在任的WebView或自定义视图的Gif播放 [英] Play Gif in either WebView or Custom View
问题描述
在简单地说，我有一个活动A，它适用的setContentView（R.id.layout_a）和一个将持续5秒运行。
In a nutshell, I have an Activity A, which applied setContentView(R.id.layout_a), and A will run for 5 seconds.
我试图定义一个自定义视图类和使用Movie类加载GIF，然后安装自定义视图 layout_a ，但它显示只是空白。
I tried to define a custom View class and using Movie class to load the gif, then attach the custom view to layout_a but it displays just blank.
我试过的WebView，它可以显示GIF良好，但GIF动画可以仅在第一次我启动这一活动。它只会显示最后一帧时，后来推出的一个活动。
I tried WebView, it can display the gif well, but the gif can animate only the first time I launch this activity. It will just show the last frame when later activity A is launched.
我试过 WebView.reload（），但没有甜味。
下面是试图以应用的WebView，当我的code：
Here's my code when trying to apply the WebView:
public class activityA extends Activity {
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.activity_a);
WebView splashFrame = (WebView)findViewById(R.id.splashFrame);
splashFrame.setBackgroundColor(Color.TRANSPARENT);
splashFrame.loadDataWithBaseURL("file:///android_res/drawable/", "<img align='middle' src='face_morph_gif.gif' width='100%' />", "text/html", "utf-8", null);
splashFrame.reload();
Handler handler = new Handler();
// run a thread after 3 seconds to start the home screen
handler.postDelayed(new Runnable() {
@Override
public void run() {
// make sure we close the splash screen so the user won't come back when it presses back key
finish();
// start the home screen
Intent intent = new Intent(activityA.this, activityB.class);
SplashScreenActivity.this.startActivity(intent);
}
}, 5000);
}
}
所以，这才是我的问题1 ：如何从一开始就使这个GIF玩的时候推出活动阿？我注意到，当我打开使用Safari / Chrome浏览GIF，它将发挥只有一次，直到我手动刷新浏览器。
So here comes my Question 1: How to make this gif play from the beginning when I launch activity A? I noticed that when I open this gif using Safari/Chrome, it will play just once till I manually refresh the browser.
这是我一直在寻找到第一个方式，但我不能找到工作，甚至一次。
This is the first way I was looking into but I couldn't get work even once.
活动A code：
public class activityA extends Activity {
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.activity_a);
Handler handler = new Handler();
// run a thread after 3 seconds to start the home screen
handler.postDelayed(new Runnable() {
@Override
public void run() {
// make sure we close the splash screen so the user won't come back when it presses back key
finish();
// start the home screen
Intent intent = new Intent(activityA.this, activityB.class);
SplashScreenActivity.this.startActivity(intent);
}
}, 5000);
}
}
在Custome查看：
The Custome View:
public class GifView extends View {
public Movie mMovie;
public long mMovieStart;
public GifView(Context context) {
super(context);
setFocusable(true);
InputStream is = context.getResources().openRawResource(R.drawable.face_morph_gif);
mMovie = Movie.decodeStream(is);
}
public GifView(Context context, AttributeSet attr) {
super(context, attr);
setFocusable(true);
InputStream is = context.getResources().openRawResource(R.drawable.face_morph_gif);
mMovie = Movie.decodeStream(is);
}
public GifView(Context context, AttributeSet attr, int defStyle) {
super(context, attr, defStyle);
setFocusable(true);
InputStream is = context.getResources().openRawResource(R.drawable.face_morph_gif);
mMovie = Movie.decodeStream(is);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// canvas.drawColor(Color.TRANSPARENT);
final long now = SystemClock.uptimeMillis();
if (mMovieStart == 0) {
mMovieStart = now;
}
if (mMovie != null) {
int dur = mMovie.duration();
// Log.d("gif Canvas", "duration: " + mMovie.duration());
if (dur == 0) {
dur = 4000;
}
int relTime = (int)((now - mMovieStart) % dur);
mMovie.setTime(relTime);
mMovie.draw(canvas, 10, 10);
// Log.d("gif Canvas", mMovie.width() + "x" + mMovie.height());
invalidate();
}
}
@Override
protected void onMeasure(final int widthMeasureSpec,
final int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension(getMeasuredWidth(), getMeasuredHeight());
}
}
和layout_a的XML
And the xml of layout_a
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/app_background"
tools:ignore="ContentDescription" >
<ImageView
... />
<ImageView
... />
<ImageView
... />
<ImageView
... />
<com.xxx.GifView
android:id="@+id/splashFrame"
android:layout_width="95dp"
android:layout_height="156dp"
android:visibility="visible" />
所以，这才是我的问题2 ：为什么这个自定义视图无法显示GIF？我设置的onDraw 破发点的方法和我肯定mMovie可以加载GIF（mMovie可以返回GIF的正确宽度和高度）
So here comes my Question 2: Why this custom view can't display the gif? I set break points in onDraw method and I am sure the mMovie can load the gif (mMovie can return correct width and height of the gif)
我知道获得的gif在Android上工作是一个很老的话题，据我所知有3种方式：
I know getting gif to work on Android is a quite old topic, AFAIK there are 3 ways:
-
电影类
Movie Class
自定义视图
拆分GIF / Android的使用动画
Split GIF/Use Android Animation
我不能使用第三条道路，因为我用的是GIF有100帧，它并不便宜。
I can't use the third way because the gif I am using has 100 frames, and its not cheap.
我已经通过所有的教程和SO的问题，但没有人可以使这项工作。
I've go through all the tutorials and SO questions, but none of them can make this work.
感谢您阅读我的问题。
推荐答案
为了在你的Android手机玩GIF动画，我建议你使用的WebView（仅适用于Android 2.2的更高）。
In order to play a GIF animation in your android phone, I suggest you to use a WebView (only for Android 2.2 an higher).
有一个很好的教程可以在这里找到：
的http://droid-blog.net/2011/10/17/tutorial-how-to-play-animated-gifs-in-android-part-3/
A good tutorial can be found here: http://droid-blog.net/2011/10/17/tutorial-how-to-play-animated-gifs-in-android-part-3/
小心清除缓存，以便每次你打开你的WebView时间玩GIF动画。使用 webView.clearCache（假）;
Be careful to clear the cache in order to play the animated GIF each time you open your WebView. Use webView.clearCache(false);
享受。
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