.gifファイルをimageviewで表示する方法は？
私のレイアウトにはたくさんの画像ビューがあります。 .gifアニメーションファイルを1つのイメージビューで表示したい。 Yashメソッド（ AndroidのImageViewにgif画像を追加 ）を試しましたが、.gifファイルにはすべてのレイアウトが表示されました。他の見方は消えた。
全部見せたい。
何か案が？
.gifファイルをres/rawフォルダーに入れて、フラグメントまたはアクティビティに入れます。次に、gifをimageviewに設定できます。
GifAnimationDrawable gif;
try {
gif = new
GifAnimationDrawable(getResources().openRawResource(R.raw.download));
gif.setOneShot(false);
} catch (NotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
ivGif.setImageDrawable(gif);
gif.setVisible(true, true);
}
1）GifAnimationDrawable .Java
public class GifAnimationDrawable extends AnimationDrawable
{
private boolean decoded;
private GifDecoder mGifDecoder;
private Bitmap mTmpBitmap;
private int height, width;
public GifAnimationDrawable(File f) throws IOException
{
this(f, false);
}
public GifAnimationDrawable(InputStream is) throws IOException
{
this(is, false);
}
public GifAnimationDrawable(File f, boolean inline) throws IOException
{
this(new BufferedInputStream(new FileInputStream(f), 32768), inline);
}
public GifAnimationDrawable(InputStream is, boolean inline) throws IOException
{
super();
InputStream bis = is;
if(!BufferedInputStream.class.isInstance(bis)) bis = new BufferedInputStream(is, 32768);
decoded = false;
mGifDecoder = new GifDecoder();
mGifDecoder.read(bis);
mTmpBitmap = mGifDecoder.getFrame(0);
Android.util.Log.v("GifAnimationDrawable", "===>Lead frame: ["+width+"x"+height+"; "+mGifDecoder.getDelay(0)+";"+mGifDecoder.getLoopCount()+"]");
height = mTmpBitmap.getHeight();
width = mTmpBitmap.getWidth();
addFrame(new BitmapDrawable(mTmpBitmap), mGifDecoder.getDelay(0));
setOneShot(mGifDecoder.getLoopCount() != 0);
setVisible(true, true);
if(inline){
loader.run();
}else{
new Thread(loader).start();
}
}
public boolean isDecoded(){ return decoded; }
private Runnable loader = new Runnable(){
public void run()
{
mGifDecoder.complete();
int i, n = mGifDecoder.getFrameCount(), t;
for(i=1;i<n;i++){
mTmpBitmap = mGifDecoder.getFrame(i);
t = mGifDecoder.getDelay(i);
Android.util.Log.v("GifAnimationDrawable", "===>Frame "+i+": "+t+"]");
addFrame(new BitmapDrawable(mTmpBitmap), t);
}
decoded = true;
mGifDecoder = null;
}
};
public int getMinimumHeight(){ return height; }
public int getMinimumWidth(){ return width; }
public int getIntrinsicHeight(){ return height; }
public int getIntrinsicWidth(){ return width; }
}
2）GifDecoder.Java
public class GifDecoder
{
public static final int STATUS_OK = 0;
public static final int STATUS_FORMAT_ERROR = 1;
public static final int STATUS_OPEN_ERROR = 2;
protected static final int MAX_STACK_SIZE = 4096;
public static final int MIN_DELAY = 100;
public static final int MIN_DELAY_ENFORCE_THRESHOLD = 20;
protected InputStream in;
protected int status;
protected int width; // full image width
protected int height; // full image height
protected boolean gctFlag; // global color table used
protected int gctSize; // size of global color table
protected int loopCount = 1; // iterations; 0 = repeat forever
protected int[] gct; // global color table
protected int[] lct; // local color table
protected int[] act; // active color table
protected int bgIndex; // background color index
protected int bgColor; // background color
protected int lastBgColor; // previous bg color
protected int pixelAspect; // pixel aspect ratio
protected boolean lctFlag; // local color table flag
protected boolean interlace; // interlace flag
protected int lctSize; // local color table size
protected int ix, iy, iw, ih; // current image rectangle
protected int lrx, lry, lrw, lrh;
protected Bitmap image; // current frame
protected Bitmap lastBitmap; // previous frame
protected byte[] block = new byte[256]; // current data block
protected int blockSize = 0; // block size last graphic control extension info
protected int dispose = 0; // 0=no action; 1=leave in place; 2=restore to bg; 3=restore to prev
protected int lastDispose = 0;
protected boolean transparency = false; // use transparent color
protected int delay = 0; // delay in milliseconds
protected int transIndex; // transparent color index
// LZW decoder working arrays
protected short[] prefix;
protected byte[] suffix;
protected byte[] pixelStack;
protected byte[] pixels;
protected Vector<GifFrame> frames; // frames read from current file
protected int frameCount;
private boolean readComplete;
public GifDecoder()
{
readComplete = false;
}
private static class GifFrame {
public GifFrame(Bitmap im, int del) {
image = im;
delay = del;
}
public Bitmap image;
public int delay;
}
/**
* Gets display duration for specified frame.
