Android 在第一个框中输入字符后，焦点转到下一个框

我必须实现一个应用程序，其中我为输入PIN码和手机号设置了小的

edittext

。每个编辑文本一次包含一个字符。
现在，当我运行此应用程序时，我发现对于每个框，我需要将焦点放在每个

edittext

因此，在这种情况下，是否可以在第一个输入字符后在下一个编辑文本中设置焦点，然后在第二个输入字符后转到第三个编辑文本中。
因此，请帮我解决这个问题

这是布局图

1. implements TextWatcher on EditTexts

然后，当您获得Edittext的文本时，长度为1

2. Change focus on other EditText using

在另一个EditText上调用

requestFocus（）

代码：（此代码仅供您理解，根据您的情况和需要可能会有所不同）

然后，当您获得Edittext的文本时，长度为1

2. Change focus on other EditText using

在另一个EditText上调用

requestFocus（）

代码：（此代码仅供您理解，根据您的情况和需要可能会有所不同）

使用此代码

final EditText EditText01 = (EditText) findViewById(R.id.editText01);
final EditText EditText02= (EditText) findViewById(R.id.editText02);
final EditText EditText03 = (EditText) findViewById(R.id.editText03);
final EditText EditText04 = (EditText) findViewById(R.id.editText04);

EditText01.requestFocus();
EditText01.setOnFocusChangeListener(new View.OnFocusChangeListener() {

                    @Override
                    public void onFocusChange(final View v,
                            final boolean hasFocus) {

                        if (hasFocus) {
                            final InputMethodManager mgr = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                            // only will trigger it if no physical keyboard is
                            // open
                            mgr.showSoftInput(EditText01,
                                    InputMethodManager.SHOW_IMPLICIT);
                        }

                    }
                });

        EditText01.setOnKeyListener(new View.OnKeyListener() {

            @Override
            public boolean onKey(final View v, final int keyCode,
                    final KeyEvent event) {

                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_DEL) {
                        EditText01.requestFocus();
                    } else {
                        EditText02.requestFocus();
                    }
                }
                return false;
            }
        });

        EditText02.setOnKeyListener(new View.OnKeyListener() {

            @Override
            public boolean onKey(final View v, final int keyCode,
                    final KeyEvent event) {

                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_DEL) {
                        EditText01.requestFocus();
                    } else {
                        EditText03.requestFocus();
                    }
                }
                return false;
            }
        });
        EditText03.setOnKeyListener(new View.OnKeyListener() {

            @Override
            public boolean onKey(final View v, final int keyCode,
                    final KeyEvent event) {

                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_DEL) {
                        EditText02.requestFocus();
                    } else {
                        EditText04.requestFocus();
                    }

                }
                return false;
            }
        });

        EditText04.setOnKeyListener(new View.OnKeyListener() {

            @Override
            public boolean onKey(final View v, final int keyCode,
                    final KeyEvent event) {

                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_DEL) {
                        EditText03.requestFocus();
                    } 

                }

                return false;

            }
        });

使用此代码

final EditText EditText01 = (EditText) findViewById(R.id.editText01);
final EditText EditText02= (EditText) findViewById(R.id.editText02);
final EditText EditText03 = (EditText) findViewById(R.id.editText03);
final EditText EditText04 = (EditText) findViewById(R.id.editText04);

EditText01.requestFocus();
EditText01.setOnFocusChangeListener(new View.OnFocusChangeListener() {

                    @Override
                    public void onFocusChange(final View v,
                            final boolean hasFocus) {

                        if (hasFocus) {
                            final InputMethodManager mgr = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                            // only will trigger it if no physical keyboard is
                            // open
                            mgr.showSoftInput(EditText01,
                                    InputMethodManager.SHOW_IMPLICIT);
                        }

                    }
                });

        EditText01.setOnKeyListener(new View.OnKeyListener() {

            @Override
            public boolean onKey(final View v, final int keyCode,
                    final KeyEvent event) {

