我試圖在我的應用中使用.gif動畫圖像,但圖像不是動畫。在iPhone上它工作...爲什麼Android阻止動畫?任何解決方案爲什麼.gif動畫圖像不能在我的Android應用程序中動畫?
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A
回答
2
看起來很多人都希望動畫GIF能夠在Android上工作,但他們目前還沒有 - 請參閱Issue 3422 on the Android bug tracker。
看起來你可能能夠通過處理GIF動畫作爲電影根據http://androidosbeginning.blogspot.com/2010/09/gif-animation-in-android.html
類似的問題,其中有一個答案,可以幫助你做到這一點:Android: How do a display a large animated gif given a url?
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你可以做到這一點像這樣
這裏是示例代碼。
GIFDemo1.java
import java.io.InputStream;
import android.content.Context;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Movie;
import android.os.Bundle;
import android.view.View;
public class GIFDemo1 extends GraphicsActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new GIFView(this));
}
private static class GIFView extends View{
Movie movie,movie1;
InputStream is=null,is1=null;
long moviestart;
long moviestart1;
public GIFView(Context context) {
super(context);
is=context.getResources().openRawResource(R.drawable.cartoon);
is1=context.getResources().openRawResource(R.drawable.animated_gif);
movie=Movie.decodeStream(is);
movie1=Movie.decodeStream(is1);
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inJustDecodeBounds = true; // this will request the bm
opts.inSampleSize = 10;
//movie=Movie.decodeFile("C:\\cartoon.gif");
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawColor(0xFFCCCCCC);
super.onDraw(canvas);
long now=android.os.SystemClock.uptimeMillis();
System.out.println("now="+now);
if (moviestart == 0) { // first time
moviestart = now;
}
if(moviestart1==0)
{
moviestart1=now;
}
System.out.println("\tmoviestart="+moviestart);
int relTime = (int)((now - moviestart) % movie.duration()) ;
int relTime1=(int)((now - moviestart1)% movie1.duration());
System.out.println("time="+relTime+"\treltime="+movie.duration());
movie.setTime(relTime);
movie1.setTime(relTime1);
movie.draw(canvas,10,10);
movie1.draw(canvas,10,100);
this.invalidate();
}
}
}
GraphicsActivity.java
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
public class GraphicsActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void setContentView(View view) {
if (false) {
// set to true to test Picture
ViewGroup vg = new PictureLayout(this);
vg.addView(view);
view = vg;
}
super.setContentView(view);
}
}
PictureLayout.java
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Picture;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
public class PictureLayout extends ViewGroup {
private final Picture mPicture = new Picture();
public PictureLayout(Context context) {
super(context);
}
public PictureLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public void addView(View child) {
if (getChildCount() > 1) {
throw new IllegalStateException("PictureLayout can host only one direct child");
}
super.addView(child);
}
@Override
public void addView(View child, int index) {
if (getChildCount() > 1) {
throw new IllegalStateException("PictureLayout can host only one direct child");
}
super.addView(child, index);
}
@Override
public void addView(View child, LayoutParams params) {
if (getChildCount() > 1) {
throw new IllegalStateException("PictureLayout can host only one direct child");
}
super.addView(child, params);
}
@Override
public void addView(View child, int index, LayoutParams params) {
if (getChildCount() > 1) {
throw new IllegalStateException("PictureLayout can host only one direct child");
}
super.addView(child, index, params);
}
@Override
protected LayoutParams generateDefaultLayoutParams() {
return new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int count = getChildCount();
int maxHeight = 0;
int maxWidth = 0;
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != GONE) {
measureChild(child, widthMeasureSpec, heightMeasureSpec);
}
}
maxWidth += getPaddingLeft() + getPaddingRight();
maxHeight += getPaddingTop() + getPaddingBottom();
Drawable drawable = getBackground();
if (drawable != null) {
maxHeight = Math.max(maxHeight, drawable.getMinimumHeight());
maxWidth = Math.max(maxWidth, drawable.getMinimumWidth());
}
setMeasuredDimension(resolveSize(maxWidth, widthMeasureSpec),
resolveSize(maxHeight, heightMeasureSpec));
}
private void drawPict(Canvas canvas, int x, int y, int w, int h,
float sx, float sy) {
canvas.save();
canvas.translate(x, y);
canvas.clipRect(0, 0, w, h);
canvas.scale(0.5f, 0.5f);
canvas.scale(sx, sy, w, h);
canvas.drawPicture(mPicture);
canvas.restore();
}
@Override
protected void dispatchDraw(Canvas canvas) {
super.dispatchDraw(mPicture.beginRecording(getWidth(), getHeight()));
mPicture.endRecording();
int x = getWidth()/2;
int y = getHeight()/2;
if (false) {
canvas.drawPicture(mPicture);
} else {
drawPict(canvas, 0, 0, x, y, 1, 1);
drawPict(canvas, x, 0, x, y, -1, 1);
drawPict(canvas, 0, y, x, y, 1, -1);
drawPict(canvas, x, y, x, y, -1, -1);
}
}
@Override
public ViewParent invalidateChildInParent(int[] location, Rect dirty) {
location[0] = getLeft();
location[1] = getTop();
dirty.set(0, 0, getWidth(), getHeight());
return getParent();
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int count = super.getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != GONE) {
final int childLeft = getPaddingLeft();
final int childTop = getPaddingTop();
child.layout(childLeft, childTop,
childLeft + child.getMeasuredWidth(),
childTop + child.getMeasuredHeight());
}
}
}
}
豪這對你有幫助。 它不適用於非常複雜的gif。
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