Java Canvas.drawBitmap将源代码对半剪切
我一直在尝试用Android做一些精灵动画(这是一个大学练习),但我遇到了一个奇怪的问题。它没有绘制我定义为源的矩形,而是精确地绘制了该矩形的一半 这是我的绘图方法的代码Java Canvas.drawBitmap将源代码对半剪切,java,android,animation,canvas,android-canvas,Java,Android,Animation,Canvas,Android Canvas,我一直在尝试用Android做一些精灵动画(这是一个大学练习),但我遇到了一个奇怪的问题。它没有绘制我定义为源的矩形,而是精确地绘制了该矩形的一半 这是我的绘图方法的代码 public class Sprite { Bitmap image; Point frameSize; int[] rows; public int curFrame; public int curRow; public void draw(Canvas c, Paint p, Vector2 pos) { Rec
public class Sprite {
Bitmap image;
Point frameSize;
int[] rows;
public int curFrame;
public int curRow;
public void draw(Canvas c, Paint p, Vector2 pos)
{
Rect src;
int left = curFrame * frameSize.x;
int top = curRow * frameSize.y;
int right = left + frameSize.x;
int bottom = top + frameSize.y;
src = new Rect(left, top, right, bottom);
Rect dest = new Rect((int)pos.x, 0, (int)pos.x + frameSize.x, frameSize.y);
c.drawBitmap(image, src, dest, p);
}
这是我正在使用的图像
所有帧的大小都相同(44x40),图像为440x80,我在调用该方法时将该值作为frameSize
点基本上是一个包含一对x,y整数的对象
Vector2是一个包含一对x,y浮动的对象
出于调试目的,我还呈现了一些文本
以下是一些屏幕截图:
对不起,截图太多了。我不知道是否有办法在StackOverflow中显示更小的
我看不到你的代码。重要的是:
int left = currIndex * peopleWidth;
int top = 40;
int right = left + peopleWidth;
int bottom = 80;
//clip the bitmap to show
Rect src = new Rect(left, top, right, bottom);
//set the display location in view
Rect display = new Rect(0, 0, mWidth, mHeight);
canvas.drawBitmap(mBitmap, src, display, null);
这是我的密码:
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import com.rajesh.customcamera.R;
import java.util.concurrent.TimeUnit;
import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.annotations.NonNull;
import io.reactivex.functions.Consumer;
/**
* Created by rajesh.zhu on 2017/9/28.
*/
public class MovingPeopleView extends View {
private static final String TAG = "MovingPeopleView";
private int defaultWidth = 44;
private int defaultHeight = 40;
private int mWidth = 0;
private int mHeight = 0;
private int peopleWidth = 44;
private int peopleHeight = 40;
private int currIndex = 0;
private Bitmap mBitmap = null;
private boolean isRunning = false;
public MovingPeopleView(Context context) {
this(context, null);
}
public MovingPeopleView(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public MovingPeopleView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
}
@Override
protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
if (widthMode == MeasureSpec.EXACTLY) {
//match_parent || absolute_value
mWidth = widthSize;
} else if (widthMode == MeasureSpec.AT_MOST) {
//wrap_content
mWidth = Math.min(defaultWidth, widthSize);
} else {
mWidth = defaultWidth;
}
if (heightMode == MeasureSpec.EXACTLY) {
mHeight = heightSize;
} else if (heightMode == MeasureSpec.AT_MOST) {
mHeight = Math.min(defaultHeight, heightSize);
} else {
mHeight = defaultHeight;
}
setMeasuredDimension(mWidth, mHeight);
}
private void init(Context context) {
mBitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.icon_moving_people);
//Log.i(TAG, "Width:" + mBitmap.getWidth() + ", Height:" + mBitmap.getHeight());
//you can set the peopleWidth and peopleHeight here
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
int left = currIndex * peopleWidth;
int top = 40;
int right = left + peopleWidth;
int bottom = 80;
//clip in bitmap to show
