android - 运行时权限异常

Question

为询问权限而编写的方法。我正在请求多个权限。

private void askForPermissions() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            int contactsPermission = checkSelfPermission(Manifest.permission.READ_CONTACTS);
            int extStoragePermission = checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE);
            int cameraPermission = checkSelfPermission(Manifest.permission.CAMERA);
            int recordPermission = checkSelfPermission(Manifest.permission.RECORD_AUDIO);
            int internetPermission = checkSelfPermission(Manifest.permission.INTERNET);

            Log.e("Start_Permission1",""+(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M));
            Log.e("Start_Permission2",""+(contactsPermission != PackageManager.PERMISSION_GRANTED));
            Log.e("Start_Permission3",""+(extStoragePermission != PackageManager.PERMISSION_GRANTED));
            Log.e("Start_Permission4",""+(cameraPermission != PackageManager.PERMISSION_GRANTED));
            Log.e("Start_Permission5",""+(recordPermission != PackageManager.PERMISSION_GRANTED));
            Log.e("Start_Permission6",""+(internetPermission != PackageManager.PERMISSION_GRANTED));


            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && contactsPermission != PackageManager.PERMISSION_GRANTED && extStoragePermission != PackageManager.PERMISSION_GRANTED && cameraPermission != PackageManager.PERMISSION_GRANTED && recordPermission != PackageManager.PERMISSION_GRANTED) {
                Log.e("Start","here i am");
                requestPermissions(new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE,
                        Manifest.permission.RECORD_AUDIO, Manifest.permission.READ_CONTACTS}, REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);

            }
            Log.e("Start_permission","Asking done..");
}
In onCreate method:

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_start);

    // First take all permissions
        askForPermissions();

        if (!checkNetworkAvailability()) {
            Toast.makeText(getApplicationContext(), "Sorry! You need Internet Connection", Toast.LENGTH_LONG).show();
            spinner.setVisibility(View.INVISIBLE);

        } else {

            if (populateUserData()) {
                spinner = (ProgressBar) findViewById(R.id.spinner);
                spinner.setVisibility(ProgressBar.VISIBLE);
                Log.e("Start_populateUSrData", "User data populated");

                fetchContacts();
    }

@Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions,
                                           int[] grantResults) {
        switch (requestCode) {
            case REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS:
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // Permission Granted
                    //insertDummyContact();
                } else {
                    // Permission Denied
                    Toast.makeText(Start.this, "WRITE_CONTACTS Denied", Toast.LENGTH_SHORT)
                            .show();
                }
                break;
            default:
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }

日志:

12-24 16:53:26.251 1465-1465/com.moodoff E/Minikin: addFont failed to create font /system/fonts/NanumGothic.ttf
12-24 16:53:26.252 1465-1465/com.moodoff E/Minikin: addFont failed to create font /system/fonts/DroidSansFallback.ttf
12-24 16:53:26.252 1465-1465/com.moodoff E/Minikin: addFont failed to create font /system/fonts/MTLmr3m.ttf
12-24 16:53:26.434 1465-1465/com.moodoff E/MultiWindowProxy: getServiceInstance failed!
12-24 16:53:26.595 1465-1465/com.moodoff E/Start_Permission1: true
12-24 16:53:26.595 1465-1465/com.moodoff E/Start_Permission2: true
12-24 16:53:26.595 1465-1465/com.moodoff E/Start_Permission3: true
12-24 16:53:26.595 1465-1465/com.moodoff E/Start_Permission4: true
12-24 16:53:26.595 1465-1465/com.moodoff E/Start_Permission5: true
12-24 16:53:26.596 1465-1465/com.moodoff E/Start_Permission6: false
12-24 16:53:26.596 1465-1465/com.moodoff E/Start: here i am
12-24 16:53:26.618 1465-1465/com.moodoff E/Start_permission: Asking done..
12-24 16:53:26.876 1465-1572/com.moodoff E/AndroidRuntime: FATAL EXCEPTION: Thread-1132
                                                           Process: com.moodoff, PID: 1465
                                                           java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{292d428 1465:com.moodoff/u0a207} (pid=1465, uid=10207) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS
                                                               at android.os.Parcel.readException(Parcel.java:1599)
                                                               at android.os.Parcel.readException(Parcel.java:1552)
                                                               at android.app.ActivityManagerProxy.getContentProvider(ActivityManagerNative.java:3847)
                                                               at android.app.ActivityThread.acquireProvider(ActivityThread.java:5062)
                                                               at android.app.ContextImpl$ApplicationContentResolver.acquireUnstableProvider(ContextImpl.java:2026)
                                                               at android.content.ContentResolver.acquireUnstableProvider(ContentResolver.java:1517)
                                                               at android.content.ContentResolver.query(ContentResolver.java:482)
                                                               at android.content.ContentResolver.query(ContentResolver.java:441)
                                                               at com.moodoff.ContactList.getContactNames(ContactList.java:135)
                                                               at com.moodoff.helper.DBHelper$1.run(DBHelper.java:73)
                                                               at java.lang.Thread.run(Thread.java:818)

尽管我在开始时添加了 askForPermission，但它正在读取联系人并抛出此权限拒绝错误...没有联系人读取行，应用程序正在正确请求权限并且工作正常。可以做什么？

Answer 1

这里没有最小的、完整的和可验证的示例。但是，在 onCreate() 中，如果 checkNetworkAvailability() 返回 true 并且 populateUserData() 返回 true ，您调用了 fetchContacts()，尽管您可能还没有权限。

与 Android 中的许多事情一样，requestPermissions() 是异步的。当您的 requestPermissions() 调用返回时，尚未向用户询问这些权限，而您还没有这些权限。如果您正在请求权限，则在 onRequestPermissionsResult() 之前，您不能根据该权限执行初始化，然后仅当用户授予权限时。