Android - FATAL EXCEPTION: main - Unable to start activity ComponentInfo

java android fatal-error classcastexception runtimeexception
51,575

Solution 1

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

at com.troysantry.tipcalculator.TipCalc.onCreate(TipCalc.java:45)

LogCat is your friend.

You have a TextView in your layout, however in your code, you are trying to turn it into an EditText.

After re-reading your code, there does not appear to be a problem, please try Cleaning your project.

Project -> Clean

Solution 2

From my experience, It's a problem with RelativeLayout. I don't know what's the problem, but following 2 solutions worked for me.

  1. Clean your project and run again. If it's not successful, then
  2. Change RelativeLayout to LinearLayout (This needs to remove relative attributes also. And a fair work to arrange views).
Share:
51,575
Admin
Author by

Admin

Updated on April 18, 2020

Comments

  • Admin
    Admin about 4 years

    My problem is that when I run my app on the android emulator the app starts up but quickly crashes and displays the popup: "Unfortunately, TipCalculator has stopped." I have looked through the code and have searched the internet thoroughly for an answer. Yes I am a newby at android development. I have looked at the errors that have been generated by LogCat but do not know the problem and where to find it based on the errors I received.

    Here is my code:

    TipCalc.java

    package com.troysantry.tipcalculator;

    import android.os.Bundle;
import android.app.Activity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.widget.EditText;

public class TipCalc extends Activity {

    public static final String TOTAL_BILL = "TOTAL_BILL";
    public static final String CURRENT_TIP = "CURRENT_TIP";
    public static final String BILL_WITHOUT_TIP = "BILL_WITHOUT_TIP";

    public double billBeforeTip;
    public double tipAmount;
    public double finalBill;

    EditText txtBillBeforeTip;
    EditText txtTipAmount;
    EditText txtFinalBill;

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

        if(savedInstanceState==null){

            billBeforeTip=0.0;
            tipAmount=0.15;
            finalBill=0.0;
        }
        else{

            billBeforeTip=savedInstanceState.getDouble(BILL_WITHOUT_TIP);
            tipAmount=savedInstanceState.getDouble(CURRENT_TIP);
            finalBill=savedInstanceState.getDouble(TOTAL_BILL);

        }
            txtBillBeforeTip = (EditText) findViewById(R.id.txtBill);
            txtTipAmount=(EditText) findViewById(R.id.txtTip);
            txtFinalBill=(EditText) findViewById(R.id.txtFinal);

            txtBillBeforeTip.addTextChangedListener(billBeforeTipListener);     
    }

    private TextWatcher billBeforeTipListener = new TextWatcher(){

        @Override
        public void afterTextChanged(Editable arg0) {
            // TODO Auto-generated method stub

        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before,
                int count) {

            try{
                billBeforeTip = Double.parseDouble(s.toString());

            }
            catch(NumberFormatException e){
                billBeforeTip=0.0;
            }

            UpdateTipAndFinalBill();    
        }
    };

    protected void onSaveInstanceState(Bundle outState){

        super.onSaveInstanceState(outState);

        outState.putDouble(TOTAL_BILL, finalBill);
        outState.putDouble(CURRENT_TIP, tipAmount);
        outState.putDouble(BILL_WITHOUT_TIP, billBeforeTip);

    }

    private void UpdateTipAndFinalBill(){
        double tipAmount = Double.parseDouble(txtTipAmount.getText().toString());

        double finalBill = billBeforeTip + (billBeforeTip*tipAmount);

        txtFinalBill.setText(String.format("%.02f",finalBill));

    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.tip_calc, menu);
        return true;
    }

}

    activity_tip_calc.xml

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    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=".TipCalc" >

    <TextView
        android:id="@+id/tvBill"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="19dp"
        android:layout_marginTop="14dp"
        android:text="@string/bill_text_view" />

    <TextView
        android:id="@+id/tvFinal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/txtBill"
        android:layout_below="@+id/txtBill"
        android:layout_marginRight="24dp"
        android:layout_marginTop="18dp"
        android:text="@string/final_text_view" />

    <EditText
        android:id="@+id/txtFinal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/tvFinal"
        android:layout_alignBottom="@+id/tvFinal"
        android:layout_alignRight="@+id/txtTip"
        android:layout_marginRight="25dp"
        android:ems="6"
        android:inputType="numberDecimal"
        android:text="@string/final_bill_edit_text" />

    <TextView
        android:id="@+id/tvTip"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/tvFinal"
        android:layout_centerHorizontal="true"
        android:text="@string/tip_text_view" />

    <EditText
        android:id="@+id/txtTip"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/tvTip"
        android:layout_alignBottom="@+id/tvTip"
        android:layout_toRightOf="@+id/tvTip"
        android:ems="5"
        android:inputType="numberDecimal"
        android:text="@string/tip_edit_text"
        android:textSize="16sp" />

    <EditText
        android:id="@+id/txtBill"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/tvBill"
        android:layout_alignBottom="@+id/tvBill"
        android:layout_toRightOf="@+id/tvBill"
        android:ems="5"
        android:inputType="numberDecimal"
        android:text="@string/bill_edit_text"
        android:textSize="16sp" />

