android.os.FileUriExposedException: file:///storage/emulated/0/Pictures/picFolder/1.jpg 通过 ClipData.
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【中文标题】android.os.FileUriExposedException: file:///storage/emulated/0/Pictures/picFolder/1.jpg 通过 ClipData.Item.getUri() 暴露在应用程序之外【英文标题】：android.os.FileUriExposedException: file:///storage/emulated/0/Pictures/picFolder/1.jpg exposed beyond app through ClipData.Item.getUri() 【发布时间】：2018-08-06 01:19:00 【问题描述】：我正在尝试使用此代码从手机的相机中拍照：
activity_main.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical" >
<Button
android:id="@+id/btnCapture"
android:layout_
android:layout_
android:text="Camera" />
</LinearLayout>
MainActivity.java：
public class CameraDemoActivity extends Activity
int TAKE_PHOTO_CODE = 0;
public static int count = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Here, we are making a folder named picFolder to store
// pics taken by the camera using this application.
final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/";
File newdir = new File(dir);
newdir.mkdirs();
Button capture = (Button) findViewById(R.id.btnCapture);
capture.setOnClickListener(new View.OnClickListener()
public void onClick(View v)
// Here, the counter will be incremented each time, and the
// picture taken by camera will be stored as 1.jpg,2.jpg
// and likewise.
count++;
String file = dir+count+".jpg";
File newfile = new File(file);
try
newfile.createNewFile();
catch (IOException e)
Uri outputFileUri = Uri.fromFile(newfile);
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(cameraIntent, TAKE_PHOTO_CODE);
);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK)
Log.d("CameraDemo", "Pic saved");
我还在 Manifest.xml 中添加了这些权限：
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
但我收到此错误消息：
android.os.FileUriExposedException: file:///storage/emulated/0/Pictures/picFolder/1.jpg 暴露在应用程序之外 通过 ClipData.Item.getUri()
问题是什么，我该如何解决？
编辑：这是更新后的代码：
主活动：
package com.m.textdetection;
import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.icu.text.SimpleDateFormat;
import android.net.Uri;
import android.os.Environment;
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 java.io.File;
import java.io.IOException;
import java.util.Date;
public class MainActivity extends AppCompatActivity
private MyTessOCR mTessOCR = new MyTessOCR(MainActivity.this);
private Button takePictureButton;
private ImageView imageView;
/*
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
takePictureButton = (Button) findViewById(R.id.button_image);
imageView = (ImageView) findViewById(R.id.imageview);
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)
takePictureButton.setEnabled(false);
ActivityCompat.requestPermissions(this, new String[] Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE , 0);
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)
if (requestCode == 0)
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED
&& grantResults[1] == PackageManager.PERMISSION_GRANTED)
takePictureButton.setEnabled(true);
public void takePicture(View view)
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
file = Uri.fromFile(getOutputMediaFile());
intent.putExtra(MediaStore.EXTRA_OUTPUT, file);
startActivityForResult(intent, 100);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
if (requestCode == 100)
if (resultCode == RESULT_OK)
imageView.setImageURI(File);
private static File getOutputMediaFile()
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "CameraDemo");
if (!mediaStorageDir.exists())
if (!mediaStorageDir.mkdirs())
return null;
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
return new File(mediaStorageDir.getPath() + File.separator +
"IMG_"+ timeStamp + ".jpg");
*/
int TAKE_PHOTO_CODE = 0;
public static int count = 0;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/";
File newdir = new File(dir);
newdir.mkdirs();
Button capture = (Button) findViewById(R.id.btnCapture);
capture.setOnClickListener(new View.OnClickListener()
public void onClick(View v)
// Here, the counter will be incremented each time, and the
// picture taken by camera will be stored as 1.jpg,2.jpg
// and likewise.
count++;
String file = dir+count+".jpg";
File newfile = new File(file);
try
newfile.createNewFile();
catch (IOException e)
// Uri outputFileUri = Uri.fromFile(newfile);
Uri outputFileUri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID, newfile);
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(cameraIntent, TAKE_PHOTO_CODE);
);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK)
Log.d("CameraDemo", "Pic saved");
private void doOCR()
// String temp = mTessOCR.getOCRResult(bitmap);
清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.m.textdetection">
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="$applicationId.my.package.name.provider"
android:exported="false"
android:grantUriPermissions="true"
tools:replace="android:authorities">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"
tools:replace="android:resource"/>
</provider>
</application>
</manifest>
build.gradle(app):
apply plugin: 'com.android.application'
android
compileSdkVersion 27
buildToolsVersion "27.0.3"
defaultConfig
applicationId "com.m.textdetection"
minSdkVersion 21
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
dependencies
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2',
exclude group: 'com.android.support', module: 'support-annotations'
)
compile 'com.android.support:appcompat-v7:27.0.2'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
testCompile 'junit:junit:4.12'
compile 'com.rmtheis:tess-two:6.0.3'
compile 'com.android.support:support-v4:27.0.2'
这是新的错误：
java.lang.NullPointerException：尝试调用虚拟方法 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' 在空对象引用上
