Question

Im designing my first android application and keep coming up with the following error which is draining the life out of me and I do not understand it very well (Please find my Logcat (verbose), Java Code(this i played around with and this began to occur once started to work on my editButton and buttonUpdate bit. Does it have anything to do with the editStatus? I really think it may) and I have also put in my manifest file:

LOGCAT verbose

04-21 15:30:23.388: D/AndroidRuntime(276): Shutting down VM
04-21 15:30:23.388: W/dalvikvm(276): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
04-21 15:30:23.427: E/AndroidRuntime(276): FATAL EXCEPTION: main
04-21 15:30:23.427: E/AndroidRuntime(276): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.locator.demo/com.locator.demo.LocatorDemoActivity}: java.lang.ClassCastException: android.widget.TextView
04-21 15:30:23.427: E/AndroidRuntime(276):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
04-21 15:30:23.427: E/AndroidRuntime(276):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-21 15:30:23.427: E/AndroidRuntime(276):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-21 15:30:23.427: E/AndroidRuntime(276):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-21 15:30:23.427: E/AndroidRuntime(276):  at android.os.Handler.dispatchMessage(Handler.java:99)
04-21 15:30:23.427: E/AndroidRuntime(276):  at android.os.Looper.loop(Looper.java:123)
04-21 15:30:23.427: E/AndroidRuntime(276):  at android.app.ActivityThread.main(ActivityThread.java:4627)
04-21 15:30:23.427: E/AndroidRuntime(276):  at java.lang.reflect.Method.invokeNative(Native Method)
04-21 15:30:23.427: E/AndroidRuntime(276):  at java.lang.reflect.Method.invoke(Method.java:521)
04-21 15:30:23.427: E/AndroidRuntime(276):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-21 15:30:23.427: E/AndroidRuntime(276):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-21 15:30:23.427: E/AndroidRuntime(276):  at dalvik.system.NativeStart.main(Native Method)
04-21 15:30:23.427: E/AndroidRuntime(276): Caused by: java.lang.ClassCastException: android.widget.TextView
04-21 15:30:23.427: E/AndroidRuntime(276):  at com.locator.demo.LocatorDemoActivity.onCreate(LocatorDemoActivity.java:21)
04-21 15:30:23.427: E/AndroidRuntime(276):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-21 15:30:23.427: E/AndroidRuntime(276):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
04-21 15:30:23.427: E/AndroidRuntime(276):  ... 11 more
04-21 15:35:23.607: I/Process(276): Sending signal. PID: 276 SIG: 9
04-21 15:50:32.127: D/AndroidRuntime(301): Shutting down VM
04-21 15:50:32.127: W/dalvikvm(301): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
04-21 15:50:32.147: E/AndroidRuntime(301): FATAL EXCEPTION: main
04-21 15:50:32.147: E/AndroidRuntime(301): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.locator.demo/com.locator.demo.LocatorDemoActivity}: java.lang.ClassCastException: android.widget.TextView
04-21 15:50:32.147: E/AndroidRuntime(301):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
04-21 15:50:32.147: E/AndroidRuntime(301):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-21 15:50:32.147: E/AndroidRuntime(301):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-21 15:50:32.147: E/AndroidRuntime(301):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-21 15:50:32.147: E/AndroidRuntime(301):  at android.os.Handler.dispatchMessage(Handler.java:99)
04-21 15:50:32.147: E/AndroidRuntime(301):  at android.os.Looper.loop(Looper.java:123)
04-21 15:50:32.147: E/AndroidRuntime(301):  at android.app.ActivityThread.main(ActivityThread.java:4627)
04-21 15:50:32.147: E/AndroidRuntime(301):  at java.lang.reflect.Method.invokeNative(Native Method)
04-21 15:50:32.147: E/AndroidRuntime(301):  at java.lang.reflect.Method.invoke(Method.java:521)
04-21 15:50:32.147: E/AndroidRuntime(301):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-21 15:50:32.147: E/AndroidRuntime(301):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-21 15:50:32.147: E/AndroidRuntime(301):  at dalvik.system.NativeStart.main(Native Method)
04-21 15:50:32.147: E/AndroidRuntime(301): Caused by: java.lang.ClassCastException: android.widget.TextView
04-21 15:50:32.147: E/AndroidRuntime(301):  at com.locator.demo.LocatorDemoActivity.onCreate(LocatorDemoActivity.java:21)
04-21 15:50:32.147: E/AndroidRuntime(301):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-21 15:50:32.147: E/AndroidRuntime(301):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
04-21 15:50:32.147: E/AndroidRuntime(301):  ... 11 more

CODE:

package com.locator.demo;

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;


public class LocatorDemoActivity extends Activity implements OnClickListener {
    EditText editStatus;
    Button buttonUpdate;

     /** Called when the activity is first created. */
     @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.locationstatus); 

        editStatus = (EditText)findViewById(R.id.edit_status);
        buttonUpdate = (Button)findViewById(R.id.button_update);
        buttonUpdate.setOnClickListener(this);

                //have button 'listen' for click

    }

    public void onClick(View arg0) {
        // TODO Auto-generated method stub

    }

}

ANDROID Manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.locator.demo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_main" >
        <activity
            android:name=".LocatorDemoActivity"
            android:label="@string/app_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

I have;

attempted to do adb kill-server and adb start-server and run it with an without an emulator as suggested in another post. Please be slightly understanding as my knowledge of eclipse and Java is pretty low and im learning.

Please help

Answer 1

As seen from this error:

java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.locator.demo/com.locator.demo.LocatorDemoActivity}:
java.lang.ClassCastException: android.widget.TextView

And this one:

Caused by: java.lang.ClassCastException: android.widget.TextView

You are trying to cast a TextView to EditText ( in this line: editStatus = (EditText)findViewById(R.id.edit_status);).

Go to locationstatus.xml, and change the TextView with the id edit_status to EditText.