayList<Intent>();
final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
final PackageManager packageManager = getPackageManager();
final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
cameraImageFiles = new ArrayList<File>();
int i=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");
File cameraImageOutputFile = new File(
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
createCameraImageFileName());
cameraImageFiles.add(cameraImageOutputFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(cameraImageFiles.get(i)));
i++;
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, getString(R.string.attach_images_title));
// Add the camera options.
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[]{}));
startActivityForResult(chooserIntent, ACTIVITY_REQUEST_CODE_IMAGE);
}
protected void onActivityResult(int requestCode, int resultCode,
Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch(requestCode) {
case ACTIVITY_REQUEST_CODE_IMAGE:
if(resultCode == RESULT_OK){
Uri uri = null;
if(imageReturnedIntent == null){ //since we used EXTRA_OUTPUT for camera, so it will be null
for(int i=0;i<cameraImageFiles.size();i++){
if(cameraImageFiles.get(i).exists()){
uri = Uri.fromFile(cameraImageFiles.get(i));
break;
}
}
Log.d("attachimage", "from camera: "+uri);
}
else { // from gallery
uri = imageReturnedIntent.getData();
Log.d("attachimage", "from gallery: "+uri.toString());
}
if(uri != null){
attachImage(uri);
}
}
}
}
这个解决方案对我有用：
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 = 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, getString(R.string.add_new));
// Add the camera options.
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[]{}));
startActivityForResult(chooserIntent, YOUR_REQUEST_CODE);
}
它创建一个意图对话框，其中包含所有可能的变体，用于从相机、文件系统等中选择图像。