我的应用中有多个按钮。现在我改变了其中一些样式，如果我拖动（我没有配置拖动事件），我收到此错误（请参阅下面的堆栈跟踪）。
这是我在样式文件中添加的新样式：
<style name="Button.Raised" parent="@style/Widget.AppCompat.Button.Colored">
<item name="android:height">36dp</item>
<item name="android:textSize">14sp</item>
<item name="android:capitalize">characters</item>
<item name="android:minWidth">64dp</item>
<item name="android:paddingRight">8dp</item>
<item name="android:paddingLeft">8dp</item>
<item name="android:layout_marginLeft">8dp</item>
<item name="android:layout_marginRight">8dp</item>
</style>
堆栈跟踪：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.company.appname, PID: 20408
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.widget.Editor$SelectionModifierCursorController.isDragAcceleratorActive()' on a null object reference
at android.widget.Editor.updateFloatingToolbarVisibility(Editor.java:1556)
at android.widget.Editor.onTouchEvent(Editor.java:1502)
at android.widget.TextView.onTouchEvent(TextView.java:10071)
at android.view.View.dispatchTouchEvent(View.java:10779)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:582)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1885)
at android.app.Activity.dispatchTouchEvent(Activity.java:3240)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:544)
at android.view.View.dispatchPointerEvent(View.java:11008)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5162)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5014)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4539)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4592)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4558)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4691)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4566)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4748)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4539)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4592)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4558)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4566)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4539)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7099)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7031)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6992)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7209)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:176)
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:7173)
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:7236)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:959)
at android.view.Choreographer.doCallbacks(Choreographer.java:734)
at android.view.Choreographer.doFrame(Choreographer.java:664)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:945)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496)
E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386)
这很烦人，因为即使按钮没有附加事件监听器也会失败（只需在活动中放一个按钮并尝试拖动它），应用程序崩溃。我知道我做错了什么？
修改
过滤来源：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.realizar_pago);
// HERE IS ONE OF THE FAILING BUTTONS
mostrarPIN = (Button)findViewById(R.id.botonMostrarPIN);
mostrarPIN.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
// ... some stuff here ...
}
});
// The other failing button has no code, no link only was put in
// order to check error. That button is called botonFinanciar in XML Code
}
完整来源：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.realizar_pago);
Bundle b = getIntent().getExtras();
this.importePago = -1; // or other values
if (b != null){
this.importePago = b.getInt("importe");
this.operacion = b.getString("operacion");
}
this.listaTarjetas = new ArrayList<TarjetaCredito>();
this.listaTarjetas = LocalStorageServices.DatabaseService().getTarjetasCredito();
//DATOS DE PRUEBA DE TARJETAS
/*
addTarjeta(1,"VISA Oro", "asdib23rg34", "7294", false);
addTarjeta(2, "Compras Online", "fibsdijvbasldjv", "4873", false);
addTarjeta(3, "Tarjeta familia", "534534j5bn54", "5826", true);
*/
listaTarjetas.add(new TarjetaCredito());
// Listado de tarjetas y controles asociados a cada una
RecyclerView rv = (RecyclerView)findViewById(R.id.realizar_pago_tarjetero);
rv.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
rv.setLayoutManager(llm);
adapter = new RVAdapter(this, ponerTarjetaPorDefectoDePrimera(listaTarjetas));
adapter.setOnRecycleViewClickListener(new RecyclerViewClickListener() {
@Override
public void recyclerViewListClicked(View v, int position) {
TarjetaCredito auxT = listaTarjetas.get(position);
if(tarjetaSeleccionada == null){
// NO habia tarjeta seleccionamos la pulsada
tarjetaSeleccionada = auxT;
adapter.seleccionarTarjeta(position);
}else if(tarjetaSeleccionada == auxT){
// Se ha pulsado sobre la misma tarjeta
tarjetaSeleccionada = null;
adapter.deseleccionarTarjeta(position);
}else{
// Se ha seleccionado otra tarjeta
adapter.limpiarSeleccionTarjetas();
tarjetaSeleccionada = auxT;
adapter.seleccionarTarjeta(position);
}
}
});
rv.setAdapter(adapter);
// Vamos a agregar un observador al adaptador para que lance un evento cuando cambien
// los datos, es decir, cuando hayan borrado una tarjeta
adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
@Override
public void onChanged() {
super.onChanged();
adapter.seleccionPorDefecto();
}
});
rv.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
//En este punto la vista ha sido construida y podemos marcar la tarjeta por defecto
//Seleccionamos la tarjeta por defecto
adapter.seleccionPorDefecto();
}
});
mostrarPIN = (Button)findViewById(R.id.botonMostrarPIN);
mostrarPIN.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
final Dialog dialog = new Dialog(context);
// Verificamos que haya una tarjeta seleccionada
if(tarjetaSeleccionada != null){
// Si hay una tarjeta seleccionada tenemos que pedir el PIN al usuario
// Si no lo ha establecido, en su primera compra le obligamos a establecer un PIN
if(LocalStorageServices.DatabaseService().userHasSetPin()){
// Ha establecido PIN, pedimos que lo ponga
} else {
// Proceso de selección de PIN
}
dialog.setContentView(R.layout.ventana_pin);
dialog.setTitle("Inserta tu PIN");
final EditText pinText = (EditText)dialog.findViewById(R.id.textPin);
Button dialogButtonPin = (Button) dialog.findViewById(R.id.botonDialogoComprobarPin);
Button dialogButtonCancel = (Button) dialog.findViewById(R.id.botonDialogoCancelar);
dialogButtonPin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialogButtonCancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.cancel();
}
});
dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
dialog.show();
// Ponemos el foco en la caja del pin y abrimos el teclado
pinText.requestFocus();
}else{
// Mostramos diálogo de confirmación
AlertDialog.Builder builder = new AlertDialog.Builder(context, R.style.AppThemeDialogs);
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setTitle("Error de tarjeta");
builder.setMessage("Para realizar un pago tienes que seleccionar una tarjeta.");
builder.setPositiveButton("Aceptar", null);
builder.show();
}
}
});
}
尚未完成。无论如何，当我将样式Button.Raised放到按钮上并长按然后拖动它时会出现错误。
活动的XML：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/fondo_pantalla"
android:orientation="vertical">
<TextView
android:id="@+id/textoTitulo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/white_title"
android:gravity="center"
android:text="SELECCIONA TU TARJETA"
android:textAlignment="center"
style="@style/Typos.Headline"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="@+id/realizar_pago_tarjetero"
android:scrollbars="none"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@color/barraChat"
android:orientation="horizontal"/>
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="5dp">
<TextView
android:id="@+id/textoImporte"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/white_title"
android:gravity="center"
android:text="7€"
android:textAlignment="center"
style="@style/Typos.Headline"/>
<Button
android:id="@+id/botonMostrarPIN"
style="@style/Button.Raised"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/activity_vertical_margin"
android:text="Pagar ya" />
</LinearLayout>
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp">
<Button
android:id="@+id/botonFinanciar"
style="@style/Button.Raised.BlueAbanca"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Financiar"
android:backgroundTint="#ff5b87da"
app:backgroundTint="#ff5b87da"
app:layout_constraintBottom_toTopOf="@+id/imageView4"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<android.support.v7.widget.AppCompatImageView
android:id="@+id/imageView4"
android:layout_width="139dp"
android:layout_height="28dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:srcCompat="@drawable/ic_abanca" />
</android.support.constraint.ConstraintLayout>
</LinearLayout>
答案 0 :(得分：1)
这是一个奇怪的问题，但也许您应该尝试使用clean和rebuild项目并检查字段的初始化