Android调用系统shareAPI实现分享转发功能

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需求分析：在开发APP过程中，一般都需要实现分享转发，比如分享到QQ、微信等，这里我使用的是安卓系统自带的shareAPI，可以直接通过ResolveInfo获取手机中所有提供分享接口的应用，从而实现分享功能。

首先给大家看一下手机上的效果图：

Demo源代码下载地址：

https://download.csdn.net/download/qq15577969/10670207

一、xml布局文件

share_dialog.xml

<?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="@drawable/shape_circle_dialog_bg"
    android:orientation="vertical" >

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="16dp"
        android:text="分享到..." />

    <HorizontalScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="none" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent" >

            <GridView
                android:id="@+id/sharePopupWindow_gridView"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scrollbars="none" />
        </LinearLayout>
    </HorizontalScrollView>

    <View
        android:layout_width="match_parent"
        android:layout_height="1px"
        android:alpha="0.3"
        android:background="#666" />

    <TextView
        android:id="@+id/sharePopupWindow_close"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="20dp"
        android:text="取消"
        android:textSize="16sp" />

</LinearLayout>

appinfo_item.xml

<?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="wrap_content"
    android:gravity="center"
    android:orientation="vertical"
    android:paddingBottom="8dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:paddingTop="8dp">
    
    <ImageView
        android:id="@+id/appinfo_item_icon"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:scaleType="centerCrop"
        android:src="@drawable/ic_launcher"/>

    <TextView
        android:id="@+id/appinfo_item_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="2dp"
        android:ellipsize="end"
        android:singleLine="true"
        android:textSize="12sp"
        android:text="分享到……"/>
</LinearLayout>

在res/values/styles.xml 中，添加以下代码，用来实现弹出窗背景效果

<style name="circleDialog" parent="android:style/Theme.Dialog">
        <!-- 背景透明,设置圆角对话框必须设置背景透明，否则四角会有背景色小块-->
        <item name="android:windowBackground">@android:color/transparent</item>
        <!-- 没有标题 -->
        <item name="android:windowNoTitle">true</item>
        <!-- 背景模糊 -->
        <item name="android:backgroundDimEnabled">true</item>
</style>

二、写一个实现类AppInfo.java ,用来保存应用信息

package com.t20.sharedemo.entity;

import android.graphics.drawable.Drawable;

public class AppInfo {
	 private String pkgName;
	    private String launchClassName;
	    private String appName;
	    private Drawable appIcon;

	    public String getPkgName() {
	        return pkgName;
	    }

	    public void setPkgName(String pkgName) {
	        this.pkgName = pkgName;
	    }

	    public String getLaunchClassName() {
	        return launchClassName;
	    }

	    public void setLaunchClassName(String launchClassName) {
	        this.launchClassName = launchClassName;
	    }

	    public String getAppName() {
	        return appName;
	    }

	    public void setAppName(String appName) {
	        this.appName = appName;
	    }

	    public Drawable getAppIcon() {
	        return appIcon;
	    }

	    public void setAppIcon(Drawable appIcon) {
	        this.appIcon = appIcon;
	    }
}

三、重写PopupWindow控件，自定义分享的弹窗

SharePopupWindow.java

package com.t20.sharedemo.view;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import com.t20.sharedemo.R;
import com.t20.sharedemo.adapter.AppInfoAdapter;
import com.t20.sharedemo.entity.AppInfo;
import com.t20.sharedemo.util.ShareUtil;

import android.app.ActionBar.LayoutParams;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.ColorDrawable;
import android.net.Uri;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import android.widget.TextView;

public class SharePopupWindow extends PopupWindow {

	//每行显示多少个
	private static final int APP_SIZE = 8;
	
	private View mMenuView; 
    private GridView mGridView;
    private TextView mTextViewClose;
    private AppInfoAdapter mAdapter;
    private Intent shareIntent;
    
    private List<AppInfo> mAppinfoList;
    private List<GridView> mGridViewList;
       
