Toolbar

ToolBar initialization

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolBar);
        toolbar.setTitle("");
        setSupportActionBar(toolbar);

        // Set up App Logo
        toolbar.setLogo(R.mipmap.dog);


        // Set Menu
        toolbar.inflateMenu(R.menu.menu);

        /**
            To use menu, you need to override the onCreateOptionsMenu() method
            To listen to Menu, you need to override the onoptionsiteselected() method
                                                        */

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RecyclerView

Enter the application default display list mode for the first time

        adapter = new MyAdapter(this,R.layout.list_item,models);

        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

        mRecyclerView.setAdapter(adapter);

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Click menu of toolbar to switch modes, and make logical judgment in the method of monitoring menu of toolbar

        /** Define a variable to hold the current state */

        switch (item.getItemId()){
            case R.id.item:

                /** Two constants are defined, meaning list mode and grid mode respectively */
                if(currentMode == MODE_GRID){

                    /** Dynamically replace the icon and change the current mode */
                    item.setIcon(R.mipmap.list);
                    currentMode = MODE_LIST;

                    /** Call the method in the adapter to refactor the layout and reset the adapter */
                    adapter.reBuildLayout(R.layout.grid_item);
                    mRecyclerView.setLayoutManager(new GridLayoutManager(this,2));
                    mRecyclerView.setAdapter(adapter);

                }else if(currentMode == MODE_LIST){

                    item.setIcon(R.mipmap.grid0);
                    currentMode = MODE_GRID;

                    adapter.reBuildLayout(R.layout.list_item);
                    mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
                    mRecyclerView.setAdapter(adapter);

                }


                break;

        }

        return super.onOptionsItemSelected(item);

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Reconfiguration layout method in adapter

    public void reBuildLayout(int layoutId){

        this.mLayoutResId = layoutId;

        notifyDataSetChanged();

    }

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Design sketch

······

/**The above effect is the optimized effect

            1. Added split line
            2. Save the current position when switching

                                    */

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Source code

Full effect version code

---------------------This article is from the CSDN blog of Konfyt_Android. For the full address, please click: https://blog.csdn.net/Konfyt_Android/article/details/52734866?utm_source=copy