android7.0 通过代码 分享图片到朋友圈

转载注明出处：简书-十个雨点

在Android7.0中，系统对scheme为file://的uri进行了限制，所以通过这种uri来进行分享的一些接口就不能用了，比如使用代码来调用分享朋友圈的接口。
此时就得使用其他的URI scheme来代替 file://，比如MediaStore的 content://。直接上代码：

    private static boolean checkInstallation(Context context, String packageName) {
        try {
            context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_ACTIVITIES);
            return true;
        } catch (PackageManager.NameNotFoundException e) {
            return false;
        }
    }

    public static void shareToWeChat(View view, Context context) {
        // TODO: 2015/12/13 将需要分享到微信的图片准备好
        try {
            if (!checkInstallation(context, "com.tencent.mm")) {
                SnackBarUtil.show(view, R.string.share_no_wechat);
                return;
            }
            Intent intent = new Intent();
            //分享精确到微信的页面，朋友圈页面，或者选择好友分享页面
            ComponentName comp = new ComponentName("com.tencent.mm", "com.tencent.mm.ui.tools.ShareToTimeLineUI");
            intent.setComponent(comp);
            intent.setAction(Intent.ACTION_SEND_MULTIPLE);
            intent.setType("image/*");
//        intent.setType("text/plain");
            //添加Uri图片地址
//        String msg=String.format(getString(R.string.share_content), getString(R.string.app_name), getLatestWeekStatistics() + "");
            String msg = context.getString(R.string.share_content);
            intent.putExtra("Kdescription", msg);
            ArrayList<Uri> imageUris = new ArrayList<Uri>();
            // TODO: 2016/3/8 根据不同图片来设置分享
            File dir = context.getExternalFilesDir(null);
            if (dir == null || dir.getAbsolutePath().equals("")) {
                dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath());
            }
            File pic = new File(dir, "bigbang.jpg");
            pic.deleteOnExit();
            BitmapDrawable bitmapDrawable;
            if (Build.VERSION.SDK_INT < 22) {
                bitmapDrawable = (BitmapDrawable) context.getResources().getDrawable(R.mipmap.bannar);
            } else {
                bitmapDrawable = (BitmapDrawable) context.getDrawable(R.mipmap.bannar);
            }
            try {
                bitmapDrawable.getBitmap().compress(Bitmap.CompressFormat.JPEG, 75, new FileOutputStream(pic));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
                imageUris.add(Uri.fromFile(pic));
            }else {
                //修复微信在7.0崩溃的问题
                Uri uri =Uri.parse(android.provider.MediaStore.Images.Media.insertImage(context.getContentResolver(), pic.getAbsolutePath(), "bigbang.jpg", null));
                imageUris.add(uri);
            }

            intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, imageUris);
            ((Activity) context).startActivityForResult(intent, 1000);
        }catch (Throwable e){
            SnackBarUtil.show(view,R.string.share_error);
        }

还有一种方式，就是FileProvider来分享文件，操作起来稍微复杂一点，大概代码如下（代码功能是拍照的）：

String mCurrentPhotoPath;

private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
        imageFileName,  /* prefix */
        ".jpg",         /* suffix */
        storageDir      /* directory */
    );

    // Save a file: path for use with ACTION_VIEW intents
    mCurrentPhotoPath = "file:" + image.getAbsolutePath();
    return image;
}

static final int REQUEST_TAKE_PHOTO = 1;

private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    // Ensure that there's a camera activity to handle the intent
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        // Create the File where the photo should go
        File photoFile = null;
        try {
            photoFile = createImageFile();
        } catch (IOException ex) {
            // Error occurred while creating the File
            ...
        }
        // Continue only if the File was successfully created
        if (photoFile != null) {
            Uri photoURI = FileProvider.getUriForFile(this,
                                                  "com.example.android.fileprovider",
                                                  photoFile);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
            startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
        }
    }
}

还要在manifest中声明这个FileProvider

<application>
   ...
   <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="com.example.android.fileprovider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths"></meta-data>
    </provider>
    ...
</application>

在res/xml/文件夹下新建文件file_paths.xml：

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="my_images" path="Android/data/com.example.package.name/files/Pictures" />
</paths>

具体代码可以参考Bigbang项目的ShareCard的处理。

参考：
stackoverflow