*
* @param n
* int index of frame
* @return delay in milliseconds
*/
public int getDelay(int n) {
delay = -1;
if ((n >= 0) && (n < frameCount)) {
delay = frames.elementAt(n).delay;
//meets browser compatibility standards
if (delay < MIN_DELAY_ENFORCE_THRESHOLD) delay = MIN_DELAY;
}
return delay;
}
/**
* Gets the number of frames read from file.
*
* @return frame count
*/
public int getFrameCount() {
return frameCount;
}
/**
* Gets the first (or only) image read.
*
* @return BufferedBitmap containing first frame, or null if none.
*/
public Bitmap getBitmap() {
return getFrame(0);
}
/**
* Gets the "Netscape" iteration count, if any. A count of 0 means repeat indefinitiely.
*
* @return iteration count if one was specified, else 1.
*/
public int getLoopCount() {
return loopCount;
}
/**
* Creates new frame image from current data (and previous frames as specified by their disposition codes).
*/
protected void setPixels() {
// expose destination image's pixels as int array
int[] dest = new int[width * height];
// fill in starting image contents based on last image's dispose code
if (lastDispose > 0) {
if (lastDispose == 3) {
// use image before last
int n = frameCount - 2;
if (n > 0) {
lastBitmap = getFrame(n - 1);
} else {
lastBitmap = null;
}
}
if (lastBitmap != null) {
lastBitmap.getPixels(dest, 0, width, 0, 0, width, height);
// copy pixels
if (lastDispose == 2) {
// fill last image rect area with background color
int c = 0;
if (!transparency) {
c = lastBgColor;
}
for (int i = 0; i < lrh; i++) {
int n1 = (lry + i) * width + lrx;
int n2 = n1 + lrw;
for (int k = n1; k < n2; k++) {
dest[k] = c;
}
}
}
}
}
// copy each source line to the appropriate place in the destination
int pass = 1;
int inc = 8;
int iline = 0;
for (int i = 0; i < ih; i++) {
int line = i;
if (interlace) {
if (iline >= ih) {
pass++;
switch (pass) {
case 2:
iline = 4;
break;
case 3:
iline = 2;
inc = 4;
break;
case 4:
iline = 1;
inc = 2;
break;
default:
break;
}
}
line = iline;
iline += inc;
}
line += iy;
if (line < height) {
int k = line * width;
int dx = k + ix; // start of line in dest
int dlim = dx + iw; // end of dest line
if ((k + width) < dlim) {
dlim = k + width; // past dest Edge
}
int sx = i * iw; // start of line in source
while (dx < dlim) {
// map color and insert in destination
int index = ((int) pixels[sx++]) & 0xff;
int c = act[index];
if (c != 0) {
dest[dx] = c;
}
dx++;
}
}
}
image = Bitmap.createBitmap(dest, width, height, Config.ARGB_4444);
}
/**
* Gets the image contents of frame n.
*
* @return BufferedBitmap representation of frame, or null if n is invalid.
*/
public Bitmap getFrame(int n) {
if (frameCount <= 0)
return null;
n = n % frameCount;
return ((GifFrame) frames.elementAt(n)).image;
}
/**
* Reads GIF image from stream
*
* @param is
* containing GIF file.
