Permission

android6 API23之前，应用的一系列授权都在安装的时候。

23之后允许在 安装之后打开app才请求权限。

检查 Permission

// called in a standard activity, use  ContextCompat.checkSelfPermission for AppCompActivity

int permissionCheck = checkSelfPermission(this, Manifest.permission.WRITE_CALENDAR);  //检查permission.WRITE_CALENDAR 许可信息。
if (!permissionCheck == PackageManager.PERMISSION_GRANTED) {
  // User may have declined earlier, ask Android if we should show him a reason
    if (shouldShowRequestPermissionRationale(thisActivity, Manifest.permission.WRITE_CALENDAR)) {
        // show an explanation to the user
        // Good practise: don't block thread after the user sees the explanation, try again to request the permission.
    } else {
        // request the permission.
        // CALLBACK_NUMBER is a integer constants
        requestPermissions(thisActivity,  new String[]{Manifest.permission.WRITE_CALENDAR}, CALLBACK_NUMBER);
        // The callback method gets the result of the request.
    }
} else {
// got permission use it
}

 

用户授予权限后  回调：

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_READ_CONTACTS: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // permission was granted, do your work....
            } else {
                // permission denied
                // Disable the functionality that depends on this permission.
            }
            return;
        }

        // other 'case' statements for other permssions
    }
}