我有一个视图，其中有一个矩形，几条线从矩形边缘出来。我已经为整个视图设置了onClickListener，但是有什么方法可以为视图的各个部分（行）设置onClickListener？
我的问题是我们是否可以将侦听器设置为android中的部分视图？
我的视图类（DrawView.java）
public class DrawView extends View {
Paint paint = new Paint();
Rect r =new Rect(0, 0, 300, 40);
public DrawView(Context context) {
this(context, null);
}
public DrawView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DrawView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void onDraw(Canvas canvas) {
paint.setColor(Color.GREEN);
canvas.save();
canvas.scale(mScaleFactor, 1);
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.BLUE);
canvas.drawRect(r, paint);
makeLinesinRange(0,40,300,40,300, 10, canvas,100); // this will make 10 lines from edge of rectangle in downward side
requestLayout();
}
private void makeLinesinRange(int x1, int y1, int x2, int y2, int size, int total_events, Canvas canvas,int width)
{
paint.setStrokeWidth(6);
paint.setColor(Color.GRAY);
if(total_events<1)
{
return;
}
if(total_events==1)
{
canvas.drawLine(((x1+x2)/2), y1, (x1+x2)/2, y2+size, paint);
}
else if(total_events==2)
{
canvas.drawLine(((x1+x2)/3), y1, (x1+x2)/3, y2+size, paint);
canvas.drawLine((2*(x1+x2)/3), y1, 2*(x1+x2)/3, y2+size, paint);
}
else
{
paint.setStrokeWidth(6);
paint.setColor(Color.GRAY);
float kk=(x2-x1)/(total_events-1);
for(int i=0;i<total_events;i++)
{
canvas.drawLine(x1+i*kk, y1, x1+i*kk, y2+size, paint);
}
}
}
}
我的活动包含了drawview
public class MainActivity extends Activity {
DrawView drawView;
public class DrawView extends View {
Paint paint = new Paint();
Rect r = new Rect(0, 0, 300, 40);
float mScaleFactor = 1.0f;
int width = 5;
int height = 300;
List<HashMap<String, RectF>> lines = new ArrayList<HashMap<String, RectF>>();
public DrawView(Context context) {
this(context, null);
}
public DrawView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DrawView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void onDraw(Canvas canvas) {
paint.setColor(Color.GREEN);
canvas.save();
canvas.scale(mScaleFactor, 1);
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.BLUE);
canvas.drawRect(r, paint);
makeLinesinRange(10, canvas); // this will
// make 10 lines
// from edge of
// rectangle in
// downward side
requestLayout();
}
private void makeLinesinRange(int total_events, Canvas canvas) {
paint.setStrokeWidth(6);
paint.setColor(Color.GRAY);
int x = 0;
int y = 40;
int range = r.width()/total_events;
range= range + ((range*10)/100);
for (int i = 0; i < total_events; i++) {
RectF r = new RectF();
r.set(x, y, x + width, y + height);
Paint mPaint = new Paint();
mPaint.setPathEffect(null);
canvas.drawRect(r, paint);
HashMap<String, RectF> item = new HashMap<String, RectF>();
item.put("" + i, r);
lines.add(item);
x+=range;
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
for (int i = 0; i < lines.size(); i++) {
RectF r = lines.get(i).get("" + i);
if (r.contains(event.getX(), event.getY())) {
Toast.makeText(getContext(), "" + (i+1) + " line clicked", Toast.LENGTH_SHORT).show();
System.out.println((i+1) + " line clicked");
break;
}
}
return false;
}
return true;
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
drawView = new DrawView(this);
drawView.setBackgroundColor(Color.WHITE);
setContentView(drawView);
}
}
现在我的新代码onDraw方法是
Rect r = new Rect（0,0,700,40）;
public void onDraw(Canvas canvas) {
width=sf*700;
canvas.save();
makeLinesinRangetwo(10, canvas); // this will
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.BLUE);
canvas.drawRect(r, paint);
canvas.scale(sf,1,100,200);
requestLayout();
canvas.restore();
}
在这种情况下，只有线条在缩放时展开，但矩形不是。
答案 0 :(得分：1)
试试希望帮助你。
我已在您的线路上实施点击事件。试试这段代码。
public class DrawView extends View {
Paint paint = new Paint();
Rect r = new Rect(0, 0, 300, 40);
float mScaleFactor = 1.0f;
int width = 5;
int height = 300;
List<HashMap<String, RectF>> lines = new ArrayList<HashMap<String, RectF>>();
public DrawView(Context context) {
this(context, null);
}
public DrawView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DrawView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void onDraw(Canvas canvas) {
paint.setColor(Color.GREEN);
canvas.save();
canvas.scale(mScaleFactor, 1);
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.BLUE);
canvas.drawRect(r, paint);
makeLinesinRange(10, canvas); // this will
// make 10 lines
// from edge of
// rectangle in
// downward side
requestLayout();
}
private void makeLinesinRange(int total_events, Canvas canvas) {
paint.setStrokeWidth(6);
paint.setColor(Color.GRAY);
int x = 0;
int y = 40;
int range = r.width()/total_events;
range= range + ((range*10)/100);
for (int i = 0; i < total_events; i++) {
RectF r = new RectF();
r.set(x, y, x + width, y + height);
Paint mPaint = new Paint();
mPaint.setPathEffect(null);
canvas.drawRect(r, paint);
HashMap<String, RectF> item = new HashMap<String, RectF>();
item.put("" + i, r);
lines.add(item);
x+=range;
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
for (int i = 0; i < lines.size(); i++) {
RectF r = lines.get(i).get("" + i);
if (r.contains(event.getX(), event.getY())) {
Toast.makeText(getContext(), "" + (i+1) + " line clicked", Toast.LENGTH_SHORT).show();
System.out.println((i+1) + " line clicked");
break;
}
}
return false;
}
return true;
}
}