Android学习之仿QQ聊天界面的实现

界面的实现"/>

Android学习之仿QQ聊天界面的实现

前言：

好几天没动手了，感觉有点手懒了，干我们这行真的一点不能懈怠啊！

回来写了个仿扣扣聊天界面的实现，动态添加聊天内容等！

分析：

主体：RecylerView+LinearLayout

效果：

简单的模仿一下扣扣。

下面介绍一下怎么实现的

demo结构：

看起来没那么复杂哈。

主页面布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""xmlns:tools=""android:layout_width="match_parent"android:layout_height="match_parent"android:background="#EEEEEE"android:orientation="vertical"tools:context=".activity.MainActivity"><android.support.v7.widget.RecyclerView
        android:id="@+id/recylerView"android:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1" /><LinearLayout
        android:layout_width="match_parent"android:layout_height="48dp"android:background="#EEEEEE"android:orientation="horizontal"android:padding="4dp"><EditText
            android:id="@+id/et"android:layout_width="0dp"android:layout_height="match_parent"android:layout_margin="4dp"android:layout_weight="5"android:paddingLeft="4dp"android:textSize="14sp"android:background="@drawable/bg_et" /><TextView
            android:id="@+id/tvSend"android:layout_width="0dp"android:layout_height="wrap_content"android:layout_margin="4dp"android:layout_weight="1"android:background="@drawable/bg_send"android:gravity="center"android:padding="6dp"android:text="发送"android:textColor="#FFFFFF"android:textSize="10sp" /></LinearLayout>
</LinearLayout>

就是一个RecylerView+LinearLayout
适配器主要实现

 @Overridepublic ChatAdapter.BaseAdapter onCreateViewHolder(ViewGroup parent, int viewType) {switch (viewType) {case ItemModel.CHAT_A:return new ChatAViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_a, parent, false));case ItemModel.CHAT_B:return new ChatBViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_b, parent, false));}return null;}@Overridepublic void onBindViewHolder(ChatAdapter.BaseAdapter holder, int position) {holder.setData(dataList.get(position).object);}@Overridepublic int getItemViewType(int position) {return dataList.get(position).type;}@Overridepublic int getItemCount() {return dataList != null ? dataList.size() : 0;}

根据传递的不同viewType，创建两个viewHolder，对应两个不同布局。

看看数据是怎么传递的

package com.example.wangchang.testchat;import com.example.wangchang.testchat.model.ChatModel;
import com.example.wangchang.testchat.model.ItemModel;import java.util.ArrayList;/*** Created by：Administrator on 2015/12/21 16:43*/
public class TestData {public static ArrayList<ItemModel> getTestAdData() {ArrayList<ItemModel> models = new ArrayList<>();ChatModel model = new ChatModel();model.setContent("你好？我们交个朋友吧！");model.setIcon(".jpg");models.add(new ItemModel(ItemModel.CHAT_A, model));ChatModel model2 = new ChatModel();model2.setContent("我是隔壁小王，你是谁？");model2.setIcon(".jpg");models.add(new ItemModel(ItemModel.CHAT_B, model2));ChatModel model3 = new ChatModel();model3.setContent("what？你真不知道我是谁吗？哭~");model3.setIcon(".jpg");models.add(new ItemModel(ItemModel.CHAT_A, model3));ChatModel model4 = new ChatModel();model4.setContent("大哥，别哭，我真不知道");model4.setIcon(".jpg");models.add(new ItemModel(ItemModel.CHAT_B, model4));ChatModel model5 = new ChatModel();model5.setContent("卧槽，你不知道你来撩妹？");model5.setIcon(".jpg");models.add(new ItemModel(ItemModel.CHAT_A, model5));ChatModel model6 = new ChatModel();model6.setContent("你是妹子，卧槽，我怎么没看出来？");model6.setIcon(".jpg");models.add(new ItemModel(ItemModel.CHAT_B, model6));return models;}}

这里很好理解，创建两个model，itemModel对应不同的数据类型，ChatModel是聊天内容实体类。

/*** Created by WangChang on 2016/4/28.*/
public class ItemModel implements Serializable {public static final int CHAT_A = 1001;public static final int CHAT_B = 1002;public int type;public Object object;public ItemModel(int type, Object object) {this.type = type;this.object = object;}
}

