Android创建自定义Application
开发目的
- 创建一个自定义的MainApplication继承Application。
- 读取AndroidManifest.xml文件中Application节点的META-DATA数据。此处以ApiKey为假想数据。
实现代码
MainApplication.java文件
package com.irisleon.application;
import android.app.Application;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.util.Log;
public class MainApplication extends Application {
private static final String TAG = "MainApplication";
private static String mApiKey = null;
@Override
public void onCreate() {
super.onCreate();
try {
// 获得Application节点的META-DATA信息
ApplicationInfo info = getPackageManager().getApplicationInfo(getPackageName(), PackageManager.GET_META_DATA);
mApiKey = info.metaData.getString("ApiKey");
if (mApiKey == null || "".equals(mApiKey)) {
Log.e(TAG, "Can NOT find value of ApiKey in Manifest.xml!");
}
else {
Log.i(TAG, "ApiKey Loaded!");
}
}
catch (PackageManager.NameNotFoundException exception) {
Log.e(TAG, "Can NOT find value of ApiKey in Manifest.xml!");
}
}
public static String getApiKey() {
if (mApiKey == null) {
mApiKey = "";
}
return mApiKey;
}
}
AndroidManifest.xml文件
增加android:name属性,设定为MainApplication的类名
原文:https://www.cnblogs.com/smartcore/p/14638201.html