openOtherAPP

转载地址：http://hunankeda110.iteye.com/blog/1960444
* 启动另外一个程序*

第一种方式知道包名和类名： Intent intent = new Intent(); intent.setAction(Intent.ACTION_MAIN); intent.addCategory(Intent.CATEGORY_LAUNCHER);    設置包名兩種方式    1、 PackageManager pm=this.getPackageManager();     intent= pm.getLaunchIntentForPackage("pad.android.marketing.gps");     intent.setFlags              (Intent.FLAG_ACTIVITY_NEW_TASKIntent.FLAG_ACTIVITY_RESET_TASK_IF_NEED     ED);    2、ComponentName cm = new ComponentName("pad.android.marketing.gps", "pad.android.marketing.gps.MainActivity");      intent.setComponent(cm);      startActivity(intent);第二种启动不知道类名的，包名需要从设备查找。    Intent intent1 = new Intent();    intent1.setAction(Intent.ACTION_MAIN);    intent1.addCategory(Intent.CATEGORY_LAUNCHER);    //包管理器    PackageManager pm = context.getPackageManager();    //已经安装的app信息集合    List<ApplicationInfo> appList = pm.getInstalledApplications(0);    for (int i = 0; i < appList.size(); i++) {        Log.e("TAG", "appinfo: " + appList.get(i));    }    //包信息实例化    PackageInfo packageInfo = null;    try {        //指定包的信息        packageInfo = pm.getPackageInfo("pad.android.marketing.gps", 0);    } catch (PackageManager.NameNotFoundException e) {        e.printStackTrace();    }    //指定app进入界面activity。    Intent intent = new Intent(Intent.ACTION_MAIN, null);    intent.addCategory(Intent.CATEGORY_LAUNCHER);    intent.setPackage(packageInfo.packageName);    //查找指定包中activity信息    List<ResolveInfo> infoList = pm.queryIntentActivities(intent, 0);    ResolveInfo ri = infoList.iterator().next();    if (ri != null) {        //启动activity的名字        String classname = ri.activityInfo.name;        Log.e("TAG", "class " +classname );    }    ComponentName cn = new ComponentName("pad.android.marketing.gps", className);    intent1.setComponent(cn);    startActivity(intent1);