android中Activity之間跳轉

package com.yarin.android.Examples_03_01;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class Activity01 extends Activity
{
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v)
{
Intent intent = new Intent();
intent.setClass(Activity01.this, Activity02.class);
startActivity(intent);
Activity01.this.finish();
}
});
}
}
package com.yarin.android.Examples_03_01;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class Activity02 extends Activity
{
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
Button button = (Button) findViewById(R.id.button2);
button.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v)
{
Intent intent = new Intent();
intent.setClass(Activity02.this, Activity03.class);
startActivity(intent);
Activity02.this.finish();
}
});
}
}
 
 
 
 
 
package com.yarin.android.Examples_03_01;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class Activity03 extends Activity
{
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main3);
Button button = (Button) findViewById(R.id.button3);
button.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v)
{
Intent intent = new Intent();
intent.setClass(Activity03.this, Activity01.class);
startActivity(intent);
Activity03.this.finish();
}
});
}
}