由于没有窗口焦点而取消事件:MotionEvent [英] Cancelling event due to no window focus : MotionEvent
问题描述
故事是这样的:
我正在尝试在 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，计算机都会告诉您猜测的数字是小于实际数字(冷)还是大于实际数字(热).我决定让用户在 editTextView 中输入他的猜测.我将 onFocus 事件侦听器绑定到 editTextView，这样当用户按下 Enter 键或点击其他位置时，它会将猜测提交给计算机.我在模拟器中运行了代码，我从控制台收到了一些消息，内容类似于以下内容:
I am trying to build a guessing game in Android Studio. Where the user has to guess a number that resides between 0 and 1000. Every time the user makes a guess, the computer will tell you if the guess is smaller than the actual number(Cold) or greater than the actual number(hot). I decided to have the user enter his guess inside of an editTextView. I binded an onFocus event listener to the editTextView so that when the user presses enter or taps somewhere else, it submits the guess to the computer. I ran the code in the emulator and I recieved some messages from the console say things similar to the following:
W/ViewRootImpl:由于没有窗口焦点而取消事件: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","");
}
}
}
这是产生消息的代码.如果您需要更多信息或希望我详细说明某事，请告诉我！
This is the code that produces the message. If you require any more information or would like me to elaborate on something, please let me know!
假设 ID 是正确的，并且程序中的所有视图都存在于活动中.每当用户按下 Enter 键或更改焦点时，onFocusChange 函数似乎都没有运行.
Assume Ids are correct, and all views that are in the program exist in the activity. It seems like the function onFocusChange is not running whenever the user presses enter or changes the focus.
当我打开 edittext 元素上的 focusable 属性时，出现了一个新错误.这是错误:
I have a new error that showed up when I turned on the focusable property on the edittext element. here is the error:
W/ResourceType: Failure getting entry for 0x01080346 (t=7 e=838) (error -75)
[ 07-13 12:54:05.572 2725: 2725 I/ ]
RAN!
它只在程序开始时发生一次
It only happens ONCE at the start of the program
以下代码提供了代码链接到的活动.
The following code provides the activity that the code links to.
<?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>
如果您有什么需要，请随时问我！
If there is anything that you need do not hesitate to ask me!
谁能告诉我以下错误是什么意思?当我点击编辑文本框时，它们就会出现.
Can anyone tell me what the following errors mean? They come out when I click on the edittext box.
W/EGL_emulation:eglSurfaceAttrib 未实现W/OpenGLRenderer:无法在表面 0xa9fc6300 上设置 EGL_SWAP_BEHAVIOR，错误=EGL_SUCCESSE/Surface:getSlotFromBufferLocked:未知缓冲区:0xae3f3fb0
推荐答案
请按照以下步骤操作，让我知道它是否有效
Please follow below steps and let me know if it works
- 覆盖 dispatchKeyEvent 以检查是否按下了 Tab 或 Enter.
- 如果按下 Tab 或 Enter 并且 EditTextView 具有焦点，则提交猜测.
如果您有任何疑问或需要代码片段，请告诉我.
Let me know if you have any doubts or need a code snippet.
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