我在设备管理员接收器中创建对话时遇到问题。
错误:无法添加窗口 - 令牌null不适用于应用程序。
我只是想创建一个对话框来验证存储在我的首选项中的密码,如果匹配则可以禁用设备管理员复选框,否则它应该退出..
任何想法
public static class DeviceAdminSampleReceiver extends DeviceAdminReceiver {
void showToast(Context context, String msg) {
//String status = context.getString(R.string.admin_receiver_status, msg);
// Toast.makeText(context, status, Toast.LENGTH_SHORT).show();
}
@Override
public void onEnabled(Context context, Intent intent) {
Toast.makeText(context, "Enabled", Toast.LENGTH_SHORT).show();
}
@Override
public void onDisabled(Context context, Intent intent) {
showMyDialog(context);
Toast.makeText(context, "Disabled", Toast.LENGTH_SHORT).show();
}
public void showMyDialog(final Context context){
AlertDialog dialog = null;
SharedPreferences prefs= context.getSharedPreferences("MainPrefs", 0);
final String tempPass = prefs.getString("password", "");
LayoutInflater factory = LayoutInflater.from(context);
final View deviceDialog = factory.inflate(R.layout.device_receiver_layout, null);
final EditText input = (EditText) deviceDialog.findViewById(R.id.dialog_editText);
Button done = (Button) deviceDialog.findViewById(R.id.button2);
Button cancel = (Button) deviceDialog.findViewById(R.id.button1);
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setView(deviceDialog);
builder.setCancelable(false);
builder.setTitle("Ultimate SMS Password");
//builder.show();
dialog = builder.create();
dialog.show();
done.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(tempPass.regionMatches(0, input.getText().toString(), 0, tempPass.length()))
{
Toast.makeText(context, "Matches", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(context, "Not Matches", Toast.LENGTH_SHORT).show();
//finish();
}
}
});
cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Toast.makeText(context, "Exit.", Toast.LENGTH_SHORT).show();
}
});
}
答案 0 :(得分:0)
您无法在非活动上下文中显示对话框。但是,您可以设计一个透明的活动,使其看起来像对话框,并从设备管理中调用它,如下所示:
Intent intent = new Intent(context, YourActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
上面代码中声明的上下文是DeviceAdminReceiver
类中任何操作方法的属性。为了更好地理解检查以下内容:
@Override
public CharSequence onDisableRequested(Context context, Intent intent) {
Intent intentcl = new Intent(context, OperationActivity.class);
intentcl.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intentcl);
return super.onDisableRequested(context, intent);
}