我试图在外部存储器上创建一个文件，但是安卓在这样做时出现了错误。
我已经查看了许多在stackoverflow上提出的问题，但仍然无法找到问题所在。
我已经在清单文件中提供了权限。
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jewelmahal.jewellerapp">
<uses-feature android:name="android.hardware.camera" android:required="true" />
<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:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".login.LoginActivity"
android:label="@string/title_activity_login"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".signup.CompanyDetailsSignupActivity"
android:label="@string/title_activity_signup"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".signup.UploadTinActivity"
android:label="@string/upload_tin_title"
android:theme="@style/AppTheme.NoActionBar" />
</application>
</manifest>
AsyncTask
private class SaveImageToSD extends AsyncTask<Bitmap, Integer, String> {
private Bitmap tinImageBitmap;
protected void onPreExecute() {
//Nothing yet
}
protected String doInBackground(Bitmap... bitmaps) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
tinImageBitmap = bitmaps[0];
tinImageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String state = Environment.getExternalStorageState();
if (!Environment.MEDIA_MOUNTED.equals(state)) {
return null; //Cannot write to Strorage
}
Log.d("EXTERNAL_STORAGE", "AVAILABLE FOR READ/WRITE");
File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "JewelMahal");
Log.d("Can Write", Environment.getExternalStorageDirectory().canWrite() + "");
if (!file.mkdirs() && !file.isDirectory()) {
Log.d("LOG_TAG", "Directory not created");
}
else {
Log.d("LOG_TAG", "Directory created");
}
File destination = new File(file.getAbsolutePath() + File.separator + TIN_FILE_PREFIX + System.currentTimeMillis() + ".jpg");
Log.d("Location:", destination.getAbsolutePath());
FileOutputStream fo;
try {
destination.createNewFile();
fo = new FileOutputStream(destination);
fo.write(bytes.toByteArray());
fo.close();
} catch (FileNotFoundException e) {
Log.d("FileNotFound", "dsda");
e.printStackTrace();
} catch (IOException e) {
Log.d("IOException", "dsda");
e.printStackTrace();
}
return (tinImagePath=destination.getAbsolutePath());
}
protected void onProgressUpdate(Integer... progress) {
}
protected void onPostExecute(String tinPath) {
tinPreview.setImageBitmap(tinImageBitmap);
}
}
错误
02-10 09:14:52.206 29864-32486/? W/System.err: java.io.IOException: open failed: ENOENT (No such file or directory)
02-10 09:14:52.215 29864-32486/? W/System.err: at java.io.File.createNewFile(File.java:939)
02-10 09:14:52.216 29864-32486/? W/System.err: at com.jewelmahal.jewellerapp.signup.UploadTinActivity$SaveImageToSD.doInBackground(UploadTinActivity.java:65)
02-10 09:14:52.216 29864-32486/? W/System.err: at com.jewelmahal.jewellerapp.signup.UploadTinActivity$SaveImageToSD.doInBackground(UploadTinActivity.java:33)
02-10 09:14:52.216 29864-32486/? W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:295)
02-10 09:14:52.216 29864-32486/? W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
02-10 09:14:52.216 29864-32486/? W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
02-10 09:14:52.216 29864-32486/? W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
02-10 09:14:52.216 29864-32486/? W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
02-10 09:14:52.216 29864-32486/? W/System.err: at java.lang.Thread.run(Thread.java:818)
02-10 09:14:52.217 29864-32486/? W/System.err: Caused by: android.system.ErrnoException: open failed: ENOENT (No such file or directory)
02-10 09:14:52.220 29864-32486/? W/System.err: at libcore.io.Posix.open(Native Method)
02-10 09:14:52.220 29864-32486/? W/System.err: at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
02-10 09:14:52.220 29864-32486/? W/System.err: at java.io.File.createNewFile(File.java:932)
02-10 09:14:52.220 29864-32486/? W/System.err: ... 8 more