启动app的两种方式

public static boolean startApp(Context context, String packageName, String className){
Intent intent = new Intent(); 
PackageManager packageManager = context.getPackageManager(); 
intent = packageManager.getLaunchIntentForPackage(packageName); 
if(null == intent) return false;
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED | Intent.FLAG_ACTIVITY_CLEAR_TOP) ; 
context.startActivity(intent);

return true;

}

public static boolean startApp(Context context, String packageName, String className){

ComponentName componetName = new ComponentName( packageName,  className);  
try { 
Intent intent = new Intent();
intent.putExtra("index", index);
intent.putExtra("result", result);
intent.setComponent(componetName);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent); 
return true;
} catch (Exception e) { 
e.printStackTrace();
       }  
}