1.
Intent intent = getPackageManager().getLaunchIntentForPackage("com.xxx.yyyy");
if(intent!=null){
startActivity(intent);
}else{
Toast.makeText(this,"didnt find com.sogou.baby",Toast.LENGTH_SHORT).show();
}
2.
try{
Intent intent =newIntent();
ComponentName componentName =newComponentName("com.xxx.yyy","com.xxx.yyy.activities.LoginActivity");
intent.setComponent(componentName);
startActivity(intent);
}catch(Exception e) {
Toast.makeText(this,"didnt find com.sogou.baby",Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
注意：LoginActivity需要配置为android :exported = true；否则打不开
