3、Android中Activity的跳转

package com.example.helloworld;

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


public class MainActivity extends Activity 
{
    private Button button;
	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		   this.button = (Button) this.findViewById(R.id.button1);
	        this.button.setOnClickListener(new OnClickListener() {
	            @Override
	            public void onClick(View v) {
	                Intent intent = new Intent();
	                intent.setClass(MainActivity.this, IntentActivity.class);
	                intent.putExtra("name", "Hello World");
	                startActivity(intent);
	            }
	        });	
	}	
}

<activity 
			android:name="com.example.helloworld.IntentActivity"> </activity>

package com.example.helloworld;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.content.Intent;
public class IntentActivity extends Activity
{
	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_intent);
		Intent intent = getIntent();
		String string = intent.getStringExtra("name");

		TextView textView = new TextView(this);
		textView.setTextSize(40);
		textView.setText(string);
		
		setContentView(textView);
	}
}

4、运行