取消事件，由于没有窗口焦点：MotionEvent

这里的故事：取消事件，由于没有窗口焦点：MotionEvent

我想在Android Studio中构建一个猜谜游戏。用户必须猜测一个介于0和1000之间的数字。每次用户猜测时，计算机会告诉您猜测是小于实际数量（Cold）还是大于实际数量（Hot）。我决定让用户在editTextView中输入他的猜测。我将一个onFocus事件监听器绑定到editTextView，以便当用户按Enter键或点击其他位置时，它将猜测提交给计算机。我跑在模拟器中的代码，我收到从控制台的一些消息说，类似下面的事情：

W/ViewRootImpl: Cancelling event due to no window focus: MotionEvent { action=ACTION_CANCEL, actionButton=0, id[0]=0, x[0]=605.52246, y[0]=969.4336, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=238238, downTime=235422, deviceId=0, source=0x1002 }

public class GameActivity extends AppCompatActivity implements View.OnFocusChangeListener { 
    public final int MAXNUMBER = 1000; 
    private int theAnswer; // stores the number the user has to guess 
    public int guesses = 0; 
    public EditText userGuess; 
    public TextView hotOrCold; 
    public String isHotOrCold(int userInput){ 
     return theAnswer < userInput?"Hot":"Cold"; // Utility to tell the user if his guess is greater than or less than the number. 
    } 
    public boolean isValidInput(int num){ 
     return num >= 0 && num <= MAXNUMBER; 
    } 
    public void resetGame(){ 
     guesses = 0; 
     theAnswer = (int) (Math.random() * (MAXNUMBER + 1)); 
    } 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_game); 

     userGuess = (EditText)findViewById(R.id.userGuess); 
     hotOrCold = (TextView) findViewById(R.id.hotOrCold); 
     resetGame(); 
     userGuess.setOnFocusChangeListener(this); 
    } 

    @Override 
    public void onFocusChange(View v, boolean hasFocus) { 
     /* When focus is lost check that the text field 
     * has valid values. 
     */ 
     Log.i("","RAN!"); 
     if (!hasFocus) { 
      guesses++; 
      int userInput = Integer.valueOf(userGuess.getText().toString()); // get user input 
      Log.i("userInput is: ",userInput+""); 
      if (isValidInput(userInput)){ 
       if (theAnswer == userInput){ 
        Toast.makeText(getApplicationContext(),"Congrats! The number was: "+userInput+". You got it in " + guesses + " guesses!",Toast.LENGTH_LONG); // Tell user he got it right 
        hotOrCold.setText("Hot Or Cold"); // set text to default 
        resetGame(); 
       } else { 
        hotOrCold.setText(isHotOrCold(userInput)); // Tells user if he is hot or cold. 
       } 
      } else { 
       // do nothing 
      } 
     } else { 
      Log.i("Did Run",""); 
     } 
    } 
}

这是产生信息的代码。如果您需要更多信息或希望我详细说明，请告诉我！

假设ID是正确的，并且活动中存在程序中的所有视图。似乎功能onFocusChange没有运行，只要用户按下输入或更改焦点。

编辑：我有一个新的错误，显示了当我打开edittext元素上的focusable属性。这里是错误：

W/ResourceType: Failure getting entry for 0x01080346 (t=7 e=838) (error -75) 
    [ 07-13 12:54:05.572 2725: 2725 I/   ] 
    RAN!

它只是在程序

下面的代码开始发生一次提供了活动的代码链接。

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context="com.example.alexander.guessinggame.GameActivity"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:text="Hot or Cold" 
     android:id="@+id/hotOrCold" 
     android:layout_alignParentTop="true" 
     android:layout_centerHorizontal="true" 
     android:textIsSelectable="false" 
     android:textSize="50sp" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAppearance="?android:attr/textAppearanceSmall" 
     android:text="*Hot:too big, cold:too small" 
     android:id="@+id/textView3" 
     android:layout_alignParentBottom="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:textIsSelectable="false" 
     android:textSize="17sp" /> 

    <EditText 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:inputType="number" 
     android:ems="10" 
     android:id="@+id/userGuess" 
     android:layout_above="@+id/textView3" 
     android:layout_centerHorizontal="true" 
     android:layout_marginBottom="111dp" 
     android:numeric="integer" 
     android:selectAllOnFocus="true" 
     android:editable="true" 
     android:focusableInTouchMode="true" 
     android:focusable="true" 
     android:enabled="true" 
     android:singleLine="true" 
     android:clickable="true" 
     android:maxLength="4" /> 

</RelativeLayout>

如果有什么需要请不要犹豫，问我！

谁能告诉我以下错误是什么意思？当我点击edittext框时，它们就出来了。

W/EGL_emulation: eglSurfaceAttrib not implemented
W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xa9fc6300, error=EGL_SUCCESS
E/Surface: getSlotFromBufferLocked: unknown buffer: 0xae3f3fb0

来源

2016-07-13 ahitt6345

您可以覆盖：

onKeyUp(int keyCode, KeyEvent event)

来源

2017-08-03 03:29:14 xupeixuan

取消事件，由于没有窗口焦点：MotionEvent

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