摄像头选择内容未在Android M上启动
我无法从Galery和Camera应用程序中拾取图像。我跟在后面。问题是摄像头选择内容没有在Android M上发布,其他版本正在发布,但Galery的目的是发布。那么如何修复它呢 这是选择内容:摄像头选择内容未在Android M上启动,android,android-camera,Android,Android Camera,我无法从Galery和Camera应用程序中拾取图像。我跟在后面。问题是摄像头选择内容没有在Android M上发布,其他版本正在发布,但Galery的目的是发布。那么如何修复它呢 这是选择内容: public static Intent getPickImageIntent(Context context) { Intent chooserIntent = null; List<Intent> intentList = new ArrayList&
public static Intent getPickImageIntent(Context context) {
Intent chooserIntent = null;
List<Intent> intentList = new ArrayList<>();
Intent pickIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
takePhotoIntent.putExtra("return-data", true);
takePhotoIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile(context)));
intentList = addIntentsToList(context, intentList, pickIntent);
intentList = addIntentsToList(context, intentList, takePhotoIntent);
if (intentList.size() > 0) {
chooserIntent = Intent.createChooser(intentList.remove(intentList.size() - 1),
context.getString(R.string.pick_image_intent_text));
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentList.toArray(new Parcelable[]{}));
}
return chooserIntent;
}
对于开放式摄像机,您可以使用它
static final int CAMERA_REQ_CODE = 1;
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
fileUri = Uri.fromFile(yourFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
startActivityForResult(intent, CAMERA_REQ_CODE);
编辑:运行时权限只是一个问题。我想知道为什么你的应用程序没有崩溃,当你没有要求相机的许可,我明白了。这是因为你从不打开相机:
chooserIntent = Intent.createChooser(intentList.remove(intentList.size() - 1),
context.getString(R.string.pick_image_intent_text));
您删除了intentList中的最后一个意图,即takePhotoIntent。因此intentList只包含pickIntent。这就是为什么
安卓M随附。某些权限需要由用户授予,应用程序才能使用它们。在这种情况下,它们是摄像头和外部存储器。因此,您必须请求权限:
public void onPickImage(View view) {
askForCameraPermission();
}
private void askForCameraPermission() {
// Neither CAMERA or WRITE_EXTERNAL_STORAGE is granted
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED
&& ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.CAMERA)
|| ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
// Show an expanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Permissions needed");
builder.setMessage("Some explanations");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// User understands the situation, now ask for permissions
ActivityCompat.requestPermissions(SimpleActivity.this,
new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE},
PERMISSIONS_REQUEST_CAMERA);
}
});
builder.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE},
PERMISSIONS_REQUEST_CAMERA);
}
} else {
// Permissions are already granted before
Intent chooseImageIntent = ImagePicker.getPickImageIntent(this);
startActivityForResult(chooseImageIntent, PICK_IMAGE_ID);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case PERMISSIONS_REQUEST_CAMERA: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay!
Intent chooseImageIntent = ImagePicker.getPickImageIntent(this);
startActivityForResult(chooseImageIntent, PICK_IMAGE_ID);
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
// Blame user
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Error");
builder.setMessage("Y u do dis?!");
builder.setPositiveButton("Nah", null);
builder.show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
在安卓M中,运行时权限发生了重大变化。为了使用相机,您必须在运行时授予权限。看看这个链接,它解释了如何处理权限请求流:
仍未启动照相机:
public void onPickImage(View view) {
askForCameraPermission();
}
private void askForCameraPermission() {
// Neither CAMERA or WRITE_EXTERNAL_STORAGE is granted
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED
&& ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.CAMERA)
|| ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
// Show an expanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Permissions needed");
builder.setMessage("Some explanations");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// User understands the situation, now ask for permissions
ActivityCompat.requestPermissions(SimpleActivity.this,
new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE},
PERMISSIONS_REQUEST_CAMERA);
}
});
builder.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE},
PERMISSIONS_REQUEST_CAMERA);
}
} else {
// Permissions are already granted before
Intent chooseImageIntent = ImagePicker.getPickImageIntent(this);
startActivityForResult(chooseImageIntent, PICK_IMAGE_ID);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case PERMISSIONS_REQUEST_CAMERA: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay!
Intent chooseImageIntent = ImagePicker.getPickImageIntent(this);
startActivityForResult(chooseImageIntent, PICK_IMAGE_ID);
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
// Blame user
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Error");
builder.setMessage("Y u do dis?!");
builder.setPositiveButton("Nah", null);
builder.show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}