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NeteaseRefreshHeaderView.java
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NeteaseRefreshHeaderView.java
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package me.jingbin.byrecyclerview.view;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.drawable.AnimationDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import me.jingbin.byrecyclerview.R;
import me.jingbin.library.BaseRefreshHeader;
/**
* @author jingbin
*/
public class NeteaseRefreshHeaderView extends LinearLayout implements BaseRefreshHeader {
private static final int ROTATE_ANIM_DURATION = 180;
private TextView tvRefreshTip;
private ImageView mIvArrow;
private ImageView mProgress;
private LinearLayout mContainer;
private Animation mRotateUpAnim;
private Animation mRotateDownAnim;
private int mState = STATE_NORMAL;
private int mMeasuredHeight;
private AnimationDrawable mAnimationDrawable;
public NeteaseRefreshHeaderView(Context context) {
super(context);
initView(context);
}
private void initView(Context context) {
LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, 0);
mContainer = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.refresh_view_netease, null);
addView(mContainer, lp);
setGravity(Gravity.BOTTOM);
mIvArrow = (ImageView) mContainer.findViewById(R.id.iv_arrow);
mProgress = (ImageView) mContainer.findViewById(R.id.iv_progress);
tvRefreshTip = (TextView) mContainer.findViewById(R.id.tv_refresh_tip);
mAnimationDrawable = (AnimationDrawable) mProgress.getDrawable();
measure(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
mMeasuredHeight = getMeasuredHeight();
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);
this.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
}
@Override
public void onMove(float delta) {
if (getVisibleHeight() > 0 || delta > 0) {
setVisibleHeight((int) delta + getVisibleHeight());
if (mState <= STATE_RELEASE_TO_REFRESH) {
if (getVisibleHeight() > mMeasuredHeight) {
setState(STATE_RELEASE_TO_REFRESH);
} else {
setState(STATE_NORMAL);
}
}
}
}
@Override
public void setState(int state) {
if (state == mState) {
return;
}
if (mAnimationDrawable.isRunning()) {
mAnimationDrawable.stop();
}
tvRefreshTip.setVisibility(VISIBLE);
if (state == STATE_REFRESHING) {
// show progress
mIvArrow.clearAnimation();
mIvArrow.setVisibility(View.INVISIBLE);
mProgress.setVisibility(View.VISIBLE);
smoothScrollTo(mMeasuredHeight);
} else if (state == STATE_DONE) {
mIvArrow.clearAnimation();
mIvArrow.setVisibility(View.VISIBLE);
mProgress.setVisibility(View.INVISIBLE);
} else {
// show arrow image
mIvArrow.setVisibility(View.VISIBLE);
mProgress.setVisibility(View.INVISIBLE);
}
switch (state) {
case STATE_NORMAL:
if (mState == STATE_RELEASE_TO_REFRESH) {
mIvArrow.startAnimation(mRotateDownAnim);
}
if (mState == STATE_REFRESHING) {
mIvArrow.clearAnimation();
}
tvRefreshTip.setText(R.string.custom_header_hint_normal);
break;
case STATE_RELEASE_TO_REFRESH:
mIvArrow.clearAnimation();
mIvArrow.startAnimation(mRotateUpAnim);
tvRefreshTip.setText(R.string.custom_header_hint_release);
break;
case STATE_REFRESHING:
tvRefreshTip.setText(R.string.custom_refreshing);
if (!mAnimationDrawable.isRunning()) {
mAnimationDrawable.start();
}
break;
case STATE_DONE:
tvRefreshTip.setText(R.string.custom_header_hint_normal);
break;
default:
}
mState = state;
}
@Override
public boolean releaseAction() {
boolean isOnRefresh = false;
if (getVisibleHeight() > mMeasuredHeight && mState < STATE_REFRESHING) {
setState(STATE_REFRESHING);
isOnRefresh = true;
}
int destHeight = 0;
if (mState == STATE_REFRESHING) {
// 处理刷新中时,让其定位到 destHeight 高度
destHeight = mMeasuredHeight;
}
smoothScrollTo(destHeight);
return isOnRefresh;
}
@Override
public void refreshComplete() {
setState(STATE_DONE);
smoothScrollTo(0);
}
private void smoothScrollTo(final int destHeight) {
ValueAnimator animator = ValueAnimator.ofInt(getVisibleHeight(), destHeight);
animator.setDuration(300).start();
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
setVisibleHeight((int) animation.getAnimatedValue());
}
});
animator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
if (destHeight == 0) {
setState(STATE_NORMAL);
}
}
});
animator.start();
}
private void setVisibleHeight(int height) {
if (height < 0) {
height = 0;
}
LayoutParams lp = (LayoutParams) mContainer.getLayoutParams();
lp.height = height;
mContainer.setLayoutParams(lp);
}
@Override
public int getVisibleHeight() {
return mContainer.getHeight();
}
@Override
public int getState() {
return mState;
}
}