Question

我正在尝试在同一布局上初始化（或填充，如果愿意的话）两个微调器。我正在模仿在其他示例中看到的代码，并且初始化在调试器中可以正常进行，但是有时在之后-以及在微调器的布局出现在我的Android设备（我的手机）上之前-该应用程序崩溃并显示堆栈跟踪，该跟踪无法识别我的应用程序中的任何代码行。我试图找出问题出在我的应用程序中。这是Logcat的相关代码行。我正在运行Android Studio 3.1.3。

07-19 21：31：14.821 30262-30262 / com.example.android.twlistsales E / ArrayAdapter：您必须提供TextView的资源ID 07-19 21：31：14.822 30262-30262 / com.example.android.twlistsales D / AndroidRuntime：关闭VM 07-19 21：31：14.838 30262-30262 / com.example.android.twlistsales E / AndroidRuntime：FATAL EXCEPTION：main 流程：com.example.android.twlistsales，PID：30262 java.lang.IllegalStateException：ArrayAdapter要求资源ID为TextView 在android.widget.ArrayAdapter.createViewFromResource（ArrayAdapter.java:401）在android.widget.ArrayAdapter.getView（ArrayAdapter.java:371）在android.widget.AbsSpinner.onMeasure（AbsSpinner.java:195）在android.widget.Spinner.onMeasure（Spinner.java:662）在android.support.v7.widget.AppCompatSpinner.onMeasure（AppCompatSpinner.java:420）在android.view.View.measure（View.java:21125）在android.support.constraint.ConstraintLayout.internalMeasureChildren（ConstraintLayout.java:1212）在android.support.constraint.ConstraintLayout.onMeasure（ConstraintLayout.java:1552）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在android.support.v7.widget.ContentFrameLayout.onMeasure（ContentFrameLayout.java:141）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1464）在android.widget.LinearLayout.measureVertical（LinearLayout.java:758）在android.widget.LinearLayout.onMeasure（LinearLayout.java:640）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1464）在android.widget.LinearLayout.measureVertical（LinearLayout.java:758）在android.widget.LinearLayout.onMeasure（LinearLayout.java:640）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在com.android.internal.policy.DecorView.onMeasure（DecorView.java:896）在android.view.View.measure（View.java:21125）在android.view.ViewRootImpl.performMeasure（ViewRootImpl.java:2612）在android.view.ViewRootImpl.measureHierarchy（ViewRootImpl.java:1664）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1915）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1537）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:7183）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:959）在android.view.Choreographer.doCallbacks（Choreographer.java:734）在android.view.Choreographer.doFrame（Choreographer.java:670）在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:945）在android.os.Handler.handleCallback（Handler.java:751）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6776）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1518）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1408）造成原因：java.lang.ClassCastException：android.support.constraint.ConstraintLayout无法强制转换为android.widget.TextView 在android.widget.ArrayAdapter.createViewFromResource（ArrayAdapter.java:388）在android.widget.ArrayAdapter.getView（ArrayAdapter.java:371）在android.widget.AbsSpinner.onMeasure（AbsSpinner.java:195）在android.widget.Spinner.onMeasure（Spinner.java:662）在android.support.v7.widget.AppCompatSpinner.onMeasure（AppCompatSpinner.java:420）在android.view.View.measure（View.java:21125）在android.support.constraint.ConstraintLayout.internalMeasureChildren（ConstraintLayout.java:1212）在android.support.constraint.ConstraintLayout.onMeasure（ConstraintLayout.java:1552）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在android.support.v7.widget.ContentFrameLayout.onMeasure（ContentFrameLayout.java:141）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1464）在android.widget.LinearLayout.measureVertical（LinearLayout.java:758）在android.widget.LinearLayout.onMeasure（LinearLayout.java:640）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1464）在android.widget.LinearLayout.measureVertical（LinearLayout.java:758）在android.widget.LinearLayout.onMeasure（LinearLayout.java:640）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在com.android.internal.policy.DecorView.onMeasure（DecorView.java:896）在android.view.View.measure（View.java:21125）在android.view.ViewRootImpl.performMeasure（ViewRootImpl.java:2612）在android.view.ViewRootImpl.measureHierarchy（ViewRootImpl.java:1664）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1915）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1537）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:7183）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:959）在android.view.Choreographer.doCallbacks（Choreographer.java:734）在android.view.Choreographer.doFrame（Choreographer.java:670）在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:945）在android.os.Handler.handleCallback（Handler.java:751）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6776）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1518）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1408）造成原因：java.lang.ClassCastException：android.support.constraint.ConstraintLayout无法强制转换为android.widget.TextView 在android.widget.ArrayAdapter.createViewFromResource（ArrayAdapter.java:388）在android.widget.ArrayAdapter.getView（ArrayAdapter.java:371）在android.widget.AbsSpinner.onMeasure（AbsSpinner.java:195）在android.widget.Spinner.onMeasure（Spinner.java:662）在android.support.v7.widget.AppCompatSpinner.onMeasure（AppCompatSpinner.java:420）在android.view.View.measure（View.java:21125）在android.support.constraint.ConstraintLayout.internalMeasureChildren（ConstraintLayout.java:1212）在android.support.constraint.ConstraintLayout.onMeasure（ConstraintLayout.java:1552）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在android.support.v7.widget.ContentFrameLayout.onMeasure（ContentFrameLayout.java:141）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1464）在android.widget.LinearLayout.measureVertical（LinearLayout.java:758）在android.widget.LinearLayout.onMeasure（LinearLayout.java:640）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1464）在android.widget.LinearLayout.measureVertical（LinearLayout.java:758）在android.widget.LinearLayout.onMeasure（LinearLayout.java:640）在android.view.View.measure（View.java:21125）在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6461）在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）在com.android.internal.policy.DecorView.onMeasure（DecorView.java:896）在android.view.View.measure（View.java:21125）在android.view.ViewRootImpl.performMeasure（ViewRootImpl.java:2612）在android.view.ViewRootImpl.measureHierarchy（ViewRootImpl.java:1664）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1915）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1537）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:7183）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:959）在android.view.Choreographer.doCallbacks（Choreographer.java:734）在android.view.Choreographer.doFrame（Choreographer.java:670）在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:945）在android.os.Handler.handleCallback（Handler.java:751）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6776）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1518） com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1408）

