起因是在做自定义 验证码 VIEW时遇到，特此记录如下
image.png
思路：
问题在于它们只能与硬件键盘配合使用。要使用IME（软键盘）执行此操作,重写sendKeyEvent在EditText的InputConnection类。在IME中发生关键事件时调用此方法。
具体方案代码：
public class XEditText extends android.support.v7.widget.AppCompatEditText {
private OnDelKeyEventListener delKeyEventListener;
public XEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public XEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
public XEditText(Context context) {
super(context);
}
/**
* 解决部分机型不支持监听delete键
*/
@Override
public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
return new XInputConnection(super.onCreateInputConnection(outAttrs),
true);
}
private class XInputConnection extends InputConnectionWrapper {
public XInputConnection(InputConnection target, boolean mutable) {
super(target, mutable);
}
@Override
public boolean sendKeyEvent(KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN
&& event.getKeyCode() == KeyEvent.KEYCODE_DEL) {
if (delKeyEventListener != null) {
delKeyEventListener.onDeleteClick();
return true;
}
}
return super.sendKeyEvent(event);
}
@Override
public boolean deleteSurroundingText(int beforeLength, int afterLength) {
if (beforeLength == 1 && afterLength == 0) {
return sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN,
KeyEvent.KEYCODE_DEL))
&& sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP,
KeyEvent.KEYCODE_DEL));
}
return super.deleteSurroundingText(beforeLength, afterLength);
}
}
/**
* EditText 删除回调
*/
public void setDelKeyEventListener(OnDelKeyEventListener delKeyEventListener) {
this.delKeyEventListener = delKeyEventListener;
}
public interface OnDelKeyEventListener {
void onDeleteClick();
}
}
以上是解决DEL无法监听DEL按钮问题，下是是验证码自定义控件
（不是自己写的，COPY网上代码）
public class PhoneCode extends RelativeLayout {
private Context context;
private TextView tv_code1;
private TextView tv_code2;
private TextView tv_code3;
private TextView tv_code4;
private View v1;
private View v2;
private View v3;
private View v4;
private XEditText et_code;
private List codes = new ArrayList<>();
private InputMethodManager imm;
public PhoneCode(Context context) {
super(context);
this.context = context;
loadView();
}
public PhoneCode(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
loadView();
}
private void loadView() {
imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
View view = LayoutInflater.from(context).inflate(R.layout.phone_code, this);
initView(view);
initEvent();
}
private void initView(View view) {
tv_code1 = (TextView) view.findViewById(R.id.tv_code1);
tv_code2 = (TextView) view.findViewById(R.id.tv_code2);
tv_code3 = (TextView) view.findViewById(R.id.tv_code3);
tv_code4 = (TextView) view.findViewById(R.id.tv_code4);
et_code = (XEditText) view.findViewById(R.id.et_code);
v1 = view.findViewById(R.id.v1);
v2 = view.findViewById(R.id.v2);
v3 = view.findViewById(R.id.v3);
v4 = view.findViewById(R.id.v4);
et_code.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DEL) {
}
return false;
}
});
}
private void initEvent() {
//验证码输入
et_code.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
if (editable != null && editable.length() > 0) {
et_code.setText("");
if (codes.size() < 4) {
codes.add(editable.toString());
showCode();
}
}
}
});
// 监听验证码删除按键
et_code.setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View view, int keyCode, KeyEvent keyEvent) {
if (keyCode == KeyEvent.KEYCODE_DEL && keyEvent.getAction() == KeyEvent.ACTION_DOWN && codes.size() > 0) {
codes.remove(codes.size() - 1);
showCode();
return true;
}
return false;
}
});
}
/**
* 显示输入的验证码
*/
private void showCode() {
String code1 = "";
String code2 = "";
String code3 = "";
String code4 = "";
if (codes.size() >= 1) {
code1 = codes.get(0);
}
if (codes.size() >= 2) {
code2 = codes.get(1);
}
if (codes.size() >= 3) {
code3 = codes.get(2);
}
if (codes.size() >= 4) {
code4 = codes.get(3);
}
tv_code1.setText(code1);
tv_code2.setText(code2);
tv_code3.setText(code3);
tv_code4.setText(code4);
setColor();//设置高亮颜色
callBack();//回调
}
/**
* 设置高亮颜色
*/
private void setColor() {
int color_default = Color.parseColor("#999999");
int color_focus = Color.parseColor("#3F8EED");
v1.setBackgroundColor(color_default);
v2.setBackgroundColor(color_default);
v3.setBackgroundColor(color_default);
v4.setBackgroundColor(color_default);
if (codes.size() == 0) {
v1.setBackgroundColor(color_focus);
}
if (codes.size() == 1) {
v2.setBackgroundColor(color_focus);
}
if (codes.size() == 2) {
v3.setBackgroundColor(color_focus);
}
if (codes.size() >= 3) {
v4.setBackgroundColor(color_focus);
}
}
/**
* 回调
*/
private void callBack() {
if (onInputListener == null) {
return;
}
if (codes.size() == 4) {
onInputListener.onSucess(getPhoneCode());
} else {
onInputListener.onInput();
}
}
//定义回调
public interface OnInputListener {
void onSucess(String code);
void onInput();
}
private OnInputListener onInputListener;
public void setOnInputListener(OnInputListener onInputListener) {
this.onInputListener = onInputListener;
}
/**
* 显示键盘
*/
public void showSoftInput() {
//显示软键盘
if (imm != null && et_code != null) {
et_code.postDelayed(new Runnable() {
@Override
public void run() {
imm.showSoftInput(et_code, 0);
}
}, 200);
}
}
/**
* 获得手机号验证码
*
* @return 验证码
*/
public String getPhoneCode() {
StringBuilder sb = new StringBuilder();
for (String code : codes) {
sb.append(code);
}
return sb.toString();
}
}
布局文件如下：