出现在这一行：
Uri outputFileUri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID, newfile);
编辑器2：
package com.m.textdetection;
import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.os.Environment;
import android.util.Log;
import com.googlecode.tesseract.android.TessBaseAPI;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
public class MyTessOCR
private String datapath;
private TessBaseAPI mTess;
Context context;
public MyTessOCR(Context context)
this.context = context;
datapath = Environment.getExternalStorageDirectory() + "/ocrctz/";
File dir = new File(datapath + "/tessdata/");
File file = new File(datapath + "/tessdata/" + "eng.traineddata");
if (!file.exists())
Log.d("mylog", "in file doesn't exist");
dir.mkdirs();
copyFile(context);
mTess = new TessBaseAPI();
String language = "eng";
mTess.init(datapath, language);
//Auto only
mTess.setPageSegMode(TessBaseAPI.PageSegMode.PSM_AUTO_ONLY);
public void stopRecognition()
mTess.stop();
public String getOCRResult(Bitmap bitmap)
mTess.setImage(bitmap);
String result = mTess.getUTF8Text();
return result;
public void onDestroy()
if (mTess != null)
mTess.end();
private void copyFile(Context context)
AssetManager assetManager = context.getAssets();
try
InputStream in = assetManager.open("eng.traineddata");
OutputStream out = new FileOutputStream(datapath + "/tessdata/" + "eng.traineddata");
byte[] buffer = new byte[1024];
int read = in.read(buffer);
while (read != -1)
out.write(buffer, 0, read);
read = in.read(buffer);
catch (Exception e)
Log.d("mylog", "couldn't copy with the following error : "+e.toString());
【问题讨论】：
AndroidManifest merge error using FileProvider的可能重复 【参考方案1】：如果您的 targetSdkVersion >= 24，那么我们必须使用 FileProvider 类来授予对特定文件或文件夹的访问权限，以便其他应用可以访问它们。
1) 首先在AndroidManifest.xml的标签下添加一个FileProvider标签，如下：
<?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.my.package.name.provider"
android:exported="false"
android:grantUriPermissions="true"
tools:replace="android:authorities">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"
tools:replace="android:resource"/>
</provider>
</application>
</manifest>
2) 然后在 res/xml 文件夹中创建 provider_paths.xml 文件。如果文件夹不存在，可能需要创建它。
<paths>
<external-path name="external_files" path="."/>
</paths>
3) 现在编辑您的活动类文件如下：
Uri outputFileUri = Uri.fromFile(newfile);
到
Uri outputFileUri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID, newfile);
更新 #1
用这个更新你的 MainActivity.java：
import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
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.IOException;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity
// private MyTessOCR mTessOCR = new MyTessOCR(MainActivity.this);
private Button takePictureButton;
private ImageView imageView;
int TAKE_PHOTO_CODE = 0;
public static int count = 0;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (checkPermissions())
// permissions granted.
final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/";
File newdir = new File(dir);
if (!newdir.exists())
newdir.mkdir();
Button capture = (Button) findViewById(R.id.btnCapture);
capture.setOnClickListener(new View.OnClickListener()
public void onClick(View v)
// Here, the counter will be incremented each time, and the
// picture taken by camera will be stored as 1.jpg,2.jpg
// and likewise.
count++;
String file = dir+count+".jpg";
File newfile = new File(file);
try
newfile.createNewFile();
catch (IOException e)
// Uri outputFileUri = Uri.fromFile(newfile);
Uri outputFileUri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID, newfile);
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(cameraIntent, TAKE_PHOTO_CODE);
);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK)
Log.d("CameraDemo", "Pic saved");
public static final int MULTIPLE_PERMISSIONS = 10; // code you want.
String[] permissions= new String[]
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.CAMERA,
Manifest.permission.ACCESS_COARSE_LOCATION,
Manifest.permission.ACCESS_FINE_LOCATION;
private boolean checkPermissions()
int result;
List<String> listPermissionsNeeded = new ArrayList<>();
for (String p:permissions)
result = ContextCompat.checkSelfPermission(MainActivity.this,p);
if (result != PackageManager.PERMISSION_GRANTED)
listPermissionsNeeded.add(p);
if (!listPermissionsNeeded.isEmpty())
ActivityCompat.requestPermissions(this, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]),MULTIPLE_PERMISSIONS );
return false;
return true;
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults)
switch (requestCode)
case MULTIPLE_PERMISSIONS:
if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
// permissions granted.
else
// Toast.makeText(this, "Go to settings and enable permissions", Toast.LENGTH_LONG)
// .show();
// permissions list of don't granted permission
return;
private void doOCR()
// String temp = mTessOCR.getOCRResult(bitmap);
【讨论】：
非常感谢，但这行代码android:name=".GenericFileProvider" 有问题。它是红色的，当我将它添加到 .MainActivity 时，它会显示 it's not assigned to contentProvider
在您的应用 build.gradle 中，添加此依赖项：compile 'com.android.support:support-v4:27.0.2'
然后用android:name="android.support.v4.content.FileProvider"替换android:name=".GenericFileProvider"
我按照你上面所说的做了，但是在这行代码中我得到了这个新错误java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference `Uri outputFileUri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID, newfile);`
一年后我发现了问题！它在.xml 文件provider_paths 中，我没有指定其中的路径！【参考方案2】：
试试这个！只需将以下代码粘贴到活动 onCreate() 中
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
它将忽略 URI 暴露
【讨论】：
分享图片时会返回不支持的文件格式以上是关于android.os.FileUriExposedException: file:///storage/emulated/0/Pictures/picFolder/1.jpg 通过 ClipData.的主要内容，如果未能解决你的问题，请参考以下文章