使用Toast为什么报错java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/

Question

安卓开发使用Toast为什么会报错java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;  但是在别的的地方使用有都没问题，唯独在我添加注释的if里使用报错。
这里使用了Bmob的save方法添加数据。而且报错日志显示的位置还不是在这个Toast这一行，而是在上一个activity的初始化布局的
setContentView方法的那一行。有哪位大神知道问题所在，麻烦帮帮忙，江湖救急啊    case R.id.faBu_anLiu:
               ThreadPools.getInstance(FaBuActivity.this).execute(new Runnable() {
                   @Override
                   public void run() {
                       leiRong=miaoShu.getText().toString();
                       phoneNumber=number.getText().toString();
                           if(i==1){
                               System.out.println("36");
                               //Toast.makeText(FaBuActivity.this,"36",Toast.LENGTH_LONG).show();
                           }else {
                           Informatica informatica = new Informatica();
                           informatica.setLeiBie(leiBie);
                           informatica.setXuanXiang(xuanXiang);
                           informatica.setLieRong(leiRong);
                           informatica.setPhoneNumber(phoneNumber);
                           informatica.save(new SaveListener<String>() {
                               @Override
                               public void done(String s, BmobException e) {
                                   if (e == null) {
                                       Toast.makeText(FaBuActivity.this, "发布成功", Toast.LENGTH_LONG).show();
                                   } else {
                                       Toast.makeText(FaBuActivity.this, "发布失败", Toast.LENGTH_LONG).show();
                                   }
                               }
                           });
                       }
                   }
               });
                  break;

Answer 1

在子线程里面使用Toast需要自己创建一个 Looper 吧new Thread(new Runnable() {
    @Override
    public void run() {
        Looper.prepare();
        Toast.makeText(TwoActivity.this, "子线程显示", Toast.LENGTH_SHORT).show();
        Looper.loop();
    }
}).start();

Answer 2

把你toast加在这个中间试试
Looper.prepare();  
                     Toast.makeText(FaBuActivity.this, "发布成功", Toast.LENGTH_LONG).show();
                        Looper.loop();  
Looper.prepare();  
                   Toast.makeText(FaBuActivity.this, "发布失败", Toast.LENGTH_LONG).show();
                        Looper.loop();  

Answer 3

谢谢，确定是这个问题，加上looper就可以了

Answer 4

谢谢，确实是这个问题，加上Looper就可以了