在Android開發(fā)中怎么實現(xiàn)一個自定義輸入法功能？很多新手對此不是很清楚，為了幫助大家解決這個難題，下面小編將為大家詳細講解，有這方面需求的人可以來學習下，希望你能有所收獲。
專注于為中小企業(yè)提供成都網(wǎng)站設(shè)計、成都做網(wǎng)站服務,電腦端+手機端+微信端的三站合一,更高效的管理,為中小企業(yè)明水免費做網(wǎng)站提供優(yōu)質(zhì)的服務。我們立足成都，凝聚了一批互聯(lián)網(wǎng)行業(yè)人才，有力地推動了上千企業(yè)的穩(wěn)健成長，幫助中小企業(yè)通過網(wǎng)站建設(shè)實現(xiàn)規(guī)模擴充和轉(zhuǎn)變。
1.前面兩個輸入框使用了自定義的輸入法：
2.第三個輸入框沒有進行任何設(shè)置，因此將使用默認的輸入法：
（二）代碼簡介：
1.主頁面布局，由3個輸入框加上一個android.inputmethodservice.KeyboardView組成。android.inputmethodservice.KeyboardView是一個系統(tǒng)自帶的繼承自View的組件，但是它不在android.view這個包下面，因此這里需要寫上完整的包名。
2.KeyboardView是一個顯示輸入法的容器控件，使用時需要設(shè)置具體的輸入法面板內(nèi)容。
（1）首先在res下新建xml目錄，然后創(chuàng)建文件keys_layout.xml，即輸入法面板的內(nèi)容。每個row表示一行，Keyboad的屬性keyWidth和keyHeight表示每個按鍵的大小，25%p表示占父組件的25%. Key的屬性codes表示該按鍵的編號（點擊時系統(tǒng)回調(diào)方法中會返回這個值，用以區(qū)分不同的按鍵），keyLabel表示按鍵上面顯示的文字。還有很多其它的屬性，不再陳述。
<?xml version="1.0" encoding="utf-8"?>|
|
|
（2）為了使用方便，新建一個類：KeyboardBuilder.java，用于初始化自定義輸入法和綁定EditText，代碼如下：
重慶分公司
重慶分公司
public class KeyboardBuilder {
private static final String TAG = "KeyboardBuilder";
private Activity mActivity;
private KeyboardView mKeyboardView;
public KeyboardBuilder(Activity ac, KeyboardView keyboardView, int keyBoardXmlResId) {
mActivity = ac;
mKeyboardView = keyboardView;
Keyboard mKeyboard = new Keyboard(mActivity, keyBoardXmlResId);
// Attach the keyboard to the view
mKeyboardView.setKeyboard(mKeyboard);
// Do not show the preview balloons
mKeyboardView.setPreviewEnabled(false);
KeyboardView.OnKeyboardActionListener keyboardListener = new KeyboardView.OnKeyboardActionListener() {
@Override
public void onKey(int primaryCode, int[] keyCodes) {
// Get the EditText and its Editable
View focusCurrent = mActivity.getWindow().getCurrentFocus();
if (focusCurrent == null || !(focusCurrent instanceof EditText)) {
return;
}
EditText edittext = (EditText) focusCurrent;
Editable editable = edittext.getText();
int start = edittext.getSelectionStart();
// Handle key
if (primaryCode == Constant.CodeCancel) {
hideCustomKeyboard();
} else if (primaryCode == Constant.CodeDelete) {
if (editable != null && start > 0) {
editable.delete(start - 1, start);
}
} else {
// Insert character
editable.insert(start, Character.toString((char) primaryCode));
}
}
@Override
public void onPress(int arg0) {
}
@Override
public void onRelease(int primaryCode) {
}
@Override
public void onText(CharSequence text) {
}
@Override
public void swipeDown() {
}
@Override
public void swipeLeft() {
}
@Override
public void swipeRight() {
}
@Override
public void swipeUp() {
}
};
mKeyboardView.setOnKeyboardActionListener(keyboardListener);
}
//綁定一個EditText
public void registerEditText(EditText editText) {
// Make the custom keyboard appear
editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus) {
showCustomKeyboard(v);
} else {
hideCustomKeyboard();
}
}
});
editText.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick");
showCustomKeyboard(v);
}
});
editText.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.d(TAG, "onTouch");
EditText edittext = (EditText) v;
int inType = edittext.getInputType(); // Backup the input type
edittext.setInputType(InputType.TYPE_NULL); // Disable standard keyboard
edittext.onTouchEvent(event); // Call native handler
edittext.setInputType(inType); // Restore input type
edittext.setSelection(edittext.getText().length());
return true;
}
});
}
public void hideCustomKeyboard() {
mKeyboardView.setVisibility(View.GONE);
mKeyboardView.setEnabled(false);
}
public void showCustomKeyboard(View v) {
mKeyboardView.setVisibility(View.VISIBLE);
mKeyboardView.setEnabled(true);
if (v != null) {
((InputMethodManager) mActivity.getSystemService(Activity.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(v.getWindowToken(), 0);
}
}
public boolean isCustomKeyboardVisible() {
return mKeyboardView.getVisibility() == View.VISIBLE;
}
}3.最后是主Activity的代碼，這里就很簡單了。
/**
* 自定義安全輸入法
*/
public class MainActivity extends ActionBarActivity {
private KeyboardBuilder builder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
KeyboardView keyboardView = (KeyboardView) findViewById(R.id.keyboardview);
builder = new KeyboardBuilder(this, keyboardView, R.xml.keys_layout);
EditText editText = (EditText) findViewById(R.id.input_password);
builder.registerEditText(editText);
EditText editText2 = (EditText) findViewById(R.id.input_password2);
builder.registerEditText(editText2);
}
@Override
public void onBackPressed() {
if (builder != null && builder.isCustomKeyboardVisible()) {
builder.hideCustomKeyboard();
} else {
this.finish();
}
}
}看完上述內(nèi)容是否對您有幫助呢？如果還想對相關(guān)知識有進一步的了解或閱讀更多相關(guān)文章，請關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道，感謝您對創(chuàng)新互聯(lián)的支持。
