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:
[url]http://www.cnblogs.com/feisky/archive/2010/01/16/1649081.html
[/url]
1.无参数Activity跳转
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：
Bundle bundle=getIntent().getExtras();String name=bundle.getString("name");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); } } }我的例子源码：
main.xml
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<?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
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<?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
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<?xml version="1.0" encoding="utf-8"?><resources> <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> <string name="symbol">乘以</string> <string name="calculate">计算</string></resources>
FirstActivity.java
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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;@Overridepublic 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 {@Overridepublic 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
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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;@Overrideprotected 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
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/* 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
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<?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> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".SecondActivity" android:label="@string/secondActivity" /> </application> <uses-sdk android:minSdkVersion="4" /></manifest>