Android UI- PullToRrefresh 自定义下拉刷新动画，android 开发入门书
/PullToRefresh/src/com/handmark/pulltorefresh/library/internal/TweenAnimLoadingLayout.java
package com.handmark.pulltorefresh.library.internal;
import com.handmark.pulltorefresh.library.R;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Orientation;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.Drawable;
import android.view.View;
/**
@date 2015/1/8
@author wuwenjie
@desc 帧动画加载布局
*/
public class TweenAnimLoadingLayout extends LoadingLayout {
private AnimationDrawable animationDrawable;
public TweenAnimLoadingLayout(Context context, Mode mode,
Orientation scrollDirection, TypedArray attrs) {
super(context, mode, scrollDirection, attrs);
// 初始化
mHeaderImage.setImageResource(R.drawable.refresh_anim);
animationDrawable = (AnimationDrawable) mHeaderImage.getDrawable();
}
// 默认图片
@Override
protected int getDefaultDrawableResId() {
return R.drawable.loading1;
}
@Override
protected void onLoadingDrawableSet(Drawable imageDrawable) {
// NO-OP
}
@Override
protected void onPullImpl(float scaleOfLayout) {
// NO-OP
}
// 下拉以刷新
@Override
protected void pullToRefreshImpl() {
// NO-OP
}
// 正在刷新时回调
@Override
protected void refreshingImpl() {
// 播放帧动画
animationDrawable.start();
}
// 释放以刷新
@Override
protected void releaseToRefreshImpl() {
// NO-OP
}
// 重新设置
@Override
protected void resetImpl() {
mHeaderImage.setVisibility(View.VISIBLE);
mHeaderImage.clearAnimation();
}
}
我们只要修改开源项目中的 LodingLayout 代码：
/PullToRefresh/src/com/handmark/pulltorefresh/library/internal/LoadingLayout.java
/*******************************************************************************
Copyright 2011, 2012 Chris Banes.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*******************************************************************************/
package com.handmark.pulltorefresh.library.internal;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.TypedArray;
import android.graphics.Typeface;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.Drawable;
import android.text.TextUtils;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.handmark.pulltorefresh.library.ILoadingLayout;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Orientation;
import com.handmark.pulltorefresh.library.R;
@SuppressLint("ViewConstructor")
public abstract class LoadingLayout extends FrameLayout implements ILoadingLayout {
static final String LOG_TAG = "PullToRefresh-LoadingLayout";
static final Interpolator ANIMATION_INTERPOLATOR = new LinearInterpolator();
private FrameLayout mInnerLayout;
protected final ImageView mHeaderImage;
protected final ProgressBar mHeaderProgress;
private boolean mUseIntrinsicAnimation;
private final TextView mHeaderText;
private final TextView mSubHeaderText;
protected final Mode mMode;
protected final Orientation mScrollDirection;
private CharSequence mPullLabel;
private CharSequence mRefreshingLabel;
private CharSequence mReleaseLabel;
public LoadingLayout(Context context, final Mode mode, final Orientation scrollDirection, TypedArray attrs) {
super(context);
mMode = mode;
mScrollDirection = scrollDirection;
switch (scrollDirection) {
case HORIZONTAL:
LayoutInflater.from(context).inflate(R.layout.pull_to_refresh_header_horizontal, this);
break;
case VERTICAL:
default:
// LayoutInflater.from(context).inflate(R.layout.pull_to_refresh_header_vertical, this);
// 修改代码
LayoutInflater.from(context).inflate(R.layout.pull_to_refresh_header_simple, this);
break;
}
mInnerLayout = (FrameLayout) findViewById(R.id.fl_inner);
