问题描述
我不明白如何在一个片段执行onKey $ P $宗座外方传教会（INT键code，KeyEvent的事件）。
I cannot figure how to implement onKeyPreIme(int keyCode, KeyEvent event) in a fragment.
@Override
public boolean onKeyPreIme(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK &&
event.getAction() == KeyEvent.ACTION_UP) {
// do your stuff
return false;
}
return super.dispatchKeyEvent(event);
}
我想了很多，但没有任何工程。此外，我无法找到谷歌或计算器什么。我想执行一个动作时，返回键是pssed $ P $和softkeyboard到了。设置我的editexts一个onkeylistener没有工作，因为KeyEvent.KEY code_BACK当软键盘是涨是不叫。我AP preciate任何帮助和源$ C $ C。
I tried a lot but nothing works. Also I could not find anything on google or stackoverflow. I would like to perform an action when the back key is pressed and the softkeyboard is up. Setting a onkeylistener on my editexts did not work, since KeyEvent.KEYCODE_BACK is not called when the soft keyboard is up. I appreciate any help and source code.
推荐答案
我可以通过子类均与键盘输入，我的意见的EditText实现onKey $ P $宗座外方传教会。我们的目标是让用户必须输入一个密码code或离开该应用程序的自定义锁屏。当用户点击键盘向下按钮，键盘不会消失。
I was able to implement onKeyPreIme by sub-classing my EditText views that were related to the keyboard input. The goal is to make a custom lock screen that the user must enter a pass code or leave the application. When the user taps the "keyboard down" button the keyboard does not disappear.
请确保创建了子类的EditText一个独立的.java文件。此外，一定要使用构造函数中的code以下（必须通过AttrubuteSet）。
Make sure to create a separate .java file for the subclassed EditText. Additionally, be sure to use the constructor in the code below (must pass AttrubuteSet).
我意识到，我的执行onKey $ P $宗座外方传教会的可能不符合你的，但它确实演示了如何前InputMethodManager做这件事截获键盘事件。
I realize that my implementation of onKeyPreIme may not match yours, however it does demonstrate how to intercept the keyboard events before the InputMethodManager does it's thing.
我希望这有助于。
截图UserLockActivity
Screenshot UserLockActivity
子类的EditText
EditText Subclass
public class LockEditText extends EditText {
/* Must use this constructor in order for the layout files to instantiate the class properly */
public LockEditText(Context context, AttributeSet attrs)
{
super(context, attrs);
// TODO Auto-generated constructor stub
}
@Override
public boolean onKeyPreIme (int keyCode, KeyEvent event)
{
// Return true if I handle the event:
// In my case i want the keyboard to not be dismissible so i simply return true
// Other people might want to handle the event differently
System.out.println("onKeyPreIme " +event);
return true;
}
}
UserLockActivity.java
UserLockActivity.java
public class UserLockActivity extends Activity
{
private LockEditText editText1;
private LockEditText editText2;
private LockEditText editText3;
private LockEditText editText4;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_lock);
editText1 = (LockEditText) findViewById(R.id.lock_text_1);
editText2 = (LockEditText) findViewById(R.id.lock_text_2);
editText3 = (LockEditText) findViewById(R.id.lock_text_3);
editText4 = (LockEditText) findViewById(R.id.lock_text_4);
setupTextChangedListener(editText1);
setupTextChangedListener(editText2);
setupTextChangedListener(editText3);
setupTextChangedListener(editText4);
// A method to bring out the keyboard when the view appears
setFocusOnEditText(editText1);
}
public void setFocusOnEditText(LockEditText editText)
{
editText.clearFocus();
editText.requestFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,0);
}
public void setupTextChangedListener(LockEditText editText)
{
editText.addTextChangedListener(new TextWatcher()
{
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
{
}
@Override
public void afterTextChanged(Editable arg0)
{
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,int arg2, int arg3)
{
// TODO Auto-generated method stub
}
});
}
}
activity_user_lock.xml布局文件
activity_user_lock.xml Layout file
<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=".UserLockActivity" >
<TextView
android:id="@+id/main_lock_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentTop="true"
android:paddingTop="60dp"
android:paddingBottom="20dp"
android:text="@string/enter_passcode"
android:textAppearance="?android:attr/textAppearanceLarge" />
<LinearLayout
android:id="@+id/lock_input_layout"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_below="@+id/main_lock_text"
android:orientation="horizontal" >
<com.yourpackage.yourappname.LockEditText
android:id="@+id/lock_text_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="1"
android:ems="10"
android:inputType="numberPassword"
android:textSize="30sp"
android:gravity="center_horizontal"
android:textStyle="bold" >
</com.yourpackage.yourappname.LockEditText>
<com.yourpackage.yourappname.LockEditText
android:id="@+id/lock_text_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="1"
android:ems="10"
android:inputType="numberPassword"
android:textSize="30sp"
android:gravity="center_horizontal"
android:textStyle="bold" >
</com.yourpackage.yourappname.LockEditText>
<com.yourpackage.yourappname.LockEditText
android:id="@+id/lock_text_3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="1"
android:ems="10"
android:inputType="numberPassword"
android:textSize="30sp"
android:gravity="center_horizontal"
android:textStyle="bold">
</com.yourpackage.yourappname.LockEditText>
<com.yourpackage.yourappname.LockEditText
android:id="@+id/lock_text_4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="1"
android:ems="10"
android:inputType="numberPassword"
android:textSize="30sp"
android:gravity="center_horizontal"
android:textStyle="bold" >
</com.yourpackage.yourappname.LockEditText>
</LinearLayout>
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/lock_input_layout"
android:layout_centerHorizontal="true"
android:text="text" />
</RelativeLayout>
这篇关于实施片段onKey $ P $宗座外方传教会（INT键code，KeyEvent的事件）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！