编程回忆之Android回忆（Android应用参数的获取）

最新推荐文章于 2021-11-16 10:47:18 发布

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最新推荐文章于 2021-11-16 10:47:18 发布

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分类专栏： Android 文章标签： android android应用 app 应用参数

本文链接：https://blog.youkuaiyun.com/stoppig/article/details/21409991

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本文介绍了一种在Android应用中获取关键参数的方法，包括获取当前进程名称、检测应用程序是否处于前台、判断应用程序是否已安装等实用功能。这些方法有助于开发者更好地理解和管理Android应用的运行状态。

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Android应用参数的获取

package com.prtsdkapp;

import java.lang.ref.WeakReference;
import java.util.List;

import android.app.ActivityManager;
import android.app.ActivityManager.RunningAppProcessInfo;
import android.app.ActivityManager.RunningTaskInfo;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.util.Log;

public class getContextParm {
	private static final String TAG = "ContextMgr";

	/**
	 * 两个进程要共用sharedPreferences文件，则context要一样
	 * @param context
	 * @return
	 */
	public static Context getContext(Context context, String appPackageName) {
		// String packageName = "com.anyfish.app";
		WeakReference<Context> mContext = new WeakReference<Context>(context);
		Context con = mContext.get();
		try {
			Context contextApp = mContext.get().createPackageContext(
					appPackageName, 0);
			con = contextApp;

		} catch (NameNotFoundException e) {
			e.printStackTrace();
		}
		return con;
	}

	/**
	 * 获取当前进程名称
	 * @param context
	 * @return
	 */
	public static String getCurProcessName(Context context) {
		Log.d(TAG, "getCurProcessName");
		int pid = android.os.Process.myPid();
		ActivityManager mActivityManager = (ActivityManager) context
				.getSystemService(Context.ACTIVITY_SERVICE);
		for (ActivityManager.RunningAppProcessInfo appProcess : mActivityManager
				.getRunningAppProcesses()) {
			if (appProcess.pid == pid) {
				Log.d(TAG, "getCurProcessName:" + appProcess.processName);
				return appProcess.processName;
			}
		}
		return null;
	}

	/**
	 * 获取sdk版本号
	 * @return
	 */
	public static int getSDKVersionNumber() {
		int sdkVersion;
		try {
			sdkVersion = Integer.valueOf(android.os.Build.VERSION.SDK);
		} catch (NumberFormatException e) {
			sdkVersion = 0;
		}
		return sdkVersion;
	}

	/**
	 * 检测当前packageName程序是否属于前台程序
	 * 
	 * @param app
	 * @param appPackageName
	 * @return
	 */
	public static boolean isTopActivity(Context context, String appPackageName) {
		ActivityManager activityManager = (ActivityManager) context
				.getSystemService(Context.ACTIVITY_SERVICE);
		List<RunningTaskInfo> tasksInfo = activityManager.getRunningTasks(1);

		if (tasksInfo.size() > 0) {
			if (tasksInfo.get(0).topActivity.getPackageName().contains(
					appPackageName)) {
				return true;
			}
		}
		return false;
	}

	/**
	 * 判断当前packageName程序是否切换到后台了
	 * @param app
	 * @param appPackageName
	 * @return
	 */
	public static boolean isBackgroundActivity(Context context,
			String appPackageName) {
		if (isTopActivity(context, appPackageName)) {
			return false;
		}
		ActivityManager am = (ActivityManager) context
				.getSystemService(Context.ACTIVITY_SERVICE);
		List<RunningAppProcessInfo> run = am.getRunningAppProcesses();
		for (RunningAppProcessInfo ra : run) {
			if (ra.processName.contains(appPackageName)
					&& !ra.processName.contains(appPackageName + ":")) {
				return true;
			}
		}
		return false;
	}

	/**
	 * 判断程序是否安装
	 * @param context
	 * @return
	 */
	public static boolean isAppInstalled(Context context, String packageName) {
		Log.d(TAG, "isAppInstalled");

		PackageManager mPackageManager = context.getPackageManager();

		if (mPackageManager == null) {
			return false;
		}

		List<PackageInfo> pkgs = mPackageManager
				.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);

		boolean installed = false;
		for (PackageInfo info : pkgs) {
			if (info.packageName.equals(packageName)) {
				installed = true;
				break;
			}
		}

		return installed;
	}

}