两个Activity通过Intent传递数据

http://blog.csdn.net/hongshan50/article/details/6585396
这里有一份很好的文章:
http://www.cnblogs.com/feisky/archive/2010/01/16/1649081.html
1.无参数Activity跳转

1 2	Intent it = new Intent(Activity.Main.this, Activity2.class); startActivity(it);

2.向下一个Activity传递数据（使用Bundle和Intent.putExtras）
Intent it = new Intent(Activity.Main.this, Activity2.class);

Bundle bundle=new Bundle();

bundle.putString("name", "This is from MainActivity!");

it.putExtras(bundle); // it.putExtra(“test”, "shuju”);

startActivity(it); // startActivityForResult(it,REQUEST_CODE);

对于数据的获取可以采用：

1 2	Bundle bundle=getIntent().getExtras(); String name=bundle.getString("name");

或者：

Intent intent = getIntent();

intent.setClass(MyActivity.this,ForwardTarget.class);

intent.putExtra("param1","Pandy");

intent.putExtra("param2","GuiZhou");

startActivityForResult(intent, GET_CODE);

//获取参数，并显示。

Intent intent = getIntent();

String param1 = intent.getStringExtra("param1");

String param2 = intent.getStringExtra("param2");

3.向上一个Activity返回结果（使用setResult，针对

startActivityForResult(it,REQUEST_CODE)启动的Activity）

Intent intent=getIntent();

Bundle bundle2=new Bundle();

bundle2.putString("name", "This is from ShowMsg!");

intent.putExtras(bundle2);

setResult(RESULT_OK, intent);

4.回调上一个Activity的结果处理函数（onActivityResult）

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

// TODO Auto-generated method stub

super.onActivityResult(requestCode, resultCode, data);

if (requestCode==REQUEST_CODE){

if(resultCode==RESULT_CANCELED)

setTitle("cancle");

else if (resultCode==RESULT_OK) {

String temp=null;

Bundle bundle=data.getExtras();

if(bundle!=null) temp=bundle.getString("name");

setTitle(temp);

}

注意：
总结：调用startActivityForResult，onActivityResult无响应的问题 http://blog.sina.com.cn/s/blog_5da93c8f0101gzf5.html
我碰到问题跟这里的不一样，就是在接受返回参数的Activity里面的一些方法，使用了getIntent()来得到Intent,导致还没运行返回参素好的Activity,就已经调用了onActivityResult();
最好不要在非onCreate()方法外使用getIntent()来获取Intent;

我的例子源码：
main.xml

<?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" >

<EditText

android:id="@+id/factorone"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

<TextView

android:id="@+id/symbol"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/symbol" />

<EditText

android:id="@+id/factortwo"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

<Button

android:id="@+id/calculate"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/calculate" />

</LinearLayout>

result.xml

<?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/totalRsult"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/symbol" />

</LinearLayout>

strings.xml

<?xml version="1.0" encoding="utf-8"?>

<string name="hello">Hello World, Android_TwoActivityActivity!</string>

<string name="app_name">Android_TwoActivity</string>

<string name="firstActivity">第一个Activity</string>

<string name="secondActivity">第二个Activity</string>

</resources>

FirstActivity.java

package com.pandy.test;

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;

import android.widget.EditText;

import android.widget.TextView;

public class FirstActivity extends Activity {

private EditText factorOne;

private EditText factorTwo;

private TextView symbol;

private Button calculate;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

factorOne = (EditText) findViewById(R.id.factorone);

factorTwo = (EditText) findViewById(R.id.factortwo);

symbol = (TextView) findViewById(R.id.symbol);

calculate = (Button) findViewById(R.id.calculate);

calculate.setOnClickListener(new MyListener());

}

class MyListener implements OnClickListener {

@Override

public void onClick(View arg0) {

Intent intent = new Intent();

intent.setClass(FirstActivity.this, SecondActivity.class);

intent.putExtra("factorOneStr", factorOne.getText().toString());

intent.putExtra("factorTwoStr", factorTwo.getText().toString());

startActivity(intent);

}

SecondActivity.java

package com.pandy.test;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.widget.TextView;

public class SecondActivity extends Activity {

private TextView resultView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.result);

resultView = (TextView) findViewById(R.id.totalRsult);

Intent intent = getIntent();

String factorOneStr = intent.getStringExtra("factorOneStr");

String factorTwoStr = intent.getStringExtra("factorTwoStr");

int factorOneInt = Integer.parseInt(factorOneStr);

int factorTwoInt = Integer.parseInt(factorTwoStr);

resultView.setText(factorOneInt * factorTwoInt + "");

}

R.java

/* AUTO-GENERATED FILE. DO NOT MODIFY.

* This class was automatically generated by the

* aapt tool from the resource data it found. It

* should not be modified by hand.

package com.pandy.test;

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 calculate=0x7f050003;

public static final int factorone=0x7f050000;

public static final int factortwo=0x7f050002;

public static final int symbol=0x7f050001;

public static final int totalRsult=0x7f050004;

}

public static final class layout {

public static final int main=0x7f030000;

public static final int result=0x7f030001;

}

public static final class string {

public static final int app_name=0x7f040001;

public static final int calculate=0x7f040005;

public static final int firstActivity=0x7f040002;

public static final int hello=0x7f040000;

public static final int secondActivity=0x7f040003;

public static final int symbol=0x7f040004;

}

AndroidManifest.xml
———————————————-

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.pandy.test"

android:versionCode="1"

android:versionName="1.0" >

<application

android:label="@string/app_name" >

<activity

android:name=".FirstActivity"

android:label="@string/firstActivity" >

<intent-filter>

</intent-filter>

</activity>

<activity

android:name=".SecondActivity"

android:label="@string/secondActivity" />

</application>

<uses-sdk android:minSdkVersion="4" />

</manifest>

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两个Activity通过Intent传递数据

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