Detailed explanation of Android permission query example

<!-- Declare all required permissions（Including ordinary permissions and dangerous permissions） -->
<uses-permission android:name=".READ_EXTERNAL_STORAGE" />
<uses-permission android:name=".WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name=".READ_CONTACTS"/>

private static final int MY_PERMISSION_REQUEST_CODE = 10000;

//Step 1: Check whether there are corresponding permissions,boolean isAllGranted = checkPermissionAllGranted(
    new String[] {
        //Add to add corresponding permissions according to your needs        .READ_EXTERNAL_STORAGE,
        .WRITE_EXTERNAL_STORAGE
    }
);
// If all permissions are owned, the log file will be initialized directlyif (isAllGranted) {
    ();//What to do after you have permission    return;
}

//Step 2: Request permission// Request multiple permissions at once, and if other permissions are granted, they will be automatically ignored(
    this,
    new String[] {
        .READ_EXTERNAL_STORAGE,
        .WRITE_EXTERNAL_STORAGE
    },
    MY_PERMISSION_REQUEST_CODE
);

//Check whether you have all the permissions specifiedprivate boolean checkPermissionAllGranted(String[] permissions) {
    for (String permission : permissions) {
        if ((this, permission) != PackageManager.PERMISSION_GRANTED) {
            // As long as there is a permission not granted, it will directly return false            return false;
        }
    }
    return true;
}


//Step 3: Return to process the application permission result@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    (requestCode, permissions, grantResults);

    if (requestCode == MY_PERMISSION_REQUEST_CODE) {
        boolean isAllGranted = true;

        // Determine whether all permissions have been granted        for (int grant : grantResults) {
            if (grant != PackageManager.PERMISSION_GRANTED) {
                isAllGranted = false;
                break;
            }
        }

        if (isAllGranted) {
            // If all permissions are granted, the log file is initialized            ();//What to do after you have permission
        } else {
            // A dialog box pops up to tell the user why permissions are needed, and guides the user to manually open the permission button in the application permission management            openAppDetails();
        }
    }
}
//Open the details settings of the APPprivate void openAppDetails() {
     builder = new (this);
    ("This program needs to access "External Memory", please go to "Application Information -> Permissions" to grant it!");
    ("Go to manual authorization", new () {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Intent intent = new Intent();
            (Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
            (Intent.CATEGORY_DEFAULT);
            (("package:" + getPackageName()));
            (Intent.FLAG_ACTIVITY_NEW_TASK);
            (Intent.FLAG_ACTIVITY_NO_HISTORY);
            (Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
            startActivity(intent);
        }
    });
    ("Cancel", null);
    ();
}