共享 MODE_PRIVATE 中的应用创建的文件

Question

所以我有一个应用程序，它通过 FileOutputStream 将传感器数据写入 csv 文件MODE_PRIVATE

FileOutputStream fos = null;
try {
fos = context.openFileOutput(FILE_NAME,Context.MODE_PRIVATE);
for(int i = 0; i< signalList.size(); i++){
Signal s = signalList.get(i);
fos.write(s.toString().getBytes());
}
Log.d("WRITESTATUS","Success");
}

现在我想与其他应用程序(whatsapp，电子邮件等(共享此文件。为了实现这一点，我使用下面的代码来分享意图。我试图使用MODE_WORLD..有些东西不起作用，因为它已被弃用，所以我通过其他堆栈溢出问题了解到我们需要使用 FileProvider 来实现这一点，但这也没有用。

Intent sharingIntent = new Intent(Intent.ACTION_SEND);
sharingIntent.setType("*/*");
File file = getFileStreamPath(FILE_NAME);
Uri uri = FileProvider.getUriForFile(this,"com.example.writefile",file);
sharingIntent.putExtra(Intent.EXTRA_STREAM, uri);
sharingIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(Intent.createChooser(sharingIntent, "Share SENSOR Data"));

<provider
android:authorities="com.example.writefile"
android:name="androidx.core.content.FileProvider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_path"/>
</provider>

错误日志

2020-06-22 16:27:34.047 6578-6578/? E/ample.writefil: Unknown bits set in runtime_flags: 0x8000
2020-06-22 16:27:34.147 6578-6578/com.example.writefile E/libc: Access denied finding property "vendor.iop.enable_uxe"
2020-06-22 16:27:36.043 6578-6578/com.example.writefile E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.writefile, PID: 6578
java.lang.IllegalStateException: Could not execute method for android:onClick
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:402)
at android.view.View.performClick(View.java:7158)
at android.view.View.performClickInternal(View.java:7135)
at android.view.View.access$3500(View.java:801)
at android.view.View$PerformClick.run(View.java:27373)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:235)
at android.app.ActivityThread.main(ActivityThread.java:7441)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:397)
at android.view.View.performClick(View.java:7158) 
at android.view.View.performClickInternal(View.java:7135) 
at android.view.View.access$3500(View.java:801) 
at android.view.View$PerformClick.run(View.java:27373) 
at android.os.Handler.handleCallback(Handler.java:883) 
at android.os.Handler.dispatchMessage(Handler.java:100) 
at android.os.Looper.loop(Looper.java:235) 
at android.app.ActivityThread.main(ActivityThread.java:7441) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935) 
Caused by: java.lang.IllegalArgumentException: Failed to find configured root that contains /data/data/com.example.writefile/files/sensor.csv
at androidx.core.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:744)
at androidx.core.content.FileProvider.getUriForFile(FileProvider.java:418)
at com.example.writefile.MainActivity.Clicked(MainActivity.java:266)
at java.lang.reflect.Method.invoke(Native Method) 
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:397) 
at android.view.View.performClick(View.java:7158) 
at android.view.View.performClickInternal(View.java:7135) 
at android.view.View.access$3500(View.java:801) 
at android.view.View$PerformClick.run(View.java:27373) 
at android.os.Handler.handleCallback(Handler.java:883) 
at android.os.Handler.dispatchMessage(Handler.java:100) 
at android.os.Looper.loop(Looper.java:235) 
at android.app.ActivityThread.main(ActivityThread.java:7441) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935) 

Answer 1

更改此设置，它将起作用-我从这里获得了提示并尝试了不同的配置，并且此方法有效，我不知道为什么。

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<files-path
name="sensor"
path="."/>
</paths>