Java 将EditText乘以特定值-Android Studio
我必须在Android Studio中创建一个停车场计算器,它将分钟数乘以3美分。它必须包含1个编辑文本、文本视图和按钮Java 将EditText乘以特定值-Android Studio,java,android,android-edittext,calculator,Java,Android,Android Edittext,Calculator,我必须在Android Studio中创建一个停车场计算器,它将分钟数乘以3美分。它必须包含1个编辑文本、文本视图和按钮 public class MainActivity extends AppCompatActivity { private Button b; private EditText cells; private TextView ans; String s = "Answer"; double c = 0; @Override
public class MainActivity extends AppCompatActivity {
private Button b;
private EditText cells;
private TextView ans;
String s = "Answer";
double c = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b = (Button) findViewById(R.id.button);
cells = (EditText) findViewById(R.id.editText_cells);
ans = (TextView) findViewById(R.id.textView3);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
c = Double.parseDouble(cels.getText().toString());
s = Double.toString(c+((c*3)/100));
char ch[] = s.toCharArray();
ans.setText(ch, 0, ch.length)
}
});
}
我希望您能够管理main.xml。欢迎使用SO。我试过几种方法,但都不管用。能给我们解释一下方法吗?并与您的方法共享一些代码?