最近项目上要实现语音搜索功能，界面样式要模仿一下UC浏览器的样式，UC浏览器中有一个控件，会随着声音大小浮动，然后寻思偷个懒，百度一下，结果也没有找到类似的，只能自己动手了。

先上图看我实现的效果：

这是自定义控件的代码，里面注释也很明白，就不费话了

public class CustomCircleView extends View{ private Paint mPaint; private int strokeWidth = 0; //圆环的宽度 private Bitmap bitmap = null; // 图片位图 private int nBitmapWidth = 0; // 图片的宽度 private int nBitmapHeight = 0; // 图片的高度 private int width; //view的宽度 private int height ; //view的高度 private int bigCircleColor =0; //view的高度 private int floatCircleColor =0; //view的高度 public CustomCircleView(Context context) { this(context, null); } public CustomCircleView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public CustomCircleView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.CustomCircleView, defStyleAttr, 0); int n = a.getIndexCount(); for (int i = 0; i < n; i++) { int attr = a.getIndex(i); switch (attr) { case R.styleable.CustomCircleView_icon: bitmap = BitmapFactory.decodeResource(getResources(), a.getResourceId(attr, 0)); break; case R.styleable.CustomCircleView_bigCircleColor: bigCircleColor = a.getColor(attr, Color.GRAY); break; case R.styleable.CustomCircleView_floatCircleColor: floatCircleColor = a.getColor(attr,Color.GREEN); break; } } a.recycle(); mPaint = new Paint(); //如果布局中没有设置bigCircleColor和floatCircleColor的时候给他一个默认值 if (bigCircleColor==0){ bigCircleColor=Color.parseColor("#FFEEF0F1"); } if (floatCircleColor==0){ floatCircleColor=Color.parseColor("#25c1f5"); } // 获取图片高度和宽度 nBitmapWidth = bitmap.getWidth(); nBitmapHeight = bitmap.getHeight(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthMode = MeasureSpec.getMode(widthMeasureSpec); int widthSize = MeasureSpec.getSize(widthMeasureSpec); int heightMode = MeasureSpec.getMode(heightMeasureSpec); int heightSize = MeasureSpec.getSize(heightMeasureSpec); //获取view的高度和宽度 这个view必须给精确值！！！！！！！！ if (widthMode == MeasureSpec.EXACTLY) { width = widthSize; } if (heightMode == MeasureSpec.EXACTLY) { height = heightSize; } setMeasuredDimension(width, height); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setAntiAlias(true); // 消除锯齿 //绘制最外层灰色大圆 mPaint.setColor(bigCircleColor); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(height/2-nBitmapHeight/2); //计算圆的半径稍微麻烦点，但是在图上画一下应该能明白 (height/2-nBitmapHeight/2)/2+nBitmapHeight/2 canvas.drawCircle(width/2, height/2, (height/2-nBitmapHeight/2)/2+nBitmapHeight/2, mPaint); //绘制浮动的圆 mPaint.setColor(floatCircleColor); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(strokeWidth); canvas.drawCircle(width/2, height/2, strokeWidth/2+nBitmapHeight/2, mPaint); //绘制中间图标 canvas.drawBitmap(bitmap, width/2-nBitmapWidth/2, height/2-nBitmapHeight/2, mPaint); } //根据传入的宽度重新绘制 public void setStrokeWidth(int with){ this.strokeWidth=with; invalidate(); }}

在res/values 下建一个attrs文件 代码：

<resources> <declare-styleable name="CustomCircleView"> <attr name="bigCircleColor" format="color" /> <attr name="floatCircleColor" format="color" /> <attr name="icon" format="reference" /> </declare-styleable></resources>

在布局中的使用：

<com.example.administrator.mycustomcircleview.CustomCircleView android:id="@+id/customView" android:layout_width="200dp" android:layout_height="200dp" android:layout_gravity="center" app:icon="@mipmap/voice_icon" app:floatCircleColor="@color/colorAccent" app:bigCircleColor="@color/colorPrimaryDark" />

高度宽度一定要给精确值，切记啊！！！颜色值可以不设定，默认就是我上面图的效果。
然后根据音量大小直接传入数值就可以了，很简单的使用方法，这里我用随机数代替了。

customView = ((CustomCircleView) findViewById(R.id.customView)); button = ((Button) findViewById(R.id.button)); button.setOnClickListener(this);}@Overridepublic void onClick(View v) { Random random=new Random(); customView.setStrokeWidth(random.nextInt(100));}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。