这个问题在这里已有答案：
我正在开发一个自定义相机应用程序，它捕获图片并将其存储在图库中。当我使用Intent.ACTION_SEND共享该图像时，除了具有API 26的设备（即OREO）之外，它在所有设备上都能正常工作。
我分享图片的代码是：
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.setType("image/jpeg");
Uri uriShare = Uri.fromFile(outFile);
//outfile is the path of the image stored in the gallery
shareIntent.putExtra(Intent.EXTRA_STREAM, uriShare);
startActivity(Intent.createChooser(shareIntent, ""));
任何人都可以帮我解决这个问题吗？
如果targetSdkVersion高于24，那么FileProvider用于授予访问权限。
创建一个xml文件（路径：res\xml）provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<root-path name="external_files" path="/" />
</paths>
在AndroidManifest.xml下添加提供商
<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>
并替换
Uri uri = Uri.fromFile(fileImagePath);
至
Uri uri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID + ".provider",fileImagePath);
你完成了
使用文件提供程序获取IMAGE URI并为intent添加标志...请仔细按照以下步骤进行操作.. android.os.FileUriExposedException: file:///storage/emulated/0/test.txt exposed beyond app through Intent.getData()此更新已完成，因为nougat ..
更多细节
读这个
https://developer.android.com/reference/android/support/v4/content/FileProvider.html
源代码
https://drive.google.com/open?id=1vfO43dMSt096CMp6nrOJNl3fJAf6MPwG
create xml folder inside providers_path.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>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.holostik.sharescreenshotexample">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.CAMERA"></uses-permission>
<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="com.holostik.sharescreenshotexample.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
</application>
</manifest>
package com.holostik.sharescreenshotexample;
import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
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.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.holostik.sharescreenshotexample.share.ScreenshotType;
import com.holostik.sharescreenshotexample.share.ScreenshotUtils;
import java.io.File;
import java.io.FileOutputStream;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
int n;
String photoPath;
LinearLayout rootContent;
ImageView iv_share;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rootContent = (LinearLayout) findViewById(R.id.rootContent);
iv_share = (ImageView) findViewById(R.id.iv_share);
iv_share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int permissionCheck = ContextCompat.checkSelfPermission(MainActivity.this,
Manifest.permission.CAMERA);
if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
Log.e("MainActivity ", "P granted");
takeScreenshot(ScreenshotType.FULL);
} else {
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.CAMERA,
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
}, 1);
}
} else {
Log.e("MainActivity", "Lower Than MarshMallow");
takeScreenshot(ScreenshotType.FULL);
}
}
});
}
/* Method which will take screenshot on Basis of Screenshot Type ENUM */
private void takeScreenshot(ScreenshotType screenshotType) {
Bitmap b = null;
switch (screenshotType) {
case FULL:
b = ScreenshotUtils.getScreenShot(rootContent);
break;
case CUSTOM:
//If Screenshot type is CUSTOM
break;
}
//If bitmap is not null
if (b != null) {
// showScreenShotImage(b);//show bitmap over imageview
Log.e("keshav", "bitmap is -- > " + b);
SaveImage(b);
shareScreenshot();
/* File saveFile = ScreenshotUtils.getMainDirectoryName(MainActivity.this);//get the path to save screenshot
File file = ScreenshotUtils.store(b, "screenshot" + screenshotType + ".jpg", saveFile);//save the screenshot to selected path
shareScreenshot(file);//finally share screenshot
Log.e("file Path", String.valueOf(file));
*/
} else
//If bitmap is null show toast message
Toast.makeText(MainActivity.this, R.string.screenshot_take_failed, Toast.LENGTH_SHORT).show();
}
private void SaveImage(Bitmap finalBitmap)
{
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/saved_images");
myDir.mkdirs();
Random generator = new Random();
n = 10000;
n = generator.nextInt(n);
String fname = "Image-" + n + ".jpg";
File file = new File(myDir, fname);
if (file.exists()) file.delete();
try {
FileOutputStream out = new FileOutputStream(file);
finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/* TODO Show screenshot Bitmap */
// private void showScreenShotImage(Bitmap b) {
// imageView.setImageBitmap(b);
// }
private void shareScreenshot()
{
photoPath = Environment.getExternalStorageDirectory() + "/saved_images" + "/Image-" + n + ".jpg";
File F = new File(photoPath);
//Uri U = Uri.fromFile(F);
// Uri U = FileProvider.getUriForFile(getActivity(), getActivity().getApplicationContext().getPackageName() + ".my.package.name.provider", F);
// TODO your package name as well add .fileprovider
Uri U = FileProvider.getUriForFile(MainActivity.this.getApplicationContext(), "com.holostik.sharescreenshotexample.fileprovider", F);
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("image/png");
i.putExtra(Intent.EXTRA_STREAM, U);
startActivityForResult(Intent.createChooser(i, "Email:"), 1);
}
// TODO Share Screen SHOT End ..............
}