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Ich habe mich gefragt, warum meine Ausgabe auf meiner Taschenrechner App mir diese Nachricht gibt?Rectangle Calculator App
Es ist wahrscheinlich etwas einfach, dass ich scheine immer über aussehen. Ich dachte, es könnte die Ausgabe sein, die die falschen EditTexts hat oder Dinge parst, die ich nicht brauche. Neben der Beschränkung auf zwei Dezimalstellen kann ich eine Lösung finden, aber ich dachte, ich würde trotzdem fragen. Irgendwelche Hinweise würden geschätzt werden, immer noch ziemlich neu in der Android-Programmierung.
package com.filej.calculatorapp;
import android.support.v4.media.MediaBrowserServiceCompat;
import android.support.v7.app.AppCompatActivity;
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 CalculatorApp extends AppCompatActivity` {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_calculator_app);
EditText heightEdit = (EditText) findViewById(R.id.heightEdit);
EditText widthEdit = (EditText) findViewById(R.id.widthEdit);
TextView area = (TextView) findViewById(R.id.areaTextView);
TextView perimeter = (TextView) findViewById(R.id.perimeterTextView);
Button calculate = (Button) findViewById(R.id.calculateButton);
View view = findViewById(R.id.calculateButton);
view.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
EditText height = (EditText) findViewById(R.id.heightEdit);
EditText width = (EditText) findViewById(R.id.widthEdit);
calculateArea(height.getText().toString(), width.getText().toString());
calculatePerimeter(height.getText().toString(), width.getText().toString());
}
});
}
private void calculateArea(String cHeight, String cWidth)
{
TextView area = (TextView) findViewById(R.id.areaTextView);
int area1 = Integer.parseInt(Height)* Integer.parseInt(Width);
area.setText(String.valueOf(area));
}
private void calculatePerimeter (String dHeight, String dWidth)
{
TextView perimeter = (TextView) findViewById(R.id.perimeterTextView);
int perimeter1 = (Integer.parseInt(Height) * 2) + (Integer.parseInt(Width) * 2);
perimeter.setText(String.valueOf(perimeter));
}
}
Das ist mein XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_calculator_app"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.filej.calculatorapp.CalculatorApp">
<TextView
android:text="Width"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="33dp"
android:id="@+id/textView2" />
<TextView
android:text="Height"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:id="@+id/textView"
android:layout_below="@+id/textView2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:text="Area"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="81dp"
android:id="@+id/textView3"
android:layout_below="@+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="41dp"
android:id="@+id/textView4"
android:layout_below="@+id/textView3"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:text="Perimeter" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="number|numberDecimal"
android:ems="10"
android:id="@+id/widthEdit"
android:layout_alignBaseline="@+id/textView2"
android:layout_alignBottom="@+id/textView2"
android:layout_centerHorizontal="true"
android:singleLine="false"
android:text="Enter Width" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="number|numberDecimal"
android:ems="10"
android:id="@+id/heightEdit"
android:text="Enter Height"
android:layout_alignBaseline="@+id/textView"
android:layout_alignBottom="@+id/textView"
android:layout_alignLeft="@+id/widthEdit"
android:layout_alignStart="@+id/widthEdit" />
<TextView
android:text="Total Area"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/textView3"
android:layout_alignLeft="@+id/heightEdit"
android:layout_alignStart="@+id/heightEdit"
android:id="@+id/areaTextView"
android:layout_alignRight="@+id/heightEdit"
android:layout_alignEnd="@+id/heightEdit" />
<TextView
android:text="Total Perimeter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/perimeterTextView"
android:layout_alignBaseline="@+id/textView4"
android:layout_alignBottom="@+id/textView4"
android:layout_alignLeft="@+id/areaTextView"
android:layout_alignStart="@+id/areaTextView"
android:layout_alignRight="@+id/areaTextView"
android:layout_alignEnd="@+id/areaTextView" />
<Button
android:text="Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView4"
android:layout_toRightOf="@+id/textView2"
android:layout_toEndOf="@+id/textView2"
android:layout_marginTop="52dp"
android:id="@+id/calculateButton" />
</RelativeLayout>
Versuchen genauer zu sein, was Sie wollen so viel –