Question

我正在构建一个测验应用程序，我从用户那里获取两个文本输入并使用if else语句进行比较，但代码正在跳过＆＃34; if和if＆＃34;真正的部分，只有部分执行else。

 public void checkAnswer_condition_q2(View view) {


    EditText blank_one = (EditText)findViewById(R.id.fill_condition1);
    EditText blank_two = (EditText)findViewById(R.id.fill_condition2);

    if(btn_continue.getText() == "Continue"){
        Intent intent = new Intent(condition_q2.this, loops.class);
        startActivity(intent);
        this.finish();
    }

    if(blank_one.getText().toString() == "if" && blank_two.getText().toString() =="else"){
        Toast.makeText(this, "Correct", Toast.LENGTH_SHORT).show();
        btn_continue.setText("Continue");

    }
    else if(blank_one.getText().toString() != "if" ||  blank_two.getText().toString() !="else"){
        Toast.makeText(this, "Try Again", Toast.LENGTH_SHORT).show();
    }
}

Answer 1

使用equals比较字符串内容而非==，您也忘记在btn_continue中调用toString（）：

if(btn_continue.getText().toString().equals("Continue")){
        Intent intent = new Intent(condition_q2.this, loops.class);
        startActivity(intent);
        this.finish();
    }

    if(blank_one.getText().toString().equals("if") && blank_two.getText().toString().equals("else")){
        Toast.makeText(this, "Correct", Toast.LENGTH_SHORT).show();
        btn_continue.setText("Continue");

    }
    else if(!blank_one.getText().toString().equals("if") ||  !blank_two.getText().toString().equals("else")){
        Toast.makeText(this, "Try Again", Toast.LENGTH_SHORT).show();
    }

Android：if else语句不起作用

1 个答案: