缺少android.support.FILE_PROVIDER_PATHS元数据 [英] Missing android.support.FILE_PROVIDER_PATHS meta-data
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问题描述
我正在尝试打开我下载的& pdf文件.保存在外部存储中.但是当我打开我的应用程序时，它崩溃了，并显示以下错误；
I am trying to open the pdf file which I downloaded & saved in external storage. But When I open my app its gets crashed and showing following error;
08-31 00:58:31.304 1807-1807/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: medimanage.corporate.mobile, PID: 1807
java.lang.RuntimeException: Unable to get provider android.support.v4.content.FileProvider: java.lang.IllegalArgumentException: Missing android.support.FILE_PROVIDER_PATHS meta-data
at android.app.ActivityThread.installProvider(ActivityThread.java:5856)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:5445)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5384)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1545)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.IllegalArgumentException: Missing android.support.FILE_PROVIDER_PATHS meta-data
at android.support.v4.content.FileProvider.parsePathStrategy(FileProvider.java:586)
at android.support.v4.content.FileProvider.getPathStrategy(FileProvider.java:557)
at android.support.v4.content.FileProvider.attachInfo(FileProvider.java:375)
at android.app.ActivityThread.installProvider(ActivityThread.java:5853)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:5445)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5384)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1545)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
以下是我的异步任务，我在该任务中下载了pdf文件&试图打开它.
Following is my async task where I download that pdf file & trying to open it.
package myPackageName.common.postData;
public class DownloadFileFromURL extends AsyncTask<String, String, String> {
private ProgressDialog Dialog;
private Context mContext;
private String folder_main; //= "TermCondition";
private String fileName;//= "termCondition.pdf";
String urlString;
public DownloadFileFromURL(Context mContext, String folderName) {
this.mContext = mContext;
this.folder_main = folderName;
Dialog = new ProgressDialog(this.mContext);
}
@Override
protected String doInBackground(String... f_url) {
try {
urlString = f_url[0];
URL url = new URL(f_url[0]);
File folder = new File(Environment.getExternalStorageDirectory(), this.folder_main);
if (folder.exists()) {
folder.mkdirs();
}
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
InputStream inputStream = urlConnection.getInputStream();
FileOutputStream fileOutputStream = new FileOutputStream(Environment.getExternalStorageDirectory() + "/" + "default.pdf");
int totalSize = urlConnection.getContentLength();
byte[] buffer = new byte[AccessibilityNodeInfoCompat.ACTION_DISMISS];
while (true) {
int bufferLength = inputStream.read(buffer);
if (bufferLength <= 0) {
break;
}
fileOutputStream.write(buffer, 0, bufferLength);
}
fileOutputStream.close();
} catch (FileNotFoundException e) {
FileLog.e(mContext.getClass().getName(), e);
} catch (MalformedURLException e2) {
FileLog.e(mContext.getClass().getName(), e2);
} catch (IOException e3) {
FileLog.e(mContext.getClass().getName(), e3);
}
return null;
}
public void showPdf() {
try {
File file = new File(Environment.getExternalStorageDirectory() + "/" + "default.pdf");
try {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Uri contentUri = FileProvider.getUriForFile(mContext, "medimanage.corporate.mobile.fileprovider", file);
intent.setDataAndType(contentUri, "application/pdf");
} else {
intent.setDataAndType(Uri.fromFile(file), "application/pdf");
}
mContext.startActivity(intent);
} catch (ActivityNotFoundException anfe) {
Toast.makeText(mContext, "No activity found to open this attachment.", Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
FileLog.e(mContext.getClass().getName(), e);
}
}
@Override
protected void onPreExecute() {
Dialog.setMessage("Downloading...");
Dialog.setCancelable(false);
Dialog.setCanceledOnTouchOutside(false);
Dialog.show();
}
@Override
protected void onPostExecute(String s) {
this.Dialog.dismiss();
showPdf();
super.onPostExecute(s);
}
}
以下是AndroidManifest.xml
Following is AndroidManifest.xml
<application
...>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="myPackageName.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDE_PATHS"
android:resource="@xml/provider_paths" />
</provider>
</application>
和具有以下代码的provider_paths.xml；
And provider_paths.xml having following code;
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path path="Android/data/" name="files_root" />
<external-path path="." name="external_storage_root" />
</paths>
我正在尝试在API 19&中运行以上代码； API 25，但在这两种设备中都会崩溃.我无法找出我要去哪里.
I am trying to run above code in API 19 & API 25, but in both devices its gets crash. I am not able to find out where I am going wrong.
I have referred this question & also this link too but not able to find a solution to my issue.
推荐答案
在您的AndroidManifest文件中，元数据中有一个轻微的错字:
In your AndroidManifest file, you have a slight typo in the metadata:
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS" <-- HERE!!!
android:resource="@xml/provider_paths" />
您需要使用FILE_PROVIDER_PATHS而不是FILE_PROVIDE_PATHS.
You need to use FILE_PROVIDER_PATHS instead of FILE_PROVIDE_PATHS.
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