Question

Right now i am trying to create a graph in android by self learning.After did some searches on Google i got some ideas.It recommends me to use some library or jar files for creating graphs or charts on android.Like wise i got kichart WinRAR file from this link.

After emulator getting run,its just toasting as “sorry your application has stopped unexpectedly.please try again.force to close”

Can any one please help me to overcome this issue?
Please find my sources for reference.

MainActiviy.java

package com.example.z_chart;

import com.kidroid.kichart.ChartActivity;
import com.kidroid.kichart.model.Aitem;
import com.kidroid.kichart.view.LineView;
import android.graphics.Color;
import android.os.Bundle;

public class MainActivity extends ChartActivity 
{
LineView lv = null;

@Override
public void onCreate(Bundle savedInstanceState) 
{

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

String[] arrX = new String[4];
arrX[0] = "2010.1";
arrX[1] = "2010.2";
arrX[2] = "2010.3";
arrX[3] = "2010.4";

float[] arr = new float[4];
arr[0] = 100;
arr[1] = 150;
arr[2] = 380;
arr[3] = 300;


Aitem[] items = new Aitem[1];
items[0] = new Aitem(Color.RED, "Payout", arr);

lv = new LineView(this);
lv.setTitle("Money balance in four months");
lv.setAxisValueX(arrX);
lv.setItems(items);
setContentView(lv);
}}

LOGCAT

08-17 11:08:53.473: W/dalvikvm(345): Unable to resolve superclass of Lcom/example/z_chart/MainActivity; (414)
08-17 11:08:53.473: W/dalvikvm(345): Link of class 'Lcom/example/z_chart/MainActivity;' failed
08-17 11:08:53.523: D/AndroidRuntime(345): Shutting down VM
08-17 11:08:53.523: W/dalvikvm(345): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
08-17 11:08:53.604: E/AndroidRuntime(345): FATAL EXCEPTION: main
08-17 11:08:53.604: E/AndroidRuntime(345): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.z_chart/com.example.z_chart.MainActivity}: java.lang.ClassNotFoundException: com.example.z_chart.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.z_chart-1.apk]
08-17 11:08:53.604: E/AndroidRuntime(345):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
08-17 11:08:53.604: E/AndroidRuntime(345):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-17 11:08:53.604: E/AndroidRuntime(345):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-17 11:08:53.604: E/AndroidRuntime(345):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-17 11:08:53.604: E/AndroidRuntime(345):  at android.os.Handler.dispatchMessage(Handler.java:99)
08-17 11:08:53.604: E/AndroidRuntime(345):  at android.os.Looper.loop(Looper.java:123)
08-17 11:08:53.604: E/AndroidRuntime(345):  at android.app.ActivityThread.main(ActivityThread.java:4627)
08-17 11:08:53.604: E/AndroidRuntime(345):  at java.lang.reflect.Method.invokeNative(Native Method)
08-17 11:08:53.604: E/AndroidRuntime(345):  at java.lang.reflect.Method.invoke(Method.java:521)
08-17 11:08:53.604: E/AndroidRuntime(345):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-17 11:08:53.604: E/AndroidRuntime(345):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-17 11:08:53.604: E/AndroidRuntime(345):  at dalvik.system.NativeStart.main(Native Method)
08-17 11:08:53.604: E/AndroidRuntime(345): Caused by: java.lang.ClassNotFoundException: com.example.z_chart.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.z_chart-1.apk]
08-17 11:08:53.604: E/AndroidRuntime(345):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
08-17 11:08:53.604: E/AndroidRuntime(345):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
08-17 11:08:53.604: E/AndroidRuntime(345):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
08-17 11:08:53.604: E/AndroidRuntime(345):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
08-17 11:08:53.604: E/AndroidRuntime(345):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
08-17 11:08:53.604: E/AndroidRuntime(345):  ... 11 more

Manifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.z_chart"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="10" />

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/title_activity_main" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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

Thanks in advance!..

Answer 1

Try to Clean your Project and then check again.

Click on Project -> Clean in Eclipse.

Clean the project and build it again , so that the R.java is updated and doesn’t uses any cached files

Here you can find different different solutions.

or

Remove this line from your code.

setContentView(R.layout.activity_main);