适配Android N （7.0）需要解决的问题汇总

java.lang.SecurityException: MODE_WORLD_READABLE no longer supported异常的原因与解决

// 在Android N之后，下面俩种情况会出SecurityException
FileOutputStream fos = context.openFileOutput(name,Context.MODE_WORLD_READABLE);

SharedPreferences sp = context.getSharedPreferences("", Context.MODE_WORLD_READABLE)

FileOutputStream fos = context.openFileOutput(name,Context.MODE_PRIVATE);

SharedPreferences sp = context.getSharedPreferences("", Context.MODE_PRIVATE)

FileProvider去获取图片的Uri(FileUriExposedException异常的原因与解决)

String imagePath= Environment.getExternalStorageDirectory()+"/demo/"

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

String fileName = "image.jpg";

File file = new File(CACHE_IMG, fileName);

Uri uri = Uri.fromFile(file);  // 获取照片的Uri

intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);

startActivityForResult(intent, 100);

<application
...>
<provider
android:name="android.support.v4.content.FileProvider"        //固定值
android:authorities="com.dujun.demo.fileprovider"              //路径 前面为包名，后面为fileprovider固定值，使用包名便于区分
android:exported="false"                                //是否支持其它应用调用当前组件 ，要求为flase
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"            //固定值
android:resource="@xml/filepaths"/>                           //在res目录下xml文件夹下定义的filepaths.xml文件，名字可以自定义
</provider>
</application>

<paths>
<external-path path="demo" name="my_demo" >
</paths>

<files-path>

getFilesDir()

<cache-path>

getCacheDir()

<external-path>

Environment.getExternalStorageDirectory()

<external-files-path>

<external-cache-path>

<external-path path="demo/"

Environment.getExternalStorageDirectory()+"/demo/"

String imagePath= Environment.getExternalStorageDirectory()+"/demo/"

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

String fileName = "image.jpg";

File file = new File(CACHE_IMG, fileName);

Uri uriForFile = FileProvider.getUriForFile(context, "com.dujun.demo.fileprovider", file);      //

intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);

startActivityForResult(intent, 100);

Uri uri = Uri.fromFile(file);

Uri uriForFile = FileProvider.getUriForFile(context, "com.dujun.demo.fileprovider", file);

4.4以下版本java.lang.SecurityException: Permission Denial异常的原因与解决。

@Override
public void attachInfo(Context context, ProviderInfo info) {
super.attachInfo(context, info);

// Sanity check our security
if (info.exported) {
throw new SecurityException("Provider must not be exported");
}
if (!info.grantUriPermissions) {
throw new SecurityException("Provider must grant uri permissions");
}

mStrategy = getPathStrategy(context, info.authority);
}

throw new SecurityException("Provider must not be exported");

解决方式1：授权

toPackage

int flag = Intent.FLAG_GRANT_READ_URI_PERMISSION
| Intent.FLAG_GRANT_WRITE_URI_PERMISSION
List<ResolveInfo> resInfoList = context.getPackageManager()
.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
for (ResolveInfo resolveInfo : resInfoList) {
String packageName = resolveInfo.activityInfo.packageName; // 获取到要授权的应用的包名
context.grantU
d40d
riPermission(packageName, uri, flag); // 调用授权代码进行授权
}

解决方式2(推荐)

Uri fileUri = null;
if (Build.VERSION.SDK_INT >= 24) {
fileUri = FileProvider.getUriForFile(context, "com.dujun.demo.fileprovider", file);
} else {
fileUri = Uri.fromFile(file);
}

使用FileProvider安装Apk

/**
* @params file 需要安装的apk文件
*/
public static void installApk(File file) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),
"application/vnd.android.package-archive");
startActivity(intent);
}

Uri fileUri = null;
if (Build.VERSION.SDK_INT >= 24) {
fileUri = FileProvider.getUriForFile(context, "com.dujun.demo.fileprovider", file);
} else {
fileUri = Uri.fromFile(file);
}

intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

引入的第三方库中已经配置了FileProvider(Manifest merger failed问题的解决)

Error:Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : Attribute meta-data#android.support.FILE_PROVIDER_PATHS@resource value=(@xml/filepath) from AndroidManifest.xml:815:17-49
is also present at [com.jph.takephoto:takephoto_library:4.0.3] AndroidManifest.xml:24:17-51 value=(@xml/file_paths).
Suggestion: add 'tools:replace="android:resource"' to <meta-data> element at AndroidManifest.xml:813:13-815:52 to override.

is also present at [com.jph.takephoto:takephoto_library:4.0.3] AndroidManifest.xml:24:17-51 value=(@xml/file_paths).

com.jph.takephoto:takephoto_library

Suggestion: add 'tools:replace="android:resource"' to <meta-data> element at AndroidManifest.xml:813:13-815:52 to override.

<meta-data

tools:replace="android:resource"

xmlns:tools="http://schemas.android.com/tools"

<application
...>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.dujun.demo.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
tools:replace="android:resource"  <!--加入这句代码即可解决问题，需要在manifest节点加入命名空间-->
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/filepaths"/>
</provider>
</application>

总结

一些实用工具文旦下载地址：