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：
[代码] 显式
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Intent i = new Intent(this,AnotherActivity.class);
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startActivity(i);
[代码] Main.java
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import android.app.Activity;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Bundle;
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public class Main extends Activity {
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private final String mapSearchIntent = "com.decarta.mapsearch.intent.action.SEARCH";
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/** Called when the activity is first created. */
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.main);
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Uri mapUri = Uri.parse("geo:39.906033,116.397700");
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Intent i = new Intent(mapSearchIntent, mapUri);
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i.setData(mapUri);
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startActivity(i);
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}
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}
[代码] SecondActivity.java
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import android.app.Activity;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Bundle;
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/**
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* @author Tony Shen
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*/
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public class SecondActivity extends Activity{
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private Uri data;
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private String action;
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/** Called when the activity is first created. */
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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Intent intent = getIntent();
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if (intent.getAction() != null)
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action = intent.getAction();
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if (intent.getData()!=null)
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data = intent.getData();
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if (action.equals("com.decarta.mapsearch.intent.action.SEARCH")) {
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Intent i = new Intent(Intent.ACTION_VIEW, data);
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startActivity(i);
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}
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}
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}
[代码] [XML]代码
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<application android:icon="@drawable/icon" android:label="@string/app_name">
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<activity android:name=".Main" android:label="@string/app_name">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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<activity android:name=".SecondActivity">
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<intent-filter>
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<action android:name="com.decarta.mapsearch.intent.action.SEARCH" />
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<category android:name="android.intent.category.DEFAULT" />
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<data android:scheme="geo" />
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</intent-filter>
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</activity>
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</application>
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<application android:icon="@drawable/icon" android:label="@string/app_name">
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<activity android:name=".Main" android:label="@string/app_name">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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<activity android:name=".SecondActivity">
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<intent-filter>
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<action android:name="com.decarta.mapsearch.intent.action.SEARCH" />
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<category android:name="android.intent.category.DEFAULT" />
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<data android:scheme="geo" />
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</intent-filter>
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</activity>
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</application>