</RelativeLayout>

    LogCat

    11-04 01:24:10.403: D/AndroidRuntime(1050): Shutting down VM
11-04 01:24:10.403: W/dalvikvm(1050): threadid=1: thread exiting with uncaught exception (group=0x41465700)
11-04 01:24:10.543: E/AndroidRuntime(1050): FATAL EXCEPTION: main
11-04 01:24:10.543: E/AndroidRuntime(1050): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.troysantry.tipcalculator/com.troysantry.tipcalculator.TipCalc}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.os.Looper.loop(Looper.java:137)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.main(ActivityThread.java:5103)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at java.lang.reflect.Method.invokeNative(Native Method)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at java.lang.reflect.Method.invoke(Method.java:525)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at dalvik.system.NativeStart.main(Native Method)
11-04 01:24:10.543: E/AndroidRuntime(1050): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 01:24:10.543: E/AndroidRuntime(1050):     at com.troysantry.tipcalculator.TipCalc.onCreate(TipCalc.java:45)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.Activity.performCreate(Activity.java:5133)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
11-04 01:24:10.543: E/AndroidRuntime(1050):     ... 11 more
11-04 01:29:11.177: I/Process(1050): Sending signal. PID: 1050 SIG: 9
11-04 01:31:32.080: D/AndroidRuntime(1109): Shutting down VM
11-04 01:31:32.080: W/dalvikvm(1109): threadid=1: thread exiting with uncaught exception (group=0x41465700)
11-04 01:31:32.194: E/AndroidRuntime(1109): FATAL EXCEPTION: main
11-04 01:31:32.194: E/AndroidRuntime(1109): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.troysantry.tipcalculator/com.troysantry.tipcalculator.TipCalc}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.os.Looper.loop(Looper.java:137)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.main(ActivityThread.java:5103)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at java.lang.reflect.Method.invokeNative(Native Method)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at java.lang.reflect.Method.invoke(Method.java:525)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at dalvik.system.NativeStart.main(Native Method)
11-04 01:31:32.194: E/AndroidRuntime(1109): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 01:31:32.194: E/AndroidRuntime(1109):     at com.troysantry.tipcalculator.TipCalc.onCreate(TipCalc.java:44)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.Activity.performCreate(Activity.java:5133)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
11-04 01:31:32.194: E/AndroidRuntime(1109):     ... 11 more
11-04 01:36:33.195: I/Process(1109): Sending signal. PID: 1109 SIG: 9
11-04 02:11:09.684: D/AndroidRuntime(1167): Shutting down VM
11-04 02:11:09.684: W/dalvikvm(1167): threadid=1: thread exiting with uncaught exception (group=0x41465700)
11-04 02:11:09.855: E/AndroidRuntime(1167): FATAL EXCEPTION: main
11-04 02:11:09.855: E/AndroidRuntime(1167): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.troysantry.tipcalculator/com.troysantry.tipcalculator.TipCalc}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.os.Looper.loop(Looper.java:137)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.main(ActivityThread.java:5103)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at java.lang.reflect.Method.invokeNative(Native Method)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at java.lang.reflect.Method.invoke(Method.java:525)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at dalvik.system.NativeStart.main(Native Method)
11-04 02:11:09.855: E/AndroidRuntime(1167): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 02:11:09.855: E/AndroidRuntime(1167):     at com.troysantry.tipcalculator.TipCalc.onCreate(TipCalc.java:44)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.Activity.performCreate(Activity.java:5133)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
11-04 02:11:09.855: E/AndroidRuntime(1167):     ... 11 more
  • Raghunandan
    Raghunandan over 10 years
    R.id.txtBill, R.id.txtTip, R.id.txtFinal all ids of editText only
  • Raghunandan
    Raghunandan over 10 years
    R.id.txtBill, R.id.txtTip, R.id.txtFinal all ids of editText only .i too made a mistake posting it an answer before deleting it
  • Raghunandan
    Raghunandan over 10 years
    "Change RelativeLayout to LinearLayout". whats wrong with relative layout. no need for that. clean and build should work
  • Nizam
    Nizam over 10 years
    @Raghunandan: Yup,It should work. But I don't know, sometimes it doesn't.
  • harris
    harris over 10 years
    Please check line 45 in TipCalc.java
  • Madhav Kishore
    Madhav Kishore almost 10 years
    @Nizam You are right... clean didn't work but changing from relative to linear fixed it..

Recents

Why Is PNG file with Drop Shadow in Flutter Web App Grainy?
How to troubleshoot crashes detected by Google Play Store for Flutter app
Cupertino DateTime picker interfering with scroll behaviour
Why does awk -F work for most letters, but not for the letter "t"?
Flutter change focus color and icon color but not works
How to print and connect to printer using flutter desktop via usb?
Critical issues have been reported with the following SDK versions: com.google.android.gms:play-services-safetynet:17.0.0
Flutter Dart - get localized country name from country code
navigatorState is null when using pushNamed Navigation onGenerateRoutes of GetMaterialPage
Android Sdk manager not found- Flutter doctor error
Flutter Laravel Push Notification without using any third party like(firebase,onesignal..etc)
How to change the color of ElevatedButton when entering text in TextField

Related

Android java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.EditText
Android.widget.RelativeLayout cannot be cast to android.widget.ImageView
android.widget.FrameLayout$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams
Android: java.lang.RuntimeException: takePicture failed
java.lang.RuntimeException: takePicture failed
Fatal Error: Invalid Layout of java.lang.String at value
"RuntimeException: native typeface cannot be made" when loading font
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=intent} to activity
Error : Flutter - Missing 'package' key attribute on element package at [com.google.android.gms:play-services-maps:18.0.2] AndroidManifest.xml:33:9-64
flutter gradle build failed with gradle 4.2.2 and sdk version 31