Android kotlin LoaderManager LoaderCallbacks AsyncTaskLoader（1）

拼搏现实的明天。 2023-09-25 23:52 64阅读 0赞

## Android LoaderManager LoaderCallbacks AsyncTaskLoader，kotlin（1） ##

##  ##

import android.content.Context
    import androidx.appcompat.app.AppCompatActivity
    import android.os.Bundle
    import android.util.Log
    import androidx.loader.app.LoaderManager
    import androidx.loader.content.AsyncTaskLoader
    import androidx.loader.content.Loader
    
    
    class MainActivity : AppCompatActivity() {
        companion object {
            private val TAG = "fly"
        }
    
        private var loaderManager: LoaderManager? = null
    
        override fun onCreate(savedInstanceState: Bundle?) {
            super.onCreate(savedInstanceState)
            loaderManager = LoaderManager.getInstance(this)
            loaderManager?.initLoader(2023, Bundle(), callback)
        }
    
        val callback = object : LoaderManager.LoaderCallbacks<String> {
            override fun onCreateLoader(id: Int, args: Bundle?): MyLoader {
                return MyLoader(applicationContext)
            }
    
            override fun onLoaderReset(loader: Loader<String>) {
    
            }
    
            override fun onLoadFinished(loader: Loader<String>, data: String?) {
                Log.d(TAG, "onLoadFinished")
            }
        }
    
        class MyLoader(context: Context) : AsyncTaskLoader<String>(context) {
            override fun onStartLoading() {
                forceLoad()
            }
    
            override fun loadInBackground(): String {
                var s = ""
                s = s.let {
                    "fly"
                }
    
                Log.d(TAG, "loadInBackground $s")
    
                return s
            }
    
            override fun deliverResult(data: String?) {
                Log.d(TAG, "deliverResult $data")
            }
    
            override fun onStopLoading() {
                Log.d(TAG, "onStopLoading")
            }
        }
    }

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