啓動Activity前檢測

-1

Intent intent = new Intent(xxxxx);
// Check if an Activity exists to perform this action.
PackageManager pm = context.getPackageManager();
ComponentName cn = intent.resolveActivity(pm);
if(cn!=null){
context.startActivity(intent);
}

-2

intent.setComponent(new ComponentName("com.wind.emode",
                                                            "com.wind.emode.testcase.SalesCountStatus"));
if(context.getPackageManager().resolveActivity(intent,0)!=null){
context.startActivity(intent);
}