安卓学习-Intent

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.zzzzzzzzz"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".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>
        <activity
            android:name=".Activity2"
            android:label="@string/title_activity_activity2" >
            <intent-filter >
                <action android:name="aaaaaaaaaaa"/>
                <action android:name="bbbbbbbbbbbbbb"/>
                <category android:name="android.intent.category.DEFAULT"/>
                <category android:name="ccc"/> 
            </intent-filter>
        </activity>
    </application>

</manifest>

        Button btn=(Button)findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                Intent intent=new Intent();
                intent.setAction("aaaaaaaaaaa");
                intent.addCategory("ccc");
                startActivity(intent);
            }
        });

        TextView v1=(TextView)findViewById(R.id.textView1);
        TextView v2=(TextView)findViewById(R.id.textView2);
        v1.setText("active:"+getIntent().getAction());
        Set<String> sets=getIntent().getCategories();
        v2.setText("category:"+sets+"");