Android自定义View实现微信语音界面

/**
 * Author ： BlackHao
 * Time : 2019/4/18 14:03
 * Description : 自定义录音按钮布局界面
 */
public class PressedView extends View implements View.OnTouchListener {

  private int normalRes;
  private String normalText = "";
  private int pressedRes;
  private String pressedText = "";
  //
  private Paint paint;
  private Rect rect;
  //当前是否是按下状态
  private boolean isPressed = false;
  //
  private PressCallback callback;
  //按下的位置y坐标
  private int pressedY = 0;
  //当前是否是outSize
  private boolean isOutSize = false;
  //字体dp大小
  private static int TEXT_SIZE = 20;
  //对话框相关
  private Dialog soundVolumeDialog = null;
  //音量图片
  private ImageView soundVolumeImg = null;
  //对话框背景
  private RelativeLayout soundVolumeLayout = null;

  public PressedView(Context context) {
    super(context);
    init();
  }

  public PressedView(Context context, @Nullable AttributeSet attrs) {
    super(context, attrs);
    init();
  }

  public PressedView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init();
  }

  private void init() {
    //
    paint = new Paint();
    paint.setAntiAlias(true);
    paint.setTextSize(DensityUtil.dip2px(getContext(), TEXT_SIZE));
    paint.setColor(Color.WHITE);
    rect = new Rect();
    //
    normalRes = R.drawable.blue_btn_bk;
    normalText = "按住 说话";
    pressedRes = R.drawable.red_btn_bk;
    pressedText = "松开 结束";
    //
    setOnTouchListener(this);
    //
    initSoundVolumeDlg();
  }

  @Override
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    rect.set(0, 0, getWidth(), getHeight());
    if (!isPressed) {
      setBackgroundResource(normalRes);
      drawTextOnRect(canvas, rect, normalText);
    } else {
      setBackgroundResource(pressedRes);
      drawTextOnRect(canvas, rect, pressedText);
    }
  }

  @Override
  public boolean onTouch(View v, MotionEvent event) {
    switch (event.getAction()) {
      case MotionEvent.ACTION_DOWN:
        pressedY = (int) event.getRawY();
        isOutSize = false;
        if (!isPressed) {
          isPressed = true;
          postInvalidate();
          if (callback != null) {
            //回调
            callback.onStartRecord();
            //按下，弹出对话框
            soundVolumeImg.setImageResource(R.mipmap.sound_volume_01);
            soundVolumeImg.setVisibility(View.VISIBLE);
            soundVolumeLayout.setBackgroundResource(R.mipmap.sound_volume_default_bk);
            soundVolumeDialog.show();
          }
        }
        break;
      case MotionEvent.ACTION_UP:
        if (isPressed) {
          isPressed = false;
          postInvalidate();
          if (callback != null) {
            int upY = (int) event.getRawY();
            if (pressedY - upY  200.0 && voiceValue <600) {
      soundVolumeImg.setImageResource(R.mipmap.sound_volume_02);
    } else if (voiceValue > 600.0 && voiceValue <1200) {
      soundVolumeImg.setImageResource(R.mipmap.sound_volume_03);
    } else if (voiceValue > 1200.0 && voiceValue <2400) {
      soundVolumeImg.setImageResource(R.mipmap.sound_volume_04);
    } else if (voiceValue > 2400.0 && voiceValue <10000) {
      soundVolumeImg.setImageResource(R.mipmap.sound_volume_05);
    } else if (voiceValue > 10000.0 && voiceValue <28000.0) {
      soundVolumeImg.setImageResource(R.mipmap.sound_volume_06);
    } else if (voiceValue > 28000.0) {
      soundVolumeImg.setImageResource(R.mipmap.sound_volume_07);
    }
  }

}