带有相机的Android N中的FileUriExposedException [英] FileUriExposedException in Android N with Camera
本文介绍了带有相机的Android N中的FileUriExposedException的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
MainActivity
import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.Parcelable;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button mBtn;
private Context context;
private static final int SELECT_PICTURE_CAMARA = 101, SELECT_PICTURE = 201, CROP_IMAGE = 301;
private Uri outputFileUri;
String mCurrentPhotoPath;
private Uri selectedImageUri;
private File finalFile = null;
private ImageView imageView;
private PermissionUtil permissionUtil;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mBtn = (Button) findViewById(R.id.btn_img);
imageView = (ImageView) findViewById(R.id.img_photo);
permissionUtil = new PermissionUtil();
mBtn.setOnClickListener(this);
context = this;
}
@Override
public void onClick(View view) {
selectImageOption();
}
private void selectImageOption() {
final CharSequence[] items = {"Capture Photo", "Choose from Gallery", "Cancel"};
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Add Photo!");
builder.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
if (items[item].equals("Capture Photo")) {
if (permissionUtil.checkMarshMellowPermission()) {
if (permissionUtil.verifyPermissions(MainActivity.this, permissionUtil.getCameraPermissions()))
onClickCamera();
else
ActivityCompat.requestPermissions(MainActivity.this, permissionUtil.getCameraPermissions(), SELECT_PICTURE_CAMARA);
} else
onClickCamera();
} else if (items[item].equals("Choose from Gallery")) {
if (permissionUtil.checkMarshMellowPermission()) {
if (permissionUtil.verifyPermissions(MainActivity.this, permissionUtil.getGalleryPermissions()))
onClickGallery();
else
ActivityCompat.requestPermissions(MainActivity.this, permissionUtil.getGalleryPermissions(), SELECT_PICTURE);
} else
onClickGallery();
} else if (items[item].equals("Cancel")) {
dialog.dismiss();
}
}
});
builder.show();
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
selectedImageUri = data.getData();
cropImage(selectedImageUri);
} else if (requestCode == CROP_IMAGE) {
/*if (data != null) {
// get the returned data
Bundle extras = data.getExtras();
// get the cropped bitmap
Bitmap selectedBitmap = extras.getParcelable("data");
imageView.setImageBitmap(selectedBitmap);
}*/
Uri imageUri = Uri.parse(mCurrentPhotoPath);
File file = new File(imageUri.getPath());
try {
InputStream ims = new FileInputStream(file);
imageView.setImageBitmap(BitmapFactory.decodeStream(ims));
} catch (FileNotFoundException e) {
return;
}
} else if (requestCode == SELECT_PICTURE_CAMARA && resultCode == Activity.RESULT_OK) {
cropImage(Uri.parse(mCurrentPhotoPath));
}
}
}
private void onClickCamera() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(context.getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
}
if (photoFile != null) {
Uri photoURI;
if (Build.VERSION.SDK_INT >= 24) {
photoURI = FileProvider.getUriForFile(MainActivity.this,
BuildConfig.APPLICATION_ID + ".provider", photoFile);
} else {
photoURI = Uri.fromFile(photoFile);
}
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, SELECT_PICTURE_CAMARA);
}
}
}
private void onClickGallery() {
List<Intent> targets = new ArrayList<>();
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_PICK);
intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
List<ResolveInfo> candidates = getApplicationContext().getPackageManager().queryIntentActivities(intent, 0);
for (ResolveInfo candidate : candidates) {
String packageName = candidate.activityInfo.packageName;
if (!packageName.equals("com.google.android.apps.photos") && !packageName.equals("com.google.android.apps.plus") && !packageName.equals("com.android.documentsui")) {
Intent iWantThis = new Intent();
iWantThis.setType("image/*");
iWantThis.setAction(Intent.ACTION_PICK);
iWantThis.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
iWantThis.setPackage(packageName);
targets.add(iWantThis);
}
}
if (targets.size() > 0) {
Intent chooser = Intent.createChooser(targets.remove(0), "Select Picture");
chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, targets.toArray(new Parcelable[targets.size()]));
startActivityForResult(chooser, SELECT_PICTURE);
