将视频转换为 GIF

Posted 2023-03-25

【中文标题】将视频转换为 GIF

【英文标题】：Converting a video to a GIF

【发布时间】：2020-03-17 13:00:15

【问题描述】：

我正在尝试让我的应用程序接受来自手机库的视频以上传并转换为 GIF 格式。我的代码虽然给出了这个构建错误：-

error: <anonymous com.example.bim.Video2gif$2> is not abstract and does not override abstract method onReschedule(String,ErrorInfo) in UploadCallback

还有关于我的 onActivityResult 方法的警告：-

Overriding method should call super.onActivityResult

代码如下：-

public class Video2gif extends AppCompatActivity 

    private Button uploadBtn;
    private ProgressBar progressBar;
    private int SELECT_VIDEO = 2;
    private ImageView img1;
    private DownloadManager downloadManager;
    private Button download_btn;
    private String gifUrl;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video2gif);
        MediaManager.init(this);

        progressBar = findViewById(R.id.progress_bar);
        MediaManager.init(this);
        img1 = findViewById(R.id.img1);
        uploadBtn = findViewById(R.id.uploadBtn);

        uploadBtn.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View view) 
                pickVideoFromGallery();

            
            private void pickVideoFromGallery() 
                Intent GalleryIntent = new Intent();
                GalleryIntent.setType("video/*");
                GalleryIntent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(Intent.createChooser(GalleryIntent,
                        "select video"), SELECT_VIDEO);
            
        );
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, final Intent data) 

        if (requestCode == SELECT_VIDEO && resultCode == RESULT_OK) 
            Uri selectedVideo = data.getData();
            MediaManager.get()
                    .upload(selectedVideo)
                    .unsigned("myid")
                    .option("resource_type", "video")
                    .callback(new UploadCallback()
                        @Override
                        public void onStart(String requestId) 
                            progressBar.setVisibility(View.VISIBLE);
                            Toast.makeText(Video2gif.this,
                                    "Upload Started...", Toast.LENGTH_SHORT).show();
                        

                        public void onProgress() 
                        

                        public void onSuccess(String requestId, Map resultData) 

                            Toast.makeText(Video2gif.this, "Uploaded Succesfully",
                                    Toast.LENGTH_SHORT).show();
                            progressBar.setVisibility(View.GONE);
                            uploadBtn.setVisibility(View.INVISIBLE);

                            String publicId = resultData.get("public_id").toString();

                            gifUrl = MediaManager.get().url().resourceType("video")
                                    .transformation(new Transformation().videoSampling("25")
                                            .delay("200").height(200).effect("loop:10").crop("scale"))
                                    .resourceType("video").generate(publicId+".gif");

                            Glide.with(getApplicationContext()).asGif().load(gifUrl).into(img1);
                            download_btn.setVisibility(View.VISIBLE);

                        
                        public void onError(String requestId, ErrorInfo error) 
                            Toast.makeText(Video2gif.this,
                                    "Upload Error", Toast.LENGTH_SHORT).show();
                            Log.v("ERROR!!", error.getDescription());
                        


        );
    

我还使用 Cloudinary 来帮助将视频处理为 GIF。任何帮助将不胜感激，非常感谢！

【参考方案1】：

当您在 android 中使用接口时，您需要在您的活动/片段中包含（覆盖）它们包含的回调方法。此外，覆盖某些系统方法需要调用它们的 super，这意味着许多活动在相互继承时可能正在侦听相同的回调。通过在这些回调中添加 super ，您可以让结果通过所有回调。因此，对于OnActivityResult，只需在您的方法中添加以下行：

super.onActivityResult(requestCode, resultCode, data);

对于onReschedule，您可以让 Android Studio 为您生成它。只需转到 Code->Generate-Override Methods 并选择 onReschedule

【讨论】：

您的答案很准确，解决了我的两个问题，我也使用这种方式为 onProgress 生成了覆盖方法，谢谢！！！