[英]Cannot get correct output in android
I have been trying to take three inputs based on what I will identify the type of triangle, ie Equivalent, Isosceles or Scalene but it doesn't just seem to work.我一直在尝试根据我将识别的三角形类型(即等效、等腰线或不等边线)进行三个输入,但它似乎并不起作用。 Kindly go easy on me as I am a newbie, help is appreciated in advance.
请对我放轻松,因为我是新手,提前感谢您的帮助。
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
public class TriangleActivity extends AppCompatActivity {
EditText et_x, et_y, et_z;
Button btnCheck;
TextView tvResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.triangle_activity);
et_x = (EditText) findViewById(R.id.et_x);
et_y = (EditText) findViewById(R.id.et_y);
et_z = (EditText) findViewById(R.id.et_z);
btnCheck = (Button) findViewById(R.id.btn_check);
// tvResult = (TextView) findViewById(R.id.tv_result);
}
public void checkResult(View view) {
//check if it's equivalent
if(et_x == et_y && et_y == et_z)
{
Toast.makeText(this, "Equivalent.", Toast.LENGTH_SHORT).show();
}
//check if it's Isosceles
else if (et_x == et_y || et_x == et_z || et_y == et_z)
{
Toast.makeText(this, "Isosceles.", Toast.LENGTH_SHORT).show();
}
//check if it's Scalene
else if (et_x != et_y && et_x != et_z && et_y != et_z)
{
Toast.makeText(this, "Scalene", Toast.LENGTH_SHORT).show();
}
//check if it's none
else
{
Toast.makeText(this, "Not a triangle.", Toast.LENGTH_SHORT).show();
}
}
}
And here is the xml file, can't figure out if the problem really lies here somehow or not.这是xml文件,无法弄清楚问题是否真的出在此处。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView9"
android:layout_width="wrap_content"
android:layout_height="42dp"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
android:text="Value of X"
android:textSize="20dp" />
<EditText
android:id="@+id/et_x"
android:layout_width="78dp"
android:layout_height="wrap_content"
android:layout_below="@+id/textView9"
android:layout_marginTop="58dp"
android:layout_marginLeft="10dp"
android:ems="10"
android:inputType="number" />
<TextView
android:id="@+id/textView10"
android:layout_width="100dp"
android:layout_height="45dp"
android:layout_marginStart="54dp"
android:layout_marginTop="10dp"
android:layout_toEndOf="@+id/textView9"
android:text="Value of Y"
android:textSize="20dp" />
<EditText
android:id="@+id/et_y"
android:layout_width="87dp"
android:layout_height="wrap_content"
android:layout_below="@+id/textView10"
android:layout_marginStart="79dp"
android:layout_marginTop="57dp"
android:layout_toEndOf="@+id/et_x"
android:ems="10"
android:inputType="number" />
<TextView
android:id="@+id/textView11"
android:layout_width="wrap_content"
android:layout_height="43dp"
android:layout_marginStart="55dp"
android:layout_marginTop="10dp"
android:layout_marginRight="10dp"
android:layout_toEndOf="@+id/textView10"
android:text="Value of Z"
android:textSize="20dp" />
<EditText
android:id="@+id/et_z"
android:layout_width="84dp"
android:layout_height="wrap_content"
android:layout_below="@+id/textView11"
android:layout_marginStart="62dp"
android:layout_marginRight="10dp"
android:layout_marginTop="59dp"
android:layout_toEndOf="@+id/et_y"
android:ems="10"
android:inputType="number" />
<Button
android:id="@+id/btn_check"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/et_y"
android:layout_alignEnd="@+id/et_y"
android:layout_marginTop="314dp"
android:layout_marginEnd="-1dp"
android:onClick="checkResult"
android:text="Check" />
<TextView
android:id="@+id/tv_result"
android:layout_width="175dp"
android:layout_height="41dp"
android:layout_below="@+id/btn_check"
android:layout_alignStart="@+id/btn_check"
android:layout_alignEnd="@+id/btn_check"
android:layout_marginStart="-45dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="-41dp"
android:hint="Result"
android:textSize="10dp" />
</RelativeLayout>
you dont compare the inuts of the EditText.你不比较 EditText 的输入。 you compare the object
你比较对象
public void checkResult(View view) {
//check if it's equivalent
if(et_x.getText() == et_y.getText() && et_y.getText() == et_z.getText())
{
Toast.makeText(this, "Equivalent.", Toast.LENGTH_SHORT).show();
}
//check if it's Isosceles
else if (et_x.getText()== et_y.getText() || et_x.getText() == et_z.getText() || et_y.getText() == et_z.getText())
{
Toast.makeText(this, "Isosceles.", Toast.LENGTH_SHORT).show();
}
//check if it's Scalene
else if (et_x.getText() != et_y.getText() && et_x.getText() != et_z.getText() && et_y.getText() != et_z.getText())
{
Toast.makeText(this, "Scalene", Toast.LENGTH_SHORT).show();
}
//check if it's none
else
{
Toast.makeText(this, "Not a triangle.", Toast.LENGTH_SHORT).show();
}
}
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