Android 启动第三方APP

// 通过包名获取要跳转的app，创建intent对象 

Intent intent =getPackageManager().getLaunchIntentForPackage( String packname);
if (intent!=null ){
                startActivity(intent);
}

/**
* 启动第三方 app

* @param mcontext
* @param packagename
*/
public static void doStartApplicationWithPackageName (Context mcontext, String packagename) {

     // 通过包名获取此 APP 详细信息，包括 Activities、 services 、versioncode 、 name等等 
            PackageInfo packageinfo = null;
     try { 
           packageinfo = mcontext.getPackageManager().getPackageInfo(packagename, 0 ); 
     } catch (PackageManager.NameNotFoundException e) {
           e.printStackTrace() ;
     } 
     if (packageinfo == null) { 
           return; 
     } 

     // 创建一个类别为 CATEGORY_LAUNCHER 的该包名的 Intent
     Intent resolveIntent = new Intent(Intent. ACTION_MAIN, null) ;
     resolveIntent.setFlags(Intent. FLAG_ACTIVITY_NEW_TASK ) ;
     resolveIntent.addCategory(Intent. CATEGORY_LAUNCHER ); 
     resolveIntent.setPackage(packageinfo. packageName ); 

     // 通过 getPackageManager()的 queryIntentActivities 方法遍历
            List<ResolveInfo> resolveinfoList = mcontext.getPackageManager()
                .queryIntentActivities(resolveIntent , 0) ;

     ResolveInfo resolveinfo = resolveinfoList.iterator().next(); 
     if (resolveinfo != null ) {
           // packagename = 参数 packname
           String packageName = resolveinfo.activityInfo . packageName; 
           // 这个就是我们要找的该 APP 的LAUNCHER 的 Activity[组织形式： packagename.mainActivityname]
           String className = resolveinfo. activityInfo .name ;
           // LAUNCHER Intent 
           Intent intent = new Intent(Intent. ACTION_MAIN) ;
           intent.setFlags(Intent. FLAG_ACTIVITY_NEW_TASK ) ;
           intent.addCategory(Intent. CATEGORY_LAUNCHER ); 

           // 设置 ComponentName参数 1:packagename 参数2:MainActivity 路径
                         ComponentName cn = new ComponentName(packageName , className) ;

           intent.setComponent(cn) ;
           mcontext.startActivity(intent) ;
     } 
}

Android 启动第三方APP

原文：http://my.oschina.net/leov1/blog/524345