Android 实现聊天窗口输入框弹起

实现效果往下滑会加载历史数据

1.在清单文件中设置

   <activity
            android:configChanges="keyboardHidden|screenSize|orientation"
            android:screenOrientation="userPortrait"
            android:name=".cs.CSActivity"
             />

2.xml文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:layout_marginTop="@dimen/dp_100" xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:orientation="vertical">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recyclerView_chat"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:overScrollMode="never"
            android:scrollbars="vertical"/>
        <TextView
            android:visibility="gone"
            android:id="@+id/top_text"
            android:background="@color/white"
            android:text="加载中"
            android:layout_centerHorizontal="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
    </RelativeLayout>

    <LinearLayout
        android:id="@+id/bottom_layout"
        android:layout_width="match_parent"
        android:layout_height="55dp"
        android:orientation="horizontal">
        <FrameLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1">
            <EditText
                android:id="@+id/editText_message"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:hint="输入消息内容"
                android:padding="10dp" />
            <LinearLayout
                android:id="@+id/layout_edit"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"/>
        </FrameLayout>

        <Button
            android:id="@+id/btn_send"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:text="发送" />
    </LinearLayout>
</LinearLayout>

3.代码文件

public class CSFragment2 extends BaseMVPFragment<CSPresenter> implements CSContract.View {

    @BindView(R.id.recyclerView_chat)
    RecyclerView recyclerView;
    @BindView(R.id.editText_message)
    EditText editText_message;
    @BindView(R.id.layout_edit)
    LinearLayout layout_edit;

    @BindView(R.id.btn_send)
    Button btn_send;
    @BindView(R.id.top_text)
    TextView top_text;
    public static CSFragment2 getInstance() {
        CSFragment2 fragment = new CSFragment2();
        Bundle bundle = new Bundle();
        fragment.setArguments(bundle);
        return fragment;
    }

    Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what){
                case 0:
                    recyclerView.scrollToPosition(homeList.getData().size()-1);
                    break;
            }
        }

    };


    @Override
    protected void initInject() {
        getFragmentComponent().inject(this);
    }

    @Override
    protected int getLayout() {
        return R.layout.scxm_fragment_cs2;
    }

    List<HomeBean2> data = new ArrayList<>();
    public HomeListAdapter2 homeList;
    public LinearLayoutManager linear;
    public int posint;
    @Override
    protected void initEventAndData() {
        linear = new LinearLayoutManager(getActivity());
        linear.setStackFromEnd(true);
        recyclerView.setLayoutManager(linear);
        recyclerView.setAdapter(homeList = new HomeListAdapter2(data,getActivity()));
        for (int i = 0; i <10 ; i++) {
            HomeBean2 homeBean2 = new HomeBean2();
            homeBean2.setContext("66666");
            homeBean2.setItem_type(3);
            homeList.addData(homeBean2);
        }
        linear.scrollToPosition(homeList.getData().size()-1);
        homeList.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
            @Override
            public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
                switch (view.getId()){
//                    case R.id.ed_bottom:
//                        break;
                }
            }
        });




        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                // canScrollVertically(1) 为false 的时候滑动到底部了
                if (!recyclerView.canScrollVertically(1)) {
//                    Toast.makeText(MainActivity.this, "滑动到底部了", Toast.LENGTH_SHORT)
//                            .show();
                }
                // canScrollVertically(-1) 为false 的时候滑动到顶部了
                if (!recyclerView.canScrollVertically(-1)) {
                    top_text.setVisibility(View.VISIBLE);
                    List<HomeBean2> homeList2 = new  ArrayList<>();
                    for (int i = 0; i <10 ; i++) {
                        HomeBean2 homeBean2 = new HomeBean2();
                        homeBean2.setContext("cccccc"+i);
                        homeBean2.setItem_type(3);
                        homeList2.add(homeBean2);
                    }
                    homeList.addData(0,homeList2);
                    top_text.setVisibility(View.GONE);
                }
            }
        });

        btn_send.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                HomeBean2 homeBean2 = new HomeBean2();
                homeBean2.setContext(editText_message.getText().toString());
                homeBean2.setItem_type(2);
                homeList.addData(homeBean2);
                linear.scrollToPosition(homeList.getData().size()-1);
                editText_message.setText("");
            }
        });

        layout_edit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                editText_message.requestFocus();
                showSoftInput(getActivity(),editText_message);
                handler.sendEmptyMessageDelayed(0,250);
            }
        });

        recyclerView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                hideSoftInput(getActivity(), editText_message);
                return false;
            }
        });


