Java – unfortunately, (APP name) has stopped. Eclipse / Android

I'm new to eclipse and want to know how to keep this information

Unfortunately, (App Name) has stopped." 

Every time I run my test application in AVD, it displays. I'm trying to make the lineview layout, and eclipse displays no errors. So how to solve this problem? If eclipse doesn't show the problem, how do you find out what the problem is?

(this is a copy of my logcat)

05-29 23:49:12.604: D/AndroidRuntime(832): Shutting down VM
05-29 23:49:12.675: W/dalvikvm(832): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
05-29 23:49:12.775: E/AndroidRuntime(832): FATAL EXCEPTION: main
05-29 23:49:12.775: E/AndroidRuntime(832): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{testing.android.application.three/testing.android.application.three.MainActivityThreeActivity}: java.lang.ClassNotFoundException: Didn't find class "testing.android.application.three.MainActivityThreeActivity" on path: /data/app/testing.android.application.three-1.apk
05-29 23:49:12.775: E/AndroidRuntime(832):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106)
05-29 23:49:12.775: E/AndroidRuntime(832):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
05-29 23:49:12.775: E/AndroidRuntime(832):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
05-29 23:49:12.775: E/AndroidRuntime(832):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
05-29 23:49:12.775: E/AndroidRuntime(832):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-29 23:49:12.775: E/AndroidRuntime(832):  at android.os.Looper.loop(Looper.java:137)
05-29 23:49:12.775: E/AndroidRuntime(832):  at android.app.ActivityThread.main(ActivityThread.java:5041)
05-29 23:49:12.775: E/AndroidRuntime(832):  at java.lang.reflect.Method.invokeNative(Native Method)
05-29 23:49:12.775: E/AndroidRuntime(832):  at java.lang.reflect.Method.invoke(Method.java:511)
05-29 23:49:12.775: E/AndroidRuntime(832):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-29 23:49:12.775: E/AndroidRuntime(832):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-29 23:49:12.775: E/AndroidRuntime(832):  at dalvik.system.NativeStart.main(Native Method)
05-29 23:49:12.775: E/AndroidRuntime(832): Caused by: java.lang.ClassNotFoundException: Didn't find class "testing.android.application.three.MainActivityThreeActivity" on path: /data/app/testing.android.application.three-1.apk
05-29 23:49:12.775: E/AndroidRuntime(832):  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
05-29 23:49:12.775: E/AndroidRuntime(832):  at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
05-29 23:49:12.775: E/AndroidRuntime(832):  at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
05-29 23:49:12.775: E/AndroidRuntime(832):  at android.app.Instrumentation.newActivity(Instrumentation.java:1054)
05-29 23:49:12.775: E/AndroidRuntime(832):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
05-29 23:49:12.775: E/AndroidRuntime(832):  ... 11 more
05-29 23:49:30.595: E/Trace(851): error opening trace file: No such file or directory (2)
05-29 23:49:30.965: D/AndroidRuntime(851): Shutting down VM
05-29 23:49:31.015: W/dalvikvm(851): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
05-29 23:49:31.075: E/AndroidRuntime(851): FATAL EXCEPTION: main
05-29 23:49:31.075: E/AndroidRuntime(851): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{testing.android.application.three/testing.android.application.three.MainActivityThreeActivity}: java.lang.ClassNotFoundException: Didn't find class "testing.android.application.three.MainActivityThreeActivity" on path: /data/app/testing.android.application.three-1.apk
05-29 23:49:31.075: E/AndroidRuntime(851):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106)
05-29 23:49:31.075: E/AndroidRuntime(851):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
05-29 23:49:31.075: E/AndroidRuntime(851):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
05-29 23:49:31.075: E/AndroidRuntime(851):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
05-29 23:49:31.075: E/AndroidRuntime(851):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-29 23:49:31.075: E/AndroidRuntime(851):  at android.os.Looper.loop(Looper.java:137)
05-29 23:49:31.075: E/AndroidRuntime(851):  at android.app.ActivityThread.main(ActivityThread.java:5041)
05-29 23:49:31.075: E/AndroidRuntime(851):  at java.lang.reflect.Method.invokeNative(Native Method)
05-29 23:49:31.075: E/AndroidRuntime(851):  at java.lang.reflect.Method.invoke(Method.java:511)
05-29 23:49:31.075: E/AndroidRuntime(851):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-29 23:49:31.075: E/AndroidRuntime(851):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-29 23:49:31.075: E/AndroidRuntime(851):  at dalvik.system.NativeStart.main(Native Method)
05-29 23:49:31.075: E/AndroidRuntime(851): Caused by: java.lang.ClassNotFoundException: Didn't find class "testing.android.application.three.MainActivityThreeActivity" on path: /data/app/testing.android.application.three-1.apk
05-29 23:49:31.075: E/AndroidRuntime(851):  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
05-29 23:49:31.075: E/AndroidRuntime(851):  at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
05-29 23:49:31.075: E/AndroidRuntime(851):  at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
05-29 23:49:31.075: E/AndroidRuntime(851):  at android.app.Instrumentation.newActivity(Instrumentation.java:1054)
05-29 23:49:31.075: E/AndroidRuntime(851):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
05-29 23:49:31.075: E/AndroidRuntime(851):  ... 11 more
05-29 23:49:35.207: I/Process(851): Sending signal. PID: 851 SIG: 9

(this is a copy of my activity_main_activity_three.xml)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_horizontal_margin"
    android:paddingLeft="@dimen/activity_vertical_margin"
    android:paddingRight="@dimen/activity_vertical_margin"
    android:paddingTop="@dimen/activity_horizontal_margin"
    tools:context=".MainActivityThree" >
</LinearLayout>

(this is a copy of my mainactivitythree. Java)

package testing.android.application.three;

import android.os.Bundle;
import android.app.ListActivity;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivityThree extends ListActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_main_activity_three);
        String[] names = new String[]{"Text 1","Text 2","Text 3","Text 4","Text 5","Text"};
        setlistadapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,names));   
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        // TODO Auto-generated method stub
        super.onListItemClick(l, v, position, id);
        Object o = this.getlistadapter().getItem(position);
        String keyword = o.toString();
        Toast.makeText(this, "Test 1" + keyword, Toast.LENGTH_LONG).show();
    }
}

(this is a copy of my threemanifest)

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

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:label="@string/AppName"
        android:icon="@drawable/ic_launcher"
        android:theme="@style/ThreeTheme">
        <activity
            android:name="testing.android.application.three.MainActivityThreeActivity"
            android:label="@string/AppName" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

resolvent:

Looking at the logcat and manifest, you can see that the name of the active class is different from the name of the class displayed in the manifest file

Therefore, to fix the problem, change this line in the listing

android:name="testing.android.application.three.MainActivityThreeActivity"

about

android:name="testing.android.application.three.MainActivityThree"

This can solve the problem!

Remember that the androidmanifest file "manages" your application. You must register in the manifest file and execute it correctly for every service and activity you want to use or every permission required by your application, otherwise you will encounter a similar crash