Question

我有if else语句的代码

@Override
        public void onClick(View arg0) {
            int aInt = Integer.parseInt(textView1.getText().toString());
             if(aInt <= 0) {
                 Toast.makeText(getApplicationContext(), "Wrong",
                            Toast.LENGTH_SHORT).show();
                } else{

                 int a=Integer.parseInt(textView1.getText().toString());
                     int  b=a-2;
                  String s1 = String.valueOf(b);
                 textView1.setText(s1);
                 Toast.makeText(getApplicationContext(), "Wrong",
                            Toast.LENGTH_SHORT).show();
                int c =Integer.parseInt(textView5.getText().toString());
                        int d = c-1;
                        String s2 = String.valueOf(d);
                        textView5.setText(s2);

                }  if(textView5 != null) {
                    int dInt = Integer.parseInt(textView5.getText().toString());
                        if(dInt <= 0);
                     Toast.makeText(getApplicationContext(), "Game Over",
                                Toast.LENGTH_SHORT).show();
                            Intent intent = new Intent();
                        intent.setClass(MainActivity.this, Fifth.class);
                        startActivity(intent);

                    SavePreferences("MEM1", textView1.getText().toString());
                }
        }

};

在代码的这一部分，如果textView5的值为0，我想启动intent 但它仍然符合新的意图，即使textView5的价值还不是0我不知道我的代码的哪一部分是错的：

}  if(textView5 != null) {
                int dInt = Integer.parseInt(textView5.getText().toString());
                    if(dInt <= 0);
                 Toast.makeText(getApplicationContext(), "Game Over",
                            Toast.LENGTH_SHORT).show();
                        Intent intent = new Intent();
                    intent.setClass(MainActivity.this, Fifth.class);
                    startActivity(intent);
 }

Answer 1

if(textView5 != null)
{
      int dInt = Integer.parseInt(textView5.getText().toString());
      if(dInt <= 0)
                {
                     Toast.makeText(getApplicationContext(), "Game Over",Toast.LENGTH_SHORT).show();
                    startActivity(new Intent(MainActivity.this, Fifth.class));
                }
     }

Answer 2

这样做：

}  if(textView5 != null) {
            int dInt = Integer.parseInt(textView5.getText().toString());
                if(dInt <= 0) {
             Toast.makeText(getApplicationContext(), "Game Over",
                        Toast.LENGTH_SHORT).show();
                    Intent intent = new Intent();
                intent.setClass(MainActivity.this, Fifth.class);
                startActivity(intent);
              }
}

Answer 3

语句（textView5！= null）检查视图是否为空。您需要添加编辑代码，如。

                   if(!textView5.getText().toString().equals("")) {
            int dInt = Integer.parseInt(textView5.getText().toString());
                if(dInt <= 0);
             Toast.makeText(getApplicationContext(), "Game Over",
                        Toast.LENGTH_SHORT).show();
                    Intent intent = new Intent();
                intent.setClass(MainActivity.this, Fifth.class);
                startActivity(intent);
                }

Answer 4

试试这个：if循环没有像这样的半冒号

  if(dInt <= 0){
         Toast.makeText(getApplicationContext(), "Game Over",
                    Toast.LENGTH_SHORT).show();
                Intent intent = new Intent();
            intent.setClass(MainActivity.this, Fifth.class);
            startActivity(intent);
            }

Answer 5

;是String的结尾。如果你在If条件结束时给;，那么正文就不会执行..

所以删除它并检查你的代码..

if(dInt <= 0)
   Toast.makeText(getApplicationContext(), "Game Over",Toast.LENGTH_SHORT).show();
   Intent intent = new Intent();
   ......

IF if语句功能

5 个答案: