Java &引用；不幸的是，我的应用程序已停止；

我正在为android创建一个应用程序，但发现一个错误“不幸的是，我的应用程序已停止”，请帮助我

AndroidManifest.xml

SecondActivity.java

请帮助他解决问题

也请帮助我创建这样的简单应用？？请帮帮我

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图像：i.stack.imgur.com/20iUi.jpg

清单文件中的包名在IMO中不累加。请首先尝试更正它们

package="com.example.techtips"

及

尝试将第二个更改为：

 <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >

不，不，不，我的朋友。我们需要看看logcat，了解它为什么停止工作。此外，知道它何时停止工作也会有帮助（在启动时，尝试单击按钮等）。同意，这是太多的信息。Eclipse视图“LogCat”将向您显示应用程序的日志。您应该会看到一大块红色文本，这是堆栈跟踪（崩溃日志）。这些信息应该能让别人帮助你。我看你是新来的，所以需要一点帮助。尝试读取日志并查看错误发生的位置。发布日志，并对应用程序崩溃时正在执行的操作进行一些解释。发布您认为与崩溃相关的代码，而不是代码转储。如果我们认为需要更多的代码，我们会请求更多的代码。要找到LogCat，请转到窗口->显示视图->其他并搜索LogCata。非常感谢您

        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

        <TextView

           android:id="@+id/textView1"
           android:layout_gravity="center_horizontal"
           android:textSize="23dp"
           android:layout_marginTop="150dp"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="This Is Fist Activity Activity"/>

        <Button
           android:id="@+id/button1"
           android:layout_gravity="center_horizontal"
           android:layout_marginTop="20dp"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="      Second Activity     " 
           android:onClick="startSecondActivity"/>


        </LinearLayout>

        package com.example.techtips;

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


     public class MainActivity extends Activity {
         /** Called when the activity is first created. */

     @Override

       public void onCreate(Bundle savedInstanceState) 
     {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Toast.makeText(this, "On Create Called In First Activity",                  

    Toast.LENGTH_LONG).show();
        Log.i("FirstActivity", "Inside onCreate");        
    }   

   @Override

  protected void onStart() {
    // TODO Auto-generated method stub
    super.onStart();
    Toast.makeText(this, "On Start Called In First Activity",    

   Toast.LENGTH_LONG).show();
      Log.i("FirstActivity", "Inside onStart");

   }   

   @Override

    protected void onResume()

 {

       // TODO Auto-generated method stub

       super.onResume();

    Toast.makeText(this, "On Resume Called In First Activity",   

   Toast.LENGTH_LONG).show();
     Log.i("FirstActivity", "Inside onResume");
} 

@Override

protected void onPause() {
    // TODO Auto-generated method stub
    super.onPause();
    Toast.makeText(this, "On Pause Called In First Activity", 

Toast.LENGTH_LONG).show();
    Log.i("FirstActivity", "Inside onPause");
}

 @Override

protected void onStop() {
    // TODO Auto-generated method stub
    super.onStop();

    Toast.makeText(this, "On Stop Called In First Activity", Toast.LENGTH_LONG).show();
    Log.i("FirstActivity", "Inside onStop");
}

@Override

protected void onDestroy() 
 {
    // TODO Auto-generated method stub
    super.onDestroy();
    Toast.makeText(this, "On Destroy Called In First Activity", 

 Toast.LENGTH_LONG).show();
    Log.i("FirstActivity", "Inside onDestroy");

 }
 public void startSecondActivity(View V)
 {
    // create an new Intent and Start Second Activity
    Intent intent=new Intent(this,SecondActivity.class);
    startActivity(intent);
  }
}

  package com.example.techtips;

    import android.app.Activity;
    import android.os.Bundle;
    import android.util.Log;
    import android.widget.Toast;


   public class SecondActivity extends Activity
{
  /** Called when the activity is first created. */


@Override

  public void onCreate(Bundle savedInstanceState) 
{
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout2);
        Toast.makeText(this, "On Create Called In Second Activity", 

 Toast.LENGTH_LONG).show();
        Log.i("SecondActivity", "Inside onCreate");

}   

@Override

  protected void onStart() {
    // TODO Auto-generated method stub
    super.onStart();
    Toast.makeText(this, "On Start Called In Second Activity", 

   Toast.LENGTH_LONG).show();
    Log.i("SecondActivity", "Inside onStart");
}  

@Override

 protected void onResume()
{
    // TODO Auto-generated method stub
    super.onResume();

    Toast.makeText(this, "On Resume Called In Second Activity", 

    Toast.LENGTH_LONG).show();

           Log.i("SecondActivity", "Inside onResume");
}  

@Override

  protected void onPause() {
     // TODO Auto-generated method stub
    super.onPause();
    Toast.makeText(this, "On Pause Called In Second Activity", 

Toast.LENGTH_LONG).show();
     Log.i("SecondActivity", "Inside onPause");
 }


 @Override

protected void onStop() {
     // TODO Auto-generated method stub
    super.onStop();

    Toast.makeText(this, "On Stop Called In Second Activity",  

  Toast.LENGTH_LONG).show();

            Log.i("SecondActivity", "Inside onStop");
}

 @Override

 protected void onDestroy() 
{
    // TODO Auto-generated method stub
    super.onDestroy();
    Toast.makeText(this, "On Destroy Called In Second Activity", 

  Toast.LENGTH_LONG).show();
    Log.i("SecondActivity", "Inside onDestroy");    
   }
 }

package="com.example.techtips"

   <activity
        android:name="com.techblogon.activitylifecycleexample.MainActivity"
        android:label="@string/app_name" >

 <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >