“ShuttleBusTime” 基于RecyclerView的小练习

第一阶段工作：http://www.cnblogs.com/hbuwyg/p/6978592.html

第二阶段工作：修改app图标，文本内容，并加入点击按钮切换方向功能。

final Button  buttonChange = (Button) findViewById(R.id.my_button) ;

        buttonChange.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
 6                 String flag = buttonChange.getText().toString();

                if(flag.equals( "本部-新区")) {
                    buttonChange.setText("新区-本部");
                    initData2();
                    initView();
                }
                if(flag.equals("新区-本部") ) {
                    buttonChange.setText("本部-新区");
                    initData();
                    initView();
                }
            }
        });

第三阶段工作：美化程序

1 RecyclerView增加分隔线

增加新类 DividerItemDecoration

package com.example.reclerviewpractice;

        import android.content.Context;
        import android.content.res.TypedArray;
        import android.graphics.Canvas;
        import android.graphics.Rect;
        import android.graphics.drawable.Drawable;
        import android.support.v7.widget.LinearLayoutManager ;
        import android.support.v7.widget.RecyclerView;
        import android.view.View;

public class DividerItemDecoration extends RecyclerView.ItemDecoration {

    private static final int[] ATTRS = new int[]{
            android.R.attr. listDivider
    };

    public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;

    public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;

    private Drawable mDivider;

    private int mOrientation;

    public DividerItemDecoration(Context context, int orientation) {
        final TypedArray a = context.obtainStyledAttributes(ATTRS );
        mDivider = a.getDrawable(0);
        a.recycle();
        setOrientation(orientation);
    }

    public void setOrientation( int orientation) {
        if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) {
            throw new IllegalArgumentException( "invalid orientation");
        }
        mOrientation = orientation;
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent) {
        if (mOrientation == VERTICAL_LIST) {
            drawVertical(c, parent);
        } else {
            drawHorizontal(c, parent);
        }
    }

    public void drawVertical(Canvas c, RecyclerView parent) {
        final int left = parent.getPaddingLeft();
        final int right = parent.getWidth() - parent.getPaddingRight();

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int top = child.getBottom() + params.bottomMargin;
            final int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    public void drawHorizontal(Canvas c, RecyclerView parent) {
        final int top = parent.getPaddingTop();
        final int bottom = parent.getHeight() - parent.getPaddingBottom();

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int left = child.getRight() + params.rightMargin;
            final int right = left + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    @Override
    public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
        if (mOrientation == VERTICAL_LIST) {
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
        }else{
            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
        }
    }
}

 2 在 MainActivity中设置，新增黄色部分代码。

    private void initView() {
        mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
        // 设置布局管理器
        mRecyclerView.setLayoutManager(mLayoutManager);
        // 设置adapter
        mRecyclerView.setAdapter(mAdapter);
        mRecyclerView.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));
    }

效果图如下：

隐藏标题栏，actionbar

requestWindowFeature(Window.FEATURE_NO_TITLE);//remove title bar  即隐藏标题栏
getSupportActionBar().hide();// 隐藏ActionBar