使用可繪製動畫顯示動畫

Question

我已經在android開發人員網站上讀到了如何將圖像序列轉換爲動畫。但沒有顯示任何內容，無論是圖像而不是動畫。

package org.example.anim; 

import android.os.Bundle; 
import android.app.Activity; 
import android.graphics.drawable.AnimationDrawable; 
import android.widget.ImageView; 

public class MainActivity extends Activity { 

AnimationDrawable frameAnimation; 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 


    ImageView img = (ImageView)findViewById(R.id.spinning_wheel_image); 
    img.setBackgroundResource(R.drawable.spin_animation); 

     // Get the background, which has been compiled to an AnimationDrawable 
     frameAnimation = (AnimationDrawable) img.getBackground(); 

     // Start the animation (looped playback by default). 
    } 

public void onWindowFocusChanged() 
{ 

    frameAnimation.start(); 
} 


} 

Answer 1

，如果你已經添加多張圖片並且如果您的spin_animation名單是這樣的：

<animation-list xmlns:android="http://schemas.android.com/apk/res/android" 
    android:oneshot="true"> 
    <item android:drawable="@drawable/rocket_thrust1" android:duration="200" /> 
    <item android:drawable="@drawable/rocket_thrust2" android:duration="200" /> 
    <item android:drawable="@drawable/rocket_thrust3" android:duration="200" /> 
</animation-list> 

然後代碼必須工作，我覺得你有沒有產生這個名單properly.also看到這個鏈接獲得更多幫助animation drawable

Answer 2

ImageView progressSpinner = (ImageView) findViewById(R.id.progressSpinner); 

    // Set the background of the image - In this case an animation 
    // (/res/anim folder) 
    progressSpinner.setBackgroundResource(R.anim.progress_animation); 
    // Get the image background and attach the AnimationDrawable to it. 
    progressAnimation = (AnimationDrawable) progressSpinner.getBackground(); 
    progressAnimation.start(); 

將圖像從drawable移動到anim文件夾中，並在onCreate中嘗試此代碼。