facebook和twitter的截图分享

记录一下代码，以后自己可以抄。。我抄我自己=。=

SDK的接入看之前的博客。所以话不多少，直接上代码（记得分享一定要安装原生app（FB和twitter），不然只通过网页分享无法发图片。），初始化都在onCreate（）中

一、截屏（android 5.0以上）

定义：

CallbackManager callbackManager;
ShareDialog shareDialog;
GameRequestDialog  requestDialog;

ImageReader mImageReader;

（1）获取截屏权限

startActivityForResult(((MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE)).createScreenCaptureIntent(),1);

（2）截屏回调

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Log.e("Facebook1", "onActivityResult");
    AndroidLog("requestCode:"+String.valueOf(requestCode)+"resultCode"+String.valueOf(resultCode));
    super.onActivityResult(requestCode, resultCode, data);

    parseData(data);

}

    private void parseData(Intent data){

        MediaProjection mMediaProjection = ((MediaProjectionManager)getSystemService(Context.MEDIA_PROJECTION_SERVICE)).getMediaProjection(Activity.RESULT_OK,data);
        if (mMediaProjection == null)
            return;
        AndroidLog("截屏初始化");

        mImageReader = ImageReader.newInstance(
                getScreenWidth(this),
                getScreenHeight(this),
                PixelFormat.RGBA_8888,1);
       // AndroidLog(mImageReader.toString());
        VirtualDisplay mVirtualDisplay = mMediaProjection.createVirtualDisplay("screen-mirror",
                getScreenWidth(this),
                getScreenHeight(this),
                Resources.getSystem().getDisplayMetrics().densityDpi,
                DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
                mImageReader.getSurface(), null, null);
    }

public static int getScreenWidth(Context context)
{
    WindowManager wm = (WindowManager) context
            .getSystemService(Context.WINDOW_SERVICE);
    DisplayMetrics outMetrics = new DisplayMetrics();
    wm.getDefaultDisplay().getMetrics(outMetrics);
    return outMetrics.widthPixels;
}
public static int getScreenHeight(Context context)
{
    WindowManager wm = (WindowManager) context
            .getSystemService(Context.WINDOW_SERVICE);
    DisplayMetrics outMetrics = new DisplayMetrics();
    wm.getDefaultDisplay().getMetrics(outMetrics);
    return outMetrics.heightPixels;
}

二、facebook分享和邀请

（1）初始化facebook

/**
 * facebook配置, 在oncreate()方法中调用
 */
private void initFacebook() {
    //抽取成员变量
    callbackManager = CallbackManager.Factory.create();
    shareDialog = new ShareDialog(this);//分享
    requestDialog = new GameRequestDialog(this);//邀请好友

    // this part is optional
    shareDialog.registerCallback(callbackManager, new FacebookCallback<Sharer.Result>() {

        @Override
        public void onSuccess(Sharer.Result result) {
            //分享成功的回调，在这里做一些自己的逻辑处理
        }

        @Override
        public void onCancel() {

        }

        @Override
        public void onError(FacebookException error) {
              AndroidLog(error.toString());
        }
    });

    requestDialog.registerCallback(callbackManager,
            new FacebookCallback<GameRequestDialog.Result>() {
                public void onSuccess(GameRequestDialog.Result result) {
                    String id = result.getRequestId();
                }
                public void onCancel() {}
                public void onError(FacebookException error) {}
            }
    );

}

（2）分享

/**
 * 这是一个按钮的点击事件，分享到facebook
 * 若未安装facebook客户端，则会跳转到浏览器
 *
 * @param
 */
public void shareToFacebook() {
    //这里分享一个链接，更多分享配置参考官方介绍：https://developers.facebook.com/docs/sharing/android
    AndroidLog("点击分享按钮");
    Image image = mImageReader.acquireLatestImage();
    int width = image.getWidth();
    int height = image.getHeight();
    final Image.Plane[] planes = image.getPlanes();
    final ByteBuffer buffer = planes[0].getBuffer();
    int pixelStride = planes[0].getPixelStride();
    int rowStride = planes[0].getRowStride();
    int rowPadding = rowStride - pixelStride * width;
    Bitmap mBitmap = Bitmap.createBitmap(width + rowPadding / pixelStride, height, Bitmap.Config.ARGB_8888);
    mBitmap.copyPixelsFromBuffer(buffer);
    mBitmap = Bitmap.createBitmap(mBitmap, 0, 0, width, height);
    image.close();
    //AndroidLog(mBitmap.toString());
//上一步获得位图后直接分享，不保存在本地。

SharePhoto photo = new SharePhoto.Builder()
        .setBitmap(mBitmap)
        .build();
SharePhotoContent content = new SharePhotoContent.Builder()
        .addPhoto(photo)
        .build();
）

（3）邀请

private void onClickRequestButton() {

GameRequestContent content = new GameRequestContent.Builder()
        .setMessage("Come play this Game ！！ This test facebook sdk")
        .build();
requestDialog.show(content);
}

三、Twitter分享

（1）初始化

Twitter.initialize(this);

（2）分享

public void shareToTwitter() {
    Image image = mImageReader.acquireLatestImage();

    int width = image.getWidth();
    int height = image.getHeight();
    final Image.Plane[] planes = image.getPlanes();
    final ByteBuffer buffer = planes[0].getBuffer();
    int pixelStride = planes[0].getPixelStride();
    int rowStride = planes[0].getRowStride();
    int rowPadding = rowStride - pixelStride * width;
    Bitmap mBitmap = Bitmap.createBitmap(width + rowPadding / pixelStride, height, Bitmap.Config.ARGB_8888);
    mBitmap.copyPixelsFromBuffer(buffer);
    mBitmap = Bitmap.createBitmap(mBitmap, 0, 0, width, height);
    image.close();

//套路还是一样的，只是twitter分享图片需要填uri

ContentValues values = new ContentValues();

//values.put(MediaStore.Images.Media.insertImage() , "jinta");
Uri uri = getContentResolver().insert(Media.EXTERNAL_CONTENT_URI ,values);
AndroidLog("URI路径 ："+uri.toString());
OutputStream os = null;
try
{
    // 获取刚插入的数据的Uri对应的输出流
    os = getContentResolver().openOutputStream(uri);
    // 将bitmap图片保存到Uri对应的数据节点中
    mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, os);
    os.close();
}
catch (IOException e) {
    e.printStackTrace();
}

    TweetComposer.Builder builder = new TweetComposer.Builder(this)
        .text("Can you help complete all the orders and save the factory?")
.image(uri);//using content://.... FileProvider.getUriForFile(this,APPID.file_provider,new File("/path/to/image"));
builder.show();
}