RecyclerView线性布局和网格布局的切换

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点击图片的背景：

drawable包下的文件：item.xml文件

<selector xmlns:android="http://schemas.android.com/apk/res/android">    <item  android:state_checked="true" android:drawable="@drawable/kind_grid"></item>    <item  android:state_checked="false" android:drawable="@drawable/kind_liner"></item></selector>

main的布局：

    <CheckBox                        android:button="@null"                        android:id="@+id/iv_msg"                        android:layout_width="30dp"                        android:layout_height="20dp"                        android:background="@drawable/item2"                        />  <android.support.v7.widget.RecyclerView      android:id="@+id/lv"      android:layout_width="match_parent"      android:layout_height="match_parent"></android.support.v7.widget.RecyclerView></LinearLayout>

主要的逻辑上代码：

    private boolean flag=false;    private SelectRelAdapter selectRelAdapter;    private CheckBox img;  mLv =  findViewById(R.id.lv);  img= findViewById(R.id.iv_msg);   img.setChecked(flag);        img.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {             if(flag){                adapter();                  img.setChecked(false);                  flag=img.isChecked();             }else {                  adapter1();                 img.setChecked(true);                 flag=img.isChecked();             }            }        });        if(img.isChecked()){            adapter();        }else {            adapter1();        }  private void  adapter(){        mLv.setLayoutManager(new LinearLayoutManager(this));        SelectRelAdapter selectRelAdapter = new SelectRelAdapter(data, this);        mLv.setAdapter(selectRelAdapter);        selectRelAdapter.setOnItemClickLitener(new SelectRelAdapter.OnItemClickLitener() {            @Override            public void onItemClick(View view, int position) {                int pid = data.get(position).getPid();                Intent intent = new Intent(SelectActivity.this, XQActivity.class);                intent.putExtra("pid",pid+"");                startActivity(intent);            }        });    }    private void  adapter1(){        mLv.setLayoutManager(new GridLayoutManager(this,2));        selectRelAdapter = new SelectRelAdapter(data, this);        mLv.setAdapter(selectRelAdapter);        selectRelAdapter.setOnItemClickLitener(new SelectRelAdapter.OnItemClickLitener() {            @Override            public void onItemClick(View view, int position) {                int pid = data.get(position).getPid();                Intent intent = new Intent(SelectActivity.this, XQActivity.class);                intent.putExtra("pid",pid+"");                startActivity(intent);            }        });    }

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