要崩溃了，两个Activity没法跳转，什么错都不报，3天了系统都重装了

要崩溃了，两个Activity无法跳转，什么错都不报，3天了系统都重装了
新手，跪求答案。

目录结构、android版本。点按钮就卡那里不动

第一个Activity。

Java code

package my.android;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MyAndroidActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        TextView tvTextView=(TextView) findViewById(R.id.mytv);
        tvTextView.setText("wo cao");
        Button btnButton=(Button) findViewById(R.id.mybutton);
        btnButton.setText("my button");
        btnButton.setOnClickListener(new android.view.View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
            //    MyAndroidActivity.this.finish();
                Intent intent=new Intent();
                intent.putExtra("key", "zai cao");
                intent.setClass(MyAndroidActivity.this, ActivityTwo.class);
                MyAndroidActivity.this.startService(intent);
            //    MyAndroidActivity.this.finish();
            }
        });
    }
 
   /*  class MyButtonLN implements android.view.View.OnClickListener{
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent intent=new Intent();
                intent.setClass(MyAndroidActivity.this, ActivityTwo.class);
                MyAndroidActivity.this.startService(intent);
            }
            
       } 
 */
}

第二个Activity

Java code

package my.android;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class ActivityTwo extends Activity {

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.two);
        Intent thisintent=getIntent();
        String keyValue=thisintent.getStringExtra("key");
        TextView tvTextView=(TextView) findViewById(R.id.twotv);
        tvTextView.setText(keyValue);
 
    }  
}

R文件

Java code


package my.android;

public final class R {
    public static final class attr {
    }
    public static final class drawable {
        public static final int ic_launcher=0x7f020000;
    }
    public static final class id {
        public static final int mybutton=0x7f050001;
        public static final int mytv=0x7f050000;
        public static final int twotv=0x7f050002;
    }
    public static final class layout {
        public static final int main=0x7f030000;
        public static final int two=0x7f030001;
    }
    public static final class string {
        public static final int app_name=0x7f040001;
        public static final int hello=0x7f040000;
    }
}

layout文件夹，main.xml

XML code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/mytv"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <Button 
        android:id="@+id/mybutton"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

</LinearLayout>

要崩溃了，两个Activity没法跳转，什么错都不报，3天了系统都重装了

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