                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_DEL) {
                        EditText01.requestFocus();
                    } else {
                        EditText02.requestFocus();
                    }
                }
                return false;
            }
        });

        EditText02.setOnKeyListener(new View.OnKeyListener() {

            @Override
            public boolean onKey(final View v, final int keyCode,
                    final KeyEvent event) {

                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_DEL) {
                        EditText01.requestFocus();
                    } else {
                        EditText03.requestFocus();
                    }
                }
                return false;
            }
        });
        EditText03.setOnKeyListener(new View.OnKeyListener() {

            @Override
            public boolean onKey(final View v, final int keyCode,
                    final KeyEvent event) {

                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_DEL) {
                        EditText02.requestFocus();
                    } else {
                        EditText04.requestFocus();
                    }

                }
                return false;
            }
        });

        EditText04.setOnKeyListener(new View.OnKeyListener() {

            @Override
            public boolean onKey(final View v, final int keyCode,
                    final KeyEvent event) {

                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_DEL) {
                        EditText03.requestFocus();
                    } 

                }

                return false;

            }
        });

---

添加文本更改侦听器

      textView1.addTextChangedListener(new TextWatcher() {
            public void afterTextChanged(Editable s) {

               textView2.requestFocus();

            }

            public void beforeTextChanged(CharSequence s, int start, int count,             int after) {
             }

            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }
        });

---

添加文本更改侦听器

      textView1.addTextChangedListener(new TextWatcher() {
            public void afterTextChanged(Editable s) {

               textView2.requestFocus();

            }

            public void beforeTextChanged(CharSequence s, int start, int count,             int after) {
             }

            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }
        });

这应该行得通。 mPinFirst等是表示每个Pin条目的编辑文本。 还应注意退格

    mPinFirst.setOnKeyListener(onKeyListener);
    mPinSecond.setOnKeyListener(onKeyListener);
    mPinThird.setOnKeyListener(onKeyListener);
    mPinFourth.setOnKeyListener(onKeyListener);




View.OnKeyListener onKeyListener = new View.OnKeyListener() {
        @Override
        public boolean onKey(View view, int i, KeyEvent keyEvent) {

        if(KeyEvent.KEYCODE_DEL != keyEvent.getKeyCode()) {
            if (((ESEditText) view).getText().length() == 1)
                if (view.focusSearch(View.FOCUS_RIGHT) != null) {
                    view.focusSearch(View.FOCUS_RIGHT).requestFocus();
                    return true;
                }
        }else{
            ((ESEditText) view).setText("");
            if (view.focusSearch(View.FOCUS_LEFT) != null) {
                view.focusSearch(View.FOCUS_LEFT).requestFocus();
                return true;
            }
        }
        return false;
    }
};

这应该行得通。 mPinFirst等是表示每个Pin条目的编辑文本。 还应注意退格

    mPinFirst.setOnKeyListener(onKeyListener);
    mPinSecond.setOnKeyListener(onKeyListener);
    mPinThird.setOnKeyListener(onKeyListener);
    mPinFourth.setOnKeyListener(onKeyListener);




View.OnKeyListener onKeyListener = new View.OnKeyListener() {
        @Override
        public boolean onKey(View view, int i, KeyEvent keyEvent) {

        if(KeyEvent.KEYCODE_DEL != keyEvent.getKeyCode()) {
            if (((ESEditText) view).getText().length() == 1)
                if (view.focusSearch(View.FOCUS_RIGHT) != null) {
                    view.focusSearch(View.FOCUS_RIGHT).requestFocus();
                    return true;
                }
        }else{
            ((ESEditText) view).setText("");
            if (view.focusSearch(View.FOCUS_LEFT) != null) {
                view.focusSearch(View.FOCUS_LEFT).requestFocus();
                return true;
            }
        }
        return false;
    }
};

---

将TextWatcher应用于您的edittext，并在其1将焦点更改为下一视图时获取输入字符的长度。检查将TextWatcher应用于您的edittext，并在其1将焦点更改为下一视图时获取输入字符的长度。检查您能否给我一个示例您能否给我一个示例