过时修正举例 (Kotlin):

getColor():

    resources.getColor(R.color.white) //已过时// 修正后:ContextCompat.getColor(this, R.color.white)

 getDrawable():

    resources.getDrawable(R.mipmap.test)    //已过时//修正后:ContextCompat.getDrawable(this, R.mipmap.test)    //this = Context

setCompoundDrawables():        //未过时但不建议使用

    view?.setCompoundDrawables(null,null,null,null)  //未过时但不建议使用//修正后:view?.setCompoundDrawablesWithIntrinsicBounds(null, null, null, null)

BluetoothAdapter.getDefaultAdapter().isEnabled:        //获取蓝牙开关状态

    if (!BluetoothAdapter.getDefaultAdapter().isEnabled) {    //已过时//打开蓝牙开关activity?.startActivity(Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE))}//修正后:if (!((activity?.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager).adapter.isEnabled)) {//打开蓝牙开关activity?.startActivity(Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE))}

requestWindowFeature(Window.FEATURE_NO_TITLE):        //去除Activity默认头部

    //当Activity继承FragmentActivity时使用:requestWindowFeature(Window.FEATURE_NO_TITLE)     //当Activity继承AppCompatActivity时使用:supportRequestWindowFeature(Window.FEATURE_NO_TITLE)