Android輸入框的聯動控制

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/** 
* 對一些含有兩個輸入框和一個確認按鈕的頁面，比如登入註冊頁面，一般是一個帳號輸入框、一個密碼輸入框、以及一個確認按鈕。
* 點擊第二個輸入框彈出鍵盤時，鍵盤常常會把確認按鈕給遮擋住，這時，我們常常要求將確認按鈕框上移至輸入框之上，以避免遮擋確認按鈕。
* 下面三個類即實現了此種功能，代碼獨立，用法簡單快捷
*
* 1. 一個輸入框時：

* new SoftInputOneEdtCtrl(your FragmentActivity).register(View viewBaseline, View viewToMove, EditText editText);

* 2. 兩個輸入框時：
* new SoftInputTwoEdtCtrl(your FragmentActivity).register(View viewBaseline, View viewToMove, EditText edt1, EditText edit2);

*/
import android.graphics.Rect;import android.os.Handler;import android.support.v4.app.FragmentActivity;import android.view.View;import android.view.View.OnLayoutChangeListener;import android.view.ViewTreeObserver.OnGlobalLayoutListener;import android.widget.EditText;public abstract class SoftInputCtrlAbs        implements OnLayoutChangeListener, OnGlobalLayoutListener, Runnable {    protected FragmentActivity mActivity;    private volatile int mNewBottom;    private volatile int mOldBottom;    protected View mViewBaseline;    protected View mViewToMove;    protected volatile boolean mHasMovedUp = false;    private Handler mHandler = new Handler();    public SoftInputCtrlAbs(FragmentActivity activity) {        mActivity = activity;        View rootView = mActivity.getWindow().findViewById(android.R.id.content);        rootView.addOnLayoutChangeListener(this);        rootView.getViewTreeObserver().addOnGlobalLayoutListener(this);    }    public void register(View viewBaseline, View viewToMove, EditText... editTexts) {        mViewToMove = viewToMove;        mViewBaseline = viewBaseline;    }    public void unregister() {        if (mActivity != null) {            View rootView = mActivity.getWindow().findViewById(android.R.id.content);            rootView.removeOnLayoutChangeListener(this);            rootView.getViewTreeObserver().removeGlobalOnLayoutListener(this);        }        reset();    }    public void postMove() {        if (mHandler != null) {            mHandler.post(this);        }    }    @Override    public void run() {        moveUp();    }    @Override    public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft,            int oldTop, int oldRight, int oldBottom) {        mNewBottom = bottom;        mOldBottom = oldBottom;    }    public int getNewBottom() {        return mNewBottom;    }    public int getOldBottom() {        return mOldBottom;    }    protected synchronized void moveUp() {        if (mViewToMove == null || mViewBaseline == null) return;        int[] locationViewBaseline = new int[2];        mViewBaseline.getLocationOnScreen(locationViewBaseline);        int[] locationViewToMove = new int[2];        mViewToMove.getLocationOnScreen(locationViewToMove);        Rect rectViewToMove = new Rect();        mViewToMove.getGlobalVisibleRect(rectViewToMove);        int moveTopDistance = rectViewToMove.bottom - locationViewBaseline[1] - mViewBaseline                .getHeight();        if (moveTopDistance > 0 || mHasMovedUp) return;        if (moveTopDistance < 0) {            mHasMovedUp = true;        }        mViewToMove.setPadding(mViewToMove.getPaddingLeft(), moveTopDistance,                mViewToMove.getPaddingRight(), mViewToMove.getPaddingBottom());    }    public void reset() {        mViewToMove = null;        mViewBaseline = null;        mNewBottom = 0;        mOldBottom = 0;        mHasMovedUp = false;        mActivity = null;    }    public void resetPosition () {        if (mViewToMove != null) {            mViewToMove.setPadding(mViewToMove.getPaddingLeft(), 0, mViewToMove.getPaddingRight(),                    mViewToMove.getPaddingBottom());            mHasMovedUp = false;        }    }}

import android.support.v4.app.FragmentActivity;import android.view.View;import android.widget.EditText;public class SoftInputOneEdtCtrl extends SoftInputCtrlAbs {    public SoftInputOneEdtCtrl(FragmentActivity activity) {        super(activity);    }    @Override    public void register(View viewBaseline, View viewToMove, EditText... editTexts) {        super.register(viewBaseline, viewToMove, editTexts);    }    @Override    public void unregister() {        super.unregister();    }    @Override    public void onGlobalLayout() {        int bottom = getNewBottom();        int oldBottom = getOldBottom();        if (bottom < oldBottom) {            postMove();        } else if (bottom > oldBottom) {            resetPosition();        }    }}

import android.support.v4.app.FragmentActivity;import android.view.KeyEvent;import android.view.View;import android.view.View.OnFocusChangeListener;import android.view.inputmethod.EditorInfo;import android.widget.EditText;import android.widget.TextView;import android.widget.TextView.OnEditorActionListener;public class SoftInputTwoEdtCtrl extends SoftInputCtrlAbs{    private static String TAG = "SoftInputTwoEdtCtrl";    private EditText mEdtFirst;    private EditText mEdtSecond;    private boolean mEdtActionNext = false;    private boolean mEdtSecondHasFocus = false;    private OnEditorActionListener mOnEditorActionListener = new OnEditorActionListener() {        @Override        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {            if (actionId == EditorInfo.IME_ACTION_NEXT) {                performActionNextEdtFirst();            }            return false;        }    };    public SoftInputTwoEdtCtrl(FragmentActivity activity) {        super(activity);    }    private synchronized void performActionNextEdtFirst() {        mEdtActionNext = true;        postMove();    }    @Override    public void register(View viewBaseline, View viewToMove, EditText... editTexts) {        super.register(viewBaseline, viewToMove, editTexts);        if ( editTexts == null|| editTexts.length != 2) return;        mEdtFirst = editTexts[0];        mEdtSecond = editTexts[1];        mEdtActionNext = false;        mEdtSecondHasFocus = false;        mEdtSecond.setOnFocusChangeListener(new OnFocusChangeListener() {            @Override            public void onFocusChange(View v, boolean hasFocus) {                mEdtSecondHasFocus = hasFocus;                postMove();            }        });        mEdtFirst.setOnEditorActionListener(mOnEditorActionListener);    }    @Override    public void onGlobalLayout() {        int bottom = getNewBottom();        int oldBottom = getOldBottom();        if (bottom < oldBottom) {            if (!mEdtSecondHasFocus) return;            postMove();        } else if (bottom > oldBottom) {            resetPosition();        } else if (mEdtActionNext && mEdtSecondHasFocus) {            mEdtActionNext = false;        }    }    @Override    public void moveUp() {        super.moveUp();    }    @Override    public void reset() {        super.reset();        mEdtFirst = null;        mEdtSecond = null;        mEdtActionNext = false;        mEdtSecondHasFocus = false;    }}

 

Android輸入框的聯動控制