    }

    public static void showSoftInput(Context context, View view) {
        InputMethodManager imm = (InputMethodManager) context.getSystemService(Activity.INPUT_METHOD_SERVICE);
        imm.showSoftInput(view, InputMethodManager.SHOW_FORCED);
    }

    public static void hideSoftInput(Context context, View view) {
        InputMethodManager imm = (InputMethodManager) context.getSystemService(Activity.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(view.getWindowToken(), 0);

    }

}

3.适配器

public class HomeListAdapter2 extends BaseMultiItemQuickAdapter<HomeBean2, BaseViewHolder> {
    Activity activity;
    public HomeListAdapter2(List<HomeBean2> data, Activity activity) {
        super(data);
        addItemType(1, R.layout.scxm_my_home_list_item1);
        addItemType(2, R.layout.scxm_my_home_list_item2);
        addItemType(3, R.layout.scxm_my_home_list_item3);
        this.activity = activity;
    }



    @SuppressLint("NewApi")
    @Override
    protected void convert(BaseViewHolder helper, HomeBean2 item) {
        switch (helper.getItemViewType()){
            case 1:
                helper.setText(R.id.left_tv,item.getContext());
                break;
            case 2:
                helper.setText(R.id.right_tv,item.getContext());
                break;
            case 3:
                helper.setText(R.id.left_tv,item.getContext());
                helper.setText(R.id.left_tv2,item.getBottom_text());
                helper.addOnClickListener(R.id.left_tv3);
                break;
        }
//        LoadImageUtils.glideLoadImage(mContext, item.getCreationContent(), 0, helper.getView(R.id.top_image));

    }


}

4.item布局1

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:orientation="horizontal"
    android:layout_marginTop="@dimen/dp_5"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/layout"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dp_89">
    <ImageView
        android:id="@+id/left_image"
        android:src="@mipmap/right_icon2"
        android:layout_width="@dimen/dp_40"
        android:layout_height="@dimen/dp_40"/>
    <TextView
        android:id="@+id/left_tv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</LinearLayout>

item布局2

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:gravity="right"
    android:orientation="horizontal"
    android:layout_marginTop="@dimen/dp_5"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/layout"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dp_89">

    <TextView
        android:layout_marginLeft="@dimen/dp_60"
        android:gravity="right"
        android:textColor="@color/white"
        android:text="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
        android:id="@+id/right_tv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
    <ImageView
        android:id="@+id/right_img"
        android:src="@mipmap/right_icon2"
        android:layout_width="@dimen/dp_40"
        android:layout_height="@dimen/dp_40"/>
</LinearLayout>

item布局3

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    android:orientation="horizontal"
    android:layout_marginTop="@dimen/dp_5"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/layout"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dp_89">
    <ImageView
        android:id="@+id/left_img"
        android:src="@mipmap/right_icon2"
        android:layout_width="@dimen/dp_40"
        android:layout_height="@dimen/dp_40"/>

    <TextView
        android:id="@+id/left_tv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/left_img"
        android:text="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
        android:textColor="@color/white" />
    <LinearLayout
        android:id="@+id/top_layout"
        android:layout_alignLeft="@+id/left_tv"
        android:layout_below="@+id/left_tv"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:textColor="@color/white"
            android:text="aaaaaaaaaaaaaaaaaaaaaaa"
            android:id="@+id/left_tv2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
        <TextView
            android:textColor="@color/white"
            android:text="忘记密码？"
            android:id="@+id/left_tv3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </LinearLayout>

</RelativeLayout>

原文链接：https://blog.csdn.net/qq_15059163/article/details/128280359

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