Android应用开发之MetaData之数据挖掘

1案例技术要点（待整理）

2案例代码陈列

2.1AndroidManifest.xml

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

<uses-sdk android:minSdkVersion="8" />

<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".MetaDataMainActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>

<meta-data android:name="cn.lynn.name" android:value="lynn1229"/>
<meta-data android:name="cn.lynn.age" android:value="25"/>
<meta-data android:name="cn.lynn.app" android:value="@string/app_name"/>
<meta-data android:name="cn.lynn.id" android:resource="@string/app_name"/>
</activity>
</application>

</manifest>

2.2strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Activity的MetaData元数据使用</string>
</resources>

2.3main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/app_name" />

</LinearLayout>

2.4MetaDataMainActivity.java

package cn.lynn.metadata;

import android.app.Activity;
import android.content.ComponentName;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Bundle;
import android.widget.Toast;

public class MetaDataMainActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

try {
ActivityInfo activityInfo = this.getPackageManager().getActivityInfo(new ComponentName(this, MetaDataMainActivity.class), PackageManager.GET_META_DATA);
Bundle bundle = activityInfo.metaData;
String name = bundle.getString("cn.lynn.name");
String app = bundle.getString("cn.lynn.app");
int age = bundle.getInt("cn.lynn.age");
int sourceid = bundle.getInt("cn.lynn.id");

Toast.makeText(this, "name= " + name + ", age=" + age + ", app= " + app + ", sourceid= " + sourceid, Toast.LENGTH_LONG).show();
} catch (NameNotFoundException e) {
e.printStackTrace();
}
}
}

3案例效果展示