Android Intent实现页面之间跳转

什么是Intent
Intent可以理解为信使（意图）
由Intent来协助完成Android各个组件之间的通讯
Intent实现页面逐渐的跳转
1.startActivity(inetnt)
2.startActivityForResult(intent, requestCode);
onAcitivtyResult(int requestCode, int resultCode, Intent data)
setResult(resultCode, data);

先创建两个xml文件firstactivity.xml和secondactivity.xml。

package com.example.intentdemo;

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 SecondActivity extends Activity {

private Button button;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.secondactivity);

button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View view) {
int resultCode = 2;
Intent data = new Intent();
data.putExtra("data", "这是第二个Activity返回的结果");
setResult(resultCode, data);
finish();
}
});
}

}

SecondActivity.java
效果：