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Android—简单的仿QQ聊天界面

时间:2016-06-02 17:59:04      阅读:235      评论:0      收藏:0      [点我收藏+]

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最近仿照QQ聊天做了一个类似界面,先看下界面组成(画面不太美凑合凑合呗,,,,):

技术分享

    其中聊天背景可以是一个LinearLayout或者RelativeLayout里面存放的是ListView(将ListView的分割线设置成透明:android:divider="#0000"否则聊天界面会显示出分割线,,,想想都屌,,,)

   于是,我要上主界面的xml布局文件了:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#c2c2c2"
    android:orientation="vertical"
    android:padding="16dp" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/activity_horizontal_margin"
        android:layout_weight="1"
        android:background="@drawable/app_lvjian_rbtn_normal_background"
        android:orientation="vertical"
        android:padding="8dp" >

        <ListView
            android:id="@+id/lv_chat_dialog"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:divider="#0000"
            android:dividerHeight="8dp"
            android:scrollbars="none" >
        </ListView>
    </LinearLayout>
   

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="32dp"
        android:layout_marginTop="8dp"
        android:orientation="horizontal" >

        <EditText
            android:id="@+id/et_chat_message"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:textSize="14sp"
            android:background="@drawable/app_lvjian_rbtn_normal_background"
            android:gravity="center|left"
            android:padding="8dp" />

        <Button
            android:id="@+id/btn_chat_message_send"
            style="?android:attr/buttonStyleSmall"
            android:layout_width="64dp"
            android:layout_marginLeft="8dp"
            android:layout_height="match_parent"
            android:layout_gravity="center|right"
            android:layout_marginRight="4dp"
            android:background="@drawable/app_lvjian_chat_sends" />
    </LinearLayout>

</LinearLayout>

 完了就会出现下图:

技术分享

于是该为ListView设置条目了,就是咱们聊天的消息了!

技术分享

    由图可以看出要为ListView设置两个item文件,(头像和气泡的位置,方向,都不一样)其中气泡一定是.9png的否则会失真的。

    左边的item:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/ivicon"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_gravity="top"
        android:src="@drawable/app_lvjian_message_background" />

    <TextView
        android:id="@+id/tvname"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:padding="8dp"
        android:background="@drawable/app_lvjian_other_chat_background"
        android:text="权志龙好帅!!!" />

</LinearLayout>

 右边的item

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/tv_chat_me_message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="8dp"
        android:layout_marginTop="8dp"
        android:layout_toLeftOf="@+id/iv_chat_imagr_right"
        android:background="@drawable/app_lvjian_chat_right"
        android:padding="8dp"
        android:text="把那些贩毒的关到小黑屋,枪毙五十次,快去" />

    <ImageView
        android:id="@+id/iv_chat_imagr_right"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_alignParentRight="true"
        android:layout_gravity="top"
        android:src="@drawable/app_lvjian_message_background" />

</RelativeLayout>

     接下来还要为LiseView设置Adapter,发送消息时候有姓名,聊天内容等,我把这些元素封装了一个实体类先贴出来(Adapter会用到的):

package com.example.mychattext;

public class PersonChat {
	/**
	 * id
	 */
	private int id;
	/**
	 * 姓名
	 */
	private String name;
	/**
	 * 聊天内容
	 */
	private String chatMessage;
	/**
	 * 
	 * @return 是否为本人发送
	 */
    private boolean isMeSend;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getChatMessage() {
		return chatMessage;
	}
	public void setChatMessage(String chatMessage) {
		this.chatMessage = chatMessage;
	}
	public boolean isMeSend() {
		return isMeSend;
	}
	public void setMeSend(boolean isMeSend) {
		this.isMeSend = isMeSend;
	}
	public PersonChat(int id, String name, String chatMessage, boolean isMeSend) {
		super();
		this.id = id;
		this.name = name;
		this.chatMessage = chatMessage;
		this.isMeSend = isMeSend;
	}
	public PersonChat() {
		super();
	}
	

}

 自定义的Adapter加载布局文件的时候需要判断是哪方发送的消息来决定用哪个item布局文件,看Adapter:

package com.example.mychattext;

import java.util.List;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class ChatAdapter extends BaseAdapter {
	private Context context;
	private List<PersonChat> lists;

	public ChatAdapter(Context context, List<PersonChat> lists) {
		super();
		this.context = context;
		this.lists = lists;
	}

