My app stops working in the AVD

Question

I'm very new. I don't have any error warning, but when I test, it unfortunately stops working. I've changed the AVD ram value, but still not work. I tried to export it to my phone, but it fails to install.

my activity file

package com.abdo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

 private static String logtag = "TwoButtonApp";//for use as the tag when logging 

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

        Button buttonStart = (Button)findViewById(R.id.buttonStart);        
     buttonStart.setOnClickListener(startListener); // Register the onClick listener with the implementation above

     Button buttonStop = (Button)findViewById(R.id.buttonStop);        
     buttonStop.setOnClickListener(stopListener); // Register the onClick listener with the implementation above
    }

    //Create an anonymous implementation of OnClickListener
    private OnClickListener startListener = new OnClickListener() {
        public void onClick(View v) {
          Log.d(logtag,"onClick() called - start button");   
          Intent a = new Intent(MainActivity.this, ManuActivity.class);
          startActivity(a);

          Log.d(logtag,"onClick() ended - start button");
        }
    };

    // Create an anonymous implementation of OnClickListener
    private OnClickListener stopListener = new OnClickListener() {
        public void onClick(View v) {
         Log.d(logtag,"onClick() called - stop button"); 
         Toast.makeText(MainActivity.this, "The Stop button was clicked.", Toast.LENGTH_LONG).show();
          Log.d(logtag,"onClick() ended - stop button");
        } 
    };


    @Override
 protected void onStart() {//activity is started and visible to the user
  Log.d(logtag,"onStart() called");
  super.onStart();  
 }
 @Override
 protected void onResume() {//activity was resumed and is visible again
  Log.d(logtag,"onResume() called");
  super.onResume();

 }
 @Override
 protected void onPause() { //device goes to sleep or another activity appears
  Log.d(logtag,"onPause() called");//another activity is currently running (or user has pressed Home)
  super.onPause();

 }
 @Override
 protected void onStop() { //the activity is not visible anymore
  Log.d(logtag,"onStop() called");
  super.onStop();

 }
 @Override
 protected void onDestroy() {//android has killed this activity
   Log.d(logtag,"onDestroy() called");
   super.onDestroy();
 }
}

manifest

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />


    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/FullscreenTheme" >
        <activity
            android:name="com.abdo.MainActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.NoTitleBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.abdo.ManuActivity"
            android:label="@string/title_activity_manu" >
        </activity>
    </application>

</manifest>

Answer 1

• Firstly set the android:debuggable to true in your manifest file.
• Secondly, turn on install apk from unknown sources in your android device's settings and also turn on allow to debug through usb setting in developer settings or kinda that (don't know how this calls on english, I have russian interface).
• Then run your code in debug mode, pressing debug button in your IDE.

And also try to write your code after the super function call.

 @Override
 protected void onStart() {//activity is started and visible to the user
  super.onStart();  
  Log.d(logtag,"onStart() called");
 }