CameraHintView.java
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package com.cnlive.demo.stream;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.os.Handler;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import com.cnlive.libs.stream.base.ICNCameraHintView;
import java.util.Locale;
/**
* View to show camera focus rect and zoom value.
*/
public class CameraHintView extends View implements ICNCameraHintView {
private static final String TAG = "CameraHintView";
private static final int COLOR_FOCUSING = 0xeed7d7d7;
private static final int COLOR_FOCUSED = 0xee00ff00;
private static final int COLOR_UNFOCUSED = 0xeeff0000;
private static final int COLOR_ZOOM_TEXT = 0xffffffff;
private boolean mShowRect;
private Rect mRect;
private Paint mFocusPaint;
private Handler mHandler;
private Runnable mHideRect;
private Paint mZoomPaint;
private boolean mShowZoomRatio;
private float mZoomRatio;
private Runnable mHideZoom;
public CameraHintView(Context context) {
super(context);
init();
}
public CameraHintView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
mHandler = new Handler();
mHideRect = new Runnable() {
@Override
public void run() {
mShowRect = false;
invalidate();
}
};
mHideZoom = new Runnable() {
@Override
public void run() {
mShowZoomRatio = false;
invalidate();
}
};
mFocusPaint = new Paint();
mFocusPaint.setStyle(Paint.Style.STROKE);
mFocusPaint.setStrokeWidth(dpToPx(1));
mZoomPaint = new Paint();
mZoomPaint.setTypeface(Typeface.create(Typeface.DEFAULT, Typeface.NORMAL));
mZoomPaint.setStyle(Paint.Style.FILL_AND_STROKE);
mZoomPaint.setStrokeWidth(1);
mZoomPaint.setColor(COLOR_ZOOM_TEXT);
mZoomPaint.setTextAlign(Paint.Align.CENTER);
mZoomPaint.setTextSize(dpToPx(16));
mZoomPaint.setAntiAlias(true);
mZoomPaint.setFilterBitmap(true);
}
public void hideAll() {
mHandler.removeCallbacks(mHideRect);
mHandler.removeCallbacks(mHideZoom);
mHandler.post(mHideRect);
mHandler.post(mHideZoom);
}
@Override
public void updateZoomRatio(float val) {
mShowZoomRatio = true;
mZoomRatio = val;
mHandler.removeCallbacks(mHideZoom);
if (val == 1.0f) {
mHandler.postDelayed(mHideZoom, 1000);
}
invalidate();
}
@Override
public void startFocus(Rect rect) {
mShowRect = true;
mRect = rect;
mFocusPaint.setColor(COLOR_FOCUSING);
mHandler.removeCallbacks(mHideRect);
mHandler.postDelayed(mHideRect, 3000);
invalidate();
}
@Override
public void setFocused(boolean success) {
mShowRect = true;
mFocusPaint.setColor(success ? COLOR_FOCUSED : COLOR_UNFOCUSED);
mHandler.removeCallbacks(mHideRect);
mHandler.postDelayed(mHideRect, 400);
invalidate();
}
@Override
public void onDraw(Canvas canvas) {
if (mShowRect) {
mFocusPaint.setStrokeWidth(3);
mFocusPaint.setStyle(Paint.Style.STROKE);
canvas.drawRect(mRect.left, mRect.top, mRect.right, mRect.bottom, mFocusPaint);
}
if (mShowZoomRatio) {
String text = String.format(Locale.getDefault(), "%.1f", mZoomRatio) + "x";
int x = (int) (getWidth() * 0.5f);
int y = (int) dpToPx(48);
canvas.drawText(text, x, y, mZoomPaint);
}
}
private float dpToPx(float dp) {
return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,
getResources().getDisplayMetrics());
}
}