如何验证特定密码的密码字段?

时间:2017-07-12 17:48:42

标签: android

如何验证特定密码的密码字段,例如coolhack,如Android中的情​​况?

以下是代码:

public class MainActivity extends AppCompatActivity {
    Button buttn;
    EditText passwrd;
    String str, str1 = "coolhack";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        passwrd = (EditText) findViewById(R.id.password);
        str = passwrd.getText().toString();
        buttn = (Button) findViewById(R.id.button1);
        buttn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                validate();
            }
        });
    }

    private void validate() {
        if(str.equals(str1)) {
            Intent i = new Intent(MainActivity.this, Main2Activity.class);
            startActivity(i);
        } else {
            Toast.makeText(MainActivity.this, "INVALID PASSWORD", Toast.LENGTH_SHORT).show();
        }
    }
}

2 个答案:

答案 0 :(得分:1)

你需要移动

str = passwrd.getText().toString();

在onClick(或验证方法)

目前,在加载Activity时,您会立即获得一个空字符串。

您希望进行反应

答案 1 :(得分:0)

public class MainActivity extends AppCompatActivity {
    Button buttn;
    EditText passwrd;
    String str, str1 = "coolhack";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        passwrd = (EditText) findViewById(R.id.password);
        buttn = (Button) findViewById(R.id.button1);
        buttn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                str = passwrd.getText().toString().trim();
                validate();
            }
        });
    }

    private void validate() {
        if(str.equals(str1)) {
            Intent i = new Intent(MainActivity.this, Main2Activity.class);
            startActivity(i);
        } else {
            Toast.makeText(MainActivity.this, "INVALID PASSWORD", Toast.LENGTH_SHORT).show();
        }
    }
}

点击按钮时从edittext获取字符串。