在我的Android应用程序中,我必须使用相机按钮单击拍摄图像。它在所有Android版本中工作完美除了android 7(Nougat)。当我点击相机选项时,即使权限打开,应用程序也会退出。我认为问题出在相机调用intent.Below是我的代码。
camera = (ImageView) dialog.findViewById(R.id.camera);
camera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
clickCamera();
dialog.dismiss();
}
});
private void clickCamera() { // 1 for icon and 2 for attachment
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.CAMERA},MY_REQUEST_CODE);
}else {
if (ActivityCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, MY_REQUEST_CODE_STORAGE);
}else{
currentImageUri = getImageFileUri();
Intent intentPicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intentPicture.putExtra(MediaStore.EXTRA_OUTPUT, currentImageUri); // set the image file name
// start the image capture Intent
startActivityForResult(intentPicture, REQUEST_CAMERA); // 1 for REQUEST_CAMERA and 2 for REQUEST_CAMERA_ATT
}
}
}
private static Uri getImageFileUri(){
// Create a storage directory for the images
// To be safe(er), you should check that the SDCard is mounted
// using Environment.getExternalStorageState() before doing this
imagePath = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyProject");
if (! imagePath.exists()){
if (! imagePath.mkdirs()){
return null;
}else{
//create new folder
}
}
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File image = new File(imagePath,"MyProject_"+ timeStamp + ".jpg");
if(!image.exists()){
try {
image.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
// Create an File Uri
return Uri.fromFile(image);
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_REQUEST_CODE: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
if (ActivityCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, MY_REQUEST_CODE_STORAGE);
}else{
currentImageUri = getImageFileUri();
Intent intentPicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intentPicture.putExtra(MediaStore.EXTRA_OUTPUT, currentImageUri); // set the image file name
// start the image capture Intent
startActivityForResult(intentPicture, REQUEST_CAMERA);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this,"Doesn't have permission... ", Toast.LENGTH_SHORT).show();
}
return;
}
case MY_REQUEST_CODE_STORAGE : {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
currentImageUri = getImageFileUri();
Intent intentPicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intentPicture.putExtra(MediaStore.EXTRA_OUTPUT, currentImageUri); // set the image file name
// start the image capture Intent
startActivityForResult(intentPicture, REQUEST_CAMERA);
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this,"Doesn't have permission...", Toast.LENGTH_SHORT).show();
}
return;
}
}
}
Nougat的问题是什么。是因为getImageFileUri()返回的uri?请帮我解决这个问题。
答案 0 :(得分:6)
嘿,请关注this thread作为参考。当您将targetSDK设置为24并更改以下内容时,它将向您展示如何使用文件提供程序。在private static Uri getImageFileUri()
方法
更改此行
return Uri.fromFile(image);
到
FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".provider", createImageFile());
希望这可以帮助您解决问题。
更多信息,请访问 -
Setting Up File Sharing - Offical documentation
答案 1 :(得分:5)
尝试这不是创造问题的意图,一旦你拍照并保存到SD卡并且回到uri在Nougat中是不同的....
在您的应用程序上实现FileProvider非常容易。首先,您需要在AndroidManifest.xml中的标签下添加一个FileProvider标签,如下所示:AndroidManifest.xml
select [Pers#No#],
stuff(( Select distinct ', ' +
cast( [Bank Account] as varchar(20) ) + ' ' +
cast( [Bank Keys] as varchar(20) )
FROM [DATA].[dbo].[PA0009] as S
where S.[Pers#No#] = T.[Pers#No#]
For XML PATH('')),1,1,'' ) as whatever
from [DATA].[dbo].[PA0009]
group by [Pers#No#]
然后在res文件夹下的xml文件夹中创建一个provider_paths.xml文件。如果文件夹不存在,可能需要创建文件夹。
RES / XML / provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
...
<application
...
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"/>
</provider>
</application>
</manifest>
完成! FileProvider现已声明并可以使用。
最后一步是在MainActivity.java中更改下面的代码行
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
到
Uri photoURI = Uri.fromFile(createImageFile());
......完成了!您的应用程序现在可以在包括Android Nougat在内的任何Android版本上完美运行。干杯!
答案 2 :(得分:4)
Android的工作就是让每个更新都让开发人员过上生活的地狱:)
googlers,这是一个循序渐进的指南,供开发人员(比如问题)使用Android文档中的示例;
1-在您使用的部分
Uri.fromFile(image)
您需要使用此代码段:
Uri photoURI = FileProvider.getUriForFile(mContext,
"com.sample.test.fileprovider",
image);
当然不用说,您必须将com.sample.test
更改为您的包名。
2-现在您需要在AndroidManifest.xml中声明您的提供者,在Application标签下粘贴此标记:
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.sample.test.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
3-注意android:resource="@xml/file_paths"
您需要在file_paths
文件夹下创建一个名称为res/xml/
的xml文件并将其放入其中:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="pictures"/>
</paths>
关于网络上的其他几个片段,以及文档本身,它说你需要写这个
<external-path name="my_images" path="Android/data/com.example.package.name/files/Pictures" />
而不是我们的,它实际上取决于您的代码,如果您使用Environment.getExternalStorageDirectory().getPath()
创建文件而您不需要它,但如果您完全按照文档进行操作,则需要坚持使用文档
答案 3 :(得分:1)
此处修复了7.0版本中的相机意图问题
file://不允许(Android N)与Intent连接或者它将会附加 抛出FileUriExposedException,这可能会导致您的应用程序立即被调用崩溃。
请检查问题的全部细节&amp;溶液
答案 4 :(得分:-1)
使用文件提供程序,它会帮助您