播放GIF在android系統

朋友你好，我想在安卓玩GIF，我已經tryed驗證碼：播放GIF在android系統

package com.gifOperation; 

import java.io.InputStream; 

import android.app.Activity; 
import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Movie; 
import android.graphics.Paint; 
import android.os.Bundle; 
import android.view.View; 

public class gifOperation extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     setContentView(new GIFView(this)); 
    } 
    private static class GIFView extends View { 
     private static Movie movie; 
     InputStream is = null; 
     long moviestart; 

     public GIFView(Context context) { 
      super(context); 
      is = context.getResources().openRawResource(R.drawable.border_gif); 
      movie = Movie.decodeStream(is); 
     } 

     @Override 
     protected void onDraw(Canvas canvas) { 
      super.onDraw(canvas); 
      long now = android.os.SystemClock.uptimeMillis(); 
      if (moviestart == 0) { 
       moviestart = now; 
      } 
      int relTime = (int) ((now - moviestart) % movie.duration()); 
      movie.setTime(relTime); 
      movie.draw(canvas, 200, 200); 
      this.invalidate(); 
     } 
    } 


    }

但得到了一個錯誤

07-26 10:32:55.073: ERROR/AndroidRuntime(626): FATAL EXCEPTION: main 
07-26 10:32:55.073: ERROR/AndroidRuntime(626): java.lang.NullPointerException 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at com.gifOperation.gifOperation$GIFView.onDraw(gifOperation.java:40) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.View.draw(View.java:6740) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.ViewGroup.drawChild(ViewGroup.java:1640) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.View.draw(View.java:6743) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.widget.FrameLayout.draw(FrameLayout.java:352) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.ViewGroup.drawChild(ViewGroup.java:1640) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.View.draw(View.java:6743) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.widget.FrameLayout.draw(FrameLayout.java:352) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1842) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.ViewRoot.draw(ViewRoot.java:1407) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.ViewRoot.performTraversals(ViewRoot.java:1163) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1727) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.os.Looper.loop(Looper.java:123) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at java.lang.reflect.Method.invoke(Method.java:521) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
07-26 10:32:55.073: ERROR/AndroidRuntime(626):  at dalvik.system.NativeStart.main(Native Method)

有任何想法爲什麼這個問題提出？
感謝
帕特爾

來源

2011-07-26 kathiyawadi

可能重複：//計算器問題/ 3163706 /是它可能播放GIF格式在Android） – brendan

不，它不是重複我已經嘗試過，然後發表這個問題 – kathiyawadi

，因爲你必須定義其他構造器：是這樣的：

public GIFView(Context context, AttributeSet attrs){ 
     super(context,attrs); 
     is = context.getResources().openRawResource(R.drawable.border_gif); 
      movie = Movie.decodeStream(is); 
    } 
    public GIFView(Context context, AttributeSet attrs, int defStyle){ 
     super(context,attrs,defStyle); 
      is = context.getResources().openRawResource(R.drawable.border_gif); 
      movie = Movie.decodeStream(is); 
    }

的[是否有可能在Android的播放GIF格式？]（HTTP

來源

2011-10-15 08:48:15 JackTurky

播放GIF在android系統

回答

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