XListViewHeader

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package com.example.day_13demo1.view;import android.content.Context;import android.util.AttributeSet;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.animation.Animation;import android.view.animation.RotateAnimation;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ProgressBar;import android.widget.TextView;import com.example.day_13demo1.R;/** * Created by dell on 2017/10/14. */public class XListViewHeader extends LinearLayout {    private LinearLayout mContainer;    private ImageView mArrowImageView;    private ProgressBar mProgressBar;    private TextView mHintTextView;    private int mState = STATE_NORMAL;    private Animation mRotateUpAnim;    private Animation mRotateDownAnim;    private final int ROTATE_ANIM_DURATION = 180;    public final static int STATE_NORMAL = 0;    public final static int STATE_READY = 1;    public final static int STATE_REFRESHING = 2;    public XListViewHeader(Context context) {        super(context);        initView(context);    }    /**     * @param context     * @param attrs     */    public XListViewHeader(Context context, AttributeSet attrs) {        super(context, attrs);        initView(context);    }    private void initView(Context context) {        // 初始情况，设置下拉刷新view高度为0        LayoutParams lp = new LayoutParams(                LayoutParams.FILL_PARENT, 0);        mContainer = (LinearLayout) LayoutInflater.from(context).inflate(                R.layout.xlistview_header, null);        addView(mContainer, lp);        setGravity(Gravity.BOTTOM);        mArrowImageView = (ImageView)findViewById(R.id.xlistview_header_arrow);        mHintTextView = (TextView)findViewById(R.id.xlistview_header_hint_textview);        mProgressBar = (ProgressBar)findViewById(R.id.xlistview_header_progressbar);        mRotateUpAnim = new RotateAnimation(0.0f, -180.0f,                Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,                0.5f);        mRotateUpAnim.setDuration(ROTATE_ANIM_DURATION);        mRotateUpAnim.setFillAfter(true);        mRotateDownAnim = new RotateAnimation(-180.0f, 0.0f,                Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,                0.5f);        mRotateDownAnim.setDuration(ROTATE_ANIM_DURATION);        mRotateDownAnim.setFillAfter(true);    }    public void setState(int state) {        if (state == mState) return ;        if (state == STATE_REFRESHING) {   // 显示进度            mArrowImageView.clearAnimation();            mArrowImageView.setVisibility(View.INVISIBLE);            mProgressBar.setVisibility(View.VISIBLE);        } else {   // 显示箭头图片            mArrowImageView.setVisibility(View.VISIBLE);            mProgressBar.setVisibility(View.INVISIBLE);        }        switch(state){            case STATE_NORMAL:                if (mState == STATE_READY) {                    mArrowImageView.startAnimation(mRotateDownAnim);                }                if (mState == STATE_REFRESHING) {                    mArrowImageView.clearAnimation();                }                mHintTextView.setText(R.string.xlistview_header_hint_normal);                break;            case STATE_READY:                if (mState != STATE_READY) {                    mArrowImageView.clearAnimation();                    mArrowImageView.startAnimation(mRotateUpAnim);                    mHintTextView.setText(R.string.xlistview_header_hint_ready);                }                break;            case STATE_REFRESHING:                mHintTextView.setText(R.string.xlistview_header_hint_loading);                break;            default:        }        mState = state;    }    public void setVisiableHeight(int height) {        if (height < 0)            height = 0;        LayoutParams lp = (LayoutParams) mContainer                .getLayoutParams();        lp.height = height;        mContainer.setLayoutParams(lp);    }    public int getVisiableHeight() {        return mContainer.getLayoutParams().height;    }}
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