如何在Android中播放GIF [英] How to play GIF in android
问题描述
你好stackoverflow我正在尝试开发一个Android应用程序来播放自己的GIF，这是代码段
Hello stackoverflow I'm trying to develop an android application to play my own GIF, here is the code snippet
MainActivity.java
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
AnimationView.java
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Movie;
import android.util.AttributeSet;
import android.view.View;
public class AnimationView extends View {
private Movie mMovie;
private long mMovieStart;
private static final boolean DECODE_STREAM = true;
private int mDrawLeftPos;
private int mHeight, mWidth;
private static byte[] streamToBytes(InputStream is) {
ByteArrayOutputStream os = new ByteArrayOutputStream(1024);
byte[] buffer = new byte[1024];
int len;
try {
while ((len = is.read(buffer)) >= 0) {
os.write(buffer, 0, len);
}
} catch (java.io.IOException e) {
}
return os.toByteArray();
}
public AnimationView(Context context, AttributeSet attrs) {
super(context, attrs);
setFocusable(true);
java.io.InputStream is;
is = context.getResources().openRawResource(R.drawable.scanning);
if (DECODE_STREAM) {
mMovie = Movie.decodeStream(is);
} else {
byte[] array = streamToBytes(is);
mMovie = Movie.decodeByteArray(array, 0, array.length);
}
}
@Override
protected void onMeasure( int widthMeasureSpec, int heightMeasureSpec )
{
int p_top = this.getPaddingTop(), p_bottom = this.getPaddingBottom();
mWidth = mMovie.width();
mHeight = mMovie.height();
// Calculate new desired height
final int desiredHSpec = MeasureSpec.makeMeasureSpec( mHeight + p_top + p_bottom , MeasureSpec.EXACTLY );
setMeasuredDimension( widthMeasureSpec, desiredHSpec );
super.onMeasure( widthMeasureSpec, desiredHSpec );
// Update the draw left position
mDrawLeftPos = Math.max( ( this.getWidth() - mWidth ) / 2, 0) ;
}
@Override
public void onDraw(Canvas canvas) {
long now = android.os.SystemClock.uptimeMillis();
if (mMovieStart == 0) { // first time
mMovieStart = now;
}
if (mMovie != null) {
int dur = mMovie.duration();
if (dur == 0) {
dur = 3000;
}
int relTime = (int) ((now - mMovieStart) % dur);
// Log.d("", "real time :: " +relTime);
mMovie.setTime(relTime);
mMovie.draw(canvas, mDrawLeftPos, this.getPaddingTop());
invalidate();
}
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF"
android:orientation="vertical" >
<com.example.androidgifwork.AnimationView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
</LinearLayout>
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidgifwork"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name="com.example.androidgifwork.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
当我运行上面的代码片段时，GIF根本没有运行，但是当我删除了android:targetSdkVersion="19" GIF运行时，请帮助我解决这个难题.
When I run the above code snippet GIF is not at all running, but when I remove android:targetSdkVersion="19" GIF running, please help me to solve this riddle.
谢谢
推荐答案
2017更新后的答案
要在android中播放GIF，请使用 Glide 库加载任何图像或GIF.
2017 UPDATED ANSWER
To play GIF in android use Glide library to load any image or GIF.
Glide.with(context)
.load(YOUR_GIF)
.into(YOUR_IMAGE_VIEW);
使用 Glide 可以加载普通图像，服务器中的图像，甚至还可以加载GIF.还可以查看 Picasso android图片加载库，该库类似于 Glide ，但截至目前( 2017年4月16日)，毕加索尚不支持 GIF 在Android中加载.
Use Glide to load normal images, images from server or even to load GIF as well. Also have a look at Picasso android image loading library which is similar to Glide but as of now(16 Apr 2017) Picasso doesn't support GIF loading in android yet.
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旧答案
对于所有想要在您的应用中播放GIF的人，请找到下面的代码
PlayGifView.java
OLD ANSWER
For all Those who want to play GIF in your app please find the code below
PlayGifView.java
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Movie;
import android.os.Build;
import android.util.AttributeSet;
import android.view.View;
public class PlayGifView extends View{
private static final int DEFAULT_MOVIEW_DURATION = 1000;
private int mMovieResourceId;
private Movie mMovie;
private long mMovieStart = 0;
private int mCurrentAnimationTime = 0;
@SuppressLint("NewApi")
public PlayGifView(Context context, AttributeSet attrs) {
super(context, attrs);
/**
* Starting from HONEYCOMB have to turn off HardWare acceleration to draw
* Movie on Canvas.
*/
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
}
public void setImageResource(int mvId){
this.mMovieResourceId = mvId;
mMovie = Movie.decodeStream(getResources().openRawResource(mMovieResourceId));
requestLayout();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if(mMovie != null){
setMeasuredDimension(mMovie.width(), mMovie.height());
}else{
setMeasuredDimension(getSuggestedMinimumWidth(), getSuggestedMinimumHeight());
}
}
@Override
protected void onDraw(Canvas canvas) {
if (mMovie != null){
updateAnimtionTime();
drawGif(canvas);
invalidate();
}else{
drawGif(canvas);
}
}
private void updateAnimtionTime() {
long now = android.os.SystemClock.uptimeMillis();
if (mMovieStart == 0) {
mMovieStart = now;
}
int dur = mMovie.duration();
if (dur == 0) {
dur = DEFAULT_MOVIEW_DURATION;
}
mCurrentAnimationTime = (int) ((now - mMovieStart) % dur);
}
private void drawGif(Canvas canvas) {
mMovie.setTime(mCurrentAnimationTime);
mMovie.draw(canvas, 0, 0);
canvas.restore();
}
}
在您的活动班级中，使用以下代码播放GIF
PlayGifView pGif = (PlayGifView) findViewById(R.id.viewGif);
pGif.setImageResource(<Your GIF file name Eg: R.drawable.infinity_gif>);
XML布局
<yourPacckageName.PlayGifView
android:id="@+id/viewGif"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
这篇关于如何在Android中播放GIF的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
