Android 自定义View,仿微信视频播放按钮

闲着,尝试实现了新版微信视频播放按钮,使用的是自定义View,先来个简单的效果图。。。真的很简单哈。

Android 自定义View,仿微信视频播放按钮

由于暂时用不到,加上时间原因,加上实在是没意思,加上……,本控件就没有实现自定义属性,有兴趣的朋友可以自己去添加一下,方法都给你们准备好了。- =

其实这个控件主要步骤

1、画外环的圆

2、画进度的圆或者画三角形播放按钮

其余剩下的都是围绕以上两步准备或者收尾的。

接下来贴主要我们的自定义控件代码,注释很全,我就不过多解释了,请各位看官自己分析,有疑问可以在评论区一起讨论。

package com.lwd.playbutton;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import android.view.View.OnClickListener;
/**
 * 仿微信视频播放按钮
 * @author Vitor Lee
 */
public class PlayButton extends View implements OnClickListener {
    /**默认最大角度*/
    private static final int DEFAULT_MAX_ANGLE = 360;
    /**默认最大的进度*/
    private static final int DEFAULT_MAX_PROGRESS=100;
    /**描边宽度*/
    private int mStrokeWidth;
    /**外圆环半径*/
    private int mOutRadius;
    /**内圆半径*/
    private int mInnerRiadius;
    /**控件的宽度*/
    private int mWidth;
    /**控件的高度*/
    private int mHeight;
    /**描边的画笔*/
    private Paint mStrokePaint;
    /**实心画笔*/
    private Paint mFillPaint;
    /**进度圆的*/
    private RectF mProgressOval;
    /**最大进度*/
    private int mMax=DEFAULT_MAX_PROGRESS;
    /**当前进度*/
    private int mProgress;
    /**三角形的路径*/
    private Path mTriangle;
    private ProgressState mCurrentState=ProgressState.PRE_START;
    
    public PlayButton(Context context) {
        this(context,null);
    }
    
    public PlayButton(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }
    
    public PlayButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        initParams();
        initAttribute(context, attrs, defStyle);
    }

    private void initParams() {
        mStrokeWidth = (int) TypedValue.applyDimension(
                TypedValue.COMPLEX_UNIT_SP, 1, getResources()
                        .getDisplayMetrics());
        
        //初始化描边的笔
        mStrokePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mStrokePaint.setColor(Color.WHITE);
        mStrokePaint.setStyle(Paint.Style.STROKE);
        mStrokePaint.setStrokeWidth(mStrokeWidth);
        
        //初始化画实心的笔
        mFillPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mFillPaint.setColor(Color.WHITE);
        mFillPaint.setStyle(Paint.Style.FILL);
        
        setOnClickListener(this);
    }

    private void initAttribute(Context context, AttributeSet attrs, int defStyle) {
        //TODO 增加自定义属性,解析应用自定义属性
    }
    
    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        mWidth = w;
        mHeight = h;
        
        //计算外环的半径 得到控件宽高的最小值作为圆的半径,还要减去掉描边的宽度
        mOutRadius = (Math.min(w, h))/2-mStrokeWidth;
        //计算进度圆的半径,减去两倍描边宽度,作为进度圆和外圆环之间的间隙
        mInnerRiadius =mOutRadius-2*mStrokeWidth;
        //确定进度圆的范围
        mProgressOval = new RectF(mWidth / 2 - mInnerRiadius, mHeight / 2
                - mInnerRiadius, mWidth / 2 + mInnerRiadius, mHeight
                / 2 + mInnerRiadius);
        
        int triangleHeight = mOutRadius/3;
        //用三个点来确定三角形的位置,这里以外圆环直径的1/3作为三角形的水平方向的高度,
        //水平方向向右做了 1/2高度的偏移,让三角形中心与圆的中心重叠(从视觉上来说是中心了,从科学的角度来讲这里应该不是中心,博主数学基础不扎实。。)
        mTriangle = new Path();
        mTriangle.moveTo(w/2-triangleHeight/2,w/2-triangleHeight);
        mTriangle.lineTo(w/2+triangleHeight+triangleHeight/2,h/2);
        mTriangle.lineTo(w/2-triangleHeight/2,w/2+triangleHeight);
        mTriangle.close();
        //等边三角形
//        mRantange = new Path();
//        float halfOfRantangeHeight = (float) (Math.sqrt(1f/27*Math.pow(mOutRadius*2,2)));
//        Log.e("xxx","mOutRadius/3="+mOutRadius/3+" ,halfOfRantangeHeight="+halfOfRantangeHeight);
//        mRantange.moveTo(w/2-mOutRadius/6,h/2-halfOfRantangeHeight);
//        mRantange.lineTo(w/2+mOutRadius/3+mOutRadius/6,h/2);
//        mRantange.lineTo(w/2-mOutRadius/6,h/2+halfOfRantangeHeight);
//        mRantange.close();
        