圆形头像的实现，借助了CircleImageView ，其实Glide就可以实现各种圆角的图片的实现。

package com.example.wangchang.testchat.widget;import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.Uri;
import android.support.annotation.ColorRes;
import android.support.annotation.DrawableRes;
import android.util.AttributeSet;
import android.widget.ImageView;import com.example.wangchang.testchat.R;/*** 圆形图片* Created by liyingfeng on 2015/9/14.*/
public class CircleImageView extends ImageView {private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;private static final int COLORDRAWABLE_DIMENSION = 2;private static final int DEFAULT_BORDER_WIDTH = 0;private static final int DEFAULT_BORDER_COLOR = Color.BLACK;private static final boolean DEFAULT_BORDER_OVERLAY = false;private final RectF mDrawableRect = new RectF();private final RectF mBorderRect = new RectF();private final Matrix mShaderMatrix = new Matrix();private final Paint mBitmapPaint = new Paint();private final Paint mBorderPaint = new Paint();private int mBorderColor = DEFAULT_BORDER_COLOR;private int mBorderWidth = DEFAULT_BORDER_WIDTH;private Bitmap mBitmap;private BitmapShader mBitmapShader;private int mBitmapWidth;private int mBitmapHeight;private float mDrawableRadius;private float mBorderRadius;private ColorFilter mColorFilter;private boolean mReady;private boolean mSetupPending;private boolean mBorderOverlay;public CircleImageView(Context context) {super(context);init();}public CircleImageView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public CircleImageView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle, 0);mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_border_width, DEFAULT_BORDER_WIDTH);mBorderColor = a.getColor(R.styleable.CircleImageView_border_color, DEFAULT_BORDER_COLOR);mBorderOverlay = a.getBoolean(R.styleable.CircleImageView_border_overlay, DEFAULT_BORDER_OVERLAY);a.recycle();init();}private void init() {super.setScaleType(SCALE_TYPE);mReady = true;if (mSetupPending) {setup();mSetupPending = false;}}@Overridepublic ScaleType getScaleType() {return SCALE_TYPE;}@Overridepublic void setScaleType(ScaleType scaleType) {if (scaleType != SCALE_TYPE) {throw new IllegalArgumentException(String.format("ScaleType %s not supported.", scaleType));}}@Overridepublic void setAdjustViewBounds(boolean adjustViewBounds) {if (adjustViewBounds) {throw new IllegalArgumentException("adjustViewBounds not supported.");}}@Overrideprotected void onDraw(Canvas canvas) {if (getDrawable() == null) {return;}canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius, mBitmapPaint);if (mBorderWidth != 0) {canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius, mBorderPaint);}}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {super.onSizeChanged(w, h, oldw, oldh);setup();}public int getBorderColor() {return mBorderColor;}public void setBorderColor(int borderColor) {if (borderColor == mBorderColor) {return;}mBorderColor = borderColor;mBorderPaint.setColor(mBorderColor);invalidate();}public void setBorderColorResource(@ColorRes int borderColorRes) {setBorderColor(getContext().getResources().getColor(borderColorRes));}public int getBorderWidth() {return mBorderWidth;}public void setBorderWidth(int borderWidth) {if (borderWidth == mBorderWidth) {return;}mBorderWidth = borderWidth;setup();}public boolean isBorderOverlay() {return mBorderOverlay;}public void setBorderOverlay(boolean borderOverlay) {if (borderOverlay == mBorderOverlay) {return;}mBorderOverlay = borderOverlay;setup();}@Overridepublic void setImageBitmap(Bitmap bm) {super.setImageBitmap(bm);mBitmap = bm;setup();}@Overridepublic void setImageDrawable(Drawable drawable) {super.setImageDrawable(drawable);mBitmap = getBitmapFromDrawable(drawable);setup();}@Overridepublic void setImageResource(@DrawableRes int resId) {super.setImageResource(resId);mBitmap = getBitmapFromDrawable(getDrawable());setup();}@Overridepublic void setImageURI(Uri uri) {super.setImageURI(uri);mBitmap = getBitmapFromDrawable(getDrawable());setup();}@Overridepublic void setColorFilter(ColorFilter cf) {if (cf == mColorFilter) {return;}mColorFilter = cf;mBitmapPaint.setColorFilter(mColorFilter);invalidate();}private Bitmap getBitmapFromDrawable(Drawable drawable) {if (drawable == null) {return null;}if (drawable instanceof BitmapDrawable) {return ((BitmapDrawable) drawable).getBitmap();}try {Bitmap bitmap;if (drawable instanceof ColorDrawable) {bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);} else {bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG);}Canvas canvas = new Canvas(bitmap);drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());drawable.draw(canvas);return bitmap;} catch (OutOfMemoryError e) {return null;}}private void setup() {if (!mReady) {mSetupPending = true;return;}if (mBitmap == null) {return;}mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);mBitmapPaint.setAntiAlias(true);mBitmapPaint.setShader(mBitmapShader);mBorderPaint.setStyle(Paint.Style.STROKE);mBorderPaint.setAntiAlias(true);mBorderPaint.setColor(mBorderColor);mBorderPaint.setStrokeWidth(mBorderWidth);mBitmapHeight = mBitmap.getHeight();mBitmapWidth = mBitmap.getWidth();mBorderRect.set(0, 0, getWidth(), getHeight());mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2, (mBorderRect.width() - mBorderWidth) / 2);mDrawableRect.set(mBorderRect);if (!mBorderOverlay) {mDrawableRect.inset(mBorderWidth, mBorderWidth);}mDrawableRadius = Math.min(mDrawableRect.height() / 2, mDrawableRect.width() / 2);updateShaderMatrix();invalidate();}private void updateShaderMatrix() {float scale;float dx = 0;float dy = 0;mShaderMatrix.set(null);if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width() * mBitmapHeight) {scale = mDrawableRect.height() / (float) mBitmapHeight;dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;} else {scale = mDrawableRect.width() / (float) mBitmapWidth;dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;}mShaderMatrix.setScale(scale, scale);mShaderMatrix.postTranslate((int) (dx + 0.5f) + mDrawableRect.left, (int) (dy + 0.5f) + mDrawableRect.top);mBitmapShader.setLocalMatrix(mShaderMatrix);}
}

布局我就不贴了

最终效果：

感兴趣的朋友可以下载源码：