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嗨,所有我有Android應用程序,這是計算器只執行一個操作(另外)結果總是3.0無論這兩個數字是 什麼是解決方案? 這裏是代碼android計算器應用程序錯誤
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class claculator extends Activity {
/** Called when the activity is first created. */
EditText nu1,nu2;
Button add;
TextView txtv;
double x,y,z;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
nu1=(EditText)findViewById(R.id.n1);
nu2=(EditText)findViewById(R.id.n2);
add=(Button)findViewById(R.id.btn);
txtv=(TextView)findViewById(R.id.tv);
x= Double.parseDouble(nu1.getText().toString());
y= Double.parseDouble(nu2.getText().toString());
add.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
z=x+y;
txtv.setText(String.valueOf(z));
}
});
}
}