1.定義全域性的布林值

boolean b=false;//實現通過判斷切換


2.實現三個檢視

 

<LinearLayout
android:id="@+id/li"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
    <Button
android:id="@+id/add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
 
android:layout_weight="1"
android:text="新增"/>
    <Button
android:id="@+id/del"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="刪除"/>
    <Button
android:id="@+id/list"
android:layout_width="wrap_content"
android:layout_height=
 
"wrap_content"
android:layout_weight="1"
android:text="List"/>
    <Button
android:id="@+id/grid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Grid"/>
    <Button
android:id="@+id/flow"
android:layout_width="wrap_content"
android
 
:layout_height="wrap_content"
android:layout_weight="1"
android:text="flow"/>
</LinearLayout>

<android.support.v7.widget.RecyclerView
android:id="@+id/id_recyclerview"
android:divider="#ffff0000"
android:dividerHeight="10dp"
android:layout_width="match_parent"
android:layout_height="match_parent" />

3.定義一個按鈕，按鈕的點選事件：

@OnClick({R.id.sel, R.id.choose})
public void onViewClicked(View view) {
    switch (view.getId()) {
        case R.id.sel:
            break;
        case R.id.choose:
            if(b==false){
                mRecyclerView.setLayoutManager(new GridLayoutManager(this,4));
                mRecyclerView.addItemDecoration(new DividerGridItemDecoration(this));
                b=true;
            }else{
                mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
                mRecyclerView.setAdapter(mAdapter = new HomeAdapter());
                mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL_LIST));
                b=false;
            }
            break;
    }
}