android側滑刪除列表

側滑lis組件

package com.shjy.jingin.ui;

import com.shjy.jingin.model.SlideItem;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ListView;

public class ListViewCompat extends ListView {

    private static final String TAG = "ListViewCompat";

    private SlideView mFocusedItemView;

    public ListViewCompat(Context context) {
        super(context);
    }

    public ListViewCompat(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ListViewCompat(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public void shrinkListItem(int position) {
        View item = getChildAt(position);

        if (item != null) {
            try {
                ((SlideView) item).shrink();
            } catch (ClassCastException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN: {
            int x = (int ) event.getX();
            int y = (int ) event.getY();
            int position = pointToPosition(x, y);
            Log. e(TAG, "postion=" + position);
            if (position != INVALID_POSITION) {
              SlideItem data = (SlideItem) getItemAtPosition(position);
                mFocusedItemView = data.slideView ;
                Log. e(TAG, "FocusedItemView=" + mFocusedItemView );
            }
        }
        default:
            break;
        }

        if (mFocusedItemView != null) {
            mFocusedItemView.onRequireTouchEvent(event);
        }

        return super .onTouchEvent(event);
    }

}

列表佈局控件

<com.shjy.jingin.ui.ListViewCompat
                    android:id="@+id/work_diary_project_list"
                    android:layout_width="match_parent"

                    android:layout_height="wrap_content"
                    android:layout_marginTop="5dp"
                    android:dividerHeight="15dp"
                    android:divider="@color/white"
                    android:visibility="gone"
                    >
                </com.shjy.jingin.ui.ListViewCompat>

側滑條控件

package com.shjy.jingin.ui;

import com.shjy.jingin.R;

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;

/**
* SlideView 繼承自LinearLayout
*/
public class SlideView extends LinearLayout {

    private static final String TAG = "SlideView";

    private Context mContext;

    // 用來放置所有view的容器
    private LinearLayout mViewContent;

    // 用來放置內置view的容器，比如刪除 按鈕
    private RelativeLayout mHolder;

    // 彈性滑動對象，提供彈性滑動效果
    private Scroller mScroller;

    // 滑動回調接口，用來向上層通知滑動事件
    private OnSlideListener mOnSlideListener;

    // 內置容器的寬度 單位：dp
    private int mHolderWidth = 60;

    // 分別記錄上次滑動的座標
    private int mLastX = 0;
    private int mLastY = 0;

    // 用來控制滑動角度，僅當角度a滿足如下條件才進行滑動：tan a = deltaX / deltaY > 2
    private static final int TAN = 2;

    public interface OnSlideListener {
        // SlideView的三種狀態：開始滑動，打開，關閉
        public static final int SLIDE_STATUS_OFF = 0;
        public static final int SLIDE_STATUS_START_SCROLL = 1;
        public static final int SLIDE_STATUS_ON = 2;

        /**
         * @param view
         *            current SlideView
         * @param status
         *            SLIDE_STATUS_ON, SLIDE_STATUS_OFF or
         *            SLIDE_STATUS_START_SCROLL
         */
        public void onSlide(View view, int status);
    }

    public SlideView(Context context) {
        super(context);
        initView();
    }

    public SlideView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView();
    }

    private void initView() {
        mContext = getContext();
        // 初始化彈性滑動對象
        mScroller = new Scroller(mContext);
        // 設置其方向爲橫向
        setOrientation(LinearLayout.HORIZONTAL);
        // 將slide_view_merge加載進來
        View.inflate(mContext, R.layout.slide_view_merge, this);
        mViewContent = (LinearLayout) findViewById(R.id.view_content);
        mHolderWidth = Math.round(TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_DIP, mHolderWidth, getResources()
                        .getDisplayMetrics()));
    }

    // 設置按鈕的內容，也可以設置圖標啥的，我沒寫
    public void setButtonText(CharSequence text) {
         TextView textView = (TextView)findViewById(R.id.delete);
         textView.setText(text);
    }

    // 將view加入到ViewContent中
    public void setContentView(View view) {
        mViewContent.addView(view);
    }

    // 設置滑動回調
    public void setOnSlideListener(OnSlideListener onSlideListener) {
        mOnSlideListener = onSlideListener;
    }

    // 將當前狀態置爲關閉
    public void shrink() {
        if (getScrollX() != 0) {
            this.smoothScrollTo(0, 0);
        }
    }

    // 根據MotionEvent來進行滑動，這個方法的作用相當於onTouchEvent
    // 如果你不需要處理滑動衝突，可以直接重命名，照樣能正常工作
    public void onRequireTouchEvent(MotionEvent event) {
        int x = (int) event.getX();
        int y = (int) event.getY();
        int scrollX = getScrollX();
        Log.d(TAG, "x=" + x + "  y=" + y);

