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這篇文章主要為大家展示了“Android如何自定義View實(shí)現(xiàn)微信語(yǔ)音界面”,內(nèi)容簡(jiǎn)而易懂,條理清晰,希望能夠幫助大家解決疑惑,下面讓小編帶領(lǐng)大家一起研究并學(xué)習(xí)一下“Android如何自定義View實(shí)現(xiàn)微信語(yǔ)音界面”這篇文章吧。
代碼
代碼并不復(fù)雜,配合注釋?xiě)?yīng)該很容易理解。
/** * Author : BlackHao * Time : 2019/4/18 14:03 * Description : 自定義錄音按鈕布局界面 */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; //當(dāng)前是否是按下?tīng)顟B(tài) private boolean isPressed = false; // private PressCallback callback; //按下的位置y坐標(biāo) private int pressedY = 0; //當(dāng)前是否是outSize private boolean isOutSize = false; //字體dp大小 private static int TEXT_SIZE = 20; //對(duì)話框相關(guān) private Dialog soundVolumeDialog = null; //音量圖片 private ImageView soundVolumeImg = null; //對(duì)話框背景 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 說(shuō)話"; pressedRes = R.drawable.red_btn_bk; pressedText = "松開(kāi) 結(jié)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) { //回調(diào) callback.onStartRecord(); //按下,彈出對(duì)話框 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 < getHeight()) { //錄音結(jié)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(kāi)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(huà)布 * @param targetRect 指定矩形 * @param text 需要繪制的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(shí)現(xiàn)水平居中,drawText對(duì)應(yīng)改為傳入targetRect.centerX() paint.setTextAlign(Paint.Align.CENTER); canvas.drawText(text, targetRect.centerX(), baseline, paint); } /** * 初始化音量信息對(duì)話框 */ 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(jù)分貝值設(shè)置錄音時(shí)的音量動(dòng)畫(huà) */ 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); } }}
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