Android App Installing "Application Not Installed"

I am trying to install and app. I developed it and signed it and exported it and when I go install o开发者_如何转开发n phone it comes up with "Application not installed".

No the application has not been installed before and I need to remove it. No debug mode is not true

Here is my manifest.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="spending.tracker"
  android:versionCode="1"
  android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name=".SpendingActivity"
              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=".ListExspenses" />
    <activity android:name=".GraphExpenses" />

</application>

Try to generate a new apk file with a fresh new keystore.