Android简单自定义音乐波动特效图

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/**
 * 音乐播放波动动画
 */
 
public class MusicPlayView extends View {
    //坐标原点x
    private float mBasePointX;
 
    //坐标原点y
    private float mBasePointY;
 
    //指针的数量 默认10
    private int mPointNum;
 
    //指针间的间隙  默认5dp
    private float mPointSpace;
 
    //每个指针的宽度 默认5dp
    private float mPointWidth;
 
    //指针的颜色
    private int mPointColor = Color.RED;
 
    //指针的集合
    private List mPoints;
 
    //控制开始/停止
    private boolean mIsPlaying = false;
 
    //播放线程
    private Thread mPlayThread;
 
    //指针波动速度
    private int mPointSpeed;
 
    //画笔
    private Paint mPaint;
 
    public MusicPlayView(Context context) {
        super(context);
        init();
    }
 
    public MusicPlayView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        //取出自定义属性
        TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.musicPlayViewAttr);
        mPointNum = ta.getInt(R.styleable.musicPlayViewAttr_point_num, 10);
        mPointWidth = dp2px(getContext(),
                ta.getFloat(R.styleable.musicPlayViewAttr_point_width, 5f));
        mPointColor = ta.getColor(R.styleable.musicPlayViewAttr_point_color, Color.RED);
        mPointSpeed = ta.getInt(R.styleable.musicPlayViewAttr_point_speed, 40);
        init();
    }
 
    public MusicPlayView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.musicPlayViewAttr);
        mPointNum = ta.getInt(R.styleable.musicPlayViewAttr_point_num, 10);
        mPointWidth = dp2px(getContext(), ta.getFloat(R.styleable.musicPlayViewAttr_point_width, 5f));
        mPointColor = ta.getColor(R.styleable.musicPlayViewAttr_point_color, Color.RED);
        mPointSpeed = ta.getInt(R.styleable.musicPlayViewAttr_point_speed, 40);
        init();
    }
 
    /**
     * 初始化画笔
     */
    private void init() {
        mPoints = new ArrayList<>();
        //绘制虚线
        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mPaint.setColor(mPointColor);
        mPaint.setAntiAlias(true);
        mPaint.setStrokeWidth(mPointWidth);
        mPaint.setPathEffect(new DashPathEffect(new float[]{25, 15}, 0));//虚线间隔
        setLayerType(LAYER_TYPE_SOFTWARE, null);
    }
 
    /**
     * 设置指针高度和即那个
     */
    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        //获取逻辑原点的Y
        mBasePointY = getHeight() - getPaddingBottom();
        Random random = new Random();
        if (mPoints != null)
            mPoints.clear();
        for (int i = 0; i 

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public class MainActivity2 extends AppCompatActivity implements View.OnClickListener {
    private Button mBtPlay,mBtStop;
    private MusicPlayView mMusicPlayView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        mMusicPlayView = findViewById(R.id.music_play);
        mBtPlay = findViewById(R.id.bt_play);
        mBtStop = findViewById(R.id.bt_stop);
        mBtPlay.setOnClickListener(this);
        mBtStop.setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.bt_play:
                //开始播放
                mMusicPlayView.start();
                break;
            case R.id.bt_stop:
                //停止播放
                mMusicPlayView.stop();
                break;
 
        }
    }
}