    /**
     * 
     * @param context
     * @param shareContent 要分享的内容
     */
    public SharePopupWindow(final Context context,final String shareContent) {
    	super(context); 
    	LayoutInflater inflater = (LayoutInflater) context  .getSystemService(Context.LAYOUT_INFLATER_SERVICE);  
        mMenuView = inflater.inflate(R.layout.share_dialog, null); 
        //获取控件
        mGridView=(GridView) mMenuView.findViewById(R.id.sharePopupWindow_gridView);
        mTextViewClose=(TextView) mMenuView.findViewById(R.id.sharePopupWindow_close);
        //获取有分享功能的应用
        shareIntent = new Intent(Intent.ACTION_SEND);
        //shareIntent.setType("text/plain"); //纯文本 
        shareIntent.setType("*/*");  
        shareIntent.putExtra(Intent.EXTRA_TEXT, shareContent);
        mAppinfoList = ShareUtil.getShareAppList(context, shareIntent);
        
        //适配GridView
        mAdapter=new AppInfoAdapter(context, mAppinfoList);
        mGridView.setAdapter(mAdapter);
        
        //修改GridView
        changeGridView(context);
        
        mGridView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view, int position,
					long id) {
				// TODO Auto-generated method stub
				AppInfo appInfo=mAppinfoList.get(position);
				Intent intent = new Intent(Intent.ACTION_SEND);
                intent.setComponent(new ComponentName(appInfo.getPkgName(), appInfo.getLaunchClassName()));
                //intent.setType("text/plain"); //纯文本 
                intent.setType("*/*");  
                intent.putExtra(Intent.EXTRA_TEXT, shareContent);
                context.startActivity(intent);
			}
		});
        //取消按钮
        mTextViewClose.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				dismiss();
			}
		});
        //设置SelectPicPopupWindow的View  
        this.setContentView(mMenuView);  
        //设置SelectPicPopupWindow弹出窗体的宽  
        this.setWidth(LayoutParams.FILL_PARENT);  
        //设置SelectPicPopupWindow弹出窗体的高  
        this.setHeight(LayoutParams.WRAP_CONTENT);  
        //设置SelectPicPopupWindow弹出窗体可点击  
        this.setFocusable(true); 
		//设置窗口外也能点击（点击外面时，窗口可以关闭）
        this.setOutsideTouchable(true);
        //设置SelectPicPopupWindow弹出窗体动画效果  
        this.setAnimationStyle(R.style.circleDialog);  
        //实例化一个ColorDrawable颜色为半透明  
        ColorDrawable dw = new ColorDrawable(0x00000000);  
        //设置SelectPicPopupWindow弹出窗体的背景  
        this.setBackgroundDrawable(dw); 
	}
    
    /**
     * 将GridView改成单行横向布局
     */
    private void changeGridView(Context context) {
        // item宽度
        int itemWidth = dip2px(context, 100);
        // item之间的间隔
        int itemPaddingH = dip2px(context, 1);
        int size = mAppinfoList.size();
        // 计算GridView宽度
        int gridviewWidth = size/2 * (itemWidth + itemPaddingH);

        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                gridviewWidth, LinearLayout.LayoutParams.MATCH_PARENT);
        mGridView.setLayoutParams(params);
        mGridView.setColumnWidth(itemWidth);
        mGridView.setHorizontalSpacing(itemPaddingH);
        mGridView.setStretchMode(GridView.NO_STRETCH);
        mGridView.setNumColumns(size/2);
    }
    
    /**
     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
     * @param context   上下文
     * @param dpValue   dp值
     * @return  px值
     */
    public static int dip2px(Context context, float dpValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }
    
}

四、再写一个工具类，用于获取手机中所有带分享功能的应用

ShareUtil.java

package com.t20.sharedemo.util;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;

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

import com.t20.sharedemo.entity.AppInfo;

public class ShareUtil {
	/**
     * 获取手机内所有支持分享的应用列表
     */
    public static ArrayList<AppInfo> getShareAppList(Context context, Intent intent) {
        ArrayList<AppInfo> shareAppInfos = new ArrayList<AppInfo>();
        PackageManager packageManager = context.getPackageManager();
        List<ResolveInfo> resolveInfos = getShareApps(context);
        if (null == resolveInfos) {
            return null;
        } else {
            for (ResolveInfo resolveInfo : resolveInfos) {
                AppInfo appInfo = new AppInfo();
                appInfo.setPkgName(resolveInfo.activityInfo.packageName);
                appInfo.setLaunchClassName(resolveInfo.activityInfo.name);
                appInfo.setAppName(resolveInfo.loadLabel(packageManager).toString());
                appInfo.setAppIcon(resolveInfo.loadIcon(packageManager));
                shareAppInfos.add(appInfo);
            }
        }
        return shareAppInfos;
    }

    /**
     * 查询手机内所有支持分享的应用列表
     */
    public static List<ResolveInfo> getShareApps(Context context) {    
        List<ResolveInfo> mApps = new ArrayList<ResolveInfo>();  
        Intent intent = new Intent(Intent.ACTION_SEND, null);  
        intent.addCategory(Intent.CATEGORY_DEFAULT);  
        //intent.setType("text/plain"); //纯文本 
        intent.setType("*/*");  
        PackageManager pManager = context.getPackageManager();  
        mApps = pManager.queryIntentActivities(intent,PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);  
        return mApps;  
    }  
}

六、我是使用GridView来显示应用分享图标的，因此需要写个GridView的适配器

AppInfoAdapter.java

package com.t20.sharedemo.adapter;

import java.util.List;

import com.t20.sharedemo.R;
import com.t20.sharedemo.entity.AppInfo;

import android.annotation.SuppressLint;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class AppInfoAdapter extends BaseAdapter {

	private Context context;
	private List<AppInfo> mAppinfoList;
	private OnItemClickListener mOnItemClickLitener;

	public AppInfoAdapter(Context context, List<AppInfo> mAppinfoList) {
		super();
		this.context = context;
		this.mAppinfoList = mAppinfoList;
	}

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

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

	@Override
	public long getItemId(int arg0) {
		// TODO Auto-generated method stub
		return 0;
	}

	@SuppressLint("NewApi")
	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		AppInfo appInfo = mAppinfoList.get(position);
		// 加载布局
		View view;
		ViewHolder viewHolder;
		if (convertView == null) {
			view = LayoutInflater.from(context).inflate(R.layout.appinfo_item, null);
			viewHolder = new ViewHolder(view);
			// 将ViewHolder存储在View中
			view.setTag(viewHolder);
		} else {
			view = convertView;
			// 重新获取ViewHolder
			viewHolder = (ViewHolder) view.getTag();

		}
		//设置控件的值
		viewHolder.imageViewIcon.setImageDrawable(appInfo.getAppIcon());
		String name=appInfo.getAppName();
		viewHolder.textViewName.setText(name);
		return view;
	}

	class ViewHolder {
		ImageView imageViewIcon;
		TextView textViewName;
		
		public ViewHolder(View view) {
			this.imageViewIcon = (ImageView) view.findViewById(R.id.appinfo_item_icon);
			this.textViewName = (TextView) view.findViewById(R.id.appinfo_item_name);
		}
	}

}

七、MainActivity.java活动的代码比较简单，直接定义SharePopupWindow窗口即可

package com.t20.sharedemo;

import com.t20.sharedemo.view.SharePopupWindow;

import android.os.Bundle;
import android.app.Activity;
import android.view.Gravity;
import android.view.View;
import android.view.Window;
import android.widget.RelativeLayout;

public class MainActivity extends Activity {

	private RelativeLayout mLayoutRoot;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		// 1、隐藏标题栏，在加载布局之前设置(兼容Android2.3.3版本)
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		// 2、隐藏状态栏
		// getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
		setContentView(R.layout.activity_main);
		//获取根布局
		mLayoutRoot=(RelativeLayout) findViewById(R.id.mainActivity_root);
	}
	/**
	 * 点击进行分享
	 */
	public void share(View view){
		// 设置要分享的内容
		String shareContent="#神码工作室#博客地址：https://blog.csdn.net/qq15577969";
		SharePopupWindow spw = new SharePopupWindow(this, shareContent);
		// 显示窗口
		spw.showAtLocation(mLayoutRoot, Gravity.BOTTOM, 0, 0);
	}
}