如何在安卓中播放 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 应用程序来播放我自己的 GIF，这是代码片段

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();
    }
}
}

ma​​in.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 android:targetSdkVersion="19" GIF跑步，请帮我解决这个谜语.

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 UPDATED ANSWER

要在 android 中播放 GIF，请使用 Glide 库来加载任何图像或 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 加载普通图像、来自服务器的图像甚至加载 GIF.还可以查看 Picasso android 图像加载库，它类似于 Glide 但截至目前(2017 年 4 月 16 日)毕加索尚不支持在 android 中加载 GIF.

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

对于所有想在您的应用中播放 GIF 的人，请找到下面的代码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();
}

}

在您的活动类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" />

这篇关于如何在安卓中播放 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！