Rect src = new Rect(left, top, right, bottom);
//set the show location in view
Rect display = new Rect(0, 0, mWidth, mHeight);
canvas.drawBitmap(mBitmap, src, display, null);
}
public void start() {
isRunning = true;
run();
}
public void stop() {
isRunning = false;
}
private void run() {
if (isRunning) {
Observable
.timer(100, TimeUnit.MILLISECONDS)
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Consumer<Long>() {
@Override
public void accept(@NonNull Long aLong) throws Exception {
currIndex++;
if (currIndex == 10) {
currIndex = 0;
}
Log.i(TAG, "run");
invalidate();
run();
}
});
}
}
public void recycler() {
if (mBitmap != null) {
mBitmap.recycle();
mBitmap = null;
}
}
}
导入android.content.Context;
导入android.graphics.Bitmap;
导入android.graphics.BitmapFactory;
导入android.graphics.Canvas;
导入android.graphics.Rect;
导入android.support.annotation.Nullable;
导入android.util.AttributeSet;
导入android.util.Log;
导入android.view.view;
导入com.rajesh.customcamera.R;
导入java.util.concurrent.TimeUnit;
导入io.reactivex.Observable;
导入io.reactivex.android.schedulers.AndroidSchedulers;
导入io.reactivex.annotations.NonNull;
导入io.reactivex.functions.Consumer;
/**
*由rajesh.zhu于2017/9/28创建。
*/
公共类MovingPeopleView扩展了视图{
私有静态最终字符串标记=“MovingPeopleView”;
私有int defaultWidth=44;
私家车高度=40;
私有int mWidth=0;
私有整数mHheight=0;
私有int peopleWidth=44;
私人内部人员身高=40;
私有int currIndex=0;
私有位图mBitmap=null;
私有布尔值isRunning=false;
公共MovingPeopleView(上下文){
这个(上下文,空);
}
public MovingPeopleView(上下文上下文,@Nullable AttributeSet attrs){
这(上下文,属性,0);
}
public MovingPeopleView(上下文上下文,@Nullable AttributeSet attrs,int-defStyleAttr){
super(上下文、attrs、defStyleAttr);
init(上下文);
}
@凌驾
测量时受保护的同步空隙(int-widthMeasureSpec、int-heightMeasureSpec){
超级测量(宽度测量、高度测量);
int widthMode=MeasureSpec.getMode(widthmasurespec);
int widthSize=MeasureSpec.getSize(widthMeasureSpec);
int heightMode=MeasureSpec.getMode(heightMeasureSpec);
int heightSize=MeasureSpec.getSize(heightMeasureSpec);
if(widthMode==MeasureSpec.justice){
//匹配父项| |绝对值
mWidth=宽度尺寸;
}else if(widthMode==MeasureSpec.AT_){
//包装内容
mWidth=数学最小值(默认宽度,宽度大小);
}否则{
mWidth=默认宽度;
}
if(heightMode==MeasureSpec.justice){
mHeight=高度尺寸;
}else if(heightMode==MeasureSpec.AT_){
mHeight=数学最小值(默认高度、高度大小);
}否则{
mHeight=默认高度;
}
设置测量尺寸(米宽,米高);
}
私有void init(上下文){
mBitmap=BitmapFactory.decodeResource(context.getResources(),R.mipmap.icon\u moving\u people);
//Log.i(标记“Width:+mBitmap.getWidth()+”,Height:+mBitmap.getHeight());
//您可以在此处设置peopleWidth和peopleHeight
}
@凌驾
公共空白绘制(画布){
超级绘画(画布);
int left=currendex*peopleWidth;
int top=40;
int right=left+peopleWidth;
int-bottom=80;
//剪辑位图以显示
Rect src=新的Rect(左、上、右、下);
//在视图中设置显示位置
Rect显示=新的Rect(0,0,mWidth,mHheight);
drawBitmap(mBitmap、src、display、null);
}
公开作废开始(){
isRunning=true;
run();
}
公共停车场(){
isRunning=false;
}
私家车{
如果(正在运行){
可观察
.计时器(100,时间单位.毫秒)
.observeOn(AndroidSchedulers.mainThread())
.订阅(新消费者){
@凌驾
public void accept(@NonNull Long-aLong)引发异常{
currendex++;
如果(当前索引==10){
货币指数=0;
}
Log.i(标记“运行”);
使无效();
run();
}
});
}
}
公共废物回收商(){
如果(mBitmap!=null){
mBitmap.recycle();
mBitmap=null;
}
}
}
您可以在XML中使用它:
<com.rajesh.customcamera.view.MovingPeopleView
android:id="@+id/moving_people"
android:layout_width="50dp"
android:layout_height="50dp" />
可观察到的部分看起来很危险。你应该把代码放在其他地方,并注意订阅。可能在onAttach中开始可见,在onAttach中取消订阅或在可见性更改时开始可见。