一. 微信分享的实现：

1.到微信开放平台 https://open.weixin.qq.com  创创建应用申请AppID

2.下载签名生成工具，对签名不了解的自行百度，这里不做说明。

下面是简单的微信分享代码：

首先看一下包结构图

MainActivity:

public class MainActivity extends Activity {
    private static final String appid = "wx86b3d972e5ddd153";
    private IWXAPI wxApi;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        wxApi = WXAPIFactory.createWXAPI(this, appid);  
        wxApi.registerApp(appid); 
        
        
    }

 private void share(int flag){
        WXWebpageObject webpage = new WXWebpageObject();
        webpage.webpageUrl = "http://blog.csdn.net/yeyuehei/article/details/28854667";
        WXMediaMessage msg = new WXMediaMessage(webpage);
        msg.title = "test_myblog";
        msg.description = "test_myblog";
        //这里替换一张自己工程里的图片资源
        Bitmap thumb = BitmapFactory.decodeResource(getResources(), R.drawable.rain);
        msg.setThumbImage(thumb);

        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction =buildTransaction("webpage");
        req.message = msg;
        req.scene = flag==0?SendMessageToWX.Req.WXSceneSession:SendMessageToWX.Req.WXSceneTimeline;
        boolean fla = wxApi.sendReq(req);
        System.out.println("fla="+fla);
    }

    private String buildTransaction(final String type) {
        return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis();
    }

package rain.share.wxapi;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

import com.tencent.mm.sdk.openapi.BaseReq;
import com.tencent.mm.sdk.openapi.BaseResp;
import com.tencent.mm.sdk.openapi.IWXAPI;
import com.tencent.mm.sdk.openapi.IWXAPIEventHandler;
import com.tencent.mm.sdk.openapi.WXAPIFactory;

public class WXEntryActivity extends Activity implements IWXAPIEventHandler {
    private IWXAPI api;
    // IWXAPI 是第三方app和微信通信的openapi接口
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        api = WXAPIFactory.createWXAPI(this, "wx86b3d972e5ddd153", false);
        api.handleIntent(getIntent(), this);
    }

    @Override
    public void onReq(BaseReq arg0) {
    }

    @Override
    public void onResp(BaseResp resp) {
        switch (resp.errCode) {
            case BaseResp.ErrCode.ERR_OK:
                Toast.makeText(getApplicationContext(), "分享成功", Toast.LENGTH_LONG).show();
                System.out.println("success");
                this.finish();
               // 分享成功
                break;
            case BaseResp.ErrCode.ERR_USER_CANCEL:
                //分享取消
                Toast.makeText(getApplicationContext(), "分享取消", Toast.LENGTH_LONG).show();
                System.out.println("ERR_USER_CANCEL");
                this.finish();
                break;
            case BaseResp.ErrCode.ERR_AUTH_DENIED:
                Toast.makeText(getApplicationContext(), "分享拒绝", Toast.LENGTH_LONG).show();
                System.out.println("ERR_AUTH_DENIED");
                this.finish();
                //分享拒绝
                break;
        }
    }
}  

最后我会贴出源码和签名文件的下载地址，及已经申请成功的appid号，供大家方便测试...

接下里是popWindow的使用：

1.主界面就是一个button按钮，就不填代码了.

2.popWindow界面搭建share_popwindow.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="8dp"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/view_border"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="30dp"
            android:gravity="center"
            android:text="分享"
            android:textSize="25dp" />

        <View
            android:layout_width="match_parent"
            android:layout_height="0.5dp"
            android:layout_margin="10dp"
            android:background="@android:color/holo_orange_light" />

        <Button
            android:id="@+id/first"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="5dp"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:layout_marginTop="5dp"
            android:background="@android:color/holo_blue_light"
            android:text="微信好友" />

        <Button
            android:id="@+id/second"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="5dp"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:background="@android:color/holo_blue_light"
            android:text="微信朋友圈" />
    </LinearLayout>


</LinearLayout>

3.我们这里实现popWindow从下往上出来，再点击popWindow外面，popWindow又从上往下消失

在res/下新建一个文件夹anim,进而anim下新建两个xml文件

pophidden_anim.xml    ；   popshow_anim.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 动画效果->移动动画效果  -->
    <translate
        android:duration="1000"
        android:fromYDelta="0"
        android:toYDelta="50%p" />
    <!-- 动画效果->渐变透明度动画效果   -->
    <alpha
        android:duration="1000"
        android:fromAlpha="1.0"
        android:toAlpha="0.0" />
</set>



<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="1000"
        android:fromYDelta="100%p"
        android:toYDelta="0" />

    <alpha
        android:duration="1000"
        android:fromAlpha="0.0"
        android:toAlpha="1.0" />
</set>

    <!--  sharePopWindow -->
    <style name="share_popWindow_anim_style">
        <item name="android:windowEnterAnimation">@anim/popshow_anim</item>
        <!-- 指定显示的动画xml -->
        <item name="android:windowExitAnimation">@anim/pophidden_anim</item>
        <!-- 指定消失的动画xml -->
    </style>

/**
 * 显示popupWindow
 */
private void showPopWindow() {
    //获取view
    inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view = inflater.inflate(R.layout.share_popwindow, null);

    //获取宽高
    popupWindow = new PopupWindow(view,
            WindowManager.LayoutParams.MATCH_PARENT,
            WindowManager.LayoutParams.WRAP_CONTENT);

    //设置popWindow弹出窗体可点击
    popupWindow.setFocusable(true);

    // 实例化一个ColorDrawable颜色为半透明
    ColorDrawable dw = new ColorDrawable(0xb0000000);
    popupWindow.setBackgroundDrawable(dw);

    // 设置popWindow的显示和消失动画
    popupWindow.setAnimationStyle(R.style.share_popWindow_anim_style);

    //在底部显示
    popupWindow.showAtLocation(MainActivity.this.findViewById(R.id.button),
            Gravity.BOTTOM,0,0);

    Button first = (Button) view.findViewById(R.id.first);
    Button second = (Button) view.findViewById(R.id.second);
    first.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            share(0);
            Toast.makeText(getApplicationContext(),"微信好友分享",Toast.LENGTH_LONG).show();
        }
    });
    second.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            share(1);
            Toast.makeText(getApplicationContext(),"微信朋友圈分享",Toast.LENGTH_LONG).show();
        }
    });

    //popWindow消失监听方法
    popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {

        @Override
        public void onDismiss() {
            System.out.println("popWindow消失");
        }
    });
}

好了，到此结束...大神勿喷...

源代码+打包签名文工具+打包签名密码都在一起...

代码下载地址：微信分享详解（分享到朋友和朋友圈）+ PopupWindow的使用和分析

【android】 微信分享详解（分享到朋友和朋友圈）+ PopupWindow的使用和分析