* @return read status code (0 = no errors)
*/
public int read(InputStream is)
{
init();
if (is != null) {
in = is;
readHeader();
if (!err()) {
readContents();
if (frameCount < 0) {
status = STATUS_FORMAT_ERROR;
}
}
} else {
status = STATUS_OPEN_ERROR;
}
readComplete = true;
return status;
}
public void complete()
{
readContents();
try {
in.close();
} catch (Exception e) {
}
}
/**
* Decodes LZW image data into pixel array. Adapted from John Cristy's BitmapMagick.
*/
protected void decodeBitmapData() {
int nullCode = -1;
int npix = iw * ih;
int available, clear, code_mask, code_size, end_of_information, in_code, old_code, bits, code, count, i, datum, data_size, first, top, bi, pi;
if ((pixels == null) || (pixels.length < npix)) {
pixels = new byte[npix]; // allocate new pixel array
}
if (prefix == null) {
prefix = new short[MAX_STACK_SIZE];
}
if (suffix == null) {
suffix = new byte[MAX_STACK_SIZE];
}
if (pixelStack == null) {
pixelStack = new byte[MAX_STACK_SIZE + 1];
}
// Initialize GIF data stream decoder.
data_size = read();
clear = 1 << data_size;
end_of_information = clear + 1;
available = clear + 2;
old_code = nullCode;
code_size = data_size + 1;
code_mask = (1 << code_size) - 1;
for (code = 0; code < clear; code++) {
prefix[code] = 0; // XXX ArrayIndexOutOfBoundsException
suffix[code] = (byte) code;
}
// Decode GIF pixel stream.
datum = bits = count = first = top = pi = bi = 0;
for (i = 0; i < npix;) {
if (top == 0) {
if (bits < code_size) {
// Load bytes until there are enough bits for a code.
if (count == 0) {
// Read a new data block.
count = readBlock();
if (count <= 0) {
break;
}
bi = 0;
}
datum += (((int) block[bi]) & 0xff) << bits;
bits += 8;
bi++;
count--;
continue;
}
// Get the next code.
code = datum & code_mask;
datum >>= code_size;
bits -= code_size;
// Interpret the code
if ((code > available) || (code == end_of_information)) {
break;
}
if (code == clear) {
// Reset decoder.
code_size = data_size + 1;
code_mask = (1 << code_size) - 1;
available = clear + 2;
old_code = nullCode;
continue;
}
if (old_code == nullCode) {
pixelStack[top++] = suffix[code];
old_code = code;
first = code;
continue;
}
in_code = code;
if (code == available) {
pixelStack[top++] = (byte) first;
code = old_code;
}
while (code > clear) {
pixelStack[top++] = suffix[code];
code = prefix[code];
}
first = ((int) suffix[code]) & 0xff;
// Add a new string to the string table,
if (available >= MAX_STACK_SIZE) {
break;
}
pixelStack[top++] = (byte) first;
prefix[available] = (short) old_code;
suffix[available] = (byte) first;
available++;
if (((available & code_mask) == 0) && (available < MAX_STACK_SIZE)) {
code_size++;
code_mask += available;
}
old_code = in_code;
}
// Pop a pixel off the pixel stack.
top--;
pixels[pi++] = pixelStack[top];
i++;
}
for (i = pi; i < npix; i++) {
pixels[i] = 0; // clear missing pixels
}
}
/**
* Returns true if an error was encountered during reading/decoding
*/
protected boolean err() {
return status != STATUS_OK;
}
/**
* Initializes or re-initializes reader
*/
protected void init() {
status = STATUS_OK;
frameCount = 0;
frames = new Vector<GifFrame>();
gct = null;
lct = null;
}
/**
* Reads a single byte from the input stream.
*/
protected int read() {
int curByte = 0;
try {
curByte = in.read();
} catch (Exception e) {
status = STATUS_FORMAT_ERROR;
}
return curByte;
}
/**
* Reads next variable length block from input.
