Android隐式意图激活组件_激活组件的语句

Android隐式意图激活组件

1.通过清单文件指明：

<action>

<category>

<data>  通过URI描述

<activity android:name=".OtherActivity">
            <intent-filter >
                <action android:name="com.example.zx"/>
                <category android:name="com.example.category.java"/> 
                <category android:name="android.intent.category.DEFAULT"/>
                <data android:scheme="xxx" android:host="www.xxx.com" android:path="/xxx"/>
                <data android:mimeType="image/*"/>
            </intent-filter>            
        </activity>

2.在MainActivity中设置intent的上述三个属性:

Intent intent = new Intent();//隐式意图激活Activity
    	intent.setAction("com.example.zx");
    	intent.addCategory("com.example.category.java");   
    	intent.setDataAndType(Uri.parse("xxx://www.xxx.com/xxx"), "image/jpeg");
    	
    	startActivity(intent);//方法内部为Intent添加了android.intent.category.DEFAULT类别

规律：在没有设置数据参数的前提下，只要Intent中的Action和Category都出现在Intent-Filter中，就能与之匹配，否则匹配是被。

3.附录AndroidManifest.xml  &  IntentActivity.java

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mulactivity"
    android:versionCode="1"
    android:versionName="1.0" >
 
    <uses-sdk
        android:minSdkVersion="19"
        android:targetSdkVersion="19" />
 
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.mulactivity.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        	 <intent-filter >
              <action android:name="com.example.zx"/>
              <category android:name="com.example.category.java"/> 
              <category android:name="android.intent.category.DEFAULT"/>
              <data android:scheme="xxx" android:host="www.xxx.com" android:path="/xxx"/>
              <data android:mimeType="image/*"/>
           </intent-filter>        
        <activity
            android:name="com.example.mulactivity.OtherActivity"
            android:label="@string/title"
           />
            
    </application>
 
</manifest>

IntentActivity.java

public class IntentActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    
    public void openActivity(View v){
    	Intent intent = new Intent();//隐式意图激活Activity
    	intent.setAction("com.example.zx");
    	intent.addCategory("com.example.category.java");   
    	intent.setDataAndType(Uri.parse("xxx://www.xxx.com/xxx"), "image/jpeg");
    	
    	startActivity(intent);//方法内部为Intent添加了android.intent.category.DEFAULT类别
    }
}