React Native:位置权限被用户拒绝后Android应用崩溃
问题描述:
我在Android 23+上遇到React Native Permissions问题。 如果用户拒绝位置权限,那么我的应用会在此之后立即崩溃。React Native:位置权限被用户拒绝后Android应用崩溃
这里是我的代码:https://gist.github.com/alexHlebnikov/2d746d9b21dd1d964706ca3cc76f9a75
它运作良好,直到用户位置的权限对话框水龙头“拒绝”,然后应用程序崩溃。
在我的AndroidManifest.xml我有这行:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
我使用:
"react": "^16.0.0-alpha.6",
"react-native": "^0.43.4",
compileSdkVersion 26
buildToolsVersion '26.0.1'
minSdkVersion 18
targetSdkVersion 26
有什么办法解决这一问题?
答
下面是一些代码来管理权限,我希望你知道你需要使用Android清单来定义清单
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
//.... write file into storage ...
//System.out.println("SDK > BuildVersion TRUE");
} else {
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 666); // Comment 26
//System.out.println("go to requestPermissions");
}
}
您使用
首先检查权限的权限,然后管理如何最终用户与权限进行交互
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case 666: // Allowed was selected so Permission granted
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Snackbar s = Snackbar.make(findViewById(android.R.id.content),"Permission Granted",Snackbar.LENGTH_LONG);
View snackbarView = s.getView();
TextView textView = (TextView) snackbarView.findViewById(android.support.design.R.id.snackbar_text);
textView.setTextColor(Color.RED);
textView.setTextSize(18);
textView.setMaxLines(6);
s.show();
// do your work here
} else if (Build.VERSION.SDK_INT >= 23 && !shouldShowRequestPermissionRationale(permissions[0])) {
// User selected the Never Ask Again Option Change settings in app settings manually
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this, R.style.MyAlertDialogStyle);
alertDialogBuilder.setTitle("Change Permissions in Settings");
alertDialogBuilder
.setMessage("Click SETTINGS to Manually Set\n\n"+"Permissions to use Database Storage")
.setCancelable(false)
.setPositiveButton("SETTINGS", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
Uri uri = Uri.fromParts("package", getPackageName(), null);
intent.setData(uri);
startActivityForResult(intent, 1000); // Comment 3.
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
} else {
// User selected Deny Dialog to EXIT App ==> OR <== RETRY to have a second chance to Allow Permissions
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this, R.style.MyAlertDialogStyle);
alertDialogBuilder.setTitle("Second Chance");
alertDialogBuilder
.setMessage("Click RETRY to Set Permissions to Allow\n\n"+"Click EXIT to the Close App")
.setCancelable(false)
.setPositiveButton("RETRY", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, Integer.parseInt(WRITE_EXTERNAL_STORAGE));
Intent i = new Intent(MainActivity.this,MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
}
})
.setNegativeButton("EXIT", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
dialog.cancel();
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
}
break;
}};
请求运行时权限https://developer.android.com/training/permissions/requesting.html –
Y你可以参考[这个问题](https://*.com/questions/40955070/access-fine-location-not-working) –