获取友盟渠道号

一、设置渠道号，例如:

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>

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

<meta-data
android:name="UMENG_CHANNEL"
android:value="baidusb"/>

</application>

二、获取

/**
* 获取友盟渠道名
*
* @param ctx 此处习惯性的设置为activity，实际上context就可以
* @return 如果没有获取成功，那么返回值为空
*/
public static String getChannelName(Activity ctx) {
if (ctx == null) {
return null;
}
String channelName = null;
try {
PackageManager packageManager = ctx.getPackageManager();
if (packageManager != null) {
//注意此处为ApplicationInfo 而不是 ActivityInfo,因为友盟设置的meta-data是在application标签中，而不是某activity标签中，所以用ApplicationInfo
ApplicationInfo applicationInfo = packageManager.getApplicationInfo(ctx.getPackageName(), PackageManager.GET_META_DATA);
if (applicationInfo != null) {
if (applicationInfo.metaData != null) {
//此处这样写的目的是为了在debug模式下也能获取到渠道号，如果用getString的话只能在Release下获取到。
channelName = applicationInfo.metaData.get("UMENG_CHANNEL") + "";
}
}

}
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return channelName;
}

/**
* 获取application中指定的meta-data
*
* @return 如果没有获取成功(没有对应值，或者异常)，则返回值为空
*/
public static String getAppMetaData(Context ctx, String key) {
if (ctx == null || TextUtils.isEmpty(key)) {
return null;
}
String resultData = null;
try {
PackageManager packageManager = ctx.getPackageManager();
if (packageManager != null) {
ApplicationInfo applicationInfo = packageManager.getApplicationInfo(ctx.getPackageName(), PackageManager.GET_META_DATA);
if (applicationInfo != null) {
if (applicationInfo.metaData != null) {
resultData = applicationInfo.metaData.get(key) + "";
}
}

}
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}

return resultData;
}

三、结果