        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN: {
            if (!mScroller.isFinished()) {
                mScroller.abortAnimation();
            }
            if (mOnSlideListener != null) {
                mOnSlideListener.onSlide(this,
                        OnSlideListener.SLIDE_STATUS_START_SCROLL);
            }
            break;
        }
        case MotionEvent.ACTION_MOVE: {
            int deltaX = x - mLastX;
            int deltaY = y - mLastY;
            if (Math.abs(deltaX) < Math.abs(deltaY) * TAN) {
                // 滑動不滿足條件，不做橫向滑動
                break;
            }

            // 計算滑動終點是否合法，防止滑動越界
            int newScrollX = scrollX - deltaX;
            if (deltaX != 0) {
                if (newScrollX < 0) {
                    newScrollX = 0;
                } else if (newScrollX > mHolderWidth) {
                    newScrollX = mHolderWidth;
                }
                this.scrollTo(newScrollX, 0);
            }
            break;
        }
        case MotionEvent.ACTION_UP: {
            int newScrollX = 0;
            // 這裏做了下判斷，當鬆開手的時候，會自動向兩邊滑動，具體向哪邊滑，要看當前所處的位置
            if (scrollX - mHolderWidth * 0.75 > 0) {
                newScrollX = mHolderWidth;
            }
            // 慢慢滑向終點
            this.smoothScrollTo(newScrollX, 0);
            // 通知上層滑動事件
            if (mOnSlideListener != null) {
                mOnSlideListener.onSlide(this,
                        newScrollX == 0 ? OnSlideListener.SLIDE_STATUS_OFF
                                : OnSlideListener.SLIDE_STATUS_ON);
            }
            break;
        }
        default:
            break;
        }

        mLastX = x;
        mLastY = y;
    }

    private void smoothScrollTo(int destX, int destY) {
        // 緩慢滾動到指定位置
        int scrollX = getScrollX();
        int delta = destX - scrollX;
        // 以三倍時長滑向destX，效果就是慢慢滑動
        mScroller.startScroll(scrollX, 0, delta, 0, Math.abs(delta) * 3);
        invalidate();
    }

    @Override
    public void computeScroll() {
        if (mScroller.computeScrollOffset()) {
            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
            postInvalidate();
        }
    }

}

列表數據模型ArrayAdapter 中的代碼

@Override
               public View getView(int position, View convertView , ViewGroup parent) {

                     ViewHolder holder;
                     側滑控件條在
                     SlideView slideView = (SlideView) convertView;
                      if (slideView == null) {
                           View itemView = LayoutInflater.from(getContext()).inflate(
                                          resource, null);
                           slideView = new SlideView(EditWorkDiaryActivity.this);
                           slideView.setContentView(itemView);

                           holder = new ViewHolder(slideView);
                           設置側滑事件的監聽器
                            slideView.setOnSlideListener(EditWorkDiaryActivity. this);
                           slideView.setTag(holder);
                     } else {
                           holder = (ViewHolder) slideView.getTag();
                     }

                     Project project = getItem(position);
                     project. slideView = slideView;
                     project. slideView.shrink();

                     holder. name.setText(project.getName());
                     holder. deleteHolder.setOnClickListener(new OnClickListener() {

                            @Override
                            public void onClick(View v) {
                                   // 這裏處理刪除按鈕的點擊事件，可以刪除對話
                                   if (v.getId() == R.id.holder) {
                                          int position = projectListView.getPositionForView(v);
                                          if (position != ListView.INVALID_POSITION ) {
                                                SelectContext. projectList.remove(position);
                                                 projectAdapter.notifyDataSetChanged();

                                                 int heighDP = getHeight(SelectContext.projectList
                                                              .size());
                                                ViewGroup.LayoutParams params = projectListView
                                                              .getLayoutParams();
                                                params. height = heighDP;
                                                 projectListView.setLayoutParams(params);
                                         }
                                         Log. e("aaaa", "onClick v=" + v);
                                  }

                           }
                     });

                     slideView.setBackgroundResource(R.drawable. rectangle);
                      return slideView;
              }
       }

          側滑事件監聽接口
        public interface OnSlideListener {
        // SlideView的三種狀態：開始滑動，打開，關閉
        public static final int SLIDE_STATUS_OFF = 0;
        public static final int SLIDE_STATUS_START_SCROLL = 1;
        public static final int SLIDE_STATUS_ON = 2;

        /**
         * @param view
         *            current SlideView
         * @param status
         *            SLIDE_STATUS_ON, SLIDE_STATUS_OFF or
         *            SLIDE_STATUS_START_SCROLL
         */
        public void onSlide(View view, int status);
    }


             @Override
        public void onSlide (View view, int status) {
               if (mLastSlideViewWithStatusOn != null
                           && mLastSlideViewWithStatusOn != view) {
                      mLastSlideViewWithStatusOn.shrink();
              }

               if (status == SLIDE_STATUS_ON) {
                      mLastSlideViewWithStatusOn = (SlideView) view;
              }
       }

 

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