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);
}
@Override
public 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脚本之家。
