这是我在类似情况下所做的：
第 1 步：向清单文件添加权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
第二步：创建权限检查函数
void checkForPermissions()
{
// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
// Permission is not granted
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
// This part I didn't implement,because for my case it isn't needed
Log.i(TAG,"Unexpected flow");
} else {
// No explanation needed; request the permission
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
MY_PERMISSIONS_REQUEST_EXTERNAL_STORAGE);
// MY_PERMISSIONS_REQUEST_EXTERNAL_STORAGE is an
// app-defined int constant. The callback method gets the
// result of the request.
}
} else {
// Permission is already granted, call the function that does what you need
onFileWritePermissionGranted();
}
}
第 3 步：实现 onRequestPermissionsResult
@Override
public void onRequestPermissionsResult(int requestCode,
String[] permissions, int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_EXTERNAL_STORAGE: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay!
// call the function that does what you need
onFileWritePermissionGranted();
} else {
Log.e(TAG, "Write permissions has to be granted tp ATMS, otherwise it cannot operate properly.\n Exiting the program...\n");
}
return;
}
// other 'case' lines to check for other
// permissions this app might request.
}
}
第四步：使用权限:)
void onFileWritePermissionGranted()
{
// Write to some file
}