Android自定義View實現微信語音介面
阿新 • • 發佈：2020-01-07
前言
因為最近的專案需要使用錄音功能，開始的想法是Button+OnTouchListener+Dialog實現，在大部分手機中都沒問題，只有MI8會偶爾無法觸發MotionEvent.ACTION_UP，導致程式異常。所以就自己寫了個自定義View來實現，主要也是通過監聽
OnTouchListener+Dialog來實現。這裡只實現了自定義View，並不涉及錄音和播放。效果圖如下：
程式碼
程式碼並不複雜，配合註釋應該很容易理解。
/**
* Author ： BlackHao
* Time : 2019/4/18 14:03
* Description : 自定義錄音按鈕佈局介面
*/
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;
//當前是否是按下狀態
private boolean isPressed = false;
//
private PressCallback callback;
//按下的位置y座標
private int pressedY = 0;
//當前是否是outSize
private boolean isOutSize = false;
//字型dp大小
private static int TEXT_SIZE = 20;
//對話方塊相關
private Dialog soundVolumeDialog = null;
//音量圖片
private ImageView soundVolumeImg = null;
//對話方塊背景
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 說話";
pressedRes = R.drawable.red_btn_bk;
pressedText = "鬆開 結束";
//
setOnTouchListener(this);
//
initSoundVolumeDlg();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
rect.set(0,getWidth(),getHeight());
if (!isPressed) {
setBackgroundResource(normalRes);
drawTextOnRect(canvas,rect,normalText);
} else {
setBackgroundResource(pressedRes);
drawTextOnRect(canvas,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) {
//回撥
callback.onStartRecord();
//按下，彈出對話方塊
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 < getHeight()) {
//錄音結束
if (soundVolumeDialog.isShowing()) {
soundVolumeDialog.dismiss();
}
callback.onStopRecord();
} else {
//錄音取消
if (soundVolumeDialog.isShowing()) {
soundVolumeDialog.dismiss();
}
callback.onCancelRecord();
}
}
}
break;
case MotionEvent.ACTION_MOVE:
if (isPressed && callback != null) {
int upY = (int) event.getRawY();
if (pressedY - upY < getHeight()) {
if (isOutSize) {
isOutSize = false;
soundVolumeLayout.setBackgroundResource(R.mipmap.sound_volume_default_bk);
}
} else {
if (!isOutSize) {
isOutSize = true;
soundVolumeLayout.setBackgroundResource(R.mipmap.sound_volume_cancel_bk);
}
}
}
break;
}
return true;
}
public void setCallback(PressCallback callback) {
this.callback = callback;
}
public interface PressCallback {
//開始錄音
void onStartRecord();
//停止錄音
void onStopRecord();
//取消錄音
void onCancelRecord();
}
/**
* 在指定矩形中間drawText
*
* @param canvas 畫布
* @param targetRect 指定矩形
* @param text 需要繪製的Text
*/
private void drawTextOnRect(Canvas canvas,Rect targetRect,String text) {
Paint.FontMetricsInt fontMetrics = paint.getFontMetricsInt();
// 獲取baseLine
int baseline = targetRect.top + (targetRect.bottom - targetRect.top - fontMetrics.bottom + fontMetrics.top) / 2 - fontMetrics.top;
// 下面這行是實現水平居中，drawText對應改為傳入targetRect.centerX()
paint.setTextAlign(Paint.Align.CENTER);
canvas.drawText(text,targetRect.centerX(),baseline,paint);
}
/**
* 初始化音量資訊對話方塊
*/
private void initSoundVolumeDlg() {
soundVolumeDialog = new Dialog(getContext(),R.style.SoundVolumeStyle);
soundVolumeDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
soundVolumeDialog.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
soundVolumeDialog.setContentView(R.layout.tt_sound_volume_dialog);
soundVolumeDialog.setCanceledOnTouchOutside(true);
soundVolumeImg = (ImageView) soundVolumeDialog.findViewById(R.id.sound_volume_img);
soundVolumeLayout = (RelativeLayout) soundVolumeDialog.findViewById(R.id.sound_volume_bk);
}
/**
* 根據分貝值設定錄音時的音量動畫
*/
public void setVolume(int voiceValue) {
if (voiceValue < 200.0) {
soundVolumeImg.setImageResource(R.mipmap.sound_volume_01);
} else if (voiceValue > 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);
}
}
}結語
原始碼github地址：仿微信語音介面
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。