*
* @return number of bytes stored in "buffer"
*/
protected int readBlock() {
blockSize = read();
int n = 0;
if (blockSize > 0) {
try {
int count = 0;
while (n < blockSize) {
count = in.read(block, n, blockSize - n);
if (count == -1) {
break;
}
n += count;
}
} catch (Exception e) {
e.printStackTrace();
}
if (n < blockSize) {
status = STATUS_FORMAT_ERROR;
}
}
return n;
}
/**
* Reads color table as 256 RGB integer values
*
* @param ncolors
* int number of colors to read
* @return int array containing 256 colors (packed ARGB with full alpha)
*/
protected int[] readColorTable(int ncolors) {
int nbytes = 3 * ncolors;
int[] tab = null;
byte[] c = new byte[nbytes];
int n = 0;
try {
n = in.read(c);
} catch (Exception e) {
e.printStackTrace();
}
if (n < nbytes) {
status = STATUS_FORMAT_ERROR;
} else {
tab = new int[256]; // max size to avoid bounds checks
int i = 0;
int j = 0;
while (i < ncolors) {
int r = ((int) c[j++]) & 0xff;
int g = ((int) c[j++]) & 0xff;
int b = ((int) c[j++]) & 0xff;
tab[i++] = 0xff000000 | (r << 16) | (g << 8) | b;
}
}
return tab;
}
/**
* Main file parser. Reads GIF content blocks.
*/
protected void readContents() {
// read GIF file content blocks
boolean done = false;
while (!(done || err())) {
int code = read();
switch (code) {
case 0x2C: // image separator
readBitmap();
if(!readComplete) return;
break;
case 0x21: // extension
code = read();
switch (code) {
case 0xf9: // graphics control extension
readGraphicControlExt();
break;
case 0xff: // application extension
readBlock();
String app = "";
for (int i = 0; i < 11; i++) {
app += (char) block[i];
}
if (app.equals("NETSCAPE2.0")) {
readNetscapeExt();
} else {
skip(); // don't care
}
break;
case 0xfe:// comment extension
skip();
break;
case 0x01:// plain text extension
skip();
break;
default: // uninteresting extension
skip();
}
break;
case 0x3b: // terminator
done = true;
break;
case 0x00: // bad byte, but keep going and see what happens break;
default:
status = STATUS_FORMAT_ERROR;
}
}
}
/**
* Reads Graphics Control Extension values
*/
protected void readGraphicControlExt() {
read(); // block size
int packed = read(); // packed fields
dispose = (packed & 0x1c) >> 2; // disposal method
if (dispose == 0) {
dispose = 1; // elect to keep old image if discretionary
}
transparency = (packed & 1) != 0;
delay = readShort() * 10; // delay in milliseconds
transIndex = read(); // transparent color index
read(); // block terminator
}
/**
* Reads GIF file header information.
*/
protected void readHeader() {
String id = "";
for (int i = 0; i < 6; i++) {
id += (char) read();
}
if (!id.startsWith("GIF")) {
status = STATUS_FORMAT_ERROR;
return;
}
readLSD();
if (gctFlag && !err()) {
gct = readColorTable(gctSize);
bgColor = gct[bgIndex];
}
}
/**
* Reads next frame image
*/
protected void readBitmap() {
ix = readShort(); // (sub)image position & size
iy = readShort();
iw = readShort();
ih = readShort();
int packed = read();
lctFlag = (packed & 0x80) != 0; // 1 - local color table flag interlace
lctSize = (int) Math.pow(2, (packed & 0x07) + 1);
// 3 - sort flag
// 4-5 - reserved lctSize = 2 << (packed & 7); // 6-8 - local color
// table size
interlace = (packed & 0x40) != 0;
if (lctFlag) {
lct = readColorTable(lctSize); // read table
act = lct; // make local table active
} else {
act = gct; // make global table active
if (bgIndex == transIndex) {
bgColor = 0;
}
}
int save = 0;
if (transparency) {
save = act[transIndex];
act[transIndex] = 0; // set transparent color if specified
}
if (act == null) {
status = STATUS_FORMAT_ERROR; // no color table defined
}
if (err()) {
return;
}
decodeBitmapData(); // decode pixel data
skip();
if (err()) {
return;
}
frameCount++;
// create new image to receive frame data
image = Bitmap.createBitmap(width, height, Config.ARGB_4444);
setPixels(); // transfer pixel data to image
frames.addElement(new GifFrame(image, delay)); // add image to frame
// list
if (transparency) {
act[transIndex] = save;
}
resetFrame();
}
/**
* Reads Logical Screen Descriptor
*/
protected void readLSD() {
// logical screen size
width = readShort();
height = readShort();
// packed fields
int packed = read();
gctFlag = (packed & 0x80) != 0; // 1 : global color table flag
// 2-4 : color resolution
// 5 : gct sort flag
gctSize = 2 << (packed & 7); // 6-8 : gct size
bgIndex = read(); // background color index
pixelAspect = read(); // pixel aspect ratio
}
/**
* Reads Netscape extenstion to obtain iteration count
*/
protected void readNetscapeExt() {
do {
readBlock();
if (block[0] == 1) {
// loop count sub-block
int b1 = ((int) block[1]) & 0xff;
int b2 = ((int) block[2]) & 0xff;
loopCount = (b2 << 8) | b1;
}
} while ((blockSize > 0) && !err());
}
/**
* Reads next 16-bit value, LSB first
*/
protected int readShort() {
// read 16-bit value, LSB first
return read() | (read() << 8);
}
/**
* Resets frame state for reading next image.
*/
protected void resetFrame() {
lastDispose = dispose;
lrx = ix;
lry = iy;
lrw = iw;
lrh = ih;
lastBitmap = image;
lastBgColor = bgColor;
dispose = 0;
transparency = false;
delay = 0;
lct = null;
}
/**
* Skips variable length blocks up to and including next zero length block.
*/
protected void skip() {
do {
readBlock();
} while ((blockSize > 0) && !err());
}
}
クラスは https://github.com/Hipmob/gifanimateddrawable/blob/master/src/com/hipmob/gifanimationdrawable/GifAnimationDrawable.Java404からダウンロードできます。見つかりませんhttps://Gist.github.com/devunwired/4479231404見つかりません
上記のリンクが開いていない場合は、下のリンクからクラスを見つけることができます
私は https://stackoverflow.com/a/11736861/3514144 から賞賛するので、これが誰かの時間を節約することを願っていますが、それをimageviewに表示したい
また、リンクが利用できない場合は、Githubからクラスを見つけることもできます。
Glideを使用しない場合これを依存関係に追加して、独自の「gif」ImageViewを作成します。
implementation 'pl.droidsonroids.gif:Android-gif-drawable:1.2.0'
最小限のコード行で非常に効率的に動作します。例は次のとおりです。
<pl.droidsonroids.gif.GifImageView
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:id="@+id/dancer"
Android:src="@drawable/maddancer" />
または、単にxmlにWebViewを追加して、Webビュー内にgif画像をロードすることもできます。あなたは何もしなくていい。画像はウェブビュー内で自動的にループします
Android=でGIF画像を表示するための最善かつ最も簡単なソリューションであり、完全に機能します。
- Build.gradleを開きます（モジュール：アプリ）
- 依存関係を配置：コンパイル 'pl.droidsonroids.gif：Android-gif-drawable：1.1。+'
レイアウトフォルダーを開き、GIFコードを表示する場所に次のコードを配置します：e-g activity_main.xml
<pl.droidsonroids.gif.GifImageView Android:layout_width="150dp" Android:layout_height="wrap_content" Android:src="@drawable/your_gif_file_name"/>Android：src = "@ drawable/your_gif_file_name"、「your_gif_file_name」を目的のgif画像ファイルに置き換えます
残念ながら、gifは、それ自体ではImageView内でアニメーション化されません。これを処理するには、Viewの新しいサブクラスを作成する必要があります。
Glide（ https://github.com/bumptech/glide ）を使用：
GlideDrawableImageViewTarget imageViewTarget = new GlideDrawableImageViewTarget(imageview);
Glide.with(this).load(R.raw.mygif).into(imageViewTarget);
Glide はこれまでで最高のソリューションです。このコードを使用するだけ
String gifUrl = "http://part/to/your/gifFile.gif";
Glide
.with( context )
.load( gifUrl )
.into( imageViewGif );
フレスコライブラリをご覧ください。