mHeaderText = (TextView) mInnerLayout.findViewById(R.id.pull_to_refresh_text);
mHeaderProgress = (ProgressBar) mInnerLayout.findViewById(R.id.pull_to_refresh_progress);
mSubHeaderText = (TextView) mInnerLayout.findViewById(R.id.pull_to_refresh_sub_text);
mHeaderImage = (ImageView) mInnerLayout.findViewById(R.id.pull_to_refresh_image);
FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mInnerLayout.getLayoutParams();
switch (mode) {
case PULL_FROM_END:
lp.gravity = scrollDirection == Orientation.VERTICAL ? Gravity.TOP : Gravity.LEFT;
// Load in labels
mPullLabel = context.getString(R.string.pull_to_refresh_from_bottom_pull_label);
mRefreshingLabel = context.getString(R.string.pull_to_refresh_from_bottom_refreshing_label);
mReleaseLabel = context.getString(R.string.pull_to_refresh_from_bottom_release_label);
break;
case PULL_FROM_START:
default:
lp.gravity = scrollDirection == Orientation.VERTICAL ? Gravity.BOTTOM : Gravity.RIGHT;
// Load in labels
mPullLabel = context.getString(R.string.pull_to_refresh_pull_label);
mRefreshingLabel = context.getString(R.string.pull_to_refresh_refreshing_label);
mReleaseLabel = context.getString(R.string.pull_to_refresh_release_label);
break;
}
if (attrs.hasValue(R.styleable.PullToRefresh_ptrHeaderBackground)) {
Drawable background = attrs.getDrawable(R.styleable.PullToRefresh_ptrHeaderBackground);
if (null != background) {
ViewCompat.setBackground(this, background);
}
}
// if (attrs.hasValue(R.styleable.PullToRefresh_ptrHeaderTextAppearance)) {
// TypedValue styleID = new TypedValue();
// attrs.getValue(R.styleable.PullToRefresh_ptrHeaderTextAppearance, styleID);
// setTextAppearance(styleID.data);
// }
// if (attrs.hasValue(R.styleable.PullToRefresh_ptrSubHeaderTextAppearance)) {
// TypedValue styleID = new TypedValue();
// attrs.getValue(R.styleable.PullToRefresh_ptrSubHeaderTextAppearance, styleID);
// setSubTextAppearance(styleID.data);
// }
//
// // Text Color attrs need to be set after TextAppearance attrs
// if (attrs.hasValue(R.styleable.PullToRefresh_ptrHeaderTextColor)) {
// ColorStateList colors = attrs.getColorStateList(R.styleable.PullToRefresh_ptrHeaderTextColor);
// if (null != colors) {
// setTextColor(colors);
// }
// }
// if (attrs.hasValue(R.styleable.PullToRefresh_ptrHeaderSubTextColor)) {
// ColorStateList colors = attrs.getColorStateList(R.styleable.PullToRefresh_ptrHeaderSubTextColor);
// if (null != colors) {
// setSubTextColor(colors);
// }
// }
// Try and get defined drawable from Attrs
Drawable imageDrawable = null;
if (attrs.hasValue(R.styleable.PullToRefresh_ptrDrawable)) {
imageDrawable = attrs.getDrawable(R.styleable.PullToRefresh_ptrDrawable);
}
// Check Specific Drawable from Attrs, these overrite the generic
// drawable attr above
switch (mode) {
case PULL_FROM_START:
default:
if (attrs.hasValue(R.styleable.PullToRefresh_ptrDrawableStart)) {
imageDrawable = attrs.getDrawable(R.styleable.PullToRefresh_ptrDrawableStart);
} else if (attrs.hasValue(R.styleable.PullToRefresh_ptrDrawableTop)) {
Utils.warnDeprecation("ptrDrawableTop", "ptrDrawableStart");
imageDrawable = attrs.getDrawable(R.styleable.PullToRefresh_ptrDrawableTop);
}
break;
case PULL_FROM_END:
if (attrs.hasValue(R.styleable.PullToRefresh_ptrDrawableEnd)) {
imageDrawable = attrs.getDrawable(R.styleable.PullToRefresh_ptrDrawableEnd);
} else if (attrs.hasValue(R.styleable.PullToRefresh_ptrDrawableBottom)) {
Utils.warnDeprecation("ptrDrawableBottom", "ptrDrawableEnd");
