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这篇文章主要介绍了Android如何实现微信朋友圈图片和视频播放,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
Android是一种基于Linux内核的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由美国Google公司和开放手机联盟领导及开发。
具体内容如下
1.效果图:
2.源码地址:链接
3.参数控制,是否显示播放按钮
holder.layout.setIsShowAll(mList.get(position).isShowAll); holder.layout.setIsVideo(true); //true :video, false :img holder.layout.setUrlList(mList.get(position).urlList);
4.自定义控件:
package com.example.mepositry.view; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.PorterDuff; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.drawable.Drawable; import android.support.v7.widget.AppCompatImageView; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.ViewGroup; import com.example.mepositry.R; //根据宽高比例自动计算高度ImageView public class RatioImageView extends AppCompatImageView { private int playBtnRes = R.mipmap.play_btn_video; private Bitmap playBtnBitmap; private boolean type; //true表示video private int i; //i图片id private String url; //url图片地址 private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); Rect src = new Rect(); RectF dest = new RectF(); //* 宽高比例 private float mRatio = 0f; public RatioImageView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } public RatioImageView(Context context, AttributeSet attrs) { super(context, attrs); /* TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.RatioImageView); playBtnRes = typedArray.getResourceId(R.styleable.ImageViewPlay_ivp_play_btn_res, playBtnRes); playBtnBitmap = BitmapFactory.decodeResource(getResources(), playBtnRes); mRatio = typedArray.getFloat(R.styleable.RatioImageView_ratio, 0f); typedArray.recycle();*/ } public RatioImageView(Context context) { super(context); TypedArray typedArray = context.obtainStyledAttributes(R.styleable.RatioImageView); playBtnRes = typedArray.getResourceId(R.styleable.ImageViewPlay_ivp_play_btn_res, playBtnRes); playBtnBitmap = BitmapFactory.decodeResource(getResources(), playBtnRes); mRatio = typedArray.getFloat(R.styleable.RatioImageView_ratio, 0f); typedArray.recycle(); } //*description: 设置图片类型,如果是TYPE_IMAGE,显示图片,如果是TYPE_VIDEO,显示图片,并且在图片正中心绘制一个播放按钮 public void setType(boolean type, int i, String url){ this.type = type; this.i = i; this.url = url; } //设置ImageView的宽高比 public void setRatio(float ratio) { mRatio = ratio; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); if(type){ //如果是true,显示图片,并且在图片正中心绘制一个播放按钮 Drawable drawable = getDrawable(); if (drawable != null) { int viewW = drawable.getIntrinsicWidth(); //获取图片的宽 int viewH = drawable.getIntrinsicHeight(); //获取图片的高 int btnW = playBtnBitmap.getWidth(); //获取播放按钮的宽 int btnH = playBtnBitmap.getHeight(); //获取播放按钮的高 float[] result = measureViewSize(viewW, viewH); if(result[0] > 0 && result[1] > 0){ //先根据比例缩放图标,确保绘制的时候再次回归缩放,保持播放的图片大小不变 btnW *= (viewW / result[0]); btnH *= (viewH / result[1]); } float left = (viewW - btnW) / 2.0f; float top = (viewH - btnH) / 2.0f; src.set(0, 0, btnW, btnH); dest.set(left, top, left+btnW, top+btnH); canvas.save(); canvas.concat(getImageMatrix()); canvas.drawBitmap(playBtnBitmap, src, dest, mPaint); canvas.restore(); } } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int width = MeasureSpec.getSize(widthMeasureSpec); Drawable drawable = getDrawable(); if (drawable != null) { //重新计算view int viewW = drawable.getIntrinsicWidth(); int viewH = drawable.getIntrinsicHeight(); if(viewW > 0 && viewH > 0) { float[] result = measureViewSize(viewW, viewH); setMeasuredDimension((int)result[0], (int) result[1]); } } if (mRatio != 0) { float height = width / mRatio; heightMeasureSpec = MeasureSpec.makeMeasureSpec((int) height, MeasureSpec.EXACTLY); } super.onMeasure(widthMeasureSpec, heightMeasureSpec); } @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: Drawable drawable = getDrawable(); if (drawable != null) { drawable.mutate().setColorFilter(Color.GRAY, PorterDuff.Mode.MULTIPLY); } break; case MotionEvent.ACTION_MOVE: break; case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: Drawable drawableUp = getDrawable(); if (drawableUp != null) { drawableUp.mutate().clearColorFilter(); } break; } return super.onTouchEvent(event); } // *description: 根据传入的图片宽高,计算出最终的imageview的宽高,长宽等比缩放 private float[] measureViewSize(int w, int h) { ViewGroup.LayoutParams lp = getLayoutParams(); float maxW = lp.width; float maxH = lp.height; float showWidth = w; float showHeight = h; float scale = (1.0f * maxW) / maxH; float s = 1.0f * w / h; if (w < maxW && h < maxH) { //不进行缩放 showWidth = w; showHeight = h; } else if (s > scale) { //宽取最大,高进行缩小 showWidth = maxW; showHeight = (int) (h * (showWidth * 1.0 / w)); } else if (s <= scale) {//高取最大,宽进行缩小 showHeight = maxH; showWidth = (int) (w * (showHeight * 1.0 / h)); } float[] result = new float[2]; result[0] = showWidth; result[1] = showHeight; return result; } }
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