跳转至

哈哈哈

This 指针

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    //比如
    class A{
        public fun GetThis(){
            return this@A;
        }
    }

获取class

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    //ex
    MainActivity::class.java

关于为什么Android样例没有使用 GetViewByID

链接

跳转页面服务

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    //跳转链接
    startActivity(new Intent(Intent.ACTION_VIEW,Uri.parse("https://demonviglu.world")))
    //跳转Activity
    startActivity(new Intent(MainActivity.this,AnotherActivity::class.java))

    //隐式Intent:如下文xml配置，是MainActivity中跳转到AnotherActivity
    startActivity(new Intent("DemonViglu"))
Manifest.xml :

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    <activity
        android:name=".AnotherActivity"
        android:exported="true"
        android:label="@string/app_name"
        android:theme="@style/Theme.Calender">
        <!--上文的android:exported = true，是指可以导出该配置，外部应用可以通过此内部信息跨应用调用此应用-->
        <!--此乃一个隐式Intent，name类似R.id，只是一个索引器，可以随便写，-->
        <intent-filter>
            <action android:name="DemonViglu" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>

Activity之间通信

EX 
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    class A{
        private void Func(){
            Intent i = new Intent(A.this,B.class);
            i.pushExtra("CustomData",new Data());//Data需继承序列化
            startActivityForResult(i,int requestCode = 0);
        }

        protected override void onActivityResult(int requestCode,int resultCode,Intent data){
            super.onActivityResult(requestCode,resultCode,data);
            string s = data.getString("stringData")
        }
    }

    class B{
        OnCreate(){
            Intent i = getIntent();
            Data d = i.getSerializeExtra("CustomData");
        }

        private void BackToA(){
            Intent i = new Intent();
            i.putExtra("stringData","DemonViglu");
            setResult(int resultCode = 1,i);
            finish();
        }
    }

小信息弹窗

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    Toast.makeText(this,"Try to connect to DemonViglu's World!",Toast.LENGTH_SHORT).show()