imageDrawable = attrs.getDrawable(R.styleable.PullToRefresh_ptrDrawableBottom);
}
break;
}
// If we don't have a user defined drawable, load the default
if (null == imageDrawable) {
imageDrawable = context.getResources().getDrawable(getDefaultDrawableResId());
}
// Set Drawable, and save width/height
setLoadingDrawable(imageDrawable);
reset();
}
publi
c final void setHeight(int height) {
ViewGroup.LayoutParams lp = getLayoutParams();
lp.height = height;
requestLayout();
}
public final void setWidth(int width) {
ViewGroup.LayoutParams lp = getLayoutParams();
lp.width = width;
requestLayout();
}
public final int getContentSize() {
switch (mScrollDirection) {
case HORIZONTAL:
return mInnerLayout.getWidth();
case VERTICAL:
default:
return mInnerLayout.getHeight();
}
}
public final void hideAllViews() {
// if (View.VISIBLE == mHeaderText.getVisibility()) {
// mHeaderText.setVisibility(View.INVISIBLE);
// }
// if (View.VISIBLE == mHeaderProgress.getVisibility()) {
// mHeaderProgress.setVisibility(View.INVISIBLE);
// }
// if (View.VISIBLE == mHeaderImage.getVisibility()) {
// mHeaderImage.setVisibility(View.INVISIBLE);
// }
// if (View.VISIBLE == mSubHeaderText.getVisibility()) {
// mSubHeaderText.setVisibility(View.INVISIBLE);
// }
}
public final void onPull(float scaleOfLayout) {
if (!mUseIntrinsicAnimation) {
onPullImpl(scaleOfLayout);
}
}
public final void pullToRefresh() {
// if (null != mHeaderText) {
// mHeaderText.setText(mPullLabel);
// }
// Now call the callback
pullToRefreshImpl();
}
public final void refreshing() {
if (null != mHeaderText) {
mHeaderText.setText(mRefreshingLabel);
}
if (mUseIntrinsicAnimation) {
((AnimationDrawable) mHeaderImage.getDrawable()).start();
} else {
// Now call the callback
refreshingImpl();
}
// if (null != mSubHeaderText) {
// mSubHeaderText.setVisibility(View.GONE);
// }
}
public final void releaseToRefresh() {
// if (null != mHeaderText) {
// mHeaderText.setText(mReleaseLabel);
// }
// Now call the callback
releaseToRefreshImpl();
}
public final void reset() {
// if (null != mHeaderText) {
// mHeaderText.setText(mPullLabel);
// }
mHeaderImage.setVisibility(View.VISIBLE);
if (mUseIntrinsicAnimation) {
((AnimationDrawable) mHeaderImage.getDrawable()).stop();
} else {
// Now call the callback
resetImpl();
}
// if (null != mSubHeaderText) {
// if (TextUtils.isEmpty(mSubHeaderText.getText())) {
// mSubHeaderText.setVisibility(View.GONE);
// } else {
// mSubHeaderText.setVisibility(View.VISIBLE);
// }
// }
}
@Override
public void setLastUpdatedLabel(CharSequence label) {
// setSubHeaderText(label);
}
@Override
public final void setLoadingDrawable(Drawable imageDrawable) {
// Set Drawable
mHeaderImage.setImageDrawable(imageDrawable);
mUseIntrinsicAnimation = (imageDrawable instanceof AnimationDrawable);
// Now call the callback
onLoadingDrawableSet(imageDrawable);
}
@Override
public void setPullLabel(CharSequence pullLabel) {
mPullLabel = pullLabel;
}
@Override
public void setRefreshingLabel(CharSequence refreshingLabel) {
mRefreshingLabel = refreshingLabel;
}
@Override
public void setReleaseLabel(CharSequence releaseLabel) {
mReleaseLabel = releaseLabel;
}
@Override
public void setTextTypeface(Typeface tf) {
mHeaderText.setTypeface(tf);
}
public final void showInvisibleViews() {
// if (View.INVISIBLE == mHeaderText.getVisibility()) {
// mHeaderText.setVisibility(View.VISIBLE);
// }
// if (View.INVISIBLE == mHeaderProgress.getVisibility()) {
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