Android 隐性Intent的例子，androidintent例子,Android的Inte

Android 隐性Intent的例子，androidintent例子,Android的Inte

Android的Intent分为两大类，显性的(Explicit)的和隐性的(Implicit)。显性的很简单就是我们常用的Activit跳转，他指明了从一个Activity跳转到另一个。在SecondActivity这个配置中有一个intent-filter，其中它定义了action的名称。所谓的隐性Intent就是靠这个action的名称来传递。代码如下：

显式

Intent i = new Intent(this,AnotherActivity.class);startActivity(i);

Main.java

import android.app.Activity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;public class Main extends Activity {private final String mapSearchIntent = "com.decarta.mapsearch.intent.action.SEARCH";/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);Uri mapUri = Uri.parse("geo:39.906033,116.397700");Intent i = new Intent(mapSearchIntent, mapUri);i.setData(mapUri);startActivity(i);}}

SecondActivity.java

import android.app.Activity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;/*** @author Tony Shen*/public class SecondActivity extends Activity{private Uri data;private String action;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Intent intent = getIntent();if (intent.getAction() != null)action = intent.getAction();if (intent.getData()!=null)data = intent.getData();if (action.equals("com.decarta.mapsearch.intent.action.SEARCH")) {Intent i = new Intent(Intent.ACTION_VIEW, data);startActivity(i);}}}

[XML]代码

<application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".Main" 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=".SecondActivity"> <intent-filter> <action android:name="com.decarta.mapsearch.intent.action.SEARCH" /> <category android:name="android.intent.category.DEFAULT" /> <data android:scheme="geo" /> </intent-filter> </activity> </application> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".Main" 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=".SecondActivity"> <intent-filter> <action android:name="com.decarta.mapsearch.intent.action.SEARCH" /> <category android:name="android.intent.category.DEFAULT" /><data android:scheme="geo" /> </intent-filter> </activity> </application>