} else {
Intent intent1 = new Intent(Intent.ACTION_PICK);
intent1.setType("image/*");
startActivityForResult(Intent.createChooser(intent1, "Select Picture"), SELECT_PICTURE);
}
}
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 = context.getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
if (Build.VERSION.SDK_INT >= 24) {
mCurrentPhotoPath = String.valueOf(FileProvider.getUriForFile(MainActivity.this,
BuildConfig.APPLICATION_ID + ".provider", image));
} else {
mCurrentPhotoPath = String.valueOf(Uri.fromFile(image));
}
return image;
}
private void cropImage(Uri selectedImageUri) {
Intent cropIntent = new Intent("com.android.camera.action.CROP");
cropIntent.setDataAndType(selectedImageUri, "image/*");
cropIntent.putExtra("crop", "true");
cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1.5);
cropIntent.putExtra("return-data", true);
outputFileUri = Uri.fromFile(createCropFile());
cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(cropIntent, CROP_IMAGE);
}
private File createCropFile() {
File storageDir = context.getExternalFilesDir(Environment.DIRECTORY_PICTURES);
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
// path = path + (timeStamp + "1jpg");
File file = null;
try {
file = File.createTempFile(timeStamp, ".jpg", storageDir);
} catch (IOException e) {
e.printStackTrace();
}
mCurrentPhotoPath = String.valueOf(Uri.fromFile(file));
return file;
}
}
PermissionUtil.java
package com.example.shwetachauhan.imagecropasoebi;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.v4.app.ActivityCompat;
public class PermissionUtil {
private String[] galleryPermissions = {
"android.permission.WRITE_EXTERNAL_STORAGE",
"android.permission.READ_EXTERNAL_STORAGE"
};
private String[] cameraPermissions = {
"android.permission.CAMERA",
"android.permission.WRITE_EXTERNAL_STORAGE",
"android.permission.READ_EXTERNAL_STORAGE"
};
public String[] getGalleryPermissions(){
return galleryPermissions;
}
public String[] getCameraPermissions() {
return cameraPermissions;
}
public boolean verifyPermissions(int[] grantResults) {
if(grantResults.length < 1){
return false;
}
for (int result : grantResults) {
if (result != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
return true;
}
public boolean verifyPermissions(Context context, String[] grantResults) {
for (String result : grantResults) {
if (ActivityCompat.checkSelfPermission(context, result) != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
return true;
}
public boolean checkMarshMellowPermission(){
return(Build.VERSION.SDK_INT> Build.VERSION_CODES.LOLLIPOP_MR1);
}
public boolean checkJellyBean(){
return(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN);
}
}
- 此代码用于从相机"或图库"中选择要裁剪的图像
- 此代码适用于所有android操作系统，但是当我尝试在Android N设备上运行时，打开Camera会崩溃.在带有Gallery的Android N中可以正常使用.
推荐答案
我在 Android N设备中也遇到过同样的问题.但我解决了.
这是我的代码，可以解决此问题:
Here is my code which can solve the issue:
public void launchCamera() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
intent.putExtra(MediaStore.EXTRA_OUTPUT, getPhotoFileUri());
} else {
File file = new File(getPhotoFileUri().getPath());
Uri photoUri = FileProvider.getUriForFile(getApplicationContext(), getApplicationContext().getPackageName() + ".provider", file);
intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
}
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
if (intent.resolveActivity(getApplicationContext().getPackageManager()) != null) {
startActivityForResult(intent, REQUEST_CAMERA);
}
}
此后，您需要在res中创建一个 XML文件夹，然后在该文件夹中创建一个标记为 provider_paths.xml
After this you need to create a XML folder in res, and in that folder you need to create a xml labeled provider_paths.xml
provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
稍后在清单中，您需要在应用标签中添加以下内容，并确保 compileSdkVersion> = 24
Later in manifest you need to add the following inside the application tag and make sure that the compileSdkVersion >=24
<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>
以下是两个参考链接，它们可以指导您更好地理解.
Here are the two reference links which can guide you better for better understanding.
链接:
link1 -来自媒体合作
link2 -来自inthecheesefactory
link2 - from inthecheesefactory
这篇关于带有相机的Android N中的FileUriExposedException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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