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Android 实现QQ扩展listview(expandlistview)

时间:2016-08-02 19:21:51      阅读:315      评论:0      收藏:0      [点我收藏+]

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Android 实现QQ扩展listview(expandlistview)


<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.yzj.android_8_2.ExpandListActivity">

    <ExpandableListView
        android:id="@+id/elv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></ExpandableListView>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:text="30dp"/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.example.yzj.android_8_2.CircleImageView
        android:id="@+id/civ"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:src="@mipmap/ic_launcher"/>
    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="match_parent" />
</LinearLayout>
package com.example.yzj.android_8_2;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ExpandListActivity extends AppCompatActivity {
    private MyAdapter myAdapter;
    private ExpandableListView elv;
    private String[] parentsData = {"农大炮友", "北科炮友", "美国炮友"};
    private String[][] childData = {{"张三", "李四", "王五"}, {"赵六", "李七", "林八"}, {"Alice", "lucy"}};
    private int[][] imgs = {{R.drawable.a, R.drawable.b, R.drawable.c}, {R.drawable.a, R.drawable.b, R.drawable.c}, {R.drawable.a, R.drawable.b}};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_expand_list);
        init();
        myAdapter=new MyAdapter();
        elv.setAdapter(myAdapter);
    }

    private void init() {
        elv = (ExpandableListView) findViewById(R.id.elv);
    }

    private class MyAdapter extends BaseExpandableListAdapter {

        @Override
        public int getGroupCount() {
            return parentsData.length;
        }

        @Override
        public int getChildrenCount(int groupPosition) {
            return childData.length;
        }

        @Override
        public Object getGroup(int groupPosition) {
            return null;
        }

        @Override
        public Object getChild(int groupPosition, int childPosition) {
            return null;
        }

        @Override
        public long getGroupId(int groupPosition) {
            return 0;
        }

        @Override
        public long getChildId(int groupPosition, int childPosition) {
            return 0;
        }

        @Override
        public boolean hasStableIds() {
            return false;
        }

        @Override
        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
            TextView tv = null;
            if (convertView == null) {
                convertView = View.inflate(ExpandListActivity.this, R.layout.layout_parents, null);
                tv =(TextView)convertView.findViewById(R.id.tv);
                convertView.setTag(tv);
            } else {
                tv = (TextView) convertView.getTag();
            }
                tv.setText(parentsData[groupPosition]);
            return convertView;
        }

        @Override
        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
            ViewHolder holder=null;
            if(convertView==null){
                convertView=View.inflate(ExpandListActivity.this,R.layout.layout_child,null);
                holder=new ViewHolder();
                holder.img=(CircleImageView)convertView.findViewById(R.id.civ);
                holder.tv=(TextView)convertView.findViewById(R.id.tv);
                convertView.setTag(holder);
            }
            else{
                holder = (ViewHolder)convertView.getTag();
            }
            holder.img.setImageResource(imgs[groupPosition][childPosition]);
            holder.tv.setText(childData[groupPosition][childPosition]);
            return convertView;
        }

