生活随笔
收集整理的這篇文章主要介紹了
Android Bundle类,通过bundle实现在两个activity之间的通讯
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根據(jù)google官方的文檔（http://developer.android.com/reference/android/os/Bundle.html）
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Bundle類是一個(gè)key-value對(duì)，“A mapping from String values to various Parcelable types.”
類繼承關(guān)系：
java.lang.Object
? ? ?android.os.Bundle
Bundle類是一個(gè)final類：
public final class
Bundle
extends Objectimplements Parcelable Cloneable
兩個(gè)activity之間的通訊可以通過bundle類來實(shí)現(xiàn)，做法就是：
（1）新建一個(gè)bundle類
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Bundle?mBundle?=?new?Bundle();??? （2）bundle類中加入數(shù)據(jù)（key -value的形式，另一個(gè)activity里面取數(shù)據(jù)的時(shí)候，就要用到key，找出對(duì)應(yīng)的value）
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mBundle.putString("Data",?"data?from?TestBundle");??
(3)新建一個(gè)intent對(duì)象，并將該bundle加入這個(gè)intent對(duì)象
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Intent?intent?=?new?Intent();????intent.setClass(TestBundle.this,?Target.class);????intent.putExtras(mBundle);?? 完整代碼如下：
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android mainfest.xml如下：
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<?xml?version="1.0"?encoding="utf-8"?>??<manifest?xmlns:android="http://schemas.android.com/apk/res/android"????????package="com.tencent.test"????????android:versionCode="1"????????android:versionName="1.0">??????<application?android:icon="@drawable/icon"?android:label="@string/app_name">??????????<activity?android:name=".TestBundle"????????????????????android:label="@string/app_name">??????????????<intent-filter>??????????????????<action?android:name="android.intent.action.MAIN"?/>??????????????????<category?android:name="android.intent.category.LAUNCHER"?/>??????????????</intent-filter>??????????</activity>??????<activity?android:name=".Target"></activity>??????</application>??????<uses-sdk?android:minSdkVersion="7"?/>??</manifest>???
兩個(gè)類如下：intent從TestBundle類發(fā)起，到Target類。
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類1：TestBundle類：
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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?TestBundle?extends?Activity?{??????????????private?Button?button1;??????private?OnClickListener?cl;???????public?void?onCreate(Bundle?savedInstanceState)?{????????????super.onCreate(savedInstanceState);????????????setContentView(R.layout.main);????????????????????button1?=?(Button)?findViewById(R.id.button1);??????????cl?=?new?OnClickListener(){??????????????@Override??????????????public?void?onClick(View?arg0)?{??????????????????????????????????Intent?intent?=?new?Intent();????????????????????intent.setClass(TestBundle.this,?Target.class);????????????????????Bundle?mBundle?=?new?Bundle();????????????????????mBundle.putString("Data",?"data?from?TestBundle");????????????????intent.putExtras(mBundle);????????????????????startActivity(intent);??????????????}??????????};??????????button1.setOnClickListener(cl);??????}??}????
類2： Target
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import?android.app.Activity;????import?android.os.Bundle;??????public?class?Target?extends?Activity{??????????public?void?onCreate(Bundle?savedInstanceState)?{??????????????????????super.onCreate(savedInstanceState);????????????setContentView(R.layout.target);????????????<span?style="color:#ff6600;">Bundle?bundle?=?getIntent().getExtras();???</span>?????????String?data?=?bundle.getString("Data");????????setTitle(data);??????????}????}????
布局文件：
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main.xml
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<?xml?version="1.0"?encoding="utf-8"?>??<LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"??????android:orientation="vertical"??????android:layout_width="fill_parent"??????android:layout_height="fill_parent"??????>??<TextView????????android:layout_width="fill_parent"???????android:layout_height="wrap_content"???????android:text="@string/hello"??????/>??<Button????????android:layout_width="fill_parent"???????android:layout_height="wrap_content"???????android:text="@string/button"??????android:id?=?"@+id/button1"??????/>???</LinearLayout>?? ?
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target.xml
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<?xml?version="1.0"?encoding="utf-8"?>??<LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"??????android:orientation="vertical"??????android:layout_width="fill_parent"??????android:layout_height="fill_parent"??????>??<TextView????????android:layout_width="fill_parent"???????android:layout_height="wrap_content"???????android:text="@string/target"??????/>??</LinearLayout>?? ?
String.xml
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<?xml?version="1.0"?encoding="utf-8"?>??<resources>??????<string?name="hello">Hello?World,?TestBundle!</string>??????<string?name="app_name">測(cè)試Bundle用法</string>??????<string?name="button">點(diǎn)擊跳轉(zhuǎn)</string>??????<string?name="target">來到target?activity</string>??</resources>??
結(jié)果：
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跳轉(zhuǎn)結(jié)果：
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http://blog.csdn.net/randyjiawenjie/article/details/6651437
轉(zhuǎn)載于:https://www.cnblogs.com/xlchen/p/4215488.html
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