Question

我正在创建一个应用程序，显示Android设备的已安装权限的详细信息。目前，我正在显示带有所述权限图标的AlertDialog，但我还想根据用户的请求发送通知。我的代码是：

Drawable icon;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    String permission = getArguments().getString("permission");
    String label = "";
    String description = "";
    icon = null;
    try {
        label = getActivity().getPackageManager().getPermissionInfo(permission, PackageManager.GET_META_DATA).loadLabel(getActivity().getPackageManager()).toString();
        description = getActivity().getPackageManager().getPermissionInfo(permission, PackageManager.GET_META_DATA).loadDescription(getActivity().getPackageManager()).toString();
        icon = getActivity().getPackageManager().getPermissionInfo(permission, PackageManager.GET_META_DATA).loadIcon(getActivity().getPackageManager());
    } catch (Exception ignored) {}
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
            .setTitle("Permission")
            .setMessage("Permission: " + getArguments().getString("permission") + Character.toString((char) 10) + "Label: " + label + Character.toString((char) 10) + "Description: " + description)
            .setPositiveButton("Dismiss", null)
            .setCancelable(false);
    if (icon != null) {
        builder.setIcon(icon);
    }
    final AlertDialog alertDialog = builder.create();
    alertDialog.setCanceledOnTouchOutside(false);
    alertDialog.setOnShowListener(new DialogInterface.OnShowListener() {
        @Override
        public void onShow(DialogInterface dialog) {
            // Show notification here
        }
    });
    return alertDialog;
}

但是，v4 NotificationCompat.Builder不能将Drawable仅作为int，所以我该怎么办？

Answer 1

您可以像这样获取图标资源ID（假设permission是您在问题中也使用的字符串）：

final PackageManager pm = context.getPackageManager();
PermissionInfo info = pm.getPermissionInfo(permission, PackageManager.GET_META_DATA);
int iconResourceId = info.icon;

然后......

NotificationCompat.Builder builder = new NotificationCompat.Builder(getApplicationContext());
builder.setSmallIcon(iconResourceId);

Answer 2

R.drawable是一个整数，因此是R.color或R.string或R.layout

无论如何在Android中将Drawable转换为int

2 个答案: