android中单图分享：微信好友、QQ好友、微博、本地

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qq 需要添加 lib 库：open_sdk_r6008_lite.jar

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// qq
implementation files('../libs/open_sdk_r6008_lite.jar')
// 微博
implementation "com.sina.weibo.sdk:core:$WEIBO_VERSION"
// wechat
implementation "com.tencent.mm.opensdk:wechat-sdk-android-without-mta:$WECHAT_VERSION"

方案 1

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public class Uposter {

    // [Android 分享功能之 微信 图片分享 - 陈三哥 - CSDN博客](https://blog.csdn.net/brokge/article/details/51851625)
    public static void shareWeChatFriend(Activity context, String path) {
        new Thread(() -> {
            // [java - exposed beyond app through ClipData.Item.getUri - Stack Overflow](https://stackoverflow.com/questions/48117511/exposed-beyond-app-through-clipdata-item-geturi)
            Uri uri = FileProvider.getUriForFile(context.getApplicationContext(), context.getPackageName() + ".provider", new File(path));

            Intent shareIntent = new Intent();
            //发送图片到朋友圈
            //ComponentName comp = new ComponentName("com.tencent.mm", "com.tencent.mm.ui.tools.ShareToTimeLineUI");
            //发送图片给好友。
            ComponentName comp = new ComponentName("com.tencent.mm", "com.tencent.mm.ui.tools.ShareImgUI");
            shareIntent.setComponent(comp);
            shareIntent.setAction(Intent.ACTION_SEND);
            shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
            shareIntent.setType("image/jpeg");
            context.startActivity(Intent.createChooser(shareIntent, "分享图片"));
        }).start();
    }

    // [QQ分享官方第三方接入（分享纯图片及截取view的bitmap图） - haibo_bear的博客 - CSDN博客](https://blog.csdn.net/haibo_bear/article/details/51321204)
    public static void shareToQQFriend(Activity context, String path) {
        new Thread(() -> {
            Tencent tencent = Tencent.createInstance(QQ_APP_ID, context);
            Bundle shareParams = new Bundle();
            shareParams.putInt(QQShare.SHARE_TO_QQ_KEY_TYPE, QQShare.SHARE_TO_QQ_TYPE_IMAGE);
            shareParams.putString(QQShare.SHARE_TO_QQ_IMAGE_LOCAL_URL, path);
            shareParams.putString(QQShare.SHARE_TO_QQ_APP_NAME, context.getResources().getString(R.string.app_name));
            shareParams.putInt(QQShare.SHARE_TO_QQ_EXT_INT, QQShare.SHARE_TO_QQ_FLAG_QZONE_ITEM_HIDE);
            tencent.shareToQQ(context, shareParams, null);
        }).start();
    }

    // [Android 调用系统分享文字、图片、文件，可直达微信、朋友圈、QQ、QQ空间、微博 - 她叫我小渝的个人空间 - OSCHINA](https://my.oschina.net/u/1462828/blog/2086000)
    public static void shareToWeiboFriend(Activity context, String path) {

        new Thread(() -> {
            Intent intent = new Intent();
            intent.setPackage("com.sina.weibo");
            intent.setAction(Intent.ACTION_SEND);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            Uri uri = FileProvider.getUriForFile(context.getApplicationContext(), context.getPackageName() + ".provider", new File(path));
            intent.putExtra(Intent.EXTRA_STREAM, uri);
            intent.setType("image/*");   //分享文件
            context.startActivity(Intent.createChooser(intent, "分享"));
        }).start();
    }

    public static void saveImage(Activity context, String path) {
        // [How can I display images from a specific folder on android gallery - Stack Overflow](https://stackoverflow.com/questions/13418807/how-can-i-display-images-from-a-specific-folder-on-android-gallery)
        class SingleMediaScanner implements MediaScannerConnection.MediaScannerConnectionClient {

            private MediaScannerConnection mMs;
            private File mFile;
            private Context mContext;

            private SingleMediaScanner(Context context, File f) {
                mFile = f;
                mContext = context;
                mMs = new MediaScannerConnection(context, this);
                mMs.connect();
            }

            public void onMediaScannerConnected() {
                mMs.scanFile(mFile.getAbsolutePath(), null);
            }

            public void onScanCompleted(String path, Uri uri) {
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setData(uri);
                mContext.startActivity(intent);
                mMs.disconnect();
            }

        }
        View v = context.findViewById(android.R.id.content);
        Snackbar snackbar = Snackbar.make(v, "保存成功", Snackbar.LENGTH_LONG);
        snackbar.setAction("点击查看", v1 -> {
            // showGallery(context);
            new SingleMediaScanner(context, new File(path));
        });
        snackbar.show();
    }

    private static void showGallery(Context context) {
        context.startActivity(new Intent(Intent.ACTION_VIEW,
            Uri.parse("content://media/internal/images/media")));
    }
}

调用方式

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Uposter.saveImage(mContext, "/sotrage/0/a.jpg")

方案 2

或者通过面向对象的方式来实现：

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public interface Share {
    void init(Activity context);

    boolean isInstall();

    void execute(String path);

    String getNotInstallTip();
}

其他类实现上面的接口，如：

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public class PosterShareWechat implements PosterShare {
    private Activity context;

    @Override
    public void init(Activity context) {
        this.context = context;
    }


    @Override
    public boolean isInstall() {
        return Uapp.isWechatAvilible(context);
    }

    @Override
    public void execute(String path) {
        // [Android 分享功能之 微信 图片分享 - 陈三哥 - CSDN博客](https://blog.csdn.net/brokge/article/details/51851625)
        // [java - exposed beyond app through ClipData.Item.getUri - Stack Overflow](https://stackoverflow.com/questions/48117511/exposed-beyond-app-through-clipdata-item-geturi)
        Uri uri = FileProvider.getUriForFile(context.getApplicationContext(), context.getPackageName() + ".provider", new File(path));

        Intent shareIntent = new Intent();
        //发送图片到朋友圈
        //ComponentName comp = new ComponentName("com.tencent.mm", "com.tencent.mm.ui.tools.ShareToTimeLineUI");
        //发送图片给好友。
        ComponentName comp = new ComponentName("com.tencent.mm", "com.tencent.mm.ui.tools.ShareImgUI");
        shareIntent.setComponent(comp);
        shareIntent.setAction(Intent.ACTION_SEND);
        shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
        shareIntent.setType("image/jpeg");
        context.startActivity(Intent.createChooser(shareIntent, "分享图片"));
    }

    @Override
    public String getNotInstallTip() {
        return "您没有安装微信";
    }
}

调用方式

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posterShare = new PosterShareWechat();
posterShare.init(context);
if (!posterShare.isInstall()) {
    Utoast.show(posterShare.getNotInstallTip());
    return;
}
posterShare.execute(path);