封装一个koltin版的BaseActivity(包含viewBinding)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
abstract class BaseActivity<VM : BaseViewModel,VB : ViewBinding> : AppCompatActivity() {
    protected lateinit var viewModel: VM
     lateinit var binding: VB
    var context: Context? = null


    //初始化布局
    abstract fun initView(savedInstanceState: Bundle?)
    abstract fun initData()


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        initViewBinding()
        
        //初始化上下文
        context = application
        //初始化控件
        initView(savedInstanceState)
        //初始化数据
        initData()
    }

    private fun initViewBinding() {
        binding = inflateBinding()
        setContentView(binding.root)
        createViewModel()
    }
    protected abstract fun inflateBinding(): VB


    //页面跳转
    open fun activityStart(ctx: Context, clazz: Class<Any>) {
        var intent = Intent()
        intent.setClass(ctx, clazz)
        startActivity(intent)
        overridePendingTransition(0, 0)
    }

    protected open fun viewModelFactory(): ViewModelProvider.Factory = ViewModelFactory()
    /**
     * 创建 ViewModel
     */
    @Suppress("UNCHECKED_CAST")
    private fun createViewModel() {
        val type = javaClass.genericSuperclass
        if (type is ParameterizedType) {
            val tp = type.actualTypeArguments[0]
            val tClass = tp as? Class<VM> ?: BaseViewModel::class.java
            viewModel = ViewModelProvider(this, viewModelFactory()).get(tClass) as VM
        }
    }

}

1
2