故事是这样的:
我正在尝试在 Android Studio 中构建猜谜游戏。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
事件监听器绑定(bind)到 editTextView,这样当用户按下 enter 或点击其他地方时,它会将猜测提交给计算机。我在模拟器中运行了代码,并从控制台收到了一些类似于以下内容的消息:
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","");
}
}
}
这是生成消息的代码。如果您需要更多信息或希望我详细说明某些内容,请告诉我!
假设 ID 正确,并且程序中的所有 View 都存在于 Activity 中。似乎函数 onFocusChange
没有在用户按下 enter 键或更改焦点时运行。
编辑: 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:
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
以下代码提供代码链接到的 Activity 。
<?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>
如果有任何需要,请尽管问我!
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。
W/EGL_emulation:eglSurfaceAttrib 未实现
W/OpenGLRenderer:无法在表面 0xa9fc6300 上设置 EGL_SWAP_BEHAVIOR,错误=EGL_SUCCESS
E/Surface:getSlotFromBufferLocked:未知缓冲区:0xae3f3fb0
最佳答案
你可以覆盖:
onKeyUp(int keyCode, KeyEvent event)
关于android - 由于没有窗口焦点而取消事件 : MotionEvent,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38341339/