Android自定义View实现loading动画加载效果

/** 
 * Created by xiedong on 2017/3/7. 
 */ 
public class Loading_view extends LinearLayout { 
  private Context mContext; 
  private RelativeLayout loading_content; 
  private ImageView img; 
  private TextView loadingText; 
  private AnimationDrawable animationDrawable; 
  public Loading_view(Context context) { 
    super(context); 
    mCOntext= context; 
    setupView(); 
  } 
  public Loading_view(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    mCOntext= context; 
    setupView(); 
  } 
  public Loading_view(Context context, AttributeSet attrs, int defStyleAttr) { 
    super(context, attrs, defStyleAttr); 
    mCOntext= context; 
    setupView(); 
  } 
  private void setupView() { 
//  View view= LayoutInflater.from(mContext).inflate(R.layout.loading_view_layout,this);   //一定要把布局添加进容器，不能为null 
    View.inflate(mContext, R.layout.loading_view_layout, this); 
    loading_cOntent= (RelativeLayout) findViewById(R.id.loading_content); 
    img = (ImageView) findViewById(R.id.img); 
    loadingText = (TextView) findViewById(R.id.text); 
    img.setImageResource(R.drawable.anim_loading); 
    animatiOnDrawable= ((AnimationDrawable) img.getDrawable()); 
    animationDrawable.start(); 
  } 
  public void setMessage(String msg) { 
    loadingText.setText(msg); 
  } 
} 

<&＃63;xml version="1.0" encoding="utf-8"&＃63;> 
 
   
     
     
   
 

private Loading_view loading_view; 
 loading_view = new Loading_view(this); //实例化自定义VIew 
 loading_view.setMessage("loading文字提示内容...."); 
 //添加当前自定义View进主布局文件 
 addContentView(loading_view, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));