Java tutorial
//package com.java2s; import android.app.Activity; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; public class Main { private static final String WX_PACKAGE_NAME = "com.tencent.mm"; public static boolean hasInstalledWx(Activity activity) { try { PackageManager manager = activity.getPackageManager(); PackageInfo info = manager.getPackageInfo(WX_PACKAGE_NAME, PackageManager.GET_ACTIVITIES); if (info != null) { return true; } } catch (Exception e) { e.printStackTrace(); } return false; } }