        @Override
        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }
    }
    private class ViewHolder{
        CircleImageView img;
        TextView tv;
    }
}
//这是一个圆形的View的代码,用来绘制圆形View
/*
* Copyright 2014 - 2016 Henning Dodenhof * * 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.example.yzj.android_8_2; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.BitmapShader; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.ColorFilter; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.RectF; import android.graphics.Shader; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.ColorDrawable; import android.graphics.drawable.Drawable; import android.net.Uri; import android.support.annotation.ColorInt; import android.support.annotation.ColorRes; import android.support.annotation.DrawableRes; import android.util.AttributeSet; import android.widget.ImageView; public class CircleImageView extends ImageView { private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP; private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888; private static final int COLORDRAWABLE_DIMENSION = 2; private static final int DEFAULT_BORDER_WIDTH = 0; private static final int DEFAULT_BORDER_COLOR = Color.BLACK; private static final int DEFAULT_FILL_COLOR = Color.TRANSPARENT; private static final boolean DEFAULT_BORDER_OVERLAY = false; private final RectF mDrawableRect = new RectF(); private final RectF mBorderRect = new RectF(); private final Matrix mShaderMatrix = new Matrix(); private final Paint mBitmapPaint = new Paint(); private final Paint mBorderPaint = new Paint(); private final Paint mFillPaint = new Paint(); private int mBorderColor = DEFAULT_BORDER_COLOR; private int mBorderWidth = DEFAULT_BORDER_WIDTH; private int mFillColor = DEFAULT_FILL_COLOR; private Bitmap mBitmap; private BitmapShader mBitmapShader; private int mBitmapWidth; private int mBitmapHeight; private float mDrawableRadius; private float mBorderRadius; private ColorFilter mColorFilter; private boolean mReady; private boolean mSetupPending; private boolean mBorderOverlay; private boolean mDisableCircularTransformation; public CircleImageView(Context context) { super(context); init(); } public CircleImageView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public CircleImageView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle, 0); mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_civ_border_width, DEFAULT_BORDER_WIDTH); mBorderColor = a.getColor(R.styleable.CircleImageView_civ_border_color, DEFAULT_BORDER_COLOR); mBorderOverlay = a.getBoolean(R.styleable.CircleImageView_civ_border_overlay, DEFAULT_BORDER_OVERLAY); mFillColor = a.getColor(R.styleable.CircleImageView_civ_fill_color, DEFAULT_FILL_COLOR); a.recycle(); init(); } private void init() { super.setScaleType(SCALE_TYPE); mReady = true; if (mSetupPending) { setup(); mSetupPending = false; } } @Override public ScaleType getScaleType() { return SCALE_TYPE; } @Override public void setScaleType(ScaleType scaleType) { if (scaleType != SCALE_TYPE) { throw new IllegalArgumentException(String.format("ScaleType %s not supported.", scaleType)); } } @Override public void setAdjustViewBounds(boolean adjustViewBounds) { if (adjustViewBounds) { throw new IllegalArgumentException("adjustViewBounds not supported."); } } @Override protected void onDraw(Canvas canvas) { if (mDisableCircularTransformation) { super.onDraw(canvas); return; } if (mBitmap == null) { return; } if (mFillColor != Color.TRANSPARENT) { canvas.drawCircle(mDrawableRect.centerX(), mDrawableRect.centerY(), mDrawableRadius, mFillPaint); } canvas.drawCircle(mDrawableRect.centerX(), mDrawableRect.centerY(), mDrawableRadius, mBitmapPaint); if (mBorderWidth > 0) { canvas.drawCircle(mBorderRect.centerX(), mBorderRect.centerY(), mBorderRadius, mBorderPaint); } } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); setup(); } @Override public void setPadding(int left, int top, int right, int bottom) { super.setPadding(left, top, right, bottom); setup(); } @Override public void setPaddingRelative(int start, int top, int end, int bottom) { super.setPaddingRelative(start, top, end, bottom); setup(); } public int getBorderColor() { return mBorderColor; } public void setBorderColor(@ColorInt int borderColor) { if (borderColor == mBorderColor) { return; } mBorderColor = borderColor; mBorderPaint.setColor(mBorderColor); invalidate(); } /** * @deprecated Use {@link #setBorderColor(int)} instead */ @Deprecated public void setBorderColorResource(@ColorRes int borderColorRes) { setBorderColor(getContext().getResources().getColor(borderColorRes)); } /** * Return the color drawn behind the circle-shaped drawable. * * @return The color drawn behind the drawable * * @deprecated Fill color support is going to be removed in the future */ @Deprecated public int getFillColor() { return mFillColor; } /** * Set a color to be drawn behind the circle-shaped drawable. Note that * this has no effect if the drawable is opaque or no drawable is set. * * @param fillColor The color to be drawn behind the drawable * * @deprecated Fill color support is going to be removed in the future */ @Deprecated public void setFillColor(@ColorInt int fillColor) { if (fillColor == mFillColor) { return; } mFillColor = fillColor; mFillPaint.setColor(fillColor); invalidate(); } /** * Set a color to be drawn behind the