java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText

Question

I'm getting the following Error:

java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText at com.example.bmicalculator.MainActivity.initializeApp(MainActivity.java.32)

Main Activity:

public class MainActivity extends Activity {

private EditText heightIn;
private EditText weightIn;
private Button CalculateButton;
private double weight =0;
private double height =0;
private TextView BmiResult;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initializeApp();
    }

    private void initializeApp() {
        heightIn = (EditText) findViewById (R.id.HeightInput1);
        weightIn = (EditText) findViewById (R.id.WeightInput1);
        CalculateButton = (Button) findViewById (R.id.CalculateButton);
        BmiResult = (TextView) findViewById (R.id.BmiResult);

    }

    public void calculateBMI(View v) {
        weight = Double.parseDouble(weightIn.getText().toString());
        height = Double.parseDouble(heightIn.getText().toString());
        double bmi = (weight / (height * height));
        String result = String.format("%.2f", bmi);
        Log.d("MyActivity", result);
        BmiResult.setText(result, TextView.BufferType.NORMAL);
    }
}

XML File:

<LinearLayout xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
tools:context="${relativePackage}.${activityClass}" >

<TextView
    android:id="@+id/HeightInput1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/HeightInput"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText
    android:id="@+id/editText1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="@string/InchesHint"
    android:inputType="numberDecimal" >

    <requestFocus />
</EditText>

<TextView
    android:id="@+id/WeightInput1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/WeightInput"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText
    android:id="@+id/editText2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="@string/PoundsHint"
    android:inputType="numberDecimal" />

<Button
    android:id="@+id/CalculateButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:onClick="calculateBMI"
    android:text="@string/CalculateButton" />

<TextView
    android:id="@+id/BmiResult"
    android:layout_width="100dp"
    android:layout_height="0dp"
    android:layout_weight="0.00"
    android:text="@string/BmiResult" />

Thank you so much, that stopped the program from crashing. Would you have any idea why my calculation is not working though? — jane
– jane, Commented Oct 30, 2014 at 11:51
You have to implement ButtonClickListener to perform your operation when u click on 'CalculateButton' — Top Cat
– Top Cat, Commented Oct 30, 2014 at 11:54
CalculateButton = (Button) findViewById (R.id.CalculateButton); CalculateButton.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v) { calculateBMI(); } }); } public void calculateBMI() { weight = Double.parseDouble(weightIn.getText().toString()); height = Double.parseDouble(heightIn.getText().toString()); double bmi = (weight / (height * height)); String result = String.format("%.2f", bmi); Log.d("MyActivity", result); BmiResult.setText(result, TextView.BufferType.NORMAL); — jane
– jane, Commented Oct 30, 2014 at 12:29

M D · Accepted Answer · 2014-10-30 11:56:45Z

4

Your heightIn is not EditText and you're trying to cast it as EditText so you got Error

java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText at com.example.bmicalculator.MainActivity.initializeApp(MainActivity.java.32)

so do as,

heightIn = (TextView) findViewById (R.id.HeightInput1);
weightIn = (TextView) findViewById (R.id.WeightInput1);

edited Oct 30, 2014 at 11:56

answered Oct 30, 2014 at 11:45

M D

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Comments

Krupa Patel · Accepted Answer · 2014-10-30 11:45:42Z

2

Change this:

<TextView
    android:id="@+id/HeightInput1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/HeightInput"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<TextView
    android:id="@+id/WeightInput1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/WeightInput"
    android:textAppearance="?android:attr/textAppearanceMedium" />

Via

<EditText
    android:id="@+id/HeightInput1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/HeightInput"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText
    android:id="@+id/WeightInput1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/WeightInput"
    android:textAppearance="?android:attr/textAppearanceMedium" />

OR

heightIn = (EditText) findViewById (R.id.HeightInput1);
weightIn = (EditText) findViewById (R.id.WeightInput1);

via

heightIn = (TextView) findViewById (R.id.HeightInput1);
weightIn = (TextView) findViewById (R.id.WeightInput1);

answered Oct 30, 2014 at 11:45

Krupa Patel

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1 Comment

Krupa Patel Over a year ago

Hope this may help you!

duggu · Accepted Answer · 2014-10-30 11:46:21Z

2

in java file

heightIn = (EditText) findViewById (R.id.HeightInput1);

and

in xml file

<TextView
    android:id="@+id/HeightInput1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/HeightInput"
    android:textAppearance="?android:attr/textAppearanceMedium" />

So change according to your requirement.

answered Oct 30, 2014 at 11:46

duggu

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Comments

Amy · Accepted Answer · 2014-10-30 11:46:14Z

1

In Xml file you are declare as TextView and you are trying to parse TextView to EditText that's why you are getting an Exception.

Change EditText Variable

private EditText heightIn;
private EditText weightIn;

To

private TextView heightIn;
private TextView weightIn;

And replace your initializeApp() function with:

private void initializeApp() {
    heightIn = (TextView) findViewById (R.id.HeightInput1);
    weightIn = (TextView) findViewById (R.id.WeightInput1);
    CalculateButton = (Button) findViewById (R.id.CalculateButton);
    BmiResult = (EditText) findViewById (R.id.BmiResult);

}

answered Oct 30, 2014 at 11:46

Amy

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Comments

Krupa Patel · Accepted Answer · 2014-10-30 12:30:01Z

1

 heightIn = (EditText) findViewById (R.id.HeightInput1);

Here you mentioned heightIn as EditTect and in your layout.xml it is as TextView,
instead of finding "HeightInput1" which is just your text to label, it should find the EditText

 heightIn = (EditText) findViewById (R.id.EditText1);

same with the weight input... good luck!

edited Oct 30, 2014 at 12:30

Krupa Patel

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answered Oct 30, 2014 at 11:50

geonz

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Comments

Sainath Patwary karnate · Accepted Answer · 2014-10-30 12:45:15Z

1

There are two possibilities, HeightInput1 id component should be Edit text not a text view
else In code change the Edit text to Text view whose id is HeightInput1

so change java code with this

    heightIn = (TextView) findViewById (R.id.HeightInput1);  
    weightIn = (TextView) findViewById (R.id.WeightInput1);

else change in xml file with this

  <EditText
   android:id="@+id/HeightInput1"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="@string/HeightInput"
   android:textAppearance="?android:attr/textAppearanceMedium" />

edited Oct 30, 2014 at 12:45

answered Oct 30, 2014 at 11:45

Sainath Patwary karnate

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3 Comments

lxg Over a year ago

This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post.

Sainath Patwary karnate Over a year ago

is it ok now ,else do you think anything more can be done to this?

lxg Over a year ago

Yeah, that does look like a nice answer. :)

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