[由于某种原因，它不会让我在此处粘贴堆栈跟踪的最后一部分，所以我要输入它：] 造成原因：java.lang.ClassCastException：android.support.ConstraintLayout无法转换为android.widget.TextView 在android.widget.ArrayAdapter.createViewFromResource（ArrayAdapter.java:388）上<42更多...> <1内部调用> <2更多...>

我猜想，如果我真的可以看到在堆栈跟踪的最后一行中所隐含的行，这将启发我知道我在代码中犯了什么错误，但给出的只是Java代码，这不是很有帮助。

我倾向于认为我的微调器初始化代码在Java中引起了某种问题，但我所看到的只是问题的这个方面，而对问题的出处一无所知在我的代码中。我该如何解决？

关于它的价值，这是我给两个微调器的初始化代码：

    //Set up spinner for Client Code
    spClientCode = findViewById(R.id.client_spinner);
    //Create an array of client codes from the Client enum
    ArrayList<String> clientCodes = new ArrayList<>();
    for (Client client: Client.values()) {
        clientCodes.add(client.toString());
    }
    ArrayAdapter<String> clientAdapter = new ArrayAdapter(this, R.layout.activity_add_sale, clientCodes);

    clientAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spClientCode.setAdapter(clientAdapter);

    //Set up spinner for Seller
    spSellerName = findViewById(R.id.seller_spinner);
    //Create an array of seller names from the Seller enum
    ArrayList<String> sellers = new ArrayList<>();
    for (Seller seller: Seller.values()) {
        sellers.add(seller.toString());
    }
    ArrayAdapter<String> sellerAdapter = new ArrayAdapter(this, R.layout.activity_add_sale, sellers);

    sellerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spSellerName.setAdapter(sellerAdapter);

了解我的应用中没有行的stacktrace

0 个答案: