在试图GIF动画里面的TextView

Question

我希望能够GIF动画加载到文本之间的TextView的帮助，这是我想出来的：

我用Html.fromHtml

由于一个GIF可能会出现多次，因此我会加载所有不同的GIF数组，以便我可以通过参考回（尽管在此测试程序中未使用）

这就是我所得到的到目前为止：

public class MainActivity extends Activity implements ImageGetter { 
    private TextView mTv; 
    private Map<String, LevelListDrawable> gifs; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     gifs = new HashMap<>(); 
     String imgs="<p><img alt=\"\" src=\"http://lonelytraveller.comoj.com/qff/tjatja.gif\" style=\"height:50px; width:100px\" />Test Article, Test Article, Test Article, Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,Test Article,v</p>"; 
     Spanned spanned = Html.fromHtml(imgs, this, null); 
     mTv = (TextView) findViewById(R.id.tv); 
     mTv.setText(spanned); 

    } 

    @Override 
    public Drawable getDrawable(String source) { 
     if(gifs.get(source.split("\\Q/\\E")[source.split("\\Q/\\E").length-1]) != null){ 
      return gifs.get(source.split("\\Q/\\E")[source.split("\\Q/\\E").length-1]); 
     }else { 
      LevelListDrawable d = new LevelListDrawable(); 
      Drawable empty = ContextCompat.getDrawable(this, R.drawable.save); 
      d.addLevel(0, 0, empty); 
      d.setBounds(0, 0, empty.getIntrinsicWidth(), empty.getIntrinsicHeight()); 

      new LoadImage().execute(source, d); 

      return d; 
     } 
    } 

    class LoadImage extends AsyncTask<Object, Void, byte[]> { 

     private LevelListDrawable mDrawable; 
     private String key; 
     @Override 
     protected byte[] doInBackground(Object... params) { 
      String source = (String) params[0]; 
      key = source.split("\\Q/\\E")[source.split("\\Q/\\E").length-1]; 
      mDrawable = (LevelListDrawable) params[1]; 
      try { 
       InputStream is = new URL(source).openStream(); 
       return IOUtils.toByteArray(is); 
      } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
      } catch (MalformedURLException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
      return null; 
     } 

     @Override 
     protected void onPostExecute(byte[] bytes) { 
      if(bytes != null) { 
       GifDecoder decoder = new GifDecoder(); 
       decoder.read(bytes); 
       ArrayList<Long> alist = new ArrayList<>(); 
       for (int i = 0; i < decoder.getFrameCount(); i++) { 
        decoder.advance(); 
        Bitmap bitmap = decoder.getNextFrame(); 
        BitmapDrawable d = new BitmapDrawable(getResources(), bitmap); 
        int i2 = i+1; 
        mDrawable.addLevel(i2, i2, d); 
        mDrawable.setBounds(0, 0, bitmap.getWidth(), bitmap.getHeight()); 
        alist.add((long) decoder.getNextDelay()); 
       } 
       gifs.put(key, mDrawable); 
       animateGif(decoder.getFrameCount(), mDrawable, alist); 
      } 
     } 
    } 
    public void animateGif(int length, LevelListDrawable d, ArrayList<Long> delays){ 
     for(int i = 1; i<(length+1); i++){ 
      d.setLevel(i); 

      CharSequence t = mTv.getText(); 
      mTv.setText(t); 

      long sleep = delays.get(i-1); 
      try { 
       Thread.sleep(sleep); 
      } catch (InterruptedException e) { 
       e.printStackTrace(); 
      } 
      if(i == length) i=1; 
     } 
    } 
} 

我用这个GifDecoder：https://gist.github.com/devunwired/4479231

随着我上面贴的代码，我只得到空的绘制（0级），如果我在animateGif功能，我可以看到放一个记录，他确实做到了无限循环，但它只是不起作用，它停留在空的可绘制图像;

如果我改变onPostExecute功能的含量：

if(bytes != null) { 
     GifDecoder decoder = new GifDecoder(); 
     decoder.read(bytes); 
     decoder.advance(); 
     Bitmap bitmap = decoder.getNextFrame(); 
     BitmapDrawable d = new BitmapDrawable(getResources(), bitmap); 
     mDrawable.addLevel(1, 1, d); 
     mDrawable.setBounds(0, 0, bitmap.getWidth(), bitmap.getHeight()); 
     mDrawable.setLevel(1); 

     CharSequence t = mTv.getText(); 
     mTv.setText(t); 
    } 

它确实改变了空图像转换成GIF文件的第一帧。 我只是不明白为什么这不起作用，任何人都可以帮助我吗？

Answer 1

我解决这得益于一些帮助从jawatio在Android的开发IRC ..

通过添加该扶养到的build.gradle文件：

编译“pl.droidsonroids.gif：Android的GIF -drawable：1.2.6'

这是从：https://github.com/koral--/android-gif-drawable

，然后做这样的事情：

public class test extends Activity implements Drawable.Callback { 

public TextView tv; 

    @Override 
    protected void onCreate(@Nullable Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.test); 
     tv = (TextView) findViewById(R.id.testtext); 
     new LoadImage().execute("http://lonelytraveller.comoj.com/qff/tjatja.gif"); 

    } 

    @Override 
    public void invalidateDrawable(Drawable who) { 
     tv.invalidate(); 
    } 

    @Override 
    public void scheduleDrawable(Drawable who, Runnable what, long when) { 
     tv.postDelayed(what, when); 
    } 

    @Override 
    public void unscheduleDrawable(Drawable who, Runnable what) { 
     tv.removeCallbacks(what); 
    } 


    class LoadImage extends AsyncTask<Object, Void, byte[]> { 

     private String key; 
     @Override 
     protected byte[] doInBackground(Object... params) { 
      String source = (String) params[0]; 
      //key = source.split("\\Q/\\E")[source.split("\\Q/\\E").length-1]; 
      try { 
       InputStream is = new URL(source).openStream(); 
       return IOUtils.toByteArray(is); 
      } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
      } catch (MalformedURLException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
      return null; 
     } 

     @Override 
     protected void onPostExecute(byte[] b) { 
      SpannableStringBuilder ssb = new SpannableStringBuilder("test"); 
      GifDrawable gd = null; 
      try { 
       gd = new GifDrawable(b); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
      if (gd != null) { 
       gd.setBounds(0, 0, gd.getIntrinsicWidth(), gd.getIntrinsicHeight()); 

       gd.setCallback(test.this); 

       ssb.setSpan(new ImageSpan(gd), 1, 2, 0); 
       tv.setText(ssb); 
      } 
     } 
    } 
}