我的应用程序出现问题。要使用选项,我需要授予外部存储访问权限。我在那里找到了完美的代码:
public boolean isStoragePermissionGranted() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED) {
Log.v(TAG,"Permission is granted");
return true;
} else {
Log.v(TAG,"Permission is revoked");
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
return false;
}
}
else { //permission is automatically granted on sdk<23 upon installation
Log.v(TAG,"Permission is granted");
return true;
}
}
问题是,代码工作正常,但我不明白如果未授予访问权限,如何阻止我自己的代码继续(或等待用户单击“允许”,然后再继续我的代码)。
我的代码:
isStoragePermissionGranted();
File outputFile = new File("");
InputStream is = getResources().openRawResource(((Sound) adapter.getItem(index)).getMpsound());
try {
byte[] buffer = new byte[is.available()];
is.read(buffer);
File outputDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
outputFile = new File(outputDir, getResources().getResourceEntryName(((Sound) adapter.getItem(index)).getMpsound()) + ".mp3");
OutputStream os = new FileOutputStream(outputFile);
os.write(buffer);
} catch (IOException e) {
e.printStackTrace();
}
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("audio/*");
share.putExtra(Intent.EXTRA_STREAM, FileProvider.getUriForFile(this, BuildConfig.APPLICATION_ID + ".provider", outputFile));
share.putExtra(Intent.EXTRA_TEXT, "\"" + ((Sound) adapter.getItem(index)).getTitre_show() + "\" shared by my app !");
startActivity(Intent.createChooser(share, "Share Sound File"));
return true;
目前,一切都已执行,即使未授予访问权限,应用程序也会尝试共享文件。所以这是行不通的。如果我返回,则会弹出请求允许访问的窗口,等待答案。
我怎样才能做到这一点?
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