<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>

package com.example.ndkdemo;

import android.graphics.Bitmap;

public class GifInfoHandle {

    private  volatile  long gifInfoPtr;

    static {

        System.loadLibrary("android_gif");

    }

    public GifInfoHandle(String path)

    {

        gifInfoPtr=openFile(path);

    }

public long renderFrame(Bitmap bitmap)

{

   return renderFrame(gifInfoPtr,bitmap);

}

public  synchronized  int getwidth()

{

return  getwidth(gifInfoPtr);

}

    public  synchronized  int getHeight()

    {

        return  getheight(gifInfoPtr);

    }

    //调用 native

    private  native  long openFile(String path); //打开文件路径

    private  native  long renderFrame( long gifInfoPtr, Bitmap bitmap); //获取帧率

    private  native  int getwidth(long gifInfoPtr); //获取宽度

    private  native  int getheight(long gifInfoPtr); //获取高度

}

jint getwidth(GifInfo *info){

    return info->originalWidth;

}

jint getHeight(GifInfo *info){

    return  info->originalHeight;

}

JNIEXPORT jlong JNICALL

Java_com_example_ndkdemo_GifInfoHandle_openFile(JNIEnv *env, jobject thiz, jstring path) {

    // TODO: implement openFile()

    return openFile(env,path);

}

JNIEXPORT jlong JNICALL

Java_com_example_ndkdemo_GifInfoHandle_renderFrame(JNIEnv *env, jobject thiz, jlong gif_info_ptr,

                                                   jobject bitmap) {

    // TODO: implement renderFrame()

    return  renderFrame(env,gif_info_ptr,bitmap);

}

JNIEXPORT jint JNICALL

Java_com_example_ndkdemo_GifInfoHandle_getwidth(JNIEnv *env, jobject thiz, jlong gif_info_ptr) {

    // TODO: implement getwidth()

 getwidth(gif_info_ptr);

}

JNIEXPORT jint JNICALL

Java_com_example_ndkdemo_GifInfoHandle_getheight(JNIEnv *env, jobject thiz, jlong gif_info_ptr) {

    // TODO: implement getheight()

    getHeight(gif_info_ptr);

}

package com.example.ndkdemo;

import androidx.annotation.NonNull;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Bitmap;

import android.os.Bundle;

import android.os.Environment;

import android.os.Handler;

import android.os.Message;

import android.util.Log;

import android.widget.ImageView;

import android.widget.TextView;

import java.io.File;

public class MainActivity extends AppCompatActivity {

    // Used to load the 'native-lib' library on application startup.

    private ImageView imageView;

    private String path = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "ds.gif";

    private Bitmap bitmap;

    private GifInfoHandle infoHandle;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Log.e("TAG", "onCreate: "+path );

        imageView=findViewById(R.id.image);

        infoHandle=new GifInfoHandle(path);

        int width=infoHandle.getwidth();

        int height=infoHandle.getHeight();

        bitmap =Bitmap.createBitmap(width,height,Bitmap.Config.ARGB_8888);

        imageView.setImageBitmap(bitmap);

        long nextFrameTime=infoHandle.renderFrame(bitmap);

        infoHandle.renderFrame(bitmap);

        //循环绘制

        handler.sendEmptyMessageDelayed(1,nextFrameTime);

    }

    Handler handler=new Handler(){

        @Override

        public void handleMessage(@NonNull Message msg) {

            super.handleMessage(msg);

            long nextFrameTime =infoHandle.renderFrame(bitmap);

            imageView.setImageBitmap(bitmap);

            handler.sendEmptyMessageDelayed(1,nextFrameTime);

        }

    };

    }