	/**
	 * 是否是自己发送的消息
	 * 
	 * @author cyf
	 * 
	 */
	public static interface IMsgViewType {
		int IMVT_COM_MSG = 0;// 收到对方的消息
		int IMVT_TO_MSG = 1;// 自己发送出去的消息
	}

	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		return lists.size();
	}

	@Override
	public Object getItem(int arg0) {
		// TODO Auto-generated method stub
		return lists.get(arg0);
	}

	@Override
	public long getItemId(int arg0) {
		// TODO Auto-generated method stub
		return arg0;
	}

	/**
	 * 得到Item的类型,是对方发过来的消息,还是自己发送出去的
	 */
	public int getItemViewType(int position) {
		PersonChat entity = lists.get(position);

		if (entity.isMeSend()) {// 收到的消息
			return IMsgViewType.IMVT_COM_MSG;
		} else {// 自己发送的消息
			return IMsgViewType.IMVT_TO_MSG;
		}
	}

	@Override
	public View getView(int arg0, View arg1, ViewGroup arg2) {
		// TODO Auto-generated method stub
		HolderView holderView = null;
		PersonChat entity = lists.get(arg0);
		boolean isMeSend = entity.isMeSend();
		if (holderView == null) {
			holderView = new HolderView();
			if (isMeSend) {
				arg1 = View.inflate(context, R.layout.chat_dialog_right_item,
						null);
				holderView.tv_chat_me_message = (TextView) arg1
						.findViewById(R.id.tv_chat_me_message);
				holderView.tv_chat_me_message.setText(entity.getChatMessage());
			} else {
				arg1 = View.inflate(context, R.layout.chat_dialog_left_item,
						null);

			}
			arg1.setTag(holderView);
		} else {
			holderView = (HolderView) arg1.getTag();
		}

		return arg1;
	}

	class HolderView {
		TextView tv_chat_me_message;
	}

	@Override
	public boolean isEnabled(int position) {
		return false;
	}
}

 区分消息发送方重点在IMsgViewType、getItemViewType、getView方法中,注释很详细,相信大家可以理解

最后是注释详细的MAinActivity:

package com.example.mychattext;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {
	private ChatAdapter chatAdapter;
	/**
	 * 声明ListView
	 */
	private ListView lv_chat_dialog;
	/**
	 * 集合
	 */
	private List<PersonChat> personChats = new ArrayList<PersonChat>();
	private Handler handler = new Handler() {
		public void handleMessage(android.os.Message msg) {
			int what = msg.what;
			switch (what) {
			case 1:
				/**
				 * ListView条目控制在最后一行
				 */
				lv_chat_dialog.setSelection(personChats.size());
				break;

			default:
				break;
			}
		};
	};

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);
		/**
		 * 虚拟4条发送方的消息
		 */
		for (int i = 0; i <= 3; i++) {
			PersonChat personChat = new PersonChat();
			personChat.setMeSend(false);
			personChats.add(personChat);
		}
		lv_chat_dialog = (ListView) findViewById(R.id.lv_chat_dialog);
		Button btn_chat_message_send = (Button) findViewById(R.id.btn_chat_message_send);
		final EditText et_chat_message = (EditText) findViewById(R.id.et_chat_message);
		/**
		 *setAdapter
		 */
		chatAdapter = new ChatAdapter(this, personChats);
		lv_chat_dialog.setAdapter(chatAdapter);
		/**
		 * 发送按钮的点击事件
		 */
		btn_chat_message_send.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				if (TextUtils.isEmpty(et_chat_message.getText().toString())) {
					Toast.makeText(MainActivity.this, "发送内容不能为空", 0).show();
					return;
				}
				PersonChat personChat = new PersonChat();
				//代表自己发送
				personChat.setMeSend(true);
				//得到发送内容
				personChat.setChatMessage(et_chat_message.getText().toString());
				//加入集合
				personChats.add(personChat);
				//清空输入框
				et_chat_message.setText("");
				//刷新ListView
				chatAdapter.notifyDataSetChanged();
				handler.sendEmptyMessage(1);
			}
		});
	}

}

 源码连接:https://yunpan.cn/cS4CAwunXBfYt  访问密码 82eb

Android—简单的仿QQ聊天界面

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原文地址:http://www.cnblogs.com/yunfang/p/5553629.html

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