CODEWITHSUNDEEP
javaandroideclipseandroid-manifest
user3379235
user3379235

Reputation: 29

Android: Unable to instantiate application

I've got a little, simple project, but when I go to start it, I receive an error back. I guess it's a simple mistake in the Manifest, but I can't fix it. Logcat says Unable to instantiate application. Any help appreciated.

Manifest:

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

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="21" />

    <application
        android:name="com.example.meter.ModelData"
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >


        <activity android:name="com.example.meter.MeterID"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
                <activity android:name="com.example.meter.DatenSenden" >
        </activity>
    </application>

Application: package com.example.meter;

import android.app.Application;

    public class ModelData extends Application{

        private String meterID;
        private String name;

        public ModelData(String meterID, String name) {
            this.meterID = meterID;
            this.name = name;
        }

        public String getName() {
            return name;
        }

        public void setName(String aName) {
            name = aName;
        }

        public String getMeterID() {
            return meterID;
        }

        public void setMeterID(String aMeterID) {
            meterID = aMeterID;
        }

    }

Errorlog:

04-11 22:21:05.636: D/ResourcesManager(3291): creating new AssetManager and set to /data/app/com.example.meter-2/base.apk
04-11 22:21:05.666: D/AndroidRuntime(3291): Shutting down VM
04-11 22:21:05.666: E/AndroidRuntime(3291): FATAL EXCEPTION: main
04-11 22:21:05.666: E/AndroidRuntime(3291): Process: com.example.meter, PID: 3291
04-11 22:21:05.666: E/AndroidRuntime(3291): java.lang.RuntimeException: Unable to instantiate application com.example.meter.ModelData: java.lang.InstantiationException: class com.example.meter.ModelData has no zero argument constructor
04-11 22:21:05.666: E/AndroidRuntime(3291):     at android.app.LoadedApk.makeApplication(LoadedApk.java:625)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5088)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at android.app.ActivityThread.access$1600(ActivityThread.java:177)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1509)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at android.os.Handler.dispatchMessage(Handler.java:102)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at android.os.Looper.loop(Looper.java:145)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at android.app.ActivityThread.main(ActivityThread.java:5944)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at java.lang.reflect.Method.invoke(Native Method)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at java.lang.reflect.Method.invoke(Method.java:372)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1389)
04-11 22:21:05.666: E/AndroidRuntime(3291):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1184)
04-11 22:21:05.666: E/AndroidRuntime(3291): Caused by: java.lang.InstantiationException: class com.example.meter.ModelData has no zero argument constructor

Upvotes: 0

Views: 980

Answers (1)

CommonsWare
CommonsWare

Reputation: 1006604

Get rid of your ModelData constructor. Nothing will ever call it, and it is eliminating the default public zero-argument constructor that you need.

Better yet, have ModelData not extend Application and do not register it in the manifest in the <application> element. Your ModelData does not seem to warrant creating a custom Application subclass.

Upvotes: 1

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