Question

我的问题是：

我使用finish()关闭活动，转到 onPause - ＆gt; onStop - ＆gt;的onDestroy 即可。接下来，我打开应用，onCreate()获取所有视图和context的旧引用。

当我尝试显示简单对话框时，它会抛出：

＆＃34;无法添加窗口 - 令牌android.os.BinderProxy@69a156a不是有效;你的活动在运行吗？＆＃34;

我也无法访问文字视图

progressText？.text = message

它获得旧参考 - 我使用了clearFindViewByIdCache（） - 但没有效果。

出了什么问题？

修改

我尝试使用DataSyncListener方法runOnUiThread

来操作视图

class MainActivity : AppCompatActivity(), DataSyncListener {
override fun onSuccess() {
    runOnUiThread {
        refreshLayout?.isRefreshing = false // it DO NOT works after reopen app, 
        syncProgressText?.visibility = View.GONE // it DO NOT works after reopen app, 
    }
}

override fun onFailure() {
    runOnUiThread {
        refreshLayout?.isRefreshing = false // it DO NOT works after reopen app, 
        syncProgressText?.visibility = View.GONE // it DO NOT works after reopen app, 
    }
}

override fun onError(message: String) {
    Logger.d(message)
    runOnUiThread {
        refreshLayout?.isRefreshing = false        // it DO NOT works after reopen app
        syncProgressText?.visibility = View.GONE   // it DO NOT works after reopen app

        displayInfoAlertWithConfirm(this@MainActivity, message, DialogInterface.OnClickListener { _, _ ->   // it DO NOT works after reopen app, throws Unable to add window
            refreshLayout?.isRefreshing = true            // it DO NOT works after reopen app
            syncProgressText?.visibility = View.VISIBLE   // it DO NOT works after reopen app
        })
    }
}

override fun onProgress(message: String) {
    runOnUiThread {
        syncProgressText?.text = message    // it DO NOT works after reopen app
    }
}


override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    setSupportActionBar(toolbar)
    refreshLayout.setOnRefreshListener({ 
        // it DO NOT works after reopen app, 
        synchronizeData() 
        })

    synchronizeData()
    syncProgressText?.text = "test" // it works after reopen app
}

override fun onPostCreate(savedInstanceState: Bundle?, persistentState: PersistableBundle?) {
    super.onPostCreate(savedInstanceState, persistentState)
    actionBarDrawerToggle?.syncState()
}


fun synchronizeData() {
    refreshLayout?.isRefreshing = true

    dataSynchronizer = DataSynchronizer.getInstance(application as MyApplication?, this)
    dataSynchronizer?.startSync()                   // background featch data
    syncProgressText?.visibility = View.VISIBLE   // it DO NOT works after reopen app
}


override fun onDestroy() {
    super.onDestroy()
    dataSynchronizer?.stopSync()    // kill background task
    clearFindViewByIdCache() // no effect
}

}

EDIT2

FIXED - DataSynchronizer不是GC并保留旧引用

Answer 1

使用syncProgressText.setText（message），syncProgressText.text需要Editable，而不是String。

Answer 2

最后修复。感谢@Viktor，在检查了我的DataSynchronizer.getInstance（应用程序为MyApplication？，这个）后，我意识到DataSynchronizer不是GC - 内存泄漏。所以它坚持旧的反思。现在它就像一个魅力。

Android / Kotlin - 关闭后恢复应用时获取旧活动

2 个答案: