Android(安卓)自定义可编辑可任意全屏拖动的EditText

前言
在开发中，有一种需求，需要一种EditText可拖动并且可编辑，在失去焦点时，变成TextView,获取焦点时，可编辑，查阅好多资料，最终完成，由于开发时间比较紧，只做个笔记

效果图：
1.自定义View

import android.content.Context;import android.graphics.Paint;import android.text.Editable;import android.text.TextPaint;import android.text.TextWatcher;import android.util.AttributeSet;import android.view.Gravity;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.ViewConfiguration;import android.view.ViewGroup;import android.widget.EditText;import android.widget.LinearLayout;import com.xinrui.guestservice.R;import com.xinrui.guestservice.utils.ToolUtils;public class DragLayout extends LinearLayout {    private int lastX, lastY;    private int parentWidth, parentHeight;    private DragEditText mEditText;    private Context mContext;    private View mTypefaceView;    private LayoutInflater inflater;    private ToolUtils mToolUtils;    public DragLayout(Context context) {        this(context, null);    }    public DragLayout(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public DragLayout(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        this.mContext=context;        mToolUtils = ToolUtils.getInstance(mContext);        inflater = LayoutInflater.from(context);        init();    }    private void init() {        setEditTextAttr(20,"请输入内容");    }    public int dptopx( float dpValue){        final float scale = mContext.getResources().getDisplayMetrics().density;        return (int) (dpValue * scale + 0.5f);    }    public void setEditTextAttr(int textsize,String text){        mTypefaceView=inflater.inflate(R.layout.edt_layout,null);        int height = dptopx((float)((textsize + 0.00000007)/0.7535))+textsize;        mEditText = new DragEditText(getContext());        Paint mTextPaint = mEditText.getPaint();        mTextPaint.setTextSize(textsize);        int width = dptopx(mTextPaint.measureText(text))+textsize;        //初始化控件的布局        if(mToolUtils.isScreenOriatationPortrait()) {            setX((1080 - width) / 2);            setY((1920 - height) / 2);        }else{            setX((1920 - width) / 2);            setY((1080 - height) / 2);        }        LinearLayout.LayoutParams mEdtlayoutParams = new LinearLayout.LayoutParams(width,LayoutParams.WRAP_CONTENT);        mEditText.setLayoutParams(mEdtlayoutParams);        int padding = textsize/10;        mEditText.setPadding(-padding,-padding,-padding,-padding);        mEditText.setText(text);        mEditText.setGravity(Gravity.LEFT|Gravity.CENTER_VERTICAL);        mEditText.setTextSize(textsize);        mEditText.setTextColor(getContext().getResources().getColor(R.color.colorWhite));        mEditText.setBackground(null);        addView(mEditText);        LinearLayout.LayoutParams mViewlayoutParams = new LinearLayout.LayoutParams(width, 55);        mViewlayoutParams.topMargin=5;        mTypefaceView.setLayoutParams(mViewlayoutParams);        mEditText.addTextChangedListener(new TextWatcher() {            @Override            public void beforeTextChanged(CharSequence s, int start, int count, int after) {            }            @Override            public void onTextChanged(CharSequence s, int start, int before, int count) {            }            @Override            public void afterTextChanged(Editable s) {                String value = s.toString().trim();                TextPaint mTextPaint = mEditText.getPaint();                mTextPaint.setTextSize(mEditText.getTextSize());                int mTextViewWidth = (int) mTextPaint.measureText(value);                int width = mEditText.getWidth();                if (mTextViewWidth > width) {                    LinearLayout.LayoutParams mEdtlayoutParams = new LinearLayout.LayoutParams(mTextViewWidth, LayoutParams.WRAP_CONTENT);                    mEditText.setLayoutParams(mEdtlayoutParams);                    LinearLayout.LayoutParams mViewlayoutParams = new LinearLayout.LayoutParams(mTextViewWidth, 55);                    mViewlayoutParams.topMargin=5;                    mTypefaceView.setLayoutParams(mViewlayoutParams);                    DragLayout.this.invalidate();                }            }        });        mEditText.setOnFocusChangeListener(new OnFocusChangeListener() {            @Override            public void onFocusChange(View v, boolean hasFocus) {                if(hasFocus){                    mEditText.setBackgroundResource(R.drawable.edit_bg);                    addView(mTypefaceView);                }else{                    mEditText.setBackground(null);                    removeView(mTypefaceView);                }            }        });    }    @Override    public boolean onInterceptTouchEvent(MotionEvent ev) {        if (ev.getAction() == MotionEvent.ACTION_DOWN) {            lastX = (int) ev.getRawX();            lastY = (int) ev.getRawY();            return false;        }else if(ev.getAction()==MotionEvent.ACTION_UP){            return false;        }        return true;    }    @Override    public boolean onTouchEvent(MotionEvent event) {        switch (event.getAction()) {            case MotionEvent.ACTION_MOVE:                int deltaX = (int) event.getRawX() - lastX;                int deltaY = (int) event.getRawY() - lastY;                if (parentWidth == 0) {                    ViewGroup mViewGroup = (ViewGroup) getParent();                    parentWidth = mViewGroup.getWidth();                    parentHeight = mViewGroup.getHeight();                }                if (getTranslationX() < -getLeft() && deltaX < 0) deltaX = 0;                else if (getTranslationX() > (parentWidth - getRight()) && deltaX > 0) deltaX = 0;                if (getTranslationY() < -getTop() && deltaY < 0) deltaY = 0;                else if (getTranslationY() > (parentHeight - getBottom()) && deltaY > 0) deltaY = 0;                setTranslationX(getTranslationX() + deltaX);                setTranslationY(getTranslationY() + deltaY);                lastX = (int) event.getRawX();                lastY = (int) event.getRawY();                break;            case MotionEvent.ACTION_UP:                break;        }        return true;    }    private static class DragEditText extends EditText{        private int downX, downY;        public DragEditText(Context context) {            super(context);        }        public DragEditText(Context context, AttributeSet attrs) {            super(context, attrs);        }        public DragEditText(Context context, AttributeSet attrs, int defStyleAttr) {            super(context, attrs, defStyleAttr);        }        @Override        public boolean dispatchTouchEvent(MotionEvent event) {            switch (event.getAction()) {                case MotionEvent.ACTION_DOWN:                    downX = (int) event.getRawX();                    downY = (int) event.getRawY();                    getParent().requestDisallowInterceptTouchEvent(true);                    break;                case MotionEvent.ACTION_MOVE:                    int upX = (int) event.getRawX() - downX;                    int upY = (int) event.getRawY() - downY;                    if (Math.abs(upX) <= ViewConfiguration.get(getContext()).getScaledTouchSlop() && Math.abs(upY) <= ViewConfiguration.get(getContext()).getScaledTouchSlop()) {                        getParent().requestDisallowInterceptTouchEvent(true);                    } else {                        getParent().requestDisallowInterceptTouchEvent(false);                    }                    break;            }            return super.dispatchTouchEvent(event);        }        @Override        protected void onSelectionChanged(int selStart, int selEnd) {            super.onSelectionChanged(selStart, selEnd);            //保证光标始终在最后面            if (selStart == selEnd) {//防止不能多选                setSelection(getText().length());            }        }    }}

2.Activity 部分代码

import android.app.Activity;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.view.MotionEvent;import android.view.inputmethod.InputMethodManager;import android.widget.RelativeLayout;import com.xinrui.guestservice.view.DragLayout;public class DisplayActivity extends Activity {    private DragLayout mDragLayout;    private RelativeLayout main_area;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.display_layout);        init();    }    private void init(){        main_area = (RelativeLayout)findViewById(R.id.main_area);        mDragLayout=(DragLayout)findViewById(R.id.drag_area);        int imageid = getIntent().getIntExtra("image", -1);        if (imageid != -1) {            main_area.setBackgroundResource(imageid);        } else {            String imagepath = getIntent().getStringExtra("imagepath");            Bitmap bitmap = BitmapFactory.decodeFile(imagepath);            Drawable drawable = new BitmapDrawable(bitmap);            main_area.setBackground(drawable);        }    }    @Override    public boolean onTouchEvent(MotionEvent event) {    //EditText失去焦点时，隐藏输入法        InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);        if (event.getAction() == MotionEvent.ACTION_DOWN) {            if (getCurrentFocus() != null) {                if (getCurrentFocus().getWindowToken() != null) {                    imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);                    mDragLayout.clearFocus();                }            }        }        return super.onTouchEvent(event);    }}

3.display_layout.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/main_area"    android:focusableInTouchMode="true"    android:layout_width="match_parent"    android:layout_height="match_parent">    <com.xinrui.guestservice.view.DragLayout        android:id="@+id/drag_area"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="vertical">    </com.xinrui.guestservice.view.DragLayout></RelativeLayout>

4.ToolUtils类

import android.content.Context;import android.content.res.Configuration;import android.content.res.Resources;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Paint;import android.graphics.Rect;import android.util.Log;import android.view.View;import android.widget.Toast;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.QRCodeWriter;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import com.xinrui.guestservice.R;import com.xinrui.guestservice.entity.PictureInfo;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Locale;import java.util.Map;public class ToolUtils {    private static ToolUtils toolUtils;    private Context mContext;    private ArrayList<String> paint_list = null;    private ArrayList<PictureInfo> fileItemList;    private ToolUtils(Context context) {        mContext = context.getApplicationContext();        paint_list = new ArrayList<>();        fileItemList = new ArrayList<>();    }    public static ToolUtils getInstance(Context context) {        if (toolUtils == null) {            toolUtils = new ToolUtils(context);        }        return toolUtils;    }    public boolean isScreenOriatationPortrait() {        return mContext.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;    }    public int dptopx( float dpValue){        final float scale = mContext.getResources().getDisplayMetrics().density;        return (int) (dpValue * scale + 0.5f);    }}

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