Android 检测系统是否安装微信，微博，QQ

/**
* 检测是否安装微信
*
* @param context
* @return
*/
public static boolean isWxInstall(Context context) {
final PackageManager packageManager = context.getPackageManager();// 获取packagemanager
List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);// 获取所有已安装程序的包信息
if (pinfo != null) {
for (int i = 0; i < pinfo.size(); i++) {
String pn = pinfo.get(i).packageName;
if (pn.equals("com.tencent.mm")) {
return true;
}
}
}

return false;
}

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