    }
    
    @Override
    protected void onDraw(Canvas canvas) {
        //绘制外圆环
        canvas.drawCircle(mWidth/2,mHeight/2,mOutRadius,mStrokePaint);
        if (mCurrentState==ProgressState.RUNNING) {//运行状态,绘制进度圆
            canvas.drawArc(mProgressOval,-90,(mProgress*1f/mMax*DEFAULT_MAX_ANGLE),true,mFillPaint);
        }else{//非运行状态画三角形
            canvas.drawPath(mTriangle,mStrokePaint);
        }
    }
    
    @Override
    public void onClick(View v) {
        switch (mCurrentState) {
        case PRE_START:
            if (listener != null) {
                listener.onStart();
            }
            mCurrentState = ProgressState.RUNNING;
            break;
        case RUNNING:
            if (listener != null) {
                listener.onPause(mProgress * 100 / mMax);
            }
            mCurrentState = ProgressState.PAUSE;
            invalidate();
            break;
        case PAUSE:
            if (listener != null) {
                listener.onStart();
            }
            mCurrentState = ProgressState.RUNNING;
            invalidate();
            break;
        case COMPLETELY:
            if (listener!=null) {
                listener.onCompletedClick();
            }
            break;
        }
    }
    
    private OnProgressClickListener listener;
    
    /**
     * 设置最大值
     * @param max 最大值
     */
    public void setMax(int max){
        mMax=max;
    }
    
    /**
     * 设置当前进度
     * @param progress 当前进度
     */
    public void setProgress(int progress){
        mProgress=progress;
        if (mCurrentState!=ProgressState.RUNNING) {
            mCurrentState=ProgressState.RUNNING;
        }
        if (mProgress>=mMax) {
            mCurrentState=ProgressState.COMPLETELY;
            if (listener!=null) {//进度圆完成回调
                listener.onCompletely();
            }
        }
        invalidate();
    }

    /**
     * 设置监听事件
     * @param l 监听器
     */
    public void setOnProgressClickListener(OnProgressClickListener l) {
        this.listener = l;
    }
    
    /**
     * 这里提供了四个回调方法,比较多,可能只用到其中几个,
     * 所以采用了抽象类来实现,除了必要的开始操作以外,
     * 其他的操作用户需要哪个方法自己复写就行了。 
     */
    public static abstract class OnProgressClickListener {
        /** 开始 */
        public abstract void onStart();

        /** 暂停 */
        public void onPause(int percent){};

        /** 结束 */
        public void onCompletely(){};
        
        /** 完成后点击 */
        public void onCompletedClick(){};
    }
    
    /**控件状态*/
    public enum ProgressState{
        /**开始之前*/
        PRE_START,
        /**运行*/
        RUNNING,
        /**暂停*/
        PAUSE,
        /**完成*/
        COMPLETELY;
    }
    
}

接下来我们说说怎么使用,现在xml中定义我们的自定义控件。

<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="${relativePackage}.${activityClass}"
    android:background="@android:color/black" >

    <com.lwd.playbutton.PlayButton
        android:id="@+id/buffer_button"
        android:layout_width="50dp"
        android:layout_height="50dp"
        />

</RelativeLayout>

然后我们在Activity中模拟一下缓冲视频,并且播放的操作。

package com.lwd.playbutton;
    
import com.lwd.bufferbutton.R;
import com.lwd.playbutton.PlayButton.OnProgressClickListener;

import android.app.Activity;
import android.os.Bundle;
import android.os.SystemClock;
import android.widget.Toast;
/**
 * 模拟视频缓冲的activity
 * @author Vitor Lee
 */
public class MainActivity extends Activity {

    private static final int DEFAULT_MAX_VALUE = 100;
    private int mProgress = 0;
    private PlayButton mProgressView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mProgressView = (PlayButton) findViewById(R.id.buffer_button);
        mProgressView.setOnProgressClickListener(getProgressClickListener());
        mProgressView.setMax(DEFAULT_MAX_VALUE);
    }

    private OnProgressClickListener getProgressClickListener() {
        return new OnProgressClickListener() {
            
            private Thread mDownloadThread;
            private boolean isStop;
            
            @Override
            public void onStart() {//模拟下载
                if (mDownloadThread==null) {
                    mDownloadThread = new Thread() {
                        @Override
                        public void run() {
                            while (true) {
                                if (!isStop) {
                                    runOnUiThread(new Runnable() {
                                        @Override
                                        public void run() {
                                            mProgressView.setProgress(mProgress);
                                            mProgress++;
                                        }
                                    });
                                    if (mProgress==DEFAULT_MAX_VALUE) {
                                        break;
                                    }
                                }
                                SystemClock.sleep(100);
                            }
                        }
                    };
                    mDownloadThread.start();
                }
                isStop=false;
            }

            @Override
            public void onPause(int percent) {//暂停
                isStop=true;
            }

            @Override
            public void onCompletely() {
                Toast.makeText(MainActivity.this, "完成", 1).show();
            }

            @Override
            public void onCompletedClick() {//缓冲完成之后点击播放
                Toast.makeText(MainActivity.this, "播放", 1).show();
            }
            
        };
    }
}

 

Android 自定义View,仿微信视频播放按钮

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