circle-shaped drawable. Note that * this has no effect if the drawable is opaque or no drawable is set. * * @param fillColorRes The color resource to be resolved to a color and * drawn behind the drawable * * @deprecated Fill color support is going to be removed in the future */ @Deprecated public void setFillColorResource(@ColorRes int fillColorRes) { setFillColor(getContext().getResources().getColor(fillColorRes)); } public int getBorderWidth() { return mBorderWidth; } public void setBorderWidth(int borderWidth) { if (borderWidth == mBorderWidth) { return; } mBorderWidth = borderWidth; setup(); } public boolean isBorderOverlay() { return mBorderOverlay; } public void setBorderOverlay(boolean borderOverlay) { if (borderOverlay == mBorderOverlay) { return; } mBorderOverlay = borderOverlay; setup(); } public boolean isDisableCircularTransformation() { return mDisableCircularTransformation; } public void setDisableCircularTransformation(boolean disableCircularTransformation) { if (mDisableCircularTransformation == disableCircularTransformation) { return; } mDisableCircularTransformation = disableCircularTransformation; initializeBitmap(); } @Override public void setImageBitmap(Bitmap bm) { super.setImageBitmap(bm); initializeBitmap(); } @Override public void setImageDrawable(Drawable drawable) { super.setImageDrawable(drawable); initializeBitmap(); } @Override public void setImageResource(@DrawableRes int resId) { super.setImageResource(resId); initializeBitmap(); } @Override public void setImageURI(Uri uri) { super.setImageURI(uri); initializeBitmap(); } @Override public void setColorFilter(ColorFilter cf) { if (cf == mColorFilter) { return; } mColorFilter = cf; applyColorFilter(); invalidate(); } @Override public ColorFilter getColorFilter() { return mColorFilter; } private void applyColorFilter() { if (mBitmapPaint != null) { mBitmapPaint.setColorFilter(mColorFilter); } } private Bitmap getBitmapFromDrawable(Drawable drawable) { if (drawable == null) { return null; } if (drawable instanceof BitmapDrawable) { return ((BitmapDrawable) drawable).getBitmap(); } try { Bitmap bitmap; if (drawable instanceof ColorDrawable) { bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG); } else { bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG); } Canvas canvas = new Canvas(bitmap); drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight()); drawable.draw(canvas); return bitmap; } catch (Exception e) { e.printStackTrace(); return null; } } private void initializeBitmap() { if (mDisableCircularTransformation) { mBitmap = null; } else { mBitmap = getBitmapFromDrawable(getDrawable()); } setup(); } private void setup() { if (!mReady) { mSetupPending = true; return; } if (getWidth() == 0 && getHeight() == 0) { return; } if (mBitmap == null) { invalidate(); return; } mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP); mBitmapPaint.setAntiAlias(true); mBitmapPaint.setShader(mBitmapShader); mBorderPaint.setStyle(Paint.Style.STROKE); mBorderPaint.setAntiAlias(true); mBorderPaint.setColor(mBorderColor); mBorderPaint.setStrokeWidth(mBorderWidth); mFillPaint.setStyle(Paint.Style.FILL); mFillPaint.setAntiAlias(true); mFillPaint.setColor(mFillColor); mBitmapHeight = mBitmap.getHeight(); mBitmapWidth = mBitmap.getWidth(); mBorderRect.set(calculateBounds()); mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2.0f, (mBorderRect.width() - mBorderWidth) / 2.0f); mDrawableRect.set(mBorderRect); if (!mBorderOverlay && mBorderWidth > 0) { mDrawableRect.inset(mBorderWidth - 1.0f, mBorderWidth - 1.0f); } mDrawableRadius = Math.min(mDrawableRect.height() / 2.0f, mDrawableRect.width() / 2.0f); applyColorFilter(); updateShaderMatrix(); invalidate(); } private RectF calculateBounds() { int availableWidth = getWidth() - getPaddingLeft() - getPaddingRight(); int availableHeight = getHeight() - getPaddingTop() - getPaddingBottom(); int sideLength = Math.min(availableWidth, availableHeight); float left = getPaddingLeft() + (availableWidth - sideLength) / 2f; float top = getPaddingTop() + (availableHeight - sideLength) / 2f; return new RectF(left, top, left + sideLength, top + sideLength); } private void updateShaderMatrix() { float scale; float dx = 0; float dy = 0; mShaderMatrix.set(null); if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width() * mBitmapHeight) { scale = mDrawableRect.height() / (float) mBitmapHeight; dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f; } else { scale = mDrawableRect.width() / (float) mBitmapWidth; dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f; } mShaderMatrix.setScale(scale, scale); mShaderMatrix.postTranslate((int) (dx + 0.5f) + mDrawableRect.left, (int) (dy + 0.5f) + mDrawableRect.top); mBitmapShader.setLocalMatrix(mShaderMatrix); } }
//圆形的xml,注意这个xml要放在res/values里面

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="CircleImageView">
        <attr name="civ_border_width" format="dimension" />
        <attr name="civ_border_color" format="color" />
        <attr name="civ_border_overlay" format="boolean" />
        <attr name="civ_fill_color" format="color" />
    </declare-styleable>
</resources>

 

实现结果是真机调试,就不贴图了...

Android 实现QQ扩展listview(expandlistview)

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原文地址:http://www.cnblogs.com/yzjT-mac/p/yzj_ExpandableListView.html

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