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我以某种方式无法读取或写入文件。我正在使用以下来获取文件名。对大多数人来说,这可能是显而易见的,但我的Java有点弱。canRead()和canWrite()都返回false
private String fileName(int itemNum) {
final String DIR_PREFIX = "/MyDailySelfiesDir";
final String FILENAME_PREFIX = "/MyDailySelfieFile_";
File dir_0 = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
String dirName = dir_0.getAbsolutePath() + DIR_PREFIX;
File dir = new File(dirName);
dir.mkdirs();
String name = dirName + FILENAME_PREFIX + itemNum + ".jpg";
File temp = new File(name);
Log.i(TAG, name + " can read? " + temp.canRead() + " can write? " + temp.canWrite());
return name;
}
AndroidManifest.xml中看起来像这样,在部分:
<uses-sdk
android:minSdkVersion="18"
android:targetSdkVersion="19" />
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
我在Android Studio中,仿效Galaxy Nexus的5,18 API
修复程